发明名称 |
Motor drive apparatus, electric actuator and electric power steering apparatus |
摘要 |
The present invention relates to an actuator which is in an operation range subjected to quick acceleration and deceleration, a motor drive apparatus, an electric actuator and an electric power steering apparatus capable of continuous torque control up to the high drive speed and high torque area. A controller (3) comprises a voltage saturation detecting means (52) for detecting the voltage saturation WO of the output voltage of an inverter circuit (1), based on the battery voltage Ed, and a waveform controller (51) that converts the drive waveform of the inverter circuit (1) into the waveform created by superimposing harmonics of high odd-numbered order on a sinusoidal wave as a fundamental wave of the modulated wave modulated by a PWM carrier wave; and continuously changes the ratio of superimposing the high-order harmonics in response to the voltage saturation WO detected by a voltage saturation detecting means (52). This arrangement allows the controller (3) to continuously change the drive waveform of the inverter circuit (1). |
申请公布号 |
EP1612924(A3) |
申请公布日期 |
2012.08.22 |
申请号 |
EP20050014229 |
申请日期 |
2005.06.30 |
申请人 |
HITACHI, LTD. |
发明人 |
AJIMA, TOSHIYUKI;MIYAZAKI, HIDEKI;KANEKO, SATORU;TAKAMUNE, YUUICHIROU |
分类号 |
H02P6/10;B62D5/04;F16D65/14 |
主分类号 |
H02P6/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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