Hi
I am looking to build an AC voltage regulator for motorbikes. I have posted a thread here.
http://forum.allaboutcircuits.com/threads/motorcycle-voltage-regulator-ac-regulation.129921/
Alec, who is also a member of this forum, has helped me to some extent, but the issue is still unresolved. I summarize the discussions below.
Most of the bikes have dual stator coils for single phase AC generation. One coil supplies AC voltage which is rectified/regulated to 14.4V for battery charging and other electrical system (excluding Head Lamps and Tail Lamps). The second coil is connected in parallel to the lamps and an AC regulator circuitry. Please see the diagram below for better understanding.
The DC regulator and the AC regulator are housed in a single unit, as shown.
The Chinese unit has a larger cavity for the PCB than the OEM unit which means the latter has fewer components. Both units barely get warm on operation. I have built the Chinese circuit which works fine, but according to my experience they are not reliable because they fail after sometime. Here is the schematic of the Chinese circuit for reference.
I want to build something reliable with minimum components, like the OEM. I failed to rip off the OEM unit but was successful enough to find two SCRs BT151 which were not even attached to the body (means they didn’t required heatsink).
The inductance of the coil is 1.635mH and resistance 1.2Ω.
Without regulator, the output is 7V RMS at idle and 75V RMS at 6000RPM.
With OEM regulator & no load, the output is 7V RMS at idle and 12V RMS at 6000RPM.
With OEM regulator & lamps on, the output is 6V RMS at idle and 12.1V RMS at 6000RPM.
All measurements with a moving coil voltmeter.
I have tried following circuits but could not get the desired result i.e. 12-14V RMS.
The triac got hot at idle, so I could not get proper reading at 6000RPM.
The zener and the darlington were very hot, D4 was hot..output was 12.2V at 6000RPM with lamps on.
The SCR was hot and output was 7.5V at 6000RPM with lights on.
Not yet tried this.
I shall appreciate if anybody can help me out. I have attached the asc files of all the schematics.
I am looking to build an AC voltage regulator for motorbikes. I have posted a thread here.
http://forum.allaboutcircuits.com/threads/motorcycle-voltage-regulator-ac-regulation.129921/
Alec, who is also a member of this forum, has helped me to some extent, but the issue is still unresolved. I summarize the discussions below.
Most of the bikes have dual stator coils for single phase AC generation. One coil supplies AC voltage which is rectified/regulated to 14.4V for battery charging and other electrical system (excluding Head Lamps and Tail Lamps). The second coil is connected in parallel to the lamps and an AC regulator circuitry. Please see the diagram below for better understanding.
The DC regulator and the AC regulator are housed in a single unit, as shown.
The Chinese unit has a larger cavity for the PCB than the OEM unit which means the latter has fewer components. Both units barely get warm on operation. I have built the Chinese circuit which works fine, but according to my experience they are not reliable because they fail after sometime. Here is the schematic of the Chinese circuit for reference.
I want to build something reliable with minimum components, like the OEM. I failed to rip off the OEM unit but was successful enough to find two SCRs BT151 which were not even attached to the body (means they didn’t required heatsink).
The inductance of the coil is 1.635mH and resistance 1.2Ω.
Without regulator, the output is 7V RMS at idle and 75V RMS at 6000RPM.
With OEM regulator & no load, the output is 7V RMS at idle and 12V RMS at 6000RPM.
With OEM regulator & lamps on, the output is 6V RMS at idle and 12.1V RMS at 6000RPM.
All measurements with a moving coil voltmeter.
I have tried following circuits but could not get the desired result i.e. 12-14V RMS.
The triac got hot at idle, so I could not get proper reading at 6000RPM.
The zener and the darlington were very hot, D4 was hot..output was 12.2V at 6000RPM with lamps on.
The SCR was hot and output was 7.5V at 6000RPM with lights on.
Not yet tried this.
I shall appreciate if anybody can help me out. I have attached the asc files of all the schematics.