发明名称 |
CIRCUIT AND METHOD FOR SENSORLESS CONTROL OF A PERMANENT MAGNET BRUSHLESS MOTOR DURING THE START-UP |
摘要 |
<p>The system discloses structure for synchronizing sequential phase switching in driving a set of stator windings of a multi-phase sensorless brushless permanent magnet DC motor. A drive voltage drives a plurality of the stator windings thereby producing a magnetic field. On an undriven stator winding among the stator windings, a voltage induced by the magnetic field is sampled. The induced voltage changes as a function of a magnetic rotor transitioning across a plurality of angular positions. A first value corresponding to the sampled voltage induced on the currentless winding is compared with a commutation threshold to determine a proper commutation point. The system is switched to a next drive configuration of the sequence when the first value surpasses the threshold.</p> |
申请公布号 |
WO2013176908(A1) |
申请公布日期 |
2013.11.28 |
申请号 |
WO2013US40531 |
申请日期 |
2013.05.10 |
申请人 |
CIRRUS LOGIC, INC. |
发明人 |
SANCHEZ, STEPHEN JAMES;KOBOYASHI, MARC JOHN;PJETAR, BRANISLAV |
分类号 |
H02P6/18 |
主分类号 |
H02P6/18 |
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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