REGENERATIVE ENERGY FEEDBACK APPARATUS FOR INVERTER AND INVERTER HAVING THE SAME

摘要

PURPOSE: A regenerative energy feedback apparatus for an inverter and inverter having the same is provided to manufacture a small inverter by omitting dynamic breaking resistance. CONSTITUTION: A power supply unit(100) is connected to an input terminal of a convertor(200). An output terminal of the inverter unit is connected to a motor(500). The convertor is comprised of a bridge diode. The convertor rectifies a commercial alternating current voltage of the power supply unit to a direct current voltage. A smoothing circuit(300) is comprised of a capacitor. The smoothing circuit makes the direct current voltage of the convertor smooth. An inverter unit(400) is comprised of 6 switching elements. The inverter unit converts the smoothed direct current voltage to the AC voltage. A restoring energy feedback device(600) is connected between the output terminal of the smoothing circuit and output terminal of the power supply unit. The restoring energy feedback device changes the restoring energy to the AC voltage. The restoring energy feedback device restores the AC voltage to the power supply unit.