Motor speed control circuit and control method thereof
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United States of America Patent
Stats
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Jan 16, 2018
Issued Date -
N/A
app pub date -
Nov 10, 2015
filing date -
Jul 22, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motor speed control circuit including a voltage-dividing module, a first analog-to-digital converter, a second analog-to-digital converter and an operation module. The voltage-dividing module includes a first resistor unit and a second resistor unit. The first analog-to-digital converter receives a supply voltage and converts the supply voltage into a digital supply voltage. The second analog-to-digital converter receives a divided voltage generated by the voltage-dividing module, and converts the divided voltage into a digital divided voltage. The divided voltage is associated with a resistance ratio between the first resistor unit and the second resistor unit. The operation module receives the digital divided voltage and determines a motor speed curve according to the resistance ratio. The operation module generates a first pulse width modulation signal according to the motor speed curve and the digital supply voltage to drive a motor.
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Patent Citation Ranking
- 1 Citation Count
- H02P Class
- 22.30 % this patent is cited more than
- 7 Age
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