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The electronically commutated motors all have a very similar block diagram of the control and drivers. For any of the motors there is some power conditioning circuit that supplies a DC voltage for the drive stage, this may be as simple as a rectifier and capacitor for some of the larger motors or may be a switching power supply to generate a lower voltage for some of the smaller motors. Generally the control is implemented in a microcontroller and that interfaces to the power stage. In the block diagram shown here, gate drive IC’s provide the interface between the power MOS or IGBTs and the control logic.
PTM Published on: 2011-12-14
