Method for measuring motor parameter

Abstract

The invention discloses a method for measuring a motor parameter. The method comprises the following steps that: A) a power supply device is provided so as to be electrically connected with an induction motor; B) the power supply device provides a driving electricity so as to be switched-on to the induction motor so that the induction motor is accelerated to a stable rotate speed from the static starting in an unloaded manner, and simultaneously detects and records a start instantaneous current and a start instantaneous voltage when the induction motor is accelerated to the stable rotate speed from the static starting; C) the power supply device stops providing the driving electricity so that the induction motor is decelerated to the static from the stable rotate speed, and simultaneously detects and records a power-off instantaneous current and a power-off instantaneous voltage when the induction motor is decelerated to the static from the stable rotate speed; and D) the start instantaneous current, the start instantaneous voltage, the power-off instantaneous current and the power-off instantaneous voltage are provided to a computation system so as to compute the parameter of the induction motor.

Description

technical field [0001] The invention relates to a method for measuring electrical parameters, in particular to a method for measuring parameters of an induction motor. Background technique [0002] After years of development, the induction motor has developed many variations in order to make the induction motor suitable for various machines. Various types of induction motors have different output characteristics. In order to ensure that the manufactured induction motor has the correct characteristics, it is necessary to understand the equivalent model of the induction motor on the circuit. The data during operation is used to further calculate the equivalent circuit type. After knowing the equivalent circuit type of the induction motor after power-on, you can further understand the characteristics and shortcomings of the motor, and make an induction motor with more accurate and stable output. [0003] And the known measurement method has the No. 298620 of Chinese Taiwan Pa...

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Problems solved by technology

[0008] It can be seen from the aforementioned prior art that traditionally, if one wants to obtain the complete parameters of an induction motor, one needs to rely on an external detection device or a control circuit, which requires multiple steps of measurement, which is too complicated

[0009] Furthermore, industrial induction motors are large in size and weight, so it is not easy to move the induction motor, and professional measuring equipment and computer equipment are not easy to move

Therefore, in practice, the aforementioned previous patents are difficult to apply to on-site measurement

In the case that the parameters of the induction motor cannot be easily measured, the operator in the factory can only know some parameters of the induction motor according to the nameplate of the induction motor, and cannot measure the actual performance of the induction motor after starting

It is impossible to directly measure the parameters of the induction motor on the factory production line, and it is also impossible to know the wear state of the induction motor after use

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