发明名称 Operation of BLDC motors
摘要 The present invention there is provides a method of determining the rotor position in an electric motor comprising the steps of: superimposing one or more alternating signals on to the driving waveform so as to generate one or more oscillating currents in the stator coils; monitoring the variation in magnitude of the oscillating currents and thereby determining the rotor position. Typically, two alternating signals are applied in opposition so as to have no net effect on the torque applied by the driving waveform. Using this technique rotor position estimation can be obtained at start-up from stand-still and at low to medium speeds. The method can be used in applications where a fast motor start is needed under unknown load conditions and can be used to detect when the rotor has passed a certain position that coincides with the commutation instance.
申请公布号 EP2197099(A2) 申请公布日期 2010.06.16
申请号 EP20090178494 申请日期 2009.12.09
申请人 MELEXIS TESSENDERLO NV 发明人 PAINTZ, CHRISTIAN;FREITAG, THOMAS
分类号 H02P6/18;H02P6/22 主分类号 H02P6/18
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