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Question:

How to select a field effect transistor for brushless DC motor controller for electric vehicle

How to select a field effect transistor for brushless DC motor controller for electric vehicle

Answer:

The function of the FET in the electric vehicle controller is the switch tube, and the popular point is that the control tube of the variable frequency speed regulation is used;
There are currently no other types of tubes that can replace field effects (at least in price terms, and some people say thick film integrated circuits can be - but is it packaged in a thick film integrated circuit or FET)?
Hello.- * 1, rated voltage of 48 V, the minimum pressure pipe selection should be 2 times of the rated voltage, so that the field effect is greater than, equal to 100 of the tube can be V.- * 2, motor starting current is 5 to 7 times the rated current of the electric vehicle, if the rated load current of 15 A, then the rated current pipe should be above 105 A, can run reliably.- * 3, because the output current of the power tube is larger, can use multiple power tube parallel operation mode. 3 40 A tubes (or other combinations) can be selected, and the type characteristics of the pipe shall be consistent. In fact, the high-power product controller is also used in parallel with multi power tubes.

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