Temperature compensation for DC motor PWM applications
First Claim
1. A motor control system comprising:
- temperature compensated power supply configured to receive a supply voltage and output a temperature compensated reference voltage, wherein the reference voltage varies according to an ambient temperature of the motor control system;
a microcontroller configured to receive the temperature compensated reference voltage and a sensed motor current and to produce a corresponding pulse-width-modulated (PWM) motor control signal, wherein the microcontroller is configured to increase a duty cycle of the PWM motor control signal as a function of the temperature compensated reference voltage; and
a motor configured to be controlled according to the duty cycle of the motor control signal.
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Accused Products
Abstract
Motor control systems and methods. A motor control system includes a temperature compensated power supply configured to receive a supply voltage and output a temperature compensated reference voltage. The reference voltage varies according to an ambient temperature of the motor control system. The motor control system includes a microcontroller configured to receive the temperature compensated reference voltage and a sensed motor current and to produce a corresponding pulse-width-modulated (PWM) motor control signal. The microcontroller is configured to increase a duty cycle of the PWM motor control signal as a function of the temperature compensated reference voltage. The motor control system includes a motor configured to be controlled according to the duty cycle of the motor control signal.
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Citations
10 Claims
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1. A motor control system comprising:
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temperature compensated power supply configured to receive a supply voltage and output a temperature compensated reference voltage, wherein the reference voltage varies according to an ambient temperature of the motor control system; a microcontroller configured to receive the temperature compensated reference voltage and a sensed motor current and to produce a corresponding pulse-width-modulated (PWM) motor control signal, wherein the microcontroller is configured to increase a duty cycle of the PWM motor control signal as a function of the temperature compensated reference voltage; and a motor configured to be controlled according to the duty cycle of the motor control signal. - View Dependent Claims (2, 3, 4, 5)
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6. A motor control method performed by a motor control system, comprising:
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receiving a supply voltage by a temperature compensated power supply; generating a temperature compensated reference voltage from the supply voltage by the temperature compensated power supply, wherein the temperature compensated reference voltage varies according to an ambient temperature of the motor control system; controlling a motor using a pulse-width-modulated (PWM) motor control signal by a microcontroller, wherein the microcontroller receives the temperature compensated reference voltage from the temperature compensated power supply and a sensed motor current, and varies the pulse width of the motor control signal according to the temperature compensated reference voltage. - View Dependent Claims (7, 8, 9, 10)
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Specification