H-bridge motor controller supporting unipolar and bipolar pulse width modulation control

Abstract

The invention relates to an H-bridge motor controller supporting unipolar and bipolar pulse width modulation control, which comprises an interface management logic circuit, a channel control logic circuit, a fault detection logic circuit and a pulse width modulation logic circuit, wherein the interface management logic circuit is used for receiving data information, address information and clock signals from the exterior, and the data information comprises positive pulse width P, negative pulse width N, dead zone time D, period T and the like; the channel control logic circuit mainly comprises a channel gate control register, a period control register and a frequency divider; the fault detection logic circuit is used for detecting whether the positive pulse width P, the negative pulse width N, the dead zone time D and the period T meet the relation of P+N+2D=T; and the pulse width modulation logic circuit is used for controlling the conversion of an internal state machine according tothe input positive pulse width P and negative pulse width N so as to output a corresponding PWM waveform signal for driving the motor to rotate correspondingly. The H-bridge motor controller realizesthe output of unipolar and bipolar pulse width modulation waveform signals so as to meet the dual application requirements for high precision and low power consumption.

Description

technical field [0001] The invention relates to a controller driven by an H-bridge motor, in particular to an H-bridge motor controller capable of realizing unipolar and bipolar pulse width modulation output. Background technique [0002] PWM pulse width modulation is a switching regulated power supply application, which is a technology that uses the digital output of a microcontroller to control an analog circuit. The biggest advantage of using pulse width modulation to realize motor speed regulation is that the energy of the power supply can be fully utilized and the efficiency of the circuit is high. In addition, the use of pulse width modulation can make the load obtain full power supply voltage during operation, which is beneficial to overcome the internal coil resistance of the motor and make the motor generate greater torque. Therefore, PWM pulse width modulation is the best way to digitally control DC motors, and has been widely used in DC motor speed regulation. ...

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Problems solved by technology

The applicant's previous application number is 200910251520.9, and the title is "A Motor Controller Based on H-Bridge Driver", which proposed a single-chip integrated circuit solution, but this patent only realizes bipolar modulation control mode, and cannot meet the requirements for unipolar modulation. The application requirements of control; and this scheme does not propose error state detection, which cannot meet the application requirements of high reliability systems

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