Method for judging magnetic pole polarity of motor rotor
A polarity judgment, motor rotor technology, applied in the direction of electronic commutator, motor control, generator control, etc., can solve the problem of failing to identify the polarity of the magnetic pole, and achieve the effect of fast and accurate acquisition and simple calculation method
Inactive Publication Date: 2018-06-12
SF TECH
3 Cites 9 Cited by
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Abstract
Provided is a method for judging magnetic pole polarity of a motor rotor. Pulsating high frequency voltage signals are injected into a direct axis, high frequency current response values of the directaxis and a quadrature axis are obtained; according to the response currents of the direct axis and quadrature axis, a first direct axis high frequency current corresponding to a phase shown in the description and a second direct axis high frequency current corresponding to a phase shown in the description are calculated; the magnetic pole polarity of the motor rotor is judged by comparing absolute values of the first direct axis high frequency current and second direct axis high frequency current. According to the method, only the pulsating high frequency voltage signals are injected into thedirect axis, an initial estimated value of the rotor position is obtained through calculation, and it is judged whether the initial estimated value is revised or not. The method is compared with theprior art, multiple injection voltages are not needed to acquire the corresponding parameters, the calculation method is simple, and the magnetic pole polarity of the motor rotor can be quickly and accurately obtained.
Application Domain
AC motor controlElectric motor control +6
Technology Topic
Multiple injectionPhysics +7
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