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use a inverter to change dc to ac or couple it to a ac motor making it a motor generator. Comment: AC motors cannot run on DC since their principle of operation based on induction. There's an exception,however, and thats for Universal Series motor which can run on either AC or DC.
There are compressors with motors designed to run on DC. A compressor with an AC motor can't.
It depends on if the motor is an AC motor, or DC motor. DC motors only run backwards when the voltages get crossed between + and -.
ac motor
DC motors are generally more efficient than AC motors. DC motors have a lower amount of inertial associated with them, making them more efficient to run.