Device and system for controlling deviation correction of brushless direct current (DC) motor

Abstract

The invention discloses a device and system for controlling deviation correction of a brushless direct current (DC) motor. The device comprises a deviation correcting sensor, a deviation correcting controller and a deviation correcting actuator which are connected in sequence, wherein the deviation correcting sensor is used for acquiring the advancing positions of the materials; the deviation correcting controller is used for acquiring the deviation correcting sensor data and controlling the action of the deviation correcting actuator; the deviation correcting actuator is used for pulling the materials back to the normal positions and comprises the brushless DC motor; the deviation correcting controller comprises a coding disc detection module, a current detection module, a digital signal processor (DSP), a pulse width modulation (PWM) level converting circuit module and a power drive module; the DSP drives the deviation correcting actuator to work via the PWM level converting circuit module and the power drive module; and the DSP ensures a coding disc to carry out closed loop switch in various states according to the state of the coding disc of the motor and the rotation speed value of the motor. The device and the system can be accurately positioned through state switching of a coder under the premise of not adopting limit switches and can implement closed loop control along with the rotation speed of the brushless DC motor.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a deviation correction control device and system for a DC brushless motor. Background technique [0002] In the deviation correction control system, DC servo motor or stepper motor is generally used as the power source. The Chinese invention patent application number is: "200810163875.8", and the name is: "Position tracking type deviation correction servo actuator", which discloses a position tracking type deviation correction servo actuator, which uses a DC servo motor as the actuator, and its power shaft is connected to the The shaft is connected with the ball screw, the nut of the screw is connected with the hollow push rod which is set outside the screw, and the nut of the screw is connected with the linear guide rail to convert the rotary motion of the motor into the linear motion of the push rod; A circular code disc is installed on the shaft, and the code disc rotates in the gr...

AI Technical Summary

Problems solved by technology

The main problems are: the non-standard motor needs to be customized; the price of an additional encoder is close to the price of a brushless motor; it is only used for positioning and cannot achieve position following closed-loop control

[0005] Second, the motor uses a carbon brush, because the carbon brush is easy to wear, and the motor frequently works in positive and negative directions when used in the deviation correction system

The method adopted by the stepper motor is: most of them use photoelectric or Hall switch sensors, and the sensors are installed at the two limit positions and the center position, which is inconvenient to install, difficult to debug and operate, and affects the appearance

[0008] Second, when the stepping motor is working, the temperature of the motor casing rises rapidly, causing severe heat generation and low energy efficiency

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