Motor control method and device

Details Motor control method and device Motor control method and device

2008-07-30

2011-12-20

Benson, Walter (Department: 2837)

Electricity: motive power systems

Braking

Dynamic braking

C318S400010, C318S400020, C318S599000

Reexamination Certificate

active

08080953

ABSTRACT:
A control device includes a drive control unit that performs control for driving the electromagnetic coil, and a regeneration control unit that performs control for regenerating power from the electromagnetic coil. The drive control unit includes an excitation interval setting unit that sets an excitation interval and a non-excitation interval such that voltage is applied to the electromagnetic coil during the excitation interval while not applied to the electromagnetic coil during the non-excitation interval. The excitation interval has a symmetrical shape whose center corresponds to a π/2 phase point of the induced voltage waveform, and the non-excitation interval has a symmetrical shape whose center corresponds to the π phase point of the induced voltage waveform. The regeneration control unit includes a regeneration interval setting unit that sets a regeneration interval and a non-regeneration interval such that power is regenerated from the electromagnetic coil during the regeneration interval while not regenerated from the electromagnetic coil during the non-regeneration interval. The regeneration interval has a symmetrical shape whose center corresponds to the π/2 phase point of the induced voltage waveform, and the non-regeneration interval has a symmetrical shape whose center corresponds to the π phase point of the induced voltage waveform.

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patent: 2005/0258790 (2005-11-01), Takeuchi
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