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I just came across this German start-up today while searching for lower voltage alternatives. I'm curious to hear the opinions of those with more electrical engineering insight than me.
Extract:
ISCAD describes a paradigm shift: 48 V instead of 800 V and aluminum bars instead of copper coils. Every single bar of the stator cage is supplied by a dedicated power electronics unit. The number of pole pairs can be varied. The result is a virtual gearbox.
Another special feature of the construction is the integration of the power electronics in the motor through which an optimal utilization of the machine volume is achieved.
The company looks to have good credentials and has just started production of its first motors.
I can see some significant benefits in a low-voltage alternative (safety, simpler BMS) especially for DIY builders, but understand the arguments for high voltage (efficiency, weight saving). I'd just like to understand how this approach gets round the problem of I2R losses. I see the motor has an integrated controller, presumably to keep conductor lengths as short as possible. I guess it would also require the battery to be as close as possible to the controller. Comments?
Extract:
ISCAD describes a paradigm shift: 48 V instead of 800 V and aluminum bars instead of copper coils. Every single bar of the stator cage is supplied by a dedicated power electronics unit. The number of pole pairs can be varied. The result is a virtual gearbox.
Another special feature of the construction is the integration of the power electronics in the motor through which an optimal utilization of the machine volume is achieved.
The company looks to have good credentials and has just started production of its first motors.
I can see some significant benefits in a low-voltage alternative (safety, simpler BMS) especially for DIY builders, but understand the arguments for high voltage (efficiency, weight saving). I'd just like to understand how this approach gets round the problem of I2R losses. I see the motor has an integrated controller, presumably to keep conductor lengths as short as possible. I guess it would also require the battery to be as close as possible to the controller. Comments?