Energization controller for an electric motor

Details Energization controller for an electric motor Energization controller for an electric motor

1998-06-01

1999-12-28

Martin, David

Electricity: motive power systems

Switched reluctance motor commutation control

318701, 318373, H02K 2300

Patent

active

060086017

ABSTRACT:
An energization controller for an electric motor eliminates the possibility that a motor driver may be destroyed when the electric motor rotates in the opposite direction from its driving direction. The energization controller comprises energization circuits which are composed of an H type circuit together with an electric coil; a chopping control device for selectively performing a hard chopping mode of alternately repeating a switch-on operation of turning on both switching elements and a switch-off operation of turning off both the switching elements and a soft chopping mode of alternately repeating a switch-on operation of turning on both the switching elements and a singular-on operation of turning off one switching element and turning on the other switching element; a direction detection device for detecting a rotational direction of the motor; and a chopping mode control device for detecting whether or not the rotational direction coincides with a driving direction and for instructing the chopping control device to perform the hard chopping mode during when those directions do not coincide.

REFERENCES:
patent: 4558265 (1985-12-01), Hayashida et al.
patent: 5225758 (1993-07-01), Sakano et al.
patent: 5343382 (1994-08-01), Hale et al.
patent: 5739662 (1998-04-01), Li
patent: 5859519 (1999-01-01), Archer
patent: 5878360 (1999-03-01), Nishino et al.

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