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Message: <blockquote data-quote="Coulomb" data-source="post: 77274" data-attributes="member: 5687">It can be designed to be bidirectional. Most high power converters are indeed bidirectional.Like the car's motor controller. When regenerating, AC (in this case, 3-phase) from the motor is converted to DC flowing into the battery. When driving, DC power from the battery flows in the other direction through the same power converter to become AC in the motor.It's a matter of arranging the phase of the full-bridge transistors switching in relation to the AC source. There is an inductance between them, and the relative voltage across the inductance causes the power to flow one way or the other, or fall to near zero for coasting.</blockquote>