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

A full-order adaptive observation method of induction motor with back EMF as state

An induction motor, self-adaptive technology, applied in the field of motor parameter identification, can solve problems such as inability to guarantee system stability, and achieve the effect of ensuring stability

Active Publication Date: 2020-04-24
ZHEJIANG UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the parameter adaptive law designed in this way cannot guarantee the stability of the system under all working conditions, such as the power generation condition of the motor

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 full-order adaptive observation method of induction motor with back EMF as state
  • A full-order adaptive observation method of induction motor with back EMF as state
  • A full-order adaptive observation method of induction motor with back EMF as state

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] The present invention will be further elaborated below in conjunction with accompanying drawings and examples.

[0045] see figure 1 , the strong current part, the three-phase AC power supply is uncontrolled rectified to obtain the DC bus voltage U dc , to supply the voltage source inverter, and then obtain the three-phase power supply for the induction motor.

[0046] The weak current part adopts vector control mode, including voltage and current sensors, 3-phase / 2-phase static Clarke coordinate transformation module, 2-phase static / 2-phase synchronous speed coordinate transformation module, rated excitation current and sine wave component given module, the present invention The designed observer module, parameter adaptive law module, speed loop PI module, current loop PI module, 2-phase synchronous speed / 2-phase static coordinate transformation module, voltage space vector pulse width modulation module.

[0047] 1. The current and voltage of each phase of the three-...

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 full-order adaptive observation method of an induction motor taking a counter potential as a state. The full-order adaptive observation method is implemented according to the steps of firstly, defining a group of new state variables; secondly, calculating a regression item and a feedback correction item; thirdly, updating values of the state variables; and finally, calculating an observation error according to a measurement current to update a parameter. By the method, the stator resistance, the rotor resistance and the rotational speed of the motor can be identified only by measuring a motor current.

Description

technical field [0001] The invention discloses a full-order self-adaptive observer for an induction motor with counter electromotive force as a state, and particularly relates to a full-order self-adaptive observer for an induction motor with counter electromotive force as a state for self-adaptive stator resistance, rotor resistance and rotational speed , which belongs to the field of motor parameter identification. Background technique [0002] In the drive system of cage induction motor, the speed sensorless control is usually realized by full-order observer. The traditional full-order observer will encounter some theoretical difficulties when designing a multi-parameter adaptive law, that is, there will be an estimation error term of flux linkage in the parameter adaptive law. However, since the flux linkage of the motor is generally difficult to measure , and the corresponding flux linkage estimation error is also unknown. If the flux linkage estimation error in the p...

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): H02P21/13H02P21/14H02P21/18H02P21/22
CPCH02P21/0017H02P21/13H02P21/14H02P21/18H02P21/26H02P2207/01
Inventor 黄进陈嘉豪叶明
Owner ZHEJIANG UNIV