Motor parameter detection method and motor parameter detection apparatus

A technology of motor parameters and detection methods, applied in the direction of motor generator testing, etc., can solve difficult problems such as voltage errors and errors, achieve high accuracy, improve work efficiency, and reduce calculation steps

Active Publication Date: 2012-04-25
PEITIAN ROBOTICS CO LTD
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  • Application Information

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Problems solved by technology

However, in practical applications, due to the nonlinearity of switching devices, it is difficult to accurately compensate for voltage errors
Another way to reduce the influence of the voltage error i

Method used

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  • Motor parameter detection method and motor parameter detection apparatus
  • Motor parameter detection method and motor parameter detection apparatus
  • Motor parameter detection method and motor parameter detection apparatus

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] The invention relates to a motor parameter detection method, which makes one phase winding of the motor open;

[0024] The step of detecting the stator resistance of the motor: apply a pulsed DC voltage between the other two phases of the motor to detect the stator resistance of the motor;

[0025] The step of detecting the time constant of the motor rotor: apply a step DC voltage between the other two phases of the motor, measure the current value at differ...

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Abstract

The invention discloses a motor parameter detection method and a motor parameter detection apparatus. The motor parameter detection method comprises the following steps that: open circuit is carried out on a phase winding of the motor; a motor stator resistance detection step is realized; that is, a pulse direct current voltage is applied between other two phases of the motor and the motor stator resistance is detected; and a motor rotor time constant detection step is realized; that is, a stepped direct current voltage is applied between the other two phases of the motor; different time and current values of the time are measured as well as a current-time linear equation is obtained; a current value at zero time and the motor stator resistance are introduced into the current-time linear equation to obtain an approximate value of the rotor time constant. According to the invention, a motor parameter detection method and a motor parameter detection apparatus are provided on the condition that an induction machine rotor is in a static state; and high accuracy of motor parameter detection can be realized only by successively applying currents or voltages at different frequencies between two phases of the motor as well as reducing voltage errors and an influence of a sink effect.

Description

technical field [0001] The invention relates to a motor parameter detection method and a motor parameter detection device. Background technique [0002] The induction motor has the advantages of simple structure, no winding on the rotor, convenient manufacture, cheap price, simple maintenance, long service life, etc., so it is widely used. With the development of power electronics technology and modern control theory, high-performance induction motor speed control system came into being. Generally, the high-performance induction motor speed control system often uses the vector control algorithm of the inverter or the speed sensorless algorithm, and the performance of these motor control algorithms depends on the accuracy of the motor parameters used. If the motor parameters are not accurate, It will directly lead to the decline of the control performance index or even the failure of the inverter. Therefore, how to accurately obtain the parameters of the induction motor bec...

Claims

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Application Information

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IPC IPC(8): G01R31/34
Inventor 刘葵
Owner PEITIAN ROBOTICS CO LTD
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