Bidirectional speed stabilizing controller for DC motor

Abstract

The invention relates to a bidirectional speed stabilizing controller for a DC motor, and belongs to the technical field of electronic application. The bidirectional speed stabilizing controller comprises a double input OR gate, a motor current controller, a high-speed junction-type field-effect transistor bidirectional operational amplifier, a DMOS full-bridge driving power stage, a divider resistor, a constant frequency waveform generator, and a socket, wherein the motor current controller combines signals such as a forward control signal, a reversed control signal, an enable signal, a speed input signal, a feedback signal and a pulse width modified wave duty ratio signal into a speed closed loop circuit; and after integration, pulse width modified wave signals PWM1 and PWM2 are output,are subjected to driving amplification of the DMOS full-bridge driving power stage and enabled by the enable signal; and finally, the DMOS full-bridge driving power stage outputs motor control signals PWM3 and PWM4 to control the magnitude and direction of the rotation of the motor. The bidirectional speed stabilizing controller ensures that the motor drives the load to rotate bidirectionally at a constant and stable speed, and has the characteristics of simple structure, convenient regulation, high precision, strong practicability and the like.

Description

Technical field [0001] The invention belongs to the technical field of electronic applications, and particularly relates to the design of a bidirectional speed steady-speed controller for a DC motor. technical background [0002] In recent years, with the development of power electronics technology and the progress of its application technology, as well as the continuous appearance of various special integrated components, the DC servo motor control technology has made significant progress, and its application range has become wider and wider, especially PWM servo control. Technology has received universal attention. [0003] At present, most of the controllers that use permanent magnet DC torque-speed measuring unit to drive the load at a constant speed and rotate at a steady speed are mostly complicated in design, high in cost, cumbersome to debug, and are susceptible to electromagnetic interference from the motor drive power level, and anti-interference ability This in turn aff...

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Problems solved by technology

[0003] At present, for the controllers that use the permanent magnet DC torque-tachometer unit to drive the load at a constant speed and steady rotation in two directions, most of the controllers are complex in design, high in cost, cumbersome in debugging, and are easily affected by electromagnetic interference from the power level of the motor drive. Poor, which in turn affects the precision requirements and work stability of the steady speed, which is not conducive to the wide application requirements. In view of the situation that the permanent magnet DC torque-tachometer unit is used to drive the load at a constant speed, steady speed, and two-way rotation, the invention designs a A Bidirectional Speed ​​Steady Speed ​​Controller for DC Motor

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