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Rail transit vehicle door sensorless motor control method and system

A rail transit and motor control technology, applied in AC motor control, AC motor direction control, control system, etc., can solve problems such as the door cannot be opened or closed normally, the magnetic field interference of the encoder signal, and the disconnection of the encoder line, etc., to achieve Avoid abnormal motor control, reduce board size, and simple structure

Pending Publication Date: 2022-04-05
NANJING KANGNI ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the encoder signal in the traditional car door control method is susceptible to magnetic field interference, the encoder wire is broken, etc., the motor control is abnormal, the door cannot be opened or closed normally, which seriously affects the operation of the train, and a position sensorless control of the door motor is proposed. method

Method used

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  • Rail transit vehicle door sensorless motor control method and system
  • Rail transit vehicle door sensorless motor control method and system
  • Rail transit vehicle door sensorless motor control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for controlling a position sensorless motor of a rail transit vehicle door, comprising:

[0045] Obtain the door switch information and train signal, and judge whether the motor has forward or reverse running demand according to the door switch information and train signal command;

[0046] In response to a request for forward or reverse rotation of the motor,

[0047] Calculate the given current of the motor based on the given speed of the motor;

[0048] Based on the given speed of the motor, determine whether the motor is running forward or reverse, and determine the switching direction of the rotor position;

[0049] Based on the given speed of the motor, the rotor position switching cycle is determined by finding the motor speed and the rotor position switching cycle state machine;

[0050] performing automatic rotor position switching and motor commutation control signals according to the rotor position switching direction and the rotor position switchi...

Embodiment 2

[0063] A sensorless motor control device for a rail transit door, including a memory; and

[0064] A processor coupled to the memory, the processor is configured to execute the method for controlling a door position sensorless motor of a rail transit vehicle as described in Embodiment 1 based on instructions stored in the memory.

Embodiment 3

[0066] A rail transit vehicle door position sensorless motor control system, comprising the rail transit vehicle door position sensorless motor control device described in Embodiment 2, further comprising:

[0067] The current sampling module is configured to collect the actual current of the motor and send it to the control device;

[0068] The motor drive module is configured to receive the PWM control signal output by the control device, and control the rotation of the motor according to the PWM control signal.

[0069] In some embodiments, the control device includes:

[0070] The EMI circuit is configured to filter the input power of the train, and provide the filtered power to the DC-DC circuit and the motor drive module;

[0071] The DC-DC circuit converts the power to the control power required by the CPU and the control system for use by the CPU and the control system;

[0072] The CPU receives train signals, door switch signals, and current sampling signals, and se...

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Abstract

The invention discloses a rail transit vehicle door sensorless motor control method and system, and the method comprises the steps: responding to a forward or reverse operation demand of a motor, and obtaining a motor given current through calculation based on a motor given rotation speed; calculating to obtain a rotor position switching direction based on a given rotating speed of the motor according to a rotor position switching rule; based on the given rotating speed of the motor, determining a rotor position switching period by searching the rotating speed of the motor and a rotor position switching period state machine; according to the rotor position switching direction and the rotor position switching period, performing automatic switching of the rotor position and a motor commutation control signal; obtaining the actual current of the motor, and obtaining a PID control signal through a current loop control algorithm based on the given current of the motor and the actual current; and obtaining a PWM control signal according to the PID control signal and the motor commutation control signal, and outputting the PWM control signal to realize rotation control of the motor. A position sensor is not needed, and the vehicle door position-sensorless motor control system is provided.

Description

technical field [0001] The invention relates to a sensorless motor control method and system for rail transit doors, belonging to the technical field of rail transit intelligent control. Background technique [0002] With the acceleration of urbanization in our country, the demand for urban traffic has increased sharply. As the main body of urban rail transit, urban rail transit vehicles have a large number of door control devices and are frequently used. Maintainability puts forward higher and higher requirements for the miniaturization, light weight, reliability and maintainability of the door. The traditional door control system consists of a door controller (referred to as the door controller) and a motor body. The motor body includes a reducer, a motor winding, and an encoder. The door controller and the motor body are connected by a motor wire. three-phase line, encoder signal line. When the motor line of some projects is long, the encoder signal is easily disturbed ...

Claims

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Application Information

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IPC IPC(8): H02P6/28H02P6/30H02P23/00H02P23/14H02P23/24H02P27/08
Inventor 袁娜周洲李景虎朱峰邱海兵张祥任洁许洪强
Owner NANJING KANGNI ELECTRONICS TECH
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