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Classic Goldwing Technical Forums
Lighting & Electrical
GL1100 (Standard) - Saving watts through LEDs (Chart)
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<blockquote data-quote="DaveKamp" data-source="post: 213427" data-attributes="member: 5122"><p>There's stress on the stator winding INSULATION. As the voltage goes higher, it's the insulation taking a beating... but to do this, the current must be very low, or nonexistant. If there's any current flow, the voltage falls... because the impedance of the coils make it capable of carrying out only-so-much-current. In hard numbers, if this is a 500w generating system, and operating at 14.3v, that's 34.965A. If that 500w 'sweet spot' occurs at say... 3450rpm, and you spin the engine up to 3450rpm, there will be every bit of those 34.965A flowing out of the coils. If the bike only accepts 2A of charge and 9A of other loads, the remaining 23.965A will be shunted to ground, and turned into waste heat.</p><p></p><p>Voltage, hence stress on the windings, and power consumption, is a function of CURRENT FLOW through the windings. If you allow the current to flow (by giving it either a load, or dissipate it to ground), the voltage will stay low.</p><p></p><p>Since this is a shunt-regulated system, there is ALWAYS current flow... what isn't used by a load (lights, ignition, fan, stereo, etc) is dissipated as heat when it's shunted to ground.</p><p></p><p>Let's say the generating system is rated for 500w. The stator will be developing it's maximum output at all times, and it will require at least that much mechanical power in, at all times, wether you use it to run lights, or charge a battery, or run the fan... whatever you don't use, gets dissipated as waste heat, in the name of keeping the voltage capped at 14.3ish.</p></blockquote><p></p>
[QUOTE="DaveKamp, post: 213427, member: 5122"] There's stress on the stator winding INSULATION. As the voltage goes higher, it's the insulation taking a beating... but to do this, the current must be very low, or nonexistant. If there's any current flow, the voltage falls... because the impedance of the coils make it capable of carrying out only-so-much-current. In hard numbers, if this is a 500w generating system, and operating at 14.3v, that's 34.965A. If that 500w 'sweet spot' occurs at say... 3450rpm, and you spin the engine up to 3450rpm, there will be every bit of those 34.965A flowing out of the coils. If the bike only accepts 2A of charge and 9A of other loads, the remaining 23.965A will be shunted to ground, and turned into waste heat. Voltage, hence stress on the windings, and power consumption, is a function of CURRENT FLOW through the windings. If you allow the current to flow (by giving it either a load, or dissipate it to ground), the voltage will stay low. Since this is a shunt-regulated system, there is ALWAYS current flow... what isn't used by a load (lights, ignition, fan, stereo, etc) is dissipated as heat when it's shunted to ground. Let's say the generating system is rated for 500w. The stator will be developing it's maximum output at all times, and it will require at least that much mechanical power in, at all times, wether you use it to run lights, or charge a battery, or run the fan... whatever you don't use, gets dissipated as waste heat, in the name of keeping the voltage capped at 14.3ish. [/QUOTE]
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Lighting & Electrical
GL1100 (Standard) - Saving watts through LEDs (Chart)
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