I am trying to understand this. When a induction motor is driven PWM Drives, the current is not chopped-up but filtered into nice sinosoidal wave because of inductive nature of motor.
I understand in a simple circuit shown below--when the voltage is first applied, the current slowly ramp up slowly.
Now if I make voltage source to 0, the current will ramp down to 0.
Now instead of making voltage source 0, I open a switch the switch: the current would not ramp down , but drop suddenly.
so I think in motor drives(PWM), second case is happening. So why does motor current not dropped to zero?