Invention Application
US20070223891A1 FREQUENCY-VARIABLE PULSE-WIDTH-MODULATION MOTOR DRIVE CIRCUIT CAPABLE OF OPERATING UNDER DIFFERENT PWM FREQUENCIES
失效
频率可变脉冲宽度调制电机驱动电路，可在不同的PWM频率下工作
- Patent Title: FREQUENCY-VARIABLE PULSE-WIDTH-MODULATION MOTOR DRIVE CIRCUIT CAPABLE OF OPERATING UNDER DIFFERENT PWM FREQUENCIES
- Patent Title (中): 频率可变脉冲宽度调制电机驱动电路，可在不同的PWM频率下工作
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Application No.: US11386673Application Date: 2006-03-23
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Publication No.: US20070223891A1Publication Date: 2007-09-27
- Inventor: Alex Horng , Chung-Ken Cheng , Pei-Wei Lo
- Applicant: Alex Horng , Chung-Ken Cheng , Pei-Wei Lo
- Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
- Current Assignee: Sunonwealth Electric Machine Industry Co., Ltd.
- Main IPC: H02P7/29
- IPC: H02P7/29
Abstract:
A frequency-variable PWM motor drive circuit includes a drive IC member, a Hall IC member, a PWM converter circuit and a compensation unit. The drive IC member electrically connects with the Hall IC member, the drive IC member further includes a pin electrically connected with the compensation unit and the PWM converter circuit. The PWM converter circuit has a PWM input pin to receive a PWM signal, and converts it into a voltage signal. The compensation unit connects between the pin of the drive IC member and the PWM converter circuit. In operation, the compensation unit can improve a waveform of the voltage signal supplied from the PWM converter circuit, and then output it to the pin of the drive IC member. Consequently, the drive IC member can be steadily operated at predetermined motor speeds under various frequencies of the PWM signals.
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