发明名称 |
Rotary electric machine driving device |
摘要 |
A rotary electric machine driving device including: an inverter that is electrically interposed between a direct-current power supply and the rotary electric machine, and converts electric power between a direct current and an alternating current; a smoothing capacitor that is electrically interposed between the direct-current power supply and the inverter, and is connected between a positive pole and a negative pole on a direct-current side of the inverter; an inverter control unit that controls switching of a switching element of the inverter according to a predetermined switching frequency; and an inductance control unit that switches a direct-current side inductance between a positive pole of the direct-current power supply and a positive pole of the smoothing capacitor, according to the switching frequency, between a predefined standard inductance and a high inductance that is higher than the standard inductance. |
申请公布号 |
US9520809(B2) |
申请公布日期 |
2016.12.13 |
申请号 |
US201414761904 |
申请日期 |
2014.03.26 |
申请人 |
AISIN AW CO., LTD. |
发明人 |
Saha Subrata;Totani Hirohisa |
分类号 |
H02P1/30;H02P1/52;H02P3/00;H02P7/06;H02M7/5395;H02P27/06;H02M1/15 |
主分类号 |
H02P1/30 |
代理机构 |
Oliff PLC |
代理人 |
Oliff PLC |
主权项 |
1. A rotary electric machine driving device that drives and controls an alternating-current rotary electric machine, the rotary electric machine driving device comprising:
an inverter that is electrically interposed between a direct-current power supply and the rotary electric machine, and converts electric power between a direct current and an alternating current; a smoothing capacitor that is electrically interposed between the direct-current power supply and the inverter, and is connected between a positive pole and a negative pole on a direct-current side of the inverter; an inverter control unit that controls switching of a switching element of the inverter according to a predetermined switching frequency; and an inductance control unit that switches a direct-current side inductance between a positive pole of the direct-current power supply and a positive pole of the smoothing capacitor, according to the switching frequency, between a predefined standard inductance and a high inductance that is higher than the standard inductance, wherein in a frequency characteristic of a direct-current side voltage gain obtained by dividing a system voltage that is a voltage on the direct-current side of the inverter by a system current that is a current on the direct-current side of the inverter, a first frequency is a frequency at which a value of the direct-current side voltage gain corresponding to the standard inductance is equal to a value of the direct-current side voltage gain corresponding to the high inductance, in a frequency characteristic of the direct-current side current gain obtained by dividing a power supply current that is a current flowing through the direct-current power supply by the system current, a second frequency is a frequency at which a value of the direct-current side current gain corresponding to the standard inductance is equal to a value of the direct-current side current gain corresponding to the high inductance, and the inductance control unit switches the direct-current side inductance to the standard inductance when the switching frequency is lower than a frequency of a switching point set in a frequency range between the first frequency and the second frequency and to the high inductance when the switching frequency is higher than the frequency of the switching point. |
地址 |
Anjo JP |