发明名称 |
Motor drive system and its control method |
摘要 |
A ripple detection unit detects a ripple current width of a motor current controlled according to PWM control. A ripple reference setting unit sets a reference value of the ripple current width. A frequency adjusting unit sets a control signal indicating a carrier frequency of the PWM control according to a ripple current width deviation. A carrier generation unit generates a carrier of the frequency based on the control signal. Thus, it is possible to realize feedback control of the carrier frequency for maintaining the ripple current width at an appropriate level. |
申请公布号 |
US8138712(B2) |
申请公布日期 |
2012.03.20 |
申请号 |
US20080451671 |
申请日期 |
2008.06.12 |
申请人 |
YAMADA KENJI;TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
YAMADA KENJI |
分类号 |
H02P6/00;H02P7/00;H02P21/00;H02P27/00;H02P27/04 |
主分类号 |
H02P6/00 |
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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