Motor controlling circuit, motor driving device, and motor controlling method
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorBon Young KOO
Life of this patent
Estimating the term…
Abstract
There are provided a motor controlling circuit, a motor driving device, and a motor controlling method. The motor controlling circuit includes: a frequency detecting unit detecting a frequency of an internal clock signal of a motor driving circuit; a sampling unit sampling an input pulse width modulation (PWM) signal using the frequency of the internal clock signal; and a calculating unit sensing a change in a speed of the internal clock signal from a sampling result of the sampling unit and calculating a revolution per minute (RPM) of a motor from the sensed change in the speed.
Claims10
A motor controlling circuit comprising:
- a frequency detecting unit detecting a frequency of an internal clock signal of a motor driving circuit;
- a sampling unit sampling an input pulse width modulation (PWM) signal using the frequency of the internal clock signal;
- and
- a calculating unit sensing a change in a speed of the internal clock signal from a sampling result of the sampling unit and calculating a revolution per minute (RPM) of a motor from the sensed change in the speed.
A motor driving device comprising:
- a frequency detecting unit detecting a frequency of an input PWM signal;
- a comparing unit detecting a driving RPM of a motor and comparing the detected driving RPM of the motor with an RPM according to a duty value of the input PWM signal;
- and
- a signal generating unit generating a driving signal for the motor, based on a comparison result of the comparing unit,
- wherein the comparing unit detects the driving RPM of the motor using the frequency of the input PWM signal.
A motor controlling method comprising:
- detecting a frequency of an internal clock signal of a motor driving circuit;
- sampling an input PWM signal using the frequency of the internal clock signal;
- sensing a change in a speed of the internal clock signal from a sampling result for the input PWM signal;
- and
- calculating an RPM of a motor from the sensed change in the speed.
Dependencies are inferred from the claim text.