Brushless direct current motor driving circuit

Details Brushless direct current motor driving circuit Brushless direct current motor driving circuit

2007-07-12

2010-06-22

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400010, C318S400240, C318S700000

Reexamination Certificate

active

07741799

ABSTRACT:
A brushless DC motor drive circuit includes a drive unit and a transient current suppression circuit. The drive unit comprises a Hall component, a drive component, a first transistor and a second transistor. The Hall component detects the position of a rotor of the DC motor and transmits digital command signals to the drive component; the drive component further generates two complementary digital command signals; and the first and second transistors connect with the drive component respectively. The transient current suppression circuit comprises a first auxiliary transistor and a second auxiliary transistor, wherein the first auxiliary transistor receives one of the complementary digital command signals different from the other one received by the first transistor and the second auxiliary transistor receives the other one of the complementary digital command signals different from the one received by the second transistor.

REFERENCES:
patent: 3749979 (1973-07-01), Rudolph
patent: 4283668 (1981-08-01), Cavil
patent: 4476403 (1984-10-01), Allen
patent: 4516082 (1985-05-01), Smith et al.
patent: 4849845 (1989-07-01), Schmitt
patent: 7177124 (2007-02-01), Lee
patent: 2003/0155886 (2003-08-01), Ohiwa et al.
patent: 2004/0265115 (2004-12-01), Busch

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