发明名称 |
METHOD AND CIRCUIT ARRANGEMENT FOR DETECTING MOTOR LOAD WITHOUT SENSORS AND FOR CONTROLLING MOTOR CURRENT ACCORDING TO LOAD FOR A STEPPER MOTOR |
摘要 |
A method and a circuit arrangement are provided in which a mechanical load applied to the motor shaft or a load angle of the motor can be detected without sensors in a stepper motor. This is achieved substantially based on the fact that the load or the load angle creates a mutually induced voltage (back EMF) in the motor coils and the load or the load angle is detected by determining the phase shift of the motor voltage at at least one of the motor coil relative to the coil current at said motor coil connection, the phase shift being caused by the mutually induced voltage. A method and a circuit arrangement are also provided wherein the motor current of a stepper motor can be controlled according to load angle in such a way that the current consumption of the motor is relatively low
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申请公布号 |
US2013221894(A1) |
申请公布日期 |
2013.08.29 |
申请号 |
US201113883355 |
申请日期 |
2011.11.09 |
申请人 |
LARSSON LARS;DWERSTEG BERNHARD |
发明人 |
LARSSON LARS;DWERSTEG BERNHARD |
分类号 |
H02P8/12;G01R19/00 |
主分类号 |
H02P8/12 |
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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