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Servo system for linear motor

A linear motor and servo system technology, applied in the field of linear motor servo system and linear motor, can solve the problems of large gap, limited test data, lack of comparative data and production experience, etc., and achieve the effect of high processing speed

Inactive Publication Date: 2010-04-21
SHANGHAI DIANJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research and application of domestic linear motors are still in their infancy, and most of the research stays at the stage of simulation and experimentation. The test data is very limited, and there is a lack of comparative data and production experience. Compared with foreign countries, there is a big gap.

Method used

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  • Servo system for linear motor
  • Servo system for linear motor
  • Servo system for linear motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] see figure 1 , the present invention discloses a linear motor servo system, including a linear motor 20 and a linear motor driver 10 . Such as figure 1As shown, the linear motor driver 10 includes a digital signal processor 1, a switching power supply 2, a motor feedback position acquisition unit 3, a motor feedback speed calculation unit 4, a motor feedback current acquisition unit 5, a position loop calculation unit 6, and a speed loop calculation unit 7 , a vector control unit 8, and a drive circuit 9. The digital signal processor 1 and the switching power supply 2 are respectively connected with other units.

[0038] 【Digital Signal Processor DSP】

[0039] The digital signal processor DSP is used to control the position loop, speed change circuit and current loop of the linear motor. The interior of the DSP chip adopts the Harvard structure that separates the program and data, has a special hardware multiplier, widely uses pipeline operations, and provides speci...

Embodiment 2

[0089] In this embodiment, in order to read the position and speed of the mover, HEIDENHAIN incremental grating scale LS1378C is installed on the stator side of the linear motor. The signal period is 1um, that is, the mover stroke of 1mm can feedback 1000 pulses. The pole pitch of the linear motor is 32mm, and one electric distance corresponds to 32000 pulses.

[0090] In order to be able to read the initial stop state of the mover in the power-on state, a Hall device relatively fixed to the mechanical position of the mover coil is installed on the mover side.

[0091] There are generally four speed detection methods: M method, T method, M / T method and variable M / T method, among which the last detection method has the highest accuracy.

[0092] The variable M / T method not only measures the pulse M1 of the encoder and the high-frequency clock pulse M2, but also the measurement time TC is also changing. The purpose is to always keep TC as the sum of the complete encoder pulse si...

Embodiment 3

[0099] see Figure 3-Figure 6 The difference between this embodiment and the above embodiments is that in this embodiment, the system of the present invention includes a parameter management module. Servo driver parameters are divided into user parameters (Table 1 is the user parameter table of this embodiment), system parameters and development parameters, and different levels are managed through passwords. In addition to observing and modifying parameters of this level, high-level passwords can also perform the same operations on low-level parameters.

[0100] Preface

No

name

Applicable party

Mode

parameter range

Factory default

unit

0

password

P, S

0～9999

315

1

Drive model

P, S

0～19

0*

2

Software version (read only)

P, S

*

*

3

initial display state

P, S

0～20

0

4

control mode se...

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PUM

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Abstract

The invention discloses a servo system for a linear motor. The servo system comprises a linear motor and a linear motor driver, wherein the linear motor driver comprises a DSP, a switch power supply, a drive circuit, a motor feedback position acquisition unit, a motor feedback rotary speed computing unit, a motor feedback current acquisition unit, a position ring computing unit, a speed ring computing unit, and a vector control unit, wherein the DSP controls a position ring circuit, a speed ring circuit and a current ring circuit of a linear motor; the motor feedback position acquisition unit obtains the actual position of a motor rotor; the motor feedback rotary speed computing unit works out the actual rotary speed of the motor according to the actual position of the motor rotor and the measuring time; and the motor feedback current acquisition unit samples by a resistor, sends the sample to an AD converter through linear opto coupling insulation, and sends the sampling signal to the DSP through a serial port after converting to the analogue signal to the digital signal. The servo system adopts a structure integrating power supply, drive and control, and mixes strong current signals and weak current signals, so that the servo system can avoid the interference among various signals of strong current, weak current, switch power supply and the like.

Description

technical field [0001] The invention belongs to the technical field of industrial testing and relates to a linear motor, in particular to a linear motor servo system. Background technique [0002] At present, the production technology and application technology of linear motors and their drives are in the development stage in industrially developed countries, and as a brand-new feeding method, it shows great vitality. More than ten famous companies in western countries have produced different Types and models of linear motors and drives. [0003] American An orad company is one of the largest suppliers of linear motors in the world. It has been developing linear motors since the early 1980s. The leading products are sine wave permanent magnet AC linear motors and square wave brushless DC linear motors. Its application A typical example is the HVM800 high-speed horizontal machining center produced for the Ingersoll Milling Machine Company of the United States in the 1990s an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P6/16H02P21/14H02P21/00H02P21/18H02P25/064
Inventor 齐亮刘军
Owner SHANGHAI DIANJI UNIV
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