Power converter and electric motor braking method
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United States of America Patent
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Apr 2, 2024
Grant Date -
Oct 6, 2022
app pub date -
Jun 14, 2019
filing date -
Jun 14, 2019
priority date (Note) -
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Abstract
A power converter including a diode converter, an inverter, a smoothing capacitor, a resistor; a current sensor; an estimation unit; and a control unit. The diode converter rectifies an alternating current from a power supply. The inverter is formed such that a DC side is connected to a DC output of the diode converter and an AC side is connected to an electric motor and includes a semiconductor switching element which converts DC power on the DC side into AC power and a reverse connection diode which is connected in antiparallel with the semiconductor switching element. The smoothing capacitor is provided in the DC output of the diode converter. The resistor is connected in parallel with the smoothing capacitor. The current sensor detects a load current flowing between the inverter and the electric motor.
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