Motor driving device including single inverter for single-phase motor and three-phase motor and appliance having the same
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United States of America Patent
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Sep 21, 2021
Grant Date -
Dec 17, 2020
app pub date -
Mar 26, 2020
filing date -
Mar 26, 2019
priority date (Note) -
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Abstract
A motor driving device controls a three-phase motor and a single-phase motor to operate in parallel. The motor driving device includes a dc terminal in which an upper and a lower DC-link capacitor are located. The motor driving device also includes a neutral terminal disposed between the upper and lower DC-link capacitors. The motor driving device includes an inverter that includes three pairs of upper switching elements and lower switching elements. Two pairs of upper switching elements and lower switching elements among three pairs are connected to a-phase terminal and b-phase terminal of the three-phase motor, respectively. The other pair of upper switching elements and lower switching elements among three pairs is connected to a first terminal of the single-phase motor. The neutral terminal is connected to c-phase terminal of the three-phase motor and a second terminal of the single-phase motor.
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