Current control type circuit for brushless motor

Details Current control type circuit for brushless motor Current control type circuit for brushless motor

1985-10-25

1986-12-23

Shoop, Jr., William M.

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318307, 318309, H02P 602

Patent

active

046314580

ABSTRACT:
There is provided a chopping, current-control type driver circuit for brushless motor including a circuit for effecting chopping on the basis of a speed/phase error signal, a changeover circuit for changing over the current direction of Hall devices depending upon whether said error signal is positive or negative, switch circuit for supplying power to stator coils on the basis of the Hall device output, a current detection device, and an amplifier serving as an inverting amplifier or a noninverting amplifier depending upon whether the error signal is positive or negative, wherein a negative feedback signal is applied to the error signal in the form of the current value detected by the current detection device in order to control the current flowing through the motor stator.

REFERENCES:
patent: 4039911 (1977-08-01), Tanikoshi
patent: 4114073 (1978-09-01), Uzuka

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