Alternator Exciter Wire Diode

There are two ways that 3-phase machines can be wired. If not, you have a wiring problem upstream the connection to the cluster or the cluster itself. Quality Brushless Exciter Synchronous Generator manufacturers & exporter - buy 120kw / 150kva Brushless Exciter Synchronous Generator Three - Phase 50hz from China manufacturer. Optimum reliability is obtained by use of a rectifier equipped only with diodes. The AVR provides closed loop control by sensing the alternator output voltage at the main stator windings and adjusting the exciter stator field strength. AC generators. The voltage regulator is internal, and there are no other wires that need to be connected to your electrical system. The basic theory is that if you pass a strong magnet over a wire, the wire will generate electricity. If a rectifier shorts, a very high current flows through the associated exciter armature winding thus causing excessive heating and probable failure of the exciter. The diode trio is. make sure your charging wire from alt to battery is sufficient. An automatic voltage regulator (AVR) is a electronic device for automatically maintaining generator output terminal voltage at a set value under varying load and operating temperature. In a 1 wire setup the + wire goes to the point where the accessories draw their power. Black goes to ground. Thanks for the reply,, The alternator only has two connections one is the heavey battery one, and the other is the exciter wire i have fed my own connection from the ignition flick switch to a. Th excite wire into your alternator should get +12 (battery voltage) all the time the key is on. Want to make Alternator Exciter Warning Light Bronco Tech Can't remember the wiring diagram I used. SENR4794-06 January 2002 Systems Operation Connection Diagrams: SR4 and SR4B Generators, Voltage Regulators, Options. and try also to test your exciter diode, the alternator it has 4 or 6 e-diode try to check. maintenance & nonperformance. N: is the sense wire. These diodes are connected in the shape of a normal three phase rectifier with six diodes (sometimes twelve diodes are used). Cut both black/orange wires close to the alternator, allowing enough length to attach a splice (approximately 2 to 3 inches). my question is how do i know if i need one or not?? i'm using an american auto wire kit, and the engine/trans came out of a 73 chevy van. Rotor / Armature – This is the moving component that produces a rotating magnetic field by any one of the following three ways: (i) induction (ii) permanent magnets (iii) using an exciter. My alternator does work but only when you make a connection from the battery to the blue exciter wire on the alternator. Use these convenient harnesses to adapt one style alternator in place of another. ' The diode in the exciter wire is to prevent electricity from flowing 'backwards' to the ignition switch, because the right diode only lets electricity flow in one direction- From the Igntion switch TO the alternator, but not the reverse. On industrial systems we always used either an oil pressure switch, or ignition lead for the #1 exciter. • S is used by the regulator to monitor charging voltage at the battery. Nothing above 25Ω works so I'm using a 20Ω resistor. There may be a feedback to the ignition switch from the voltage regulator field exciter wire. /October 2017 Issue of Good Old Boat. Be sure you have the indicator wired as in the diagram. The voltage regulator can maintain 14 volts at the “remote main junction,” if we give the regulator opportunity to read “voltage-sensing” from the junction. Below is a picture of a diode I purchased at Radio Shack several months ago that is 200 mA. A failed zener diode lead usually conducts both ways, just like a wire, so alternator does not get excited and no longer charging battery. my alternator has one post,for the main power wire, and a twin point plug like an injector plug (see pic) please excuse the scrappy alternator lol :). AC generators Portable Generator pdf manual download. I'm all ready running an alternator (2wire) with a yellow diode wire from the alt to the starter solenoid for the excitor the diode because it ran after shutting of the key. Systems Operation 30SI Series and 34SI Series Alternator Normal Operation The alternator is a brushless, heavy-duty integral charging system. Once the engine is running and the alternator is generating power, a diode feeds the field current from the alternator main output equalizing the voltage across the warning indicator which goes off. 1 - From the Ignition Fuse #15 - wire. Check wiring for loose connections and diodes for looseness in frame. Diodes in the network keep current from backfeeding into unwanted circuits. The alternator is a three-phase 8 pole synchronous generator in star connection. single phase 220v st-3 copper wire alternator with cheapest price 1. basics about alternator. The wire itself to the seperate excite terminal on the alternator has good voltage - but internally it may not. Voltage induced in the exciter rotor, rectified by the rotating diodes, magnetises the rotating main field which induces voltage in the main stator windings. Charging System Basics. Took a break from the alternator problem for a few weeks. i have a gm 10/12 si alternator on my buggy that has been working fine, but long story short i had to rewire some things because of an issue with my kill. Glass banding is inspected and repaired, if necessary. Simple, One-Wire Hook Up. The diodes fail by either going open circuit or short circuit. This helps the alternator to start loads with high starting currents. Insulation is cleaned or replaced. GM Internally-Regulated Alternator Wiring Harness. Replace or adjust V. Alternatively, a four pole alternator could be constructed in which case the rotor would have four field coils. If you try to use the same switch for ignition and the #1 field (exciter) wire without a diode, the engine will continue to run when you turn the key OFF. voltage at the B+ terminal (G) and is supplied to the. Secondly, No factory Delco alternator has ever been produced as a 'One Wire'. This is the configuration used in automotive alternators. If you use a diode, connect it to only allow current to flow towards the alternator. The wire itself to the seperate excite terminal on the alternator has good voltage - but internally it may not. Here we are talking about large scale alternators of generators are used in power plants and other heavy applications. Electronic Voltage Regulator. Would you please post a picture of the back of the alternator you received? 2. The battery is permanently connected to one side of the rectifier and the exciter and regulator are connected to the other. DC power→ electromagnets→ Rotation → Rotating Magnetic field. Make sure that purple wire is dead with key switch off, Hot with keys witch on. The charging system in most cars will generally produce a voltage between 13. Charge light diode - posted in Electrical: Ive had some charging issues lately and found that the charge light in the dash had blown and not exciting my alternater diode and therefore not charging my battery. Post by lummert » 19 Nov 2014, 17:51 I had a bad main head light relay that caused the overdrive light to come on, head lights not come on, and intermittent stalling that was cured by replacing the relay. The reason is lack of Residual Magnetism. The red harness wire usually would go to the + post on your starter. PowerRail, an M-1003 Quality Company offers a complete line of Re-Manufactured Main Generators and Alternators with a complete line of New parts & components that are mostly Manufactured in our facilities and/or Re-Manufactured in North America to offer Quality and Service at a competitive price. Is that OK?. To identify an alternator system, inspect wire or wires that come from under or behind the blower housing. The picture shows the common ground point for the battery & extra 3G alternator ground wire as described above in paragraph 2. Go to Chart 2 on page 4 to troubleshoot OVCO. Remedy this issue by installing a diode #276-1661 from Radio Shack, inline with the alternator exciter wire. Wiring the 3 wire alternator #95512 Fri Apr 28 2006 11:22 PM: The diode in the exciter wire is to prevent electricity from flowing 'backwards' to the ignition. However, here is the weird part: With the EXC wire disconnected at the alternator, I can put a test light on the end of the wire and to the battery negative. This isolates the alternator from the ignition when the switch is in the OFF position. The Painless harness may have a diode or resistor in the harness hidden somewhere if it is not using the dash light. The yellow exciter wire comes plenty long enough to reach from the alternator back to the ignition switch or ignition coil, so there is no wire splicing. The main terminal goes to the Alt PWR and it is linked to the plug on the side of the alternator. Although some generators are still produced with brushes and sliprings to provide the rotor current as illustrated in Fig. A 3-phase brushless alternator may have 4 or 6 diodes on the rotor for the exciter output in addition to the diodes that may be on the stator. Had lunch with Larry C. part of the "exciter" circuit for the alternator - this circuit creates a magnetic field to allow the alternator to produce voltage. TIP: A second alternator on the main engine, combined with a larger battery bank and inverter, could be an alternative for a generator. I like to use an idiot light wired into the exciter circuit so I'll know if the battery is charging but I've bought cars with a 3 wire alternator and no exciter wire going to ita bare plug with nothing plugged into it. Replaced battery and alternator and still not charging. non inductive amp meters are shunt voltmeters. The control lamp, shown between the plus-diode and the battery seems unimportant. Yes No Regulator responded to overvoltage condition. Is this diode normally mounted on the alternator, or just wired in-line with the wiring harness? Mine is just wired in-line with electrical terminals, which doesn't look very OEM. Don"t forget to put a diode in that line or switch it separately from the coil. Here's why: most Delco Remy alternators have "Auto Start" capability that doesn't require a separate wire to excite the alternator to charge. This is usually based on a chevy alternator type and only requires a battery wire connected to the battery terminal. The following diagram shows the wiring for a typical 3-wire alternator connected to our Infinitybox system. Most people solder the diode in the wire someplace and it's a done deal. The diode keep the alternator from feeding back through the exciter wire to the ignition so the tractor wouldnt keep running when shut off. Made sure battery terminals were good. Bosch 80 and 90-amp alternators use 14 diodes. in alternator output check. Diode rectifier 3. The GND brush is grounded with the brush mounting screw. 5 volts then it will kick back to around 13. excitation. Checking the ‘lamp’ lead to the alternator is the most critical check. Rotating Diodes bridge. Solder a 2" length of wire to the anode of diode and heatshrink. 3 V drop between the battery and the green wire (exciter) when the key is on. - Check the connection of the voltage reference to the AVR - Faulty diodes - Armature short-circuit The alternator builds up but its. Want to make Alternator Exciter Warning Light Bronco Tech Can't remember the wiring diagram I used. I have the stock 85 alternator. The one that is currently on the boat that needs to be replaced is a 3 wire. If I understand correctly, the diode should be 200 milliamps (or 20 amps). If your alternator has the PLIS connection, the ignition wire goes directly to the “I” terminal without the need for extra resistance. Next, I took my common automotive test light and connected one end to the coil + and the other end to the alternator. If it’s below that, charge the battery with a battery charger before you conduct the test. The rectifier hub includes liberally rated diodes. If you are planning on using the alternator for any project use, you can consider changing to Schottky diodes, FET based rectifiers and/or raising the output voltage. Better to make it bigger than what most stock size are. Below is a picture of a diode I purchased at Radio Shack several months ago that is 200 mA. Diode rectifier 3. In fact, the alternator may fail to charge if that light bulb is burned out. This Prestolite drawing indicates the "free" wire leaving the regulator is the excitation lead, which I would have thought meant it connecting to the wire from the warning light. Post by lummert » 19 Nov 2014, 17:51 I had a bad main head light relay that caused the overdrive light to come on, head lights not come on, and intermittent stalling that was cured by replacing the relay. Typically the exciter wire goes to the alternator rotor through a diode and resistor and comes from the ignition via the idiot light. Also, make sure all wiring is good especially from the pcm to the alternator. Thanks for the replies so far guys. So if you have a bad connection for the alternator warning wire, the alternator won't start charging right away. These alternators have been widely used on marine, agricultural and industrial applications such as boats, tractors and forklifts. Consult the owner's manual for the specifics about your vehicle's alternator brand. The 14 Circuit wire harness is our most popular kit. The current generated by the exciter must be rectified to be injected into the polar wheel of the main alternator, it's the job of the rotating rectifier. Route the other end to the generator / alternator. is rectified by the exciter diodes (D) (producing battery. I have connected the lead from the separate alternator terminal to the relevant wire on the dash 2 but the light does not go out. 3: Checked continuity of exciter wire to alternator from pin 12 (OK). Stupid-simple alternator If you can run the heavier cable to your bat+ terminal you can change the exciter wiring harness just as easily. I have an 'alt exciter' wire in my harness, is this what the N terminal needs? I believe the exciter is just a +12v wire. When the key is switched off, no power is coming from the ignition terminal into the exciter wire. MECHANIC's DIODE, 3 amp diode with wire leads and butt connectors. i'd google your alternator to see if there is a diagram or something to clue you in to which wire goes where. Aternator/Exciter Wire maintenance & nonperformance Aternator/Exciter Wire - Turbobricks Forums Turbobricks Forums > Mechanical > maintenance & nonperformance. Once the engine is running and the alternator is generating power, a diode feeds the field current from the alternator main output equalizing the voltage across the warning indicator which goes off. chapter 3 generator excitation and voltage control 3. If it is connected correctly, the alternator is backfeeding to the ignition and you need to install a 50v 6a rectifier diode in the exciter wire, like this one:. Includes Universal Welding Brackets for your own custom application. The drawback of this arrangement is that if the warning light fails or the "exciter" wire is disconnected, no excitation current reaches the alternator field windings and so the alternator, due to low residual magnetism in the rotor will not generate any power. Note meter reading. With our how-to troubleshoot alternator charging systems article, you can Make sure your vintage Mustang’s battery is charged up and ready to go - Mustang Monthly Magazine. 6 when running, suspect bad diode 3. My question is can I bolt on a 1 wire alternator and be back in business by capping of the exciter and 12 volt wire that the 3 wire unit utilizes?. GM usually wired this small red wire to the battery cable connection on the starter, but most hot rodders just connect it to the output of the alternator (the screw terminal that the big red wire connects to). • S is used by the regulator to monitor charging voltage at the battery. The simplified equivalent circuit is shown in Figure 3. Avr controls the Output voltage by controlling exciter field current. 5 v) when connected. Mathematical Analysis of Zener Diode Regulating Circuit. TIP: A second alternator on the main engine, combined with a larger battery bank and inverter, could be an alternative for a generator. 12 Wire Diesel Or Engine Permanent Magnetic Alternator Synchronous Generator(id:9165879), View quality permanent magnet alternator generator, permanent magnet synchronous generator details from Jiangsu Farrand Alternator Technology co. Once the engine is running and the alternator is generating power, a diode feeds the field current from the alternator main output equalizing the voltage across the warning indicator which goes off. in case of alternator we want some current like 4600 A we can't get directly so we use exciter that exciter field winding will transfer the flux to alternator winding. flows through the alternator excitation resistor (N) to. 7 volts, but even if we halve this and use 0. 8 = 22500wh. Alternator exciter wire without lamp Hi guys, My Acewell 7659 dash uses its own power wire to monitor voltage levels and will bring on the battery light at whatever programmed voltage I input. The exact voltage depends on your alternator and wiring resistances but it's not uncommon to see a 0. Because the alternator is connected to (and critical for) other vehicle systems, any mechanical auto problems can have an effect on its function and have an effect on diagnosing car problems. The wire supplying the field current is often referred to as the "exciter" wire. Blue wire (F) and dark brown (4) should be soldered or spliced together. The alternator with BSD interface can communicate with the engine control unit (DME/DDE). A wire called an exciter generates the voltage needed for an alternator to start working once a vehicle is started. Alternator turning, electricity comes out of the terminal that the exciter wire connects to (that is one reason the battery light works the way it does) and runs to the coil terminal (15), turn off the ignition and because the alternator is still sending power to that terminal, the engine keeps running. A diode is sometimes needed in the exciter wire, to keep the alternator from sending power to the ignition system, and having the engine run after you turn off the key. The rotating rectifier and diodes takes energy produced by the exciter, "rectifies" the energy, resulting in DC supplying the rotating field and finally alternator output is generated. But most. This residual magnetism allows the exciter rotor (armature) to produce AC voltage even when the exciter. Lets work on the 12v side first. It stands to reason that the ground side handles just a much current, so it needs to be 4 gauge too. I have an 'alt exciter' wire in my harness, is this what the N terminal needs? I believe the exciter is just a +12v wire. The reason is lack of Residual Magnetism. Checking the capacitor. The alternator positive connection should be only by this path, directly off the positive pole on the starter solenoid. It's job is to indicate the generator function on the dashboard. The newer versions have fixed the low RPM problem, so I am using a 1-wire Delco alternator on my 46. 4 volts while the engine is running. If your tractor does not shut off after you turn the key off, this is probably the cause and you will have to either install a diode in that line or find another spot to attach it. alternator does not charge when the car is first started 2. storefront on EC21. This guy is asking if an alternator can be disconnected and still run engine. Understanding the Alternator • Four wires connect the alternator to the rest of the charging system. supply and rated frequency around 50 until 250 Hz. Voltage regulator is transistorized. Speedway Motors also sells the harness with diode for about 18 bucks, another way to go if you like, hope this helps, Trev. Prepared by : Lalit Chavda(u15ee056) Veeresh Vannala(u15ee057) Purushottam Kumar(u15ee058) Rakesh Raju(u15ee059) Tejaswi Prasad(u15ee60) TYPES OF ALTERNATOR & ITS APPLICATION S. • Has diodes that full wave rectify the three-phase (three separate voltage) exciter armature AC current to DC before it enters the main rotor. 25 x 1N4004 400V 1A Axial Lead Silicon Rectifier Diodes. /October 2017 Issue of Good Old Boat. • Turn ignition key to the on position. There is a cheap conversion kit that plugs directly into your original wiring so you don't need to mess with anything. 1 - From the Ignition Fuse #15 - wire. it has an HEI ignition. Then on the stud on the back there is a positive that runs to the battery and another that runs to the junction block on the firewall. However, here is the weird part: With the EXC wire disconnected at the alternator, I can put a test light on the end of the wire and to the battery negative. Scroll to the bottom of the page to order _____ Delco SI to CS - Part W1201 Used to connect an early style Delco 10SI or 12SI internally regulated wiring harness to the later styl. The exciter has stationary field coils and a rotating armature (power coils). Claw-pole rotor - Coil of wire wrapped around iron - Main alternator and Exciter. It's a steady 13. ' The diode in the exciter wire is to prevent electricity from flowing 'backwards' to the ignition switch, because the right diode only lets electricity flow in one direction- From the Igntion switch TO the alternator, but not the reverse. There is no net voltage drop across the bulb so it does not light. A 3-phase brushless alternator may have 4 or 6 diodes on the rotor for the exciter output in addition to the diodes that may be on the stator. (That's why it's always so darn hot. The diode keep the alternator from feeding back through the exciter wire to the ignition so the tractor wouldnt keep running when shut off. Other end at alt. The diodes cause a voltage drop before the 13. Voltage induced in the exciter rotor, rectified by the rotating diodes, magnetises the rotating main field which induces voltage in the main stator windings. I've been through ALL my wiring on my 210 and have found nothing related to the alternator that's out of the ordinary. Claw-pole rotor - Coil of wire wrapped around iron - Main alternator and Exciter. 8 if for AGM batteries, that is 18000/0. a very slight voltage drop occurs. If the alternator isn’t putting out enough current to keep up with the electrical loads that are placed upon it, or the charging voltage is low, don’t automatically assume the starter or alternator is bad and needs to be replaced (unless you’re bench testing the unit out of. The alternator uses electromagnetism to generate electricity for the car. although the regulator fitted to mine is a 12v one. The diodes in an automobile's alternator serve the same function as a one-way check valve does in a hydraulic system. Re: SA-200 Generator/Alternator Originally Posted by denrep The reason for suggesting the lamp is that the OE exciter circuit is designed to have a resister, lamp, or diode in it. This voltage is called the exciter input voltage. If I hook the 3G exciter wire to the I terminal, should it be on the solinoid/starter side or coil side of the diode, or should I get a separate diod for the alternator exciter wire? If I wire it with its own diode, it will only get power to it when I am cranking the engine. It goes to the regulator (may be inside the alternator) which then controls the rotor field current. If the exciter windings (Rotor and stator are fine and the rectifier diodes + any surge suppressors are all OK, the AVR should be able to generate the required voltage: Check the current going. By installing this diode you have introduced a one way gate in which voltage can only flow to the alternator and not vice-a-versa on the exciter wire. The main exciter has a stationary field and a rotating armature directly connected, through the silicon rectifiers to the field of the main alternators. Page 3-240 Is my alternator TOAST, if so why. This types can replaced for commutator on the d. Bosch 80 and 90-amp alternators use 14 diodes. If you try to use the same switch for ignition and the #1 field (exciter) wire without a diode, the engine will continue to run when you turn the key OFF. My battery light came on. MECHANIC's DIODE, 3 amp diode with wire leads and butt connectors. The Subaru ECU has an “Alternator charge Cut-out Function” that is controlled by the electrical load on the vehicle, the vehicle has an alternator with a 3-pin plug (C=computer control: S=Battery sense: L=Warning Lamp). There is no net voltage drop across the bulb so it does not light. This is usually based on a chevy alternator type and only requires a battery wire connected to the battery terminal. make sure your charging wire from alt to battery is sufficient. The I terminal of the switch also goes to the coil, so it has to go off when the key is turned off. the main power one and one called the exciter wire. Hello, does anybody know exactly where the exciter wire gets hooked up to on the ignition switch? I hooked it up to the red wire off the switch, but I'm having the same issue - truck continues to run after I turn the Ign. The electrical system in an automobile is said to be a 12 volt system, but this is somewhat misleading. Electronic Voltage Regulator. The 3-wire hook-up is straight forward with one wire going no farther than the alternator itself. Re: Alternator exciter wire #1 78 CJ The 15 Ohm wire was used when there was no 'Idiot' light, or with a light that didn't create enough resistance to excite the regulator. They have to perform some "magic" with internal voltage-drop or rpm detection; and some days, magic just doesn't work, which is why no manufacturer would ever use a 1-wire alternator. alternator does not charge when the car is first started 2. The other terminal is the exciter. Repair vehicle ignition circuit wiring as necessary. This Prestolite drawing indicates the "free" wire leaving the regulator is the excitation lead, which I would have thought meant it connecting to the wire from the warning light. It does not have voltage 1 Volt. Over the years many farm tractors have been fitted with the 10SI alternator. These won't charge at all until you give it a constant +12V. My battery light came on. You have an open circuit in the exciter wire going to the two wire connector, or no voltage to the main wire on the rear of the alternator. If your alternator stops generating current when the ignition is on and the engine is running, you back to the first scenario. Re: Alternator exciter wire #1 78 CJ The 15 Ohm wire was used when there was no 'Idiot' light, or with a light that didn't create enough resistance to excite the regulator. This system. Voltage induced in the exciter rotor, rectified by the rotating diodes, magnetises the rotating main field which induces voltage in the main stator windings. High voltage drop between red alternator positive (+) wire and starter due to broken, loose, or corroded wires. Hi folks, I have been reading old posts on this and I think I got: 1. 13 Car Buying Mistakes - How Auto Dealerships rip you off - How to buy a Vehicle from a Car Dealer - Duration: 8:00. Alternatively, a four pole alternator could be constructed in which case the rotor would have four field coils. 8 PNK/BLK 139A thru the splice and out wire 139G (continued to figure E9). An alternator is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current. I don't plan on running the ammeter (voltmeter sometime down the road). The alternator does put out so obviously the exciter wire is not needed, but would it prevent having to rev. Electrical connections are improved. Faulty regulator or faulty alternator windings. OR, look for a tag or label with the alternators model number. Th excite wire into your alternator should get +12 (battery voltage) all the time the key is on. Brushless excitation. The system produces DC current for electrical systems. If you use a diode, connect it to only allow current to flow towards the alternator. The I terminal of the switch also goes to the coil, so it has to go off when the key is turned off. Open circuit in diode or connection. 25 x 1N4004 400V 1A Axial Lead Silicon Rectifier Diodes. AVR , sensing the out put voltage from main armature , compares it with the set value and then changes the exciter field current. Use of Alternator The power for the electrical system of a modern vehicle gets produced from an…. An automatic voltage regulator (AVR) is a electronic device for automatically maintaining generator output terminal voltage at a set value under varying load and operating temperature. Speedway Motors also sells the harness with diode for about 18 bucks, another way to go if you like, hope this helps, Trev. An alternator consists of a rotor, stator, rectifier, housing, and shaft. Also for: Uci 224, Uci 274, Ucm 224, Ucm 274, Ucd 224, Ucd 274. The first item to check would be the alternator. Re: How to test alternator diodes? I tried dismanteling the diode plate with the alternator still in place but one screw was rusty and I wrecked it. basics about alternator. The D+ voltage will drop if it is an 'exciter diode'. They are connected to the stator windings. Integrated Electric developed a variable speed DC Alternator for coupling with Diesel engine as a source of DC auxiliary power. 5 to 2000kVA Stamford Tech Brushless Alternator, Three Phase and Four Wire Deutz 10kw-100kw Power Generator, Deutz AC Three Phase Series Electric Generator with 10-100kw and so on. in alternator output check. Have you tried touching a hot wire to the lose white wire with the engine running to see if it shows a charge on the gauge? I take it the heavy cable attached to the bottom of the alt. Alternator, Brushless Alternator, Stamford Alternator manufacturer / supplier in China, offering 6. I was told by technician that the small black wire on the spade goes the the exciter of the generator and when I turn the ignition swich on this wire should have voltage but. What is an exciter and how does it work?. One wire systems are just a cop out for people that do not know how to wire equipment. 10SI Alternator Wiring. Start studying Unit 3. Hello, does anybody know exactly where the exciter wire gets hooked up to on the ignition switch? I hooked it up to the red wire off the switch, but I'm having the same issue - truck continues to run after I turn the Ign. 6 amps through to the alternator circuit board. alternator page product information and service manual 33/34 si heavy duty brushless. Alternator charging issues & blue exciter wire The last couple years my alternator had no voltage at start-up, but if I revved the engine a few times the voltage came up to about 13. However, here is the weird part: With the EXC wire disconnected at the alternator, I can put a test light on the end of the wire and to the battery negative. Voltage drop between the alternator positive is negligible and the alternator case is has a negligible drop. Optimum reliability is obtained by use of a rectifier equipped only with diodes. The kits that I offer use a new 63 amp Delco 10SI cloned alternator. generators without referring to their field system and excitation. *NEWER 22SI HAS BEEN INTRODUCED, IF PLUG RECEPTICLE HAS 4 PIN TERMINALS SEE BACK. You can as a quick fix insert a 3 amp diode in this wire with the line in the direction of the alternator. Took motor home for a drive and the alternator failed again. Continue test. 8 = 22500wh. The alternator’s sole purpose is to charge the car’s battery and work alongside the battery to power the electrical components of the vehicle. Hi I usually post on the 49/54 forum. 118-124) The diodes inhibit self excitation as the alternator voltage needs to exceed two diode voltage drops in order to self excitation. 12 Wire Diesel Or Engine Permanent Magnetic Alternator Synchronous Generator(id:9165879), View quality permanent magnet alternator generator, permanent magnet synchronous generator details from Jiangsu Farrand Alternator Technology co. The alternator will attempt to keep 14. Make sure to install the diode with the line closest to the alternator. I noticed many threads saying its a diode in my cluster. Optimum reliability is obtained by use of a rectifier equipped only with diodes. and that would be a large load too. The 10SI alternator wire harness with the DA-plug makes it a snap to wire up the alternator. For the Delco alternator you just have to bypass the voltage regulator and remove the exciter diode shown in this drawing from the second write-up I listed above: I used this diagram for the wiring from the same write-up, but did not add the resistors shown:. Repair vehicle battery circuit wiring as necessary. As the alternator needs to 'see' a current on the exciter terminal I have no option but to replace the bulb with a low value resistor. Thanks for the reply,, The alternator only has two connections one is the heavey battery one, and the other is the exciter wire i have fed my own connection from the ignition flick switch to a. This completes the removal of the old alt. Bosch regulators are transistorized and integal with alternator. In this manner, an electro magnet is created, because DC current/voltage is applied to this coil, current flows thru it, and they create a magnetic field. The diodes cause a voltage drop before the 13. How does a lead acid battery charger (or car alternator) know when to switch to trickle charge? I can understand it noticing a drop in charging current if the battery is on its own, but what if a random. BEARING IN 10SI RETROFITTING OLD STLYE DELCO REMY REGULATOR TO NEW STYLE DELCO REMY 50VR REGULATOR. I don't plan on running the ammeter (voltmeter sometime down the road). • Has diodes that full wave rectify the three-phase (three separate voltage) exciter armature AC current to DC before it enters the main rotor. part of the "exciter" circuit for the alternator - this circuit creates a magnetic field to allow the alternator to produce voltage. If you see higher readings, chances are the alternator is good (more sophisticated testing equipment is needed to detect an open or shorted alternator diode). Is this where I need a diode or resistor? Edited June 15, 2010 by Kris. The old connector is no longer used and can be discarded. Answer / hari for switching purpose we r using exciter in alternator. Mathematical Analysis of Zener Diode Regulating Circuit. These diodes are connected in the shape of a normal three phase rectifier with six diodes (sometimes twelve diodes are used). The wiring on it is actually quite simple; Large white wire runs from the battery to positive on the alt. This is the exciter to turn the alt.