Fan drive system

TWM688382UActive Publication Date: 2026-10-11ASIA VITAL COMPONENTS CO LTD
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Patent Information

Application Number
TW115203029
Authority / Receiving Office
TW · TW
Patent Type
Utility models
Current Assignee / Owner
Filing Date
2026-04-08
Publication Date
2026-10-11
Estimated Expiration
2036-04-07

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Abstract

A fan drive system and its driving method relate to a fan drive system, which includes a PWM signal conversion unit, a microcontroller unit, a forward rotation control unit, a reverse rotation control unit, a forward rotation Hall IC unit, and a reverse rotation Hall IC unit. The PWM signal conversion unit receives a PWM signal and generates a voltage signal. The microcontroller unit receives the voltage signal and generates a control signal, and receives Hall signals and generates multiple drive signals. In response to a forward PWM signal, the forward rotation control unit receives the control signal and generates a constant voltage signal, and the forward rotation Hall IC unit receives the constant voltage signal and generates a Hall signal. In response to a reverse PWM signal, the reverse rotation control unit receives the control signal and generates another constant voltage signal, and the reverse rotation Hall IC unit receives the other constant voltage signal and generates a Hall signal.
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Claims

1. A fan drive system, comprising: a PWM signal conversion unit for receiving a PWM signal and generating a voltage signal; a microcontroller unit electrically connected to the PWM signal conversion unit for receiving the voltage signal and generating a control signal, and for receiving a Hall signal and generating multiple drive signals; a forward rotation control unit electrically connected to the microcontroller unit; a reverse rotation control unit electrically connected to the microcontroller unit; a forward rotation Hall IC unit electrically connected to the microcontroller unit and the forward rotation control unit; and a reverse rotation Hall IC unit electrically connected to the microcontroller unit and the reverse rotation control unit; wherein... In response to the PWM signal being a forward PWM signal, the forward control unit receives the control signal and generates a certain voltage signal, and the forward Hall IC unit receives the certain voltage signal and generates the Hall signal; in response to the PWM signal being a reverse PWM signal, the reverse control unit receives the control signal and generates another certain voltage signal, and the reverse Hall IC unit receives the other certain voltage signal and generates the Hall signal.

2. The fan drive system as described in claim 1, wherein: In response to the PWM signal being a forward PWM signal, the microcontroller unit outputs the control signal through a first pin; in response to the PWM signal being a reverse PWM signal, the microcontroller unit outputs the control signal through a second pin.

3. The fan drive system as claimed in claim 1, wherein the forward rotation control unit includes a first resistor, a second resistor and a first transistor, and the reverse rotation control unit includes a third resistor, a fourth resistor and a second transistor.

4. The fan drive system as described in claim 1 further includes a drive unit electrically connected to the microcontroller unit for receiving the plurality of drive signals and generating a first power signal and a second power signal.

5. The fan drive system as described in claim 1, wherein the frequency of the PWM signal is between 1 kHz and 48 kHz.

6. The fan drive system as claimed in claim 1, wherein the frequency of the PWM signal is between 8 Hz and 12 Hz, and the duty cycle of the inverted PWM signal is between 40% and 60%.