Motor control device and motor control method
AssigneeDelta Electronics, Inc.
InventorYueh-Lung HUANG
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Abstract
A motor control device and a motor control method are disclosed herein, where the motor control device includes a signal conversion unit, a frequency multiplication unit, a profile generation circuit and a frequency converter unit. The signal conversion unit receives a rotation speed signal from a motor and converts the rotation speed signal into a digital signal. The frequency multiplication unit generates a frequency multiplication signal based on the digital signal. The profile generation circuit performs frequency division on the frequency multiplication signal to get a profile signal. The frequency converter unit generates a reference signal and compares the reference signal with the profile signal to output a motor control signal.
Claims20
A motor control device comprising:
- a signal conversion unit for receiving a rotation speed signal from a motor and for converting the rotation speed signal into a digital signal;
- a frequency multiplication unit for generating a frequency multiplication signal based on the digital signal;
- a profile generation circuit for performing frequency division on the frequency multiplication signal to get a profile signal;
- and
- a frequency converter unit for generating a reference signal and for comparing the reference signal with the profile signal to output a motor control signal.
The motor control device of claim wherein the frequency converter unit comprises:
- a clock generator for generating a clock signal;
- a synchronous counter for generating four counter output signals based on the clock signal, the counter output signals serving as the reference signal;
- a magnitude comparator for performing a comparison operation based on the counter output signals and the second, fourth, fifth and sixth output signals so as to output a co-sinusoidal PWM signal;
- a second D-type flip-flop for outputting a sinusoidal PWM signal according to the co-sinusoidal PWM signal and the clock signal;
- and
- a second inverter for receiving the sinusoidal PWM signal and outputting an inverted sinusoidal PWM signal, wherein the sinusoidal PWM signal and the inverted sinusoidal. PWM signal serve as the motor control signal.
A motor control method comprising:
- (a) receiving a rotation speed signal from a motor and converting the rotation speed signal into a digital signal;
- (b) generating a frequency multiplication signal based on the digital signal;
- (c) performing frequency division on the frequency multiplication signal to get a profile signal;
- and
- (d) generating a reference signal and comparing the reference signal with the profile signal to output a motor control signal.
Dependencies are inferred from the claim text.