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Measuring method and measuring device for moment of inertia of motor, and motor control system

A technology of moment of inertia and measurement method, which is applied in the direction of motor generator control, vector control system, electronic commutation motor control, etc., can solve the problems of high measurement cost and difficult operation, and achieve low measurement cost, easy realization and accurate rotation The effect of inertia

Active Publication Date: 2018-09-11
GD MIDEA AIR CONDITIONING EQUIP CO LTD
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  • Abstract
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Problems solved by technology

However, this method requires the use of complex testing tools such as photoelectric encoders and precise time measuring instruments. The measurement cost is high, and the operation of starting and stopping the motor is difficult to operate in engineering practice.

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  • Measuring method and measuring device for moment of inertia of motor, and motor control system
  • Measuring method and measuring device for moment of inertia of motor, and motor control system
  • Measuring method and measuring device for moment of inertia of motor, and motor control system

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Embodiment Construction

[0040] 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.

[0041]The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate...

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Abstract

The present invention discloses a measurement method of a motor rotational inertia, a measurement device of the motor rotational inertia and a motor control system. When a motor is located in no-load or light load operation, the measurement method of the motor rotational inertia comprises the following steps of obtaining a preset straight axis reference current and a preset quadrature axis reference current within a preset time quantum, and controlling the rotating speed of the motor to accelerate with a preset angular acceleration; sampling a DC of the motor at a preset sampling point of the preset time quantum to obtain a sampling current, and calculating an electromagnetic torque of the motor according to the sampling current; calculating the rotational inertia of the motor according to the electromagnetic torque and the preset angular acceleration. The rotational inertia measurement method of the present invention can obtain the more accurate rotational inertia, is simple to operate and easy to realize, is low in measurement cost, and can be applied to the engineering practice.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a method for measuring the moment of inertia of a motor, a device for measuring the moment of inertia of a motor, and a motor control system. Background technique [0002] With the development and maturity of vector frequency conversion control technology, more and more equipment is equipped with variable frequency drives to drive the operation of motors. For example, household air conditioners, kitchen appliances, washing machines, refrigerators, elevators and other equipment are equipped with variable frequency drives. However, when the variable frequency drive uses vector control technology to drive the motor, it has a strong dependence on the parameters of the motor. If the parameters of the motor are inaccurate, it will have a great impact on the driving performance, energy saving effect, and start-up characteristics of the motor. Usually the motor manufacturers will give th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14
Inventor 陈毅东张国柱
Owner GD MIDEA AIR CONDITIONING EQUIP CO LTD
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