Motor pole pair number identification system and vector control motor pole pair number identification method

Abstract

The invention provides a motor pole pair number identification system, and the system comprises an operation center, a driver and a position sensor. The driver comprises a power supply and a pluralityof metering bridge arms connected in parallel to the two ends of the power supply, each metering bridge arm is composed of two switching tubes connected in series, and the series connection positionof the two switching tubes in each metering bridge arm serves as the output end of the driver to be connected into the input end of a motor to be tested; the position sensor is fixedly installed on amotor to be measured, the operation center is provided with a plurality of PWM signal output ends, each PWM signal output end is correspondingly connected with the two ends of each metering bridge arm, and the output end of the driver and the position sensor are further connected into the input end of the operation center. The invention also provides a vector control motor pole pair number identification method. The method comprises a step of metering the motor pole pair number by using the metering system. By adopting the technical scheme, the number of pole pairs of the motor can be quicklymetered, the metering precision is high, the calculation process is simple, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a motor pole logarithm identification system and a vector control motor pole logarithm identification method. Background technique [0002] The motor is an important energy conversion device that can convert electrical energy into mechanical kinetic energy for the rotation of the motor shaft. Nowadays, the motor is widely used in various industrial sectors of the national economy. After the motor is manufactured and shipped out of the warehouse, the corresponding supplier will provide the motor pole However, in practical applications, due to lack of motor manuals and other reasons, users cannot know the number of motor pole pairs, and users urgently need to select the corresponding control mode for motor operation according to the number of motor pole pairs to achieve precise control. Purpose, at this time, the user urgently needs to measure the number of pole pairs of the motor. ...

AI Technical Summary

Problems solved by technology

[0002] The motor is an important energy conversion device that can convert electrical energy into mechanical kinetic energy for the rotation of the motor shaft. Nowadays, the motor is widely used in various industrial sectors of the national economy. After the motor is manufactured and shipped out of the warehouse, the corresponding supplier will provide the motor pole However, in practical applications, due to lack of motor manuals and other reasons, users cannot know the number of motor pole pairs, and users urgently need to select the corresponding control mode for motor operation according to the number of motor pole pairs to achieve precise control. Purpose, at this time, the user urgently needs to measure the number of pole pairs of the motor. In the prior art, there are two main methods for measuring the number of pole pairs of the motor. The first method is to install Hall sensor elements on the motor to be tested. , through the Hall sensor element to obtain a certain parameter when the motor is running. When the motor rotor rotates a circle, the number of changes in the parameter measured by the corresponding Hall sensor is the number of pole pairs of the motor. In this method, when the motor rotates very fast, The measurement accuracy is poor. The second method is to first measure the phase current when the motor is running, and draw the corresponding phase current time-varying curve, and then apply the Fourier transform method according to the phase current time-varying curve to obtain the motor through complex calculations. The number of pole pairs, this method takes a long time to calculate, and the labor intensity is high. Neither of the above two methods can quickly measure the number of pole pairs of the motor in the field application environment, so the scope of application is limited

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