Method and device for determining rotating speed of motor and electronic equipment

A speed and rotor technology, applied in the direction of control of electromechanical transmission, estimation/correction of motor parameters, control of generators, etc., can solve problems such as low speed accuracy and poor axis error accuracy

Active Publication Date: 2020-11-20
SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, the patent application with the application number 201310192101.9 discloses a position sensorless control device and a position detection method. In this solution, the axis error is based on the estimated value of the voltage under the d-axis and the current under the d-axis , the estimated value of the current under the q-axis and the counter electromotive force constant, etc., there are certain errors in the voltage...

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  • Method and device for determining rotating speed of motor and electronic equipment
  • Method and device for determining rotating speed of motor and electronic equipment
  • Method and device for determining rotating speed of motor and electronic equipment

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Embodiment Construction

[0085] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.

[0086] It should be noted that the α-axis and the β-axis are fixed coordinate axes perpendicular to each other, the d-axis and q-axis are rotating coordinate axes perpendicular to each other, and the u-axis, v-axis and w-axis are 120-degree differences between any two axes. Motor three-phase fixed coordinate axis. The direction of the u-axis is consist...

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Abstract

The invention provides a method and device for determining a rotating speed of a motor and electronic equipment. The method comprises the steps of determining a current under an alpha axis and the current under a beta axis of the motor; determining a voltage of the motor under the alpha axis and the voltage of the motor under the beta axis; determining a back electromotive force under the alpha axis and a back electromotive force under the beta axis of the motor according to the current under the alpha axis, the current under the beta axis, the voltage under the alpha axis and the voltage under the beta axis; and estimating the rotating speed of the motor according to the back electromotive force under the alpha axis and the back electromotive force under the beta axis. The invention provides the method and device for determining the rotating speed of the motor, and electronic equipment, and the rotating speed of the motor can be estimated more accurately.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a method and device for determining the rotational speed of a motor, and electronic equipment. Background technique [0002] Axis error refers to the difference between the estimated value of the position of the motor rotor and the actual value of the position of the motor rotor. Using the axis error, the speed and position of the motor can be estimated. Whether the axis error is accurate will directly affect the estimated motor speed and location accuracy. [0003] In the prior art, the patent application with the application number 201310192101.9 discloses a position sensorless control device and a position detection method. In this solution, the axis error is based on the estimated value of the voltage under the d-axis and the current under the d-axis , the estimated value of the current under the q-axis and the counter electromotive force constant, etc., there are certain err...

Claims

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Application Information

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IPC IPC(8): H02P23/14H02P21/18
CPCH02P23/14H02P21/18
Inventor 涂小平陈跃王声纲朱绯高向军
Owner SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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