Energization controller of electric motor

Details Energization controller of electric motor Energization controller of electric motor

1998-06-29

1999-09-28

Ro, Bentsu

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318432, 318701, H02P 705

Patent

active

059594195

ABSTRACT:
An energization controller for an electric motor maintains a desired chopping frequency without increasing a current amplitude. The energization controller is provided with chopping control device which turns off both first and second switching elements of energization circuits of an H-type circuit together with a coil of the electric motor for a predetermined period of time and then turns on only the second switching element when a value of current flowing through the coil exceeds a reference current value and which turns on both the first and second switching elements when the value of current flowing through the coil falls below the reference current value and the predetermined period of time elapses.

REFERENCES:
patent: 4710686 (1987-12-01), Guzik
patent: 4879641 (1989-11-01), Rossi et al.
patent: 5552683 (1996-09-01), Dargent
patent: 5744922 (1998-04-01), Neary et al.
patent: 5801504 (1998-09-01), Endo et al.
patent: 5844387 (1998-12-01), Mukai et al.

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