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A method and device for obtaining motor moment of inertia

A technology of moment of inertia and speed, applied in the electronic field, can solve problems such as inaccurate motor control and errors

Active Publication Date: 2018-03-23
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the environment of testing the specification parameters is different from the actual application of the motor, which will lead to a large or small error between the moment of inertia given in the specification parameters and the actual moment of inertia
The error between the given moment of inertia and the actual moment of inertia will lead to technical problems of inaccurate control of the motor

Method used

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  • A method and device for obtaining motor moment of inertia
  • A method and device for obtaining motor moment of inertia
  • A method and device for obtaining motor moment of inertia

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Embodiment Construction

[0044] Embodiments of the present application provide a method and a device for obtaining the moment of inertia of a motor, which are used to obtain the moment of inertia of the motor.

[0045] The general idea of ​​the technical solution provided by this application is as follows:

[0046] In the technical solution of the embodiment of the present application, firstly, the (n-1)th actual speed of the motor in the (n-1)th cycle and the (n-1)th estimated speed output by the adjustable model corresponding to the motor are obtained. Wherein, the n-1th estimated rotational speed is the rotational speed output by the adjustable model based on the calculation result of the n-1th round; n is a positive integer. Then, according to the n-1th actual rotation speed and the n-1th estimated rotation speed, the nth round of calculation results are obtained, and the nth round of calculation results include the nth moment of inertia related quantities. Next, judge whether the nth moment of i...

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Abstract

The embodiments of the invention provide a method and a device for obtaining the rotational inertia of a motor. The method comprises: obtaining (n-1) actual rotational speed of the motor in the (n-1) period, wherein n is a positive integer; obtaining (n-1) derived rotational speed output by an adjustable model corresponding to the motor, wherein the (n-1) derived rotational speed is output by the adjustable model based on an (n-1) calculation result; obtaining an n calculation result according to the (n-1) actual rotational speed and the (n-1) derived rotational speed, wherein the n calculation result includes n rotational inertia related quantity; judging whether the n rotational inertia related quantity and the (n-1) rotational inertia related quantity in the (n-1) calculation result satisfy a preset relation or not; and when the n rotational inertia related quantity and the (n-1) rotational inertia related quantity satisfy the preset relation, determining n rotational inertia corresponding to the n rotational inertia related quantity as the actual rotational inertia of the motor.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method and a device for obtaining the moment of inertia of a motor. Background technique [0002] The moment of inertia is an important parameter of the motor. At present, when controlling the motor, the moment of inertia in the specification parameters provided by the motor manufacturer is usually directly used. However, the moment of inertia is not a constant value, it is related to the actual operating conditions of the motor. For example, if the motor is operated with and without fan blades, the moment of inertia in the two cases is very different. Therefore, the difference between the environment of testing the specification parameters and the actual application of the motor will lead to a large or small error between the moment of inertia given in the specification parameters and the actual moment of inertia. The error between the given moment of inertia and the ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M1/10
CPCG01M1/10
Inventor 陈跃刘启武唐婷婷
Owner SICHUAN CHANGHONG ELECTRIC CO LTD