发明名称 |
Motor control device and out-of-step detecting method |
摘要 |
A motor control device for a stepping motor including at least two phase coils and a rotor is provided. The motor control device includes a control unit which applies a pulse voltage subjected to pulse width modulation, to each of the at least two phase coils, a back electromotive voltage measuring unit which provides a halt period to temporarily halt the application of the pulse voltage to one of the phase coils when a direction of the coil current flowing in the one phase coil is switched, and which measures a back electromotive voltage induced in the one phase coil during the halt period, an out-of-step detecting unit which detects an out-of-step of the stepping motor if the measured back electromotive voltage satisfies a predetermined criterion, and a voltage control unit which sets a voltage for all phase coils other than the one phase coil to a constant voltage during the halt period.
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申请公布号 |
US8466648(B2) |
申请公布日期 |
2013.06.18 |
申请号 |
US201113172206 |
申请日期 |
2011.06.29 |
申请人 |
TAKADA KAZUO;MATSUI TAKAYUKI;MINEBEA CO., LTD. |
发明人 |
TAKADA KAZUO;MATSUI TAKAYUKI |
分类号 |
H02P8/38;H02P6/18;H02P8/00 |
主分类号 |
H02P8/38 |
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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