Driving apparatus for driving a brushless motor

Details Driving apparatus for driving a brushless motor Driving apparatus for driving a brushless motor

2005-12-27

2005-12-27

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S254100, C318S132000, C318S434000, C318S269000, C318S273000, C318S275000, C318S362000

Reexamination Certificate

active

06979976

ABSTRACT:
A driving system for driving a brushless motor effects a rotation control of a rotor by sequentially switching application of a current to magnetic coils disposed in a stator in response to a detection signal from a pole-position detector. The driving system comprises a controlling circuit for generating a driving signal, an inverter control circuit for controlling application of the current to the coils by adjusting opening and closing of switching devices in response to the driving signal, and a rotational speed sensor. The controlling circuit generates a braking signal when a rotational speed of the rotor is beyond a predetermined value, and transmits the braking signal to the inverter control circuit. The inverter control circuit effects a braking control in response to the braking signal by application of the current to at least one coil except those coils being excited upon reception of the braking signal.

REFERENCES:
patent: 3940670 (1976-02-01), Tanikoshi
patent: 4396876 (1983-08-01), Tojiki et al.
patent: 4423363 (1983-12-01), Clark et al.
patent: 5254915 (1993-10-01), Komatsu et al.
patent: 6459224 (2002-10-01), Itoh et al.

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