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US 8,558,494 B2Granted
Driving device of brushless DC motor for fan
AssigneeDelta Electronics, Inc.
InventorsWei-Shuo Tseng, Chia-Pin Wei, Yu-Wei Lee
Life of this patent
Estimating the term…
Abstract
A driving device is electrically connected with an AC power and a brushless DC motor for a fan. The driving device includes a rectifier unit, a filter unit, a switch power conversion unit and a control unit. The rectifier unit receives the AC power and rectifies the AC power. The filter unit, electrically connected with the rectifier unit, filters the rectified AC power and generates a DC power. The switch power conversion unit, electrically connected with the filter unit and the brushless DC motor, receives the DC power and outputs a driving power to the brushless DC motor. The control unit is electrically connected with the switch power conversion unit and the brushless DC motor.
Claims15
A driving device to be electrically connected with an AC power and a brushless DC motor, the driving device comprising:
- a rectifier unit for receiving and rectifying the AC power;
- a filter unit, which is electrically connected with the rectifier unit and for filtering the rectified AC power to generate a DC power;
- a switch power conversion unit, which is electrically connected with the filter unit and the brushless DC motor and receives the DC power and outputs a driving power to the brushless DC motor, wherein the switch power conversion unit comprises a boost converter;
- and
- a control unit electrically connected with the switch power conversion unit and the brushless DC motor,
- wherein the boost converter comprises:
- a switch element;
- an inductor having one terminal for receiving the DC power and the other terminal electrically connected with the switch element;
- a rectifier element having a first terminal electrically connected with the other terminal of the inductor and the switch element, and the second terminal electrically connected with the brushless DC motor;
- a capacitor having one terminal electrically connected with the second terminal of the rectifier element and the brushless DC motor, and the other terminal grounded;
- an output voltage detecting element, which is electrically connected with the second terminal of the rectifier element, the other terminal of the capacitor and the brushless DC motor, and outputs a detection signal according to the driving power;
- a PWM control element, which is electrically connected with the switch element and the output voltage detecting element, and adjusts a duty cycle of the switch element according to the detection signal;
- and a auxiliary power, which is electrically connected with the PWM control element and provides an auxiliary voltage to the PWM control element.
10 more elements
A driving device to be electrically connected with an AC power and a brushless DC motor, the driving device comprising:
- a rectifier unit for receiving and rectifying AC power;
- a filter unit, which is electrically connected with the rectifier unit and for filtering the rectified AC power to generate a DC power;
- a switch power conversion unit, which is electrically connected with the filter unit and the brushless DC motor and receives the DC power and outputs a driving power to the brushless DC motor, wherein the switch power conversion unit comprises a buck converter;
- and
- a control unit electrically connected with the switch power conversion unit and the brushless DC motor,
- wherein the buck converter comprises:
- a switch element for receiving the DC power;
- an electric isolation unit having a non-electric-isolating side and an electric-isolating side coupled with the non-electric-isolating side, wherein the non-electric-isolating side has an input terminal electrically connected with the switch element;
- a first rectifier element having one terminal electrically connected with the switch element and an input terminal of the non-electric-isolating side of the electric isolation unit, and the other terminal grounded;
- a first capacitor having one terminal electrically connected with an output terminal of the non-electric-isolating side of the electric isolation unit and the brushless DC motor, and the other terminal grounded;
- a second rectifier element having one terminal electrically connected with the electric-isolating side of the electric isolation unit;
- a second capacitor having one terminal electrically connected with the second rectifier element, and the other terminal grounded;
- an output voltage detecting element, which is electrically connected with the output terminal of the non-electric-isolating side of the electric isolation unit, the one terminal of the first capacitor and the brushless DC motor, and outputs a detection signal according to the driving power;
- a PWM control element, which is electrically connected with the switch element and the output voltage detecting element, and adjusts a duty cycle of the switch element according to the detection signal;
- and
- an auxiliary power, which is electrically connected with the other terminal of the second rectifier element, the one terminal of the second capacitor and the PWM control element, and provides an auxiliary voltage to the PWM control element.
13 more elements
A driving device to be electrically connected with an AC power and a brushless DC motor, the driving device comprising:
- a rectifier unit for receiving and rectifying the AC power;
- a filter unit, which is electrically connected with the rectifier unit and for filtering the rectified AC power to generate a DC power;
- a switch power conversion unit, which is electrically connected with the filter unit and the brushless DC motor and receives the DC power and outputs a driving power to the brushless DC motor, wherein the switch power conversion nit comprises a flyback converter;
- and
- a control unit electrically connected with the switch power conversion unit and the brushless DC motor,
- wherein the flyback converter comprises:
- a switch element;
- an electric isolation unit having a non-electric-isolating side and a first electric-isolating side and a second electric-isolating side both coupled with the non-electric-isolating side, wherein the non-electric-isolating side has an input terminal for receiving the DC power, and an output terminal electrically connected with the switch element;
- a first rectifier element having one terminal electrically connected with the first electric-isolating side of the electric isolation unit;
- a first capacitor having one terminal electrically connected with the first rectifier element and the brushless DC motor, and the other terminal grounded;
- a second rectifier element having one terminal electrically connected with the second electric-isolating side of the electric isolation unit;
- a second capacitor having one terminal electrically connected with the second rectifier element, and the other terminal grounded;
- an output voltage detecting element, which is electrically connected with the other terminal of the first rectifier element, the one terminal of the first capacitor and the brushless DC motor, and outputs a detection signal according to the driving power;
- a PWM control element, which is electrically connected with the switch element and coupled with the output voltage detecting element, and adjusts a duty cycle of the switch element according to the detection signal;
- and
- an auxiliary power, which is electrically connected with the other terminal of the second rectifier element, the one terminal of the second capacitor and the PWM control element, and provides an auxiliary voltage to the PWM control element.
13 more elements
A driving device to be electrically connected with an AC power and a brushless DC motor, the driving device comprising:
- a rectifier unit for receiving and rectifying the AC power;
- a filter unit, which is electrically connected with the rectifier unit and for filtering the rectified AC power to generate a DC power;
- a switch power conversion unit, which is electrically connected with the filter unit and the brushless DC motor and receives the DC power and outputs a driving power to the brushless DC motor, wherein the switch power conversion unit comprises a forward converter;
- and
- a control unit electrically connected with the switch power conversion unit and the brushless DC motor,
- wherein the forward converter comprises:
- a switch element;
- an electric isolation unit having a non-electric-isolating side and a first electric-isolating side and a second electric-isolating side both coupled with the non-electric-isolating side, wherein the non-electric-isolating side has an input terminal for receiving the DC power, and an output terminal electrically connected with the switch element;
- a first rectifier element having one terminal electrically connected with the first electric-isolating side of the electric isolation unit;
- a second rectifier element having one terminal electrically connected with the other terminal of the first rectifier element, and the other terminal grounded;
- a first filter element electrically connected with the other terminal of the first rectifier element, the one terminal of the second rectifier element and the brushless DC motor;
- a third rectifier element having one terminal electrically connected with the second electric-isolating side of the electric isolation unit;
- a fourth rectifier element having one terminal electrically connected with the other terminal of the second rectifier element, and the other terminal grounded;
- a second filter element electrically connected with the other terminal of the third rectifier element and the one terminal of the fourth rectifier element;
- an output voltage detecting element, which is electrically connected with the first filter element and the brushless DC motor and outputs a detection signal according to the driving power;
- a PWM control element, which is electrically connected with the switch element and coupled with the output voltage detecting element, and adjusts a duty cycle of the switch element according to the detection signal;
- and
- an auxiliary power, which is electrically connected with the second filter element and the PWM control element, and provides an auxiliary voltage to the PWM control element.
15 more elements
Dependencies are inferred from the claim text.