Hall-free method for starting servo motor

A technology of servo motor and electrical angle, applied in the direction of electronic commutator, starting device, etc., can solve the problems of sewing machine not running and motor not starting, etc., and achieve the effect of high production efficiency and simple and convenient operation

Inactive Publication Date: 2013-06-26
陕西银星科技有限公司
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and provide a servo motor starting method without a hall. By performing a perturbation test on the servo motor, the position of the rotor is judged by the output of the encoder so that it turns to a co...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hall-free method for starting servo motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] A method for starting a servo motor without a hall of the present invention comprises the following steps:

[0018] Step 1, the method is to provide the torque base vector in turn by perturbing the servo motor;

[0019] Step 2. According to the steering result fed back by the incremental encoder, determine the electrical angle sector where the rotor is located at this time, and give the initial value of the electrical angle, and then transfer to conventional field-oriented control; this method only needs to A small perturbation test when the power is turned on will hardly affect any normal operation of the sewing machine, so it is suitable as an emergency treatment method when a hall sensor is damaged and the sewing machine cannot be used.

[0020] Such as figure 1 As shown, a hallless servo motor starting method, the specific steps are:

[0021] 1) The motor divides the initial position of the rotor into 6 areas, and the voltage vectors corresponding to 0, 1, 2, 3, 4...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a hall-free method for starting a servo motor. The hall-free method includes steps of firstly, perturbing the servo motor and sequentially providing basic torque vectors; and secondly, judging an electric angle sector where a rotor is currently located according to a turning result fed by an incremental encoder, providing an electric angle initial value and switching the rotor to be under conventional field-oriented control. Only a tiny perturbation test is required when the motor is electrified and started for the first time, normal operation of a sewing machine is hardly affected, and accordingly the method can be used as an emergency treatment method when the sewing machine cannot be used due to damage of a hall sensor. The hall-free method has the advantages that the perturbation test is carried out for the servo motor, and the location of the rotor is judged by the aid of output of the encoder, so that the rotor can be switched to be under the conventional field-oriented control, the motor is started, operation is simple and convenient, and the production efficiency is high.

Description

technical field [0001] The invention relates to the technical field of industrial sewing machine control systems, in particular to a method for starting a servo motor without a hall. Background technique [0002] The industrial sewing machine servo motor code disc is generally equipped with 3 hall sensors and an incremental encoder, where the hall sensor is used for motor startup. The rotor of the servo motor is made of permanent magnets, the commutation of the stator winding is used instead of the commutation of the brush, and the position information of the rotor is sensed by the hall element. The built-in 3 hall elements will output 3 determined voltage signals in real time to represent the rotor position information. The digital control circuit realizes the selective conduction of the drive circuit according to different voltage signals, so that the coil generates a magnetic torque that excites the rotor to rotate. In one cycle, each MOS transistor is turned on for 120°...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H02P6/20H02P6/18
Inventor 易萍虎
Owner 陕西银星科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products