Sensor-less control device and control method of sectional-winding linear motor

A segmented linear control device technology, applied in the direction of motor generator control, AC motor control, electromechanical transmission control, etc., can solve the problem that the sensorless control of ordinary high-speed motors cannot be controlled by winding segmented linear motors, etc.

Active Publication Date: 2012-06-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the conventional common high-speed motor sensorless control method cannot be us

Method used

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  • Sensor-less control device and control method of sectional-winding linear motor
  • Sensor-less control device and control method of sectional-winding linear motor
  • Sensor-less control device and control method of sectional-winding linear motor

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specific Embodiment approach 1

[0080] Specific implementation mode one: the following combination Figure 1 to Figure 6 Describe this embodiment, the sensorless control device of the winding segmented linear motor in this embodiment, the length of each stator segment of the linear motor is greater than the length of the linear motor mover along the moving direction, and it is characterized in that: The first intelligent power module 1-1, the second intelligent power module 1-2, the first current sensor 2-1, the second current sensor 2-2, the optical isolation driver 3, the logic signal processing and latch 4 and the micro The controller consists of DSP5,

[0081] The microcontroller DSP5 is composed of the first current signal sampling processing unit 5-11, the second current signal sampling processing unit 5-12, the first Clark transformation unit 5-21, the second Clark transformation unit 5-22, the first Park transformation unit 5-31, the second Park transformation unit 5-32, the first back EMF observer ...

specific Embodiment approach 2

[0093] Specific implementation mode two: the following combination figure 2 This embodiment is described. This embodiment is a further description of Embodiment 1. The first back EMF observer 5-41 and the second back EMF observer 5-42 in this embodiment are state observers.

specific Embodiment approach 3

[0094] Specific implementation mode three: the following combination image 3 This embodiment is described. This embodiment is a further description of Embodiment 1. The first back EMF observer 5-41 and the second back EMF observer 5-42 in this embodiment are synovium observers.

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Abstract

The invention discloses a sensor-less control device and a control method of a sectional-winding linear motor, belonging to the technical field of linear motor control. According to the invention, the problem that the conventional sensor-less control method for a common high-speed motor cannot be applied to the control on a sectional-winding linear motor is solved. The control device consists of a first intelligent power module, a second intelligent power module, a first current sensor, a second current sensor, an optical isolation driver, a logical signal processing and latching device and a micro controller DSP (digital signal processor). The control method comprises the following steps of: according to the non-periodic change characteristics of the three-phase back electric potential of adjacent two armature segments of the sectional-winding linear motor, detecting a three-phase current signal in the adjacent two segments of armature windings through the current sensors, and calculating a three-phase voltage signal of the adjacent two segments of armature windings; performing sampling processing; and extracting the variable characteristics in the change process of the non-periodic signal to obtain the characteristic value of the electric potential signal and obtain the accurate position and speed information of a rotor. The device and method disclosed by the invention are suitable for controlling a linear motor.

Description

technical field [0001] The invention relates to a sensorless control device and a control method for a segmented winding linear motor, belonging to the technical field of linear motor control. Background technique [0002] Linear motors do not require an intermediate conversion mechanism, and can directly convert electrical energy into mechanical energy for linear motion to directly drive the system. They can be used in carrier-based aircraft ejection take-off, rocket and satellite launches, scientific experiments, interstellar navigation, and oil extraction equipment. , with great operational advantages and application potential. [0003] Linear motors are divided into two types: short primary and long secondary and long primary and short secondary. The former has certain advantages in short stroke occasions, but it will cause the problem of dragging the cable wire when the secondary moves. The short secondary linear motor does not have these disadvantages, but its primary...

Claims

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Application Information

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IPC IPC(8): H02P25/06H02P6/18H02P21/24
Inventor 李立毅祝贺马明娜刘家曦
Owner HARBIN INST OF TECH
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