High-voltage frequency converter model selection method based on simulation

Abstract

The invention discloses a high-voltage frequency converter model selection method based on simulation, a high-voltage frequency converter is used for starting a high-power motor load, and the method comprises the steps: constructing a simulation model which comprises an asynchronous motor, a high-voltage frequency converter coupled with the asynchronous motor, and a torque controller coupled withthe asynchronous motor; presetting a plurality of groups of rotating speed-torque characteristic parameters; according to the rotating speed-torque characteristic parameters, sequentially outputting arotating speed control signal and a torque control signal to the asynchronous motor by the high-voltage frequency converter and the torque controller to simulate starting of the asynchronous motor; acquiring data of motor starting characteristics in the starting process of the asynchronous motor, wherein the data of the starting characteristics at least comprises the following parameters: voltageand current of the asynchronous motor; and according to the obtained data of the starting characteristics, selecting a high-voltage frequency converter of a corresponding model to finish model selection.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a method for selecting a high-voltage frequency converter based on simulation. Background technique [0002] In the environment of the rapid development of modern industry, the application of high-voltage frequency converters in various industries has become quite common; among them, the application of high-voltage frequency converters in motor starting, when the motor is some large or even super-large high-voltage motors, choose There is no way to start with a suitable high-voltage frequency converter. In the prior art, for the selection of these large or even super-large high-voltage motors, the average value during the starting process of the motor is generally used to select the type, but this type selection method has the following defects: [0003] 1. The estimated average value cannot truly reflect the true magnitude of the current output by the motor during the sta...

AI Technical Summary

Problems solved by technology

[0003] 1. The estimated average value cannot truly reflect the true magnitude of the current output by the motor during the starting process;

[0004] 2. During the load starting process, with the fluctuation of the load torque, the peak value of the current flowing through the motor may exceed the current protection value of the high-voltage inverter;

[0005] 3. The voltage fluctuation of the high-voltage inverter will cause the current flowing through the motor to change during the starting process, and the estimated average value cannot reflect the impact of the starting process on the motor load;

[0006] 4. The mismatch in the selection of the high-voltage inverter will easily lead to the failure of the motor to start on site, which will affect the project progress and increase additional cost investment

Images