Method of torque notch minimization for quasi square wave back E

Details Method of torque notch minimization for quasi square wave back E Method of torque notch minimization for quasi square wave back E

1993-05-28

1995-02-07

Shoop, Jr., William M.

Electricity: motive power systems

Synchronous motor systems

Field winding circuits

318254, H02P 742

Patent

active

053878540

ABSTRACT:
A method for smoothing the torque characteristics of a multi-phase PM synchronous machine by controlled driving with a conventional voltage source inverter operated in accordance with a predetermined switching sequence wherein the sum of the excitation voltages applied to the incoming phase winding and outgoing phase winding are maintained constant at a predetermined value for the duration of each commutation period. In addition, the individual excitation voltages applied to the remaining phase active windings are also held constant during the commutation period.

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patent: 5223771 (1993-06-01), Chari
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Le-Huy et al., "Minimization of Torque Ripple in Brushless DC Motor Drives", IEEE Trans. on IA, vol. IA-22, No. 4, pp. 748-755 (Jul./Aug. 1986).
Murai et al., "Torque Ripple Improvement for Brushless DC Miniature Motors", IEEE Trans. on IA, vol. 25, No. 3, pp. 441-450 (May/Jun. 1989).
Berendsen et al., "Commutation Strategies for Brushless D.C. Motors: Influence on Instant Torque", Conf. Proc. of 1990 Applied Power Electronics Conf., pp. 394-400 (Mar. 1990).

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