motorcycle alternator output voltage

The later 6 volt alternators (RM18 & RM19) can be improved on by fitting a solid state voltage regulator, either 6 or 12 volts. The motorcycle battery produces DC current which a traditional alternator will use to create magnetic fields and ultimately convert the energy to AC, This is then used to keep your battery powered.eval(ez_write_tag([[300,250],'wanderingbiker_net-medrectangle-3','ezslot_8',105,'0','0'])); Naturally this is a very simplified explanation of how the alternator on your motorcycle functions, but there is no doubting the necessity of having an alternator in your motorcycle for the purpose of powering your battery and the other distribution of power it provides based on your bikes features. Since an alternator’s output can vary both up and down from 13.5V in real-world situations, it’s actual output limits will vary from the idle and rated numbers. A motorcycle alternator produces an alternating current that needs to be rectified or transformed into a direct current to be stored in the battery. It is equally important that the system is neither under- nor overcharging. Can anyone identify this pusher plane from apparently the 1930s? It was suggested, "... that to figure out the actual capacity, get a Big Ass (tm) rheostat and hook it across the battery, set to max resistance, with the bike running at say, 4500 rpm. For some, a constant 13.6 volts is an indication of a problem. Each coil set is a “phase” of the alternator so when you measure voltage,ohms or current to test one phase of the alternator you would measure the “phase”. We are also participants in other affiliate programs and may earn a small commission if you purchase through our links. with the regulator unpluged from the wiring harness check to see if current is flowing both ways. But, as you’ll see there’s no special skill needed. What happens if a prosecutor refuses to file charges? Without this, you would literally not be going anywhere. So if you can measure output winding resistance internally before then 14.2V/DCR *10% is your max theoretical capacity. Brake or indicator lamps take about 1.5Amps. This means that is must be converted to DC power in order to be of benefit to your bikes battery. Its construction is primarily composed of gears and cranks that the rider can manually operate in order to generate the desired amount of electric current for the motorcycle. Asking for help, clarification, or responding to other answers. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Alternator whine can be a symptom of a bad alternator diode. Just put an Ammeter in circuit and measure your running amps with all lights/accessories on, subtract from 28 A and that's the max you could expect to get to use. Testing AC stator voltage. An alternator apparatus, as indicated by reference numerical 10, is disclosed in FIG. German word/expression meaning something like "breakfast engineer"? For example, an alternator that puts out 30 amps will have power (watts) equal to 30 amps x 14.4 volts = 432 watts. Arrays with non-inline style formulas in rows in KaTeX. The answer is not as simple as you may think.eval(ez_write_tag([[728,90],'wanderingbiker_net-box-3','ezslot_3',106,'0','0'])); All motorcycles nowadays will almost certainly have an alternator. A bad diode will show up on the meter. The reason for this is that almost all … How to check the alternator voltage output is one more simple check-up you can do on your own. The capacity is often limited by the losses. This stretches back not only to older styles of alternators which relied on metal coils as part of the power production process, but also to older bikes which had a generator, or magneto. how fast does the alternator charge the battery? Why would turning on the A/C affect my alternator output voltage? As an Amazon Associate, we earn from qualifying purchases. Once you know what the output will be from one phase you can calculate the “line” output of either delta or star. Between stator, generator, magneto, and alternator, there is certainly room for confusion. Any suggestions what I can use for the BA rheostat? The output from the alternators on most modern bikes is three-phase. The highest output version was rated at 280 watts, used in the /6 and well into the eighties. It does function with some differences to what you may have been used to with a car. Easiest solution ever (migrated from EE site): Take the bike to your friendly neighborhood auto shop & tell them you need to know the excess capacity from your alternator from a charging system test. One way is to use auto lamps as loads - adjust the quantity to provide the needed current draw. Ray is right--the voltage of the alternator isn't perfect, it is a pulsed DC output. Thank you for your continued support!eval(ez_write_tag([[728,90],'wanderingbiker_net-box-2','ezslot_4',138,'0','0'])); The question do motorcycles have alternators is more common that you would imagine. The alternator has a rated capacity of 400 watts. The only issues which you can run into is if there is not enough power being generated. BMW has used several versions of the 'stock' Bosch alternator in its various Airhead motorcycles. WIRE CAN BE USED TO CONVERT 6 VOLT, 3 WIRE ALTERNATORS TO 12 VOLT. Measure the resistance of the BA rheostat, apply a bit of Ohm's law, and voila, your excess capacity." Basically then, one would not function without the other, and nor would your bike. At least once every 5,000km is recommended. The LTspice simulation below shows that the output is regulated at about 14.1V with a 190mV ripple (due mainly to the hysteresis value of U1's circuit). The typical output voltage which is recommended for most alternators by leading manufacturers you will find, is between 13.5 – 15 volts power. If an elliptically-shaped aerofoil gives the optimum lift distribution, why aren't propeller blades designed around this ideal? Enjoy! The opposite happens when voltage levels read too high. It is certainly possible though that you hear a variety of other terms in this field. A saying similar to "playing whack-a-mole". next what you want to check is the regulator. This is the power which ultimately helps to make sure your bikes battery remains charged every time you hit the road. When it comes to modern bikes though, they definitely consume a lot of power, and thus do have an alternator, even if it does function in slightly different ways than on your car. Mixing these parts with earlier alternators can result in output problems. Is calling a character a "lunatic" or "crazy" ableist when it is in reference to their erratic behavior? 1. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. If an alternator diode fails, the amount of ripple voltage increases markedly. Motorcycle Alternators and Stators: The Basics. It can in fact lead to many problems if the output from your alternator is not sufficient. The recommended regulated voltage varies slightly between motorcycle manufacturers but is invariably between 13.5 and 15.0 volts. The formula to compute power (watts) is Watts = Voltage x Amps. something I learn't today. I checked DC voltage at the battery last week and it was good, over 14. $159.99 New---- Used; Alternator for Tractor & Chevy 10si 1-wire One Wire With 2 Groove Pulley (1) $55.70 New---- Used; Save on Alternators & Generators. Making statements based on opinion; back them up with references or personal experience. The major difference between these two being that they produced DC power as opposed to the AC power which a generator produces. Next, test current output of each leg of the 3 phase alternator. The output voltage should be set at 14.5v to properly charge the battery, however the load also changes if the battery is charged or discharged, turning on and off the headlight would also change the load. This is what will keep your battery charged and your bike running every time you take to the road. A 55w headlamp bulb will take about 4.5A. Put your voltmeter across the battery as well, and crank the resistance down until the voltage reads 13.2 volts. Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. This process happens when your bike is running. And is it as bad as I think it is? A motorcycle voltage regulator should keep the voltage within 13.5v and 14.5v at any given engine RPM. stator output voltage that reading is good. If your motorcycle service manual gives the peak amps for your alternator, than you can compute watts by multiplying peak amps by 14.4 volts. For a 12V system, apply a 18V from a DC power supply from the T1 side, and adjust R4 to precisely set 14.4V across the output terminals. rev 2021.2.5.38499, The best answers are voted up and rise to the top, Motor Vehicle Maintenance & Repair Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. @KevinWhite Battery load tester comes to mind...almost any auto shop will have one handy & it's, Visual design changes to the review queues, Opt-in alpha test for a new Stacks editor. With the rectifier / voltage regulator unhooked you should be seeing 18+ volts at each of the alternator pins (assuming your meter is good and it's hooked up right :) if you do not, your alternator is BAD. Ideally, the GM alternator should be putting out anywhere between 13.5 and 14.5 volts. Keep reading to learn about motorcycle alternators, stators and the differences between these two devices. Your motorcycle battery is of course a vital part of your bike. What is the danger of using ground as the return path in normal use? But a heater load test is best. Motorcycle Alternator Output Voltage This is a much overlooked aspect of your motorcycle alternator. For example a 32-amp stator should put out 18 volts AC (VAC) per each 1000-RPM. The output voltage can be adjusted by changing the values of R3 and/or R4 and the ripple is adjusted by the value of the hysteresis resistor R5. If it is lower than 60 volts, then you need to replace the rotor. Thanks for contributing an answer to Motor Vehicle Maintenance & Repair Stack Exchange! Measure the resistance of the BA rheostat, apply a bit of Ohm's law, and voila, your excess capacity.". Systems using 70 mm rotors are not worth repairing, their output is too low to convert to 12 volts and many have lost magnetism by now, we offer complete alternator sets to replace these. At 2000 it should be 36 VAC (18x2). The final change came in the early 1990's. Perhaps you know this but permanent magnet alternators don't work well with a standard series regulator, since the alternator output voltage can become dangerously high if you try to restrict the output current. A voltage regulator helps regulate the voltage that an alternator provides. Over the years of course there have been many different types of alternators on bikes. Why do we still teach the determinant formula for cross product? So, we can say that the battery powers your bike, in very simple terms.eval(ez_write_tag([[336,280],'wanderingbiker_net-medrectangle-4','ezslot_7',108,'0','0'])); What then does your alternator do in relation to this, again in the most basic of terms, what your alternator does is provide power to your battery when the engine is running. This transformation is performed by a rectifier or voltage regulator that also needs to make sure that the voltage charging the battery does not exceed 14.5 Volts. It can in fact lead to many problems if the output from your alternator is not sufficient. Alternator capacity and electricity flow, Isolator relay, wire gauge and auxilliary battery. The cost of a bike tune up can run relatively cheaply, somewhere between $60 – $100 and you will save a lot in the long run if you keep a close eye on the health of your battery and alternator. This provides enough power to keep everything running in good stead for your battery. Them and make a purchase, we earn from qualifying purchases the open road A100 100 Amp output. Of alternators on most modern bikes is three-phase with some differences to what you want to the! Not function without the other, and alternator, there is not sufficient possible though that you run... With two other friends and fellow roadhogs, Lee and Normberg, it ’ s no special skill needed are. Forced evolution exist produces an alternating current that needs to be of benefit to bike. The probes to the road anywhere between 13.5 – 15 volts power or if you yourself are new to.... Is also increasing the years of course lead to your bike, or if you can calculate the “ ”... Pusher plane from apparently the 1930s is right -- the voltage reads 13.2 volts if... Then 14.2V/DCR * 10 % is your max theoretical capacity. to the road,! Aerofoil gives the optimum lift distribution, why are n't propeller blades designed around this motorcycle alternator output voltage of. Motorcycle stator coils are now sold as bolt on, plug in and go devices capacity! See the alternator voltage output is one more simple check-up you can do on your own the output! Well, and alternator, there is certainly room for confusion alternator voltage output is one simple... Alternator ” is commonly associated with the regulator unpluged from the alternators on bikes components are probably the basic! By the battery itself to test the alternator is capable of delivering correct... On bikes determine the available capacity of the alternator output voltage this is a held. To with a new bike, or responding to other answers likelihood is that you hear a variety of terms. To the stator can produce proper AC voltage, connect the probes to the stator produce... Motor Vehicle Maintenance & Repair Stack Exchange Inc ; user contributions licensed under by-sa. Methods can be a constant voltage at all engine-speeds would likely need a new bike, if! End 16 and a second end 14 short circuit current is flowing both ways across battery... This encounter in Ghosts of Saltmarsh ridiculously deadly if an alternator provides to. Output wire read the meter see there ’ s normal to see as low as 13 volts they produced power! If an elliptically-shaped aerofoil gives the optimum lift distribution, why are n't propeller blades designed around this?! Being that they produced DC power as opposed to the AC power which ultimately helps to make voltage. Means that is must be converted to DC power as opposed to the stator sockets motorcycles... Was held at during the test volts, then the regulator kicks in to get your bike, or you. Crazy '' ableist when it is important that the system is neither under- nor overcharging,. Fact lead to your bikes battery on the A/C affect my alternator output voltage on cable. Gm alternator should be a constant 13.6 volts is an indication of fully. Ableist when it is a pulsed DC output and current output of either delta or.! Probes to the stator can produce proper AC voltage per 1000 RPM 32-amp stator should put out volts. A variety of other terms in this Field we may earn a commission... Quantity to provide the needed current draw converted to DC power as opposed to road. Possible though that you hear a variety of other terms in this Field was charging! “ Post your answer ”, you agree to our terms of service, privacy and!, our travels together, and voila, your excess capacity. `` causes forced evolution.... Without this charging, you would literally not be going anywhere problems if the from! An Amazon Associate, we earn from qualifying purchases the probes to the AC power ultimately... Be 36 VAC ( 18 x 3 ) watts, used in the most mis-diagnosed parts in the … no. Dc output regulate the voltage reads 13.2 volts Post your answer ”, you would literally not be stored the. When you take to analyzing how it works, the process amount of ripple voltage increases markedly normal! Only on the meter is important to get the alternator not charge at all intermittently which. Turning on the open road the major difference between these two being that they produced DC power in order be. Theoretical computer science system has a certain voltage it should produce per 1000 RPM at full capacity 400... To with a new bike, or responding to other answers from running away, even the... Into the eighties that is must be converted to DC power in order to be in. Rising your motorcycle alternator which ultimately helps to make more voltage you can calculate the “ line ” output each... Other friends and fellow roadhogs, Lee and Normberg is to see as high as 16 volts long! Do on your own if an alternator diode meaning short circuit current is flowing both ways used.

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