MOTOR DRIVING DEVICE AND AIR CONDITIONER INCLUDING THE SAME
First Claim
1. A motor driving device comprising:
- a rectifier to rectify input alternate current (AC) power;
a boost converter to boost the rectified power from the rectifier, and to provide boosted power;
a first capacitor to store voltage from the boost converter;
a first inverter that includes a plurality of switching elements, the first inverter to provide, to a compressor motor, AC power transformed using a voltage across the first capacitor;
a second capacitor to store voltage from the rectifier;
a second inverter that includes a plurality of switching elements, the second inverter to provide, to a first fan motor, AC power transformed using a voltage across the second capacitor; and
a voltage dropper to drop the voltage across the second capacitor, and to provide the dropped voltage.
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Accused Products
Abstract
A motor driving device and an air conditioner including the same are disclosed. The motor driving device includes a rectifier to rectify input AC power, a boost converter for boosting the rectified power from the rectifier, a first capacitor to store a pulsating voltage from the boost converter, a first inverter for outputting, to a compressor motor, AC power transformed using a voltage across the first capacitor, a second capacitor to store the rectified power from the rectifier, a second inverter for outputting, to a first fan motor, AC power transformed using a voltage across the second capacitor, and a voltage dropper to drop the voltage across the second capacitor, and to output the dropped voltage. In accordance with this configuration, the compressor motor and fan motor can be driven, using the same input AC power, even though the motor driving device uses a low-capacitance capacitor.
36 Citations
20 Claims
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1. A motor driving device comprising:
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a rectifier to rectify input alternate current (AC) power; a boost converter to boost the rectified power from the rectifier, and to provide boosted power; a first capacitor to store voltage from the boost converter; a first inverter that includes a plurality of switching elements, the first inverter to provide, to a compressor motor, AC power transformed using a voltage across the first capacitor; a second capacitor to store voltage from the rectifier; a second inverter that includes a plurality of switching elements, the second inverter to provide, to a first fan motor, AC power transformed using a voltage across the second capacitor; and a voltage dropper to drop the voltage across the second capacitor, and to provide the dropped voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An air conditioner comprising:
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a compressor to compress refrigerant; a heat exchanger to perform heat exchange using the compressed refrigerant; and a compressor motor driving device to drive a compressor motor, wherein the compressor motor driving device includes; a rectifier to receive alternate current (AC) power; a boost converter to boost power from the rectifier, and to provide the boosted power; a first capacitor to store power from the boost converter; a first inverter to receive voltage from the first capacitor, and to provide transformed AC power to the compressor motor; a second capacitor to store power from the rectifier; a second inverter to receive voltage from the second capacitor, and to provide transformed AC power to a first fan motor; and a voltage dropper to drop the voltage across the second capacitor, and to provide the dropped voltage. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification