Motor-pump integrated parameter identification method for asynchronous motor

Abstract

The invention provides an asynchronous motor and pump integrated parameter identification method, which comprises the following steps of: 1, establishing an asynchronous motor state equation and a pump load torque equation according to pump coincidence characteristics, and describing the operation condition of a motor and a pump by using the equations; by analyzing the active and reactive characteristics of the pump load and distinguishing the constant torque load, the pump load can be effectively distinguished; and 3, a particle swarm parameter identification method is established, so that integrated identification of the pump is realized, a large number of calculation steps are omitted, and the result is more accurate. According to the method, machine-pump integrated identification of the asynchronous motor can be realized, the identification result is more accurate, and the accuracy of overall modeling of the system is improved.

Description

technical field [0001] The invention belongs to the field of parameter identification of asynchronous motors, and in particular relates to a parameter identification method for machine-pump integration. Background technique [0002] With the development of science and technology, more and more electrical equipment has appeared in people's living and production environments, and has become the basis of industrial manufacturing in contemporary society. Among them, the three-phase asynchronous motor is currently the most used electrical equipment, and it is used in many fields such as chemical industry, smelting, and mechanical production. The use of multiple fields also brings more energy consumption. According to the statistics of relevant departments, the annual power consumption of asynchronous motors accounts for more than 60% of the total energy consumption of the whole society, and it is the most energy-consuming basic production facility. It is estimated that reducing ...

AI Technical Summary

Problems solved by technology

Usually, the parameters of the asynchronous motor are calculated from the parameters on the nameplate. However, with the long-term operation of the asynchronous motor, some parameters of the motor will change, and the accurate parameters of the asynchronous motor cannot be calculated from the data on the nameplate.

The traditional parameter test method is to obtain the motor parameters through the no-load test and the locked-rotor test. The accuracy of the obtained motor parameters is not high, which cannot meet the current high-performance requirements for the motor, and the motor needs to be out of the running state, which cannot realize online identification.

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