Noiseless driving circuit for DC motor

Details Noiseless driving circuit for DC motor Noiseless driving circuit for DC motor

2006-03-28

2006-03-28

Leykin, Rita (Department: 2837)

Electricity: motive power systems

Switched reluctance motor commutation control

C318S132000, C318S434000

Reexamination Certificate

active

07019473

ABSTRACT:
A noiseless driving circuit for direct current (DC) motor is disclosed. The driving circuit uses a magnetic-field sensing circuit with a Hall sensor to sense the corresponding position of the permanent magnet rotor. According to the corresponding position of the permanent magnet rotor, a linear circuit generates a signal with trapezoid waveform for driving the coil of the DC motor. The coils of the DC motor perform soft switching operations without resulting backing electromotive force (BEMF). Therefore, the noise during the operation of the DC motor can be substantially reduced.

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