发明名称 |
PWM Strategy for Reduction of Inverter Hotspot Temperature and Overall Losses |
摘要 |
A PWM strategy can be implemented to reduce device power losses and hotspot temperature in an inverter circuit that drives a synchronous motor. A method includes migrating a phase current from a power device with higher losses to a power device with lower losses. A PWM modulation signal can be modified to alter the inverter duty cycle and migrate phase current in the direction of lower losses. As an example, a PWM reference signal can be shifted to a lower value. A PWM loss reduction strategy can be performed while a motor is in a rotor-lock state to reduce device hotspot temperature. The PWM loss reduction strategy can also be performed when a motor is operating in a normal state, pushing PWM to DPWM, reducing switching and overall losses. The strategy can be practiced while a PMSM is operating as a motor, and can also be practiced during regenerative braking. |
申请公布号 |
US2013069570(A1) |
申请公布日期 |
2013.03.21 |
申请号 |
US201113234684 |
申请日期 |
2011.09.16 |
申请人 |
CHEN LIHUA;CHEN CHINGCHI;DEGNER MICHAEL W.;ZAREI SHAHRAM;FORD GLOBAL TECHNOLOGIES, LLC |
发明人 |
CHEN LIHUA;CHEN CHINGCHI;DEGNER MICHAEL W.;ZAREI SHAHRAM |
分类号 |
H02P6/14 |
主分类号 |
H02P6/14 |
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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