发明名称 |
ELECTRIC MOTOR DRIVE SYSTEM AND WINDING SWITCHING METHOD |
摘要 |
An electric motor drive system includes an electric motor including windings for separate phases including a center tap, a winding for a low-speed rotation located between the center tap and a winding start terminal, and a winding for a high-speed rotation located between the center tap and a winding end terminal; an inverter configured to supply an inverter electric current to the winding of each phase; a first winding switch portion configured to open and close connection between the inverter and the winding start terminal, and a second winding switch portion configured to open and close connection between the inverter and the center tap of the winding of each phase; and a controller configured or programmed to control opening and closing of each of the first and second winding switch portions. |
申请公布号 |
US2015311850(A1) |
申请公布日期 |
2015.10.29 |
申请号 |
US201514589177 |
申请日期 |
2015.01.05 |
申请人 |
Nidec Corporation |
发明人 |
YANO Akira;SHIMIZU Daisuke;YANO Katsuhisa;MOMEN Kenta |
分类号 |
H02P25/18 |
主分类号 |
H02P25/18 |
代理机构 |
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代理人 |
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主权项 |
1. An electric motor drive system comprising:
an electric motor including windings of a plurality of phases, each winding for a separate one of the plurality of phases including a center tap, a winding start terminal, a winding end terminal, a winding used for a low-speed rotation located between the center tap and the winding start terminal, and a winding used for a high-speed rotation located between the center tap and the winding end terminal; an inverter configured to supply an inverter electric current with a variable frequency to the winding of each phase of the electric motor; a first winding switch portion configured to open and close connection between the inverter and the winding start terminal of the winding of each phase, and a second winding switch portion configured to open and close connection between the inverter and the center tap of the winding of each phase; and a controller configured or programmed to control opening and closing of each of the first and second winding switch portions; wherein the controller is configured or programmed to include a mode in which the second winding switch portion is caused to shift from an open state to a closed state before the first winding switch portion is caused to shift from the closed state to the open state. |
地址 |
Kyoto JP |