When a sine wave of current is applied to a PMSM motor, I do not much understand how the current flow. Picture1 is the schematic(page 19). Picture 2 shows the sample voltage on the shunt resistor(R5),channel 1 . We can see the positive and nagetive half wave.
My question is , when the lower MOS swtich is on, there is positive voltage on the shunt resistor, but how the negative wave comes? By the freewheeling current flow through the built-in diode in the MOSFET?
My question is , when the lower MOS swtich is on, there is positive voltage on the shunt resistor, but how the negative wave comes? By the freewheeling current flow through the built-in diode in the MOSFET?
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