Unlock instant, AI-driven research and patent intelligence for your innovation.

A Synchronous Motor Out-of-Step Detection Method

A technology of synchronous motor and detection method, which is applied in the direction of electronic commutation motor control, monitoring commutation, electrical components, etc., can solve the problems of motor reversal and motor rotor reversal, so as to prevent failure damage, improve safety, reduce loss effect

Active Publication Date: 2017-07-04
BYD CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. There is no rotating magnetic field after out of step: that is, the stator magnetic field and the rotor do not rotate
[0004] 2. The motor reverses after out of step: the motor rotor reverses due to load impact or other reasons

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
  • A Synchronous Motor Out-of-Step Detection Method
  • A Synchronous Motor Out-of-Step Detection Method
  • A Synchronous Motor Out-of-Step Detection Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0018] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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

A method for checking an out-of-step of a synchronous motor includes detecting electric degrees of the synchronous motor, in which the electric degrees comprise at least a first electric degree and a second electric degree detected at a preset interval, and the second electric degree is detected after the first electric degree; comparing the first electric degree with the second electric degree to obtain a comparing result; and determining that the synchronous motor is out of step when the comparing result satisfies a preset requirement. It is determined that the synchronous motor is out of step when the electric degree keeps unchanged or decreases progressively, or an increment of the electric degree is very small.

Description

technical field [0001] The invention relates to the technical field of motor control. In particular, it relates to a step-out detection method of a synchronous motor. Background technique [0002] The control methods of permanent magnet synchronous motor (PMSM) are divided into position sensor control and position sensorless control. For motor control with position sensor, the magnetic field position of the motor is determined by position sensor detection. The position of the rotor without position sensor control is estimated by the position estimation module in the software. Out of step is defined relative to synchronization, that is, the rotating magnetic field of the stator and the magnetic field of the rotor magnet are not synchronous. In the PMSM system, the system load is too high or the performance of the motor itself is degraded and other reasons will lead to out of step. After the motor out of step, its speed is generally uncontrollable, which will have serious co...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/18
CPCH02P6/12H02P6/182H02P6/34
Inventor 罗辉杜智勇周旭光张鑫鑫陈星肖恺程立品
Owner BYD CO LTD