Due to the heavy current flow in Motor stator winding and MOSFET, there is a possibility of damage beyond certain temperature, so we have to cool it to maintain below optimal temperature.
This cooling is done in the price of reduced range, yeah we're using the power for cooling equipments from same battery, better we have to use the temperature sensor data to ON/OFF the cooling equipments, if we kept the cooling equipments always ON means, resulting in low range of eBike.
Which equipmets need cooling :
Mosfet, due to high speed switching / regenerative braking / high current flow, the temperature increase suddenly, so we must need cooling.
Motor stator coil, as we supply the power in the stator coil, due to copper loss/eddy current loss, stator coil temperature also increase suddenly, so we have to keep this also cool.
Offtopic:
High speed (above 40 kmph) reduce the range of eBike so it drain the battery faster, also it increase the copper losses at high rpm, so if we kept eBike in optimal speed means, More range, safety to our equipments too without the need of cooling.
Cooling technique for Mosfet :
Air cooling - Simply placing a CPU fans in controller box keep the temperature of circuits under control or within the preset level, Fan is fitted in heatsink, or we have to increase the surface area of heatsink, that is we can easily increase the surface area by placing aluminiu rectangular metal pack, so due to large surface area it grab more heat from the heatsink, and keep the circuits cool.
Water cooling -
For water cooling, we need to remove heatsink and place the water cooling small equipments, and we have to keep the water flow.
Cooling technique for Motor :
Air cooling using CPU Fan - Put a hole in motor case/shield and place the CPU fans there, so it reduce the temeprature of stator coils.
Air cooling using Mini compressor - Chinese made mini compressors are available, they're operating at 12V 150W, which are mainly created for small refrigerators in car for keeping beer cans cool, we can use this mini compressor to generate cool air (in range of 20 degress celcius), so it cool the coils.
Air cooling using mini compressor with Vortex Cool Tool Cold Air Gun Spot Cooler - Spot coolers are popular, as these cool they cool in rapid manner.
Water cooling - creating a water path, and run by a small pump like we do in cooling engine in car.
This cooling is done in the price of reduced range, yeah we're using the power for cooling equipments from same battery, better we have to use the temperature sensor data to ON/OFF the cooling equipments, if we kept the cooling equipments always ON means, resulting in low range of eBike.
Which equipmets need cooling :
Mosfet, due to high speed switching / regenerative braking / high current flow, the temperature increase suddenly, so we must need cooling.
Motor stator coil, as we supply the power in the stator coil, due to copper loss/eddy current loss, stator coil temperature also increase suddenly, so we have to keep this also cool.
Offtopic:
High speed (above 40 kmph) reduce the range of eBike so it drain the battery faster, also it increase the copper losses at high rpm, so if we kept eBike in optimal speed means, More range, safety to our equipments too without the need of cooling.
Cooling technique for Mosfet :
Air cooling - Simply placing a CPU fans in controller box keep the temperature of circuits under control or within the preset level, Fan is fitted in heatsink, or we have to increase the surface area of heatsink, that is we can easily increase the surface area by placing aluminiu rectangular metal pack, so due to large surface area it grab more heat from the heatsink, and keep the circuits cool.
Water cooling -
For water cooling, we need to remove heatsink and place the water cooling small equipments, and we have to keep the water flow.
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Cooling technique for Motor :
Air cooling using CPU Fan - Put a hole in motor case/shield and place the CPU fans there, so it reduce the temeprature of stator coils.
Air cooling using Mini compressor - Chinese made mini compressors are available, they're operating at 12V 150W, which are mainly created for small refrigerators in car for keeping beer cans cool, we can use this mini compressor to generate cool air (in range of 20 degress celcius), so it cool the coils.
Air cooling using mini compressor with Vortex Cool Tool Cold Air Gun Spot Cooler - Spot coolers are popular, as these cool they cool in rapid manner.
Water cooling - creating a water path, and run by a small pump like we do in cooling engine in car.
In Progress, Will Update ...!
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