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DRV8308 drive the high speed BLDC

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Hi,

I use the DRV8308 EVM to drive the blower, this motor is 2 poles, and the maximum speed is 50000 RPM. I use the PWM duty cycle control mode(drv8308 EVM GUI) to try this motor. This motor generate a bit more heating. I measure the phase current as the attachment. Is it caused by the low drive current? what's the main reason of this issue?

 


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