Fan motor control method and device thereof
First Claim
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1. A fan motor control method comprising steps of:
- generating a low-frequency clock signal with a frequency of less than 23 KHz;
converting the low-frequency clock signal to a high-frequency drive signal, wherein the high-frequency drive signal has a frequency of higher than 23 KHz; and
inputting the high-frequency drive signal to a fan motor to drive the fan motor.
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Abstract
A fan motor control device comprises a clock signal generator and a drive unit. The clock signal generator generates a low-frequency clock signal. A frequency of low-frequency clock signal is less than 23 KHz. The drive unit converts the low-frequency clock signal to a high-frequency drive signal and outputs the high-frequency drive signal to drive the fan motor. A frequency of the high-frequency drive signal is higher than 23 KHz.
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Citations
20 Claims
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1. A fan motor control method comprising steps of:
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generating a low-frequency clock signal with a frequency of less than 23 KHz; converting the low-frequency clock signal to a high-frequency drive signal, wherein the high-frequency drive signal has a frequency of higher than 23 KHz; and inputting the high-frequency drive signal to a fan motor to drive the fan motor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A fan motor control device comprising:
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a clock signal generator generating a low-frequency clock signal with a frequency of low-frequency clock signal is less than 23 KHz; and a drive unit converting the low-frequency clock signal to a high-frequency drive signal and outputting the high-frequency drive signal to drive the fan motor, wherein the high-frequency drive signal has a frequency of higher than 23 KHz. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A fan motor control device comprising:
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a digital-to-analog converter receiving an external low-frequency clock signal and converting the external low-frequency clock signal to an analog signal; and a drive unit converting the analog signal to a high-frequency drive signal and outputting the high-frequency drive signal to drive the fan motor, wherein the high-frequency drive signal has a frequency of greater than 23 KHz. - View Dependent Claims (17, 18, 19, 20)
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Specification