发明名称 |
ELECTRIC MOTOR DRIVING APPARATUS HAVING FAILURE DETECTION CIRCUIT, AND FAILURE DETECTION METHOD FOR THE ELECTRIC MOTOR DRIVING APPARATUS HAVING FAILURE DETECTION CIRCUIT |
摘要 |
An electric motor driving apparatus having a failure detection circuit includes: a bridge circuit driving an electric motor; a PWM control circuit generating voltage instruction for driving the electric motor; a PWM signal generation circuit generating a PWM signal; a DC current detection circuit detecting DC current of the bridge circuit; a phase current calculation circuit calculating output phase current of the bridge circuit, based on the DC current and PWM signal; and a failure detection circuit detecting failure of the DC current detection circuit. The failure detection circuit determines failure of the DC current detection circuit from the DC current detected values in a zero voltage period in which the high-potential-side arms of the bridge circuit are all ON and in a zero voltage period in which the low-potential-side arms are all ON. |
申请公布号 |
US2013257332(A1) |
申请公布日期 |
2013.10.03 |
申请号 |
US201313738213 |
申请日期 |
2013.01.10 |
申请人 |
NAKANO KOSUKE;KOJIMA TETSUYA;AZUMA SATOSHI;KEZOBO ISAO;TAKIGUCHI RYUICHI |
发明人 |
NAKANO KOSUKE;KOJIMA TETSUYA;AZUMA SATOSHI;KEZOBO ISAO;TAKIGUCHI RYUICHI |
分类号 |
H02K11/00;H02P23/00 |
主分类号 |
H02K11/00 |
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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