发明名称 |
MOTOR CONTROL DEVICE AND METHOD FOR DETECTING OUT-OF-STEP |
摘要 |
There is provided a motor control device for controlling a stepping motor having at least two coils. The motor control device includes a controller applies a pulse voltage being subjected to pulse width modulation to each of the coils and provides a stop period to a target coil being subjected to switching of a direction of the coil current, during which the application of the pulse voltage to the target coil is temporarily stopped. The controller also performs a control to set on-duty of the pulse voltage applied to all of the coils except the target coil to be either 100% or 0% during the stop period. An out-of step of the stepping motor is detected when a back electromotive voltage induced in the target coil during the stop period satisfies a predetermined out-of-step determination criterion. |
申请公布号 |
US2015214878(A1) |
申请公布日期 |
2015.07.30 |
申请号 |
US201414546342 |
申请日期 |
2014.11.18 |
申请人 |
MINEBEA CO., LTD. |
发明人 |
TAKADA Kazuo;MATSUI Takayuki |
分类号 |
H02P8/38 |
主分类号 |
H02P8/38 |
代理机构 |
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代理人 |
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主权项 |
1. A motor control device for controlling a stepping motor having at least two coils, through which coil currents having different phases flow respectively, and a rotor configured to rotate by periodically switching a phase of the coil currents flowing through each of the coils, the motor control device comprising:
a controller configured to apply a pulse voltage being subjected to pulse width modulation to each of the coils and to provide a stop period to a target coil being subjected to switching of a direction of the coil current, during which the application of the pulse voltage to the target coil is temporarily stopped; a back electromotive voltage measuring unit configured to measure a back electromotive voltage induced in the target coil during the stop period; and a detecting unit configured to detect an out-of-step of the stepping motor when the back electromotive voltage measured by the back electromotive voltage measuring unit satisfies a predetermined out-of-step determination criterion, wherein the controller performs a control to set on-duty of the pulse voltage applied to all of the coils except the target coil to be either 100% or 0% during the stop period. |
地址 |
KITASAKU-GUN JP |