Variable-frequency motor device and fan thereof
AssigneeDelta Electronics, Inc.
InventorsHsin-Chih LIN, Lee-Long CHEN, Kun-Chou LEE
Life of this patent
Estimating the term…
Abstract
A variable-frequency motor device that runs on alternating current includes a first converting circuit, a second converting circuit, and a DC variable-frequency motor. An operation module is coupled to the variable-frequency motor device, and provides the alternating current to the first or second converting circuit. The first converting circuit receives the alternating current, and generates a first rotation-speed signal. The second converting circuit receives the alternating current, and generates a second rotation-speed signal. The DC variable-frequency motor is driven at a rotation speed according to the first or second rotation-speed signal.
Claims19
A variable-frequency motor device that runs on alternating current and coupled to an operation module, the variable-frequency motor device comprising:
- a first converting circuit, comprising:
- a first rectifier circuit, receiving the alternating current, generating a first direct current;
- and
- a first modulator module, receiving the alternating current, generating a first rotation-speed signal;
- a second converting circuit, comprising:
- a second rectifier circuit, receiving the alternating current, generating a second direct current;
- and
- a second modulator module, receiving the alternating current, generating a second rotation-speed signal;
- and
- a DC motor, receiving the first direct current or the second direct current, driven at a corresponding rotation speed according to first rotation-speed signal or the second rotation-speed signal,
- wherein the operation module selectively applies the alternating current to the first converting circuit or the second converting circuit.
A fan that runs on alternating current, comprising:
- a variable-frequency motor device comprising:
- a converting circuit comprising:
- a rectifier circuit, receiving the alternating current, generating a direct current;
- and
- a modulator module, receiving the alternating current, generating an initial signal;
- and
- a DC motor receiving the direct current;
- an operation module, coupled to the modulator module, receiving the initial signal;
- and
- an impeller pivoted on the DC motor,
- wherein the operation module transforms the initial signal to the rotation-speed signal according an operation event, and the DC motor is driven at a corresponding rotation speed according to the rotation-speed signal, and drives the rotating impeller.
Dependencies are inferred from the claim text.