Efficient motion control system for electromotor fixed-frequency working condition and control method thereof

Abstract

An efficient motion control system for an electromotor fixed-frequency working condition and a control method thereof belong to the field of electromotor control and solve the problem how to improve the efficiency of the electromotor. The efficient motion control system comprises a multi-stage voltage regulating module which includes a plurality of voltage regulating modules with different controlrequirements. The plurality of voltage regulating modules are in cascaded connection. The input end of a three-phase power supply is connected with the power terminal VL of the control module, the power terminal VN of the control module and the multi-stage voltage regulating module. The multi-stage voltage regulating module is connected with the control module. The RS232-1 interface of the control module is connected to a display module. The control module comprises a voltage acquisition unit, a current acquisition unit and a power calculating unit. The voltage acquisition unit and the current acquisition unit are connected with the input end of the three-phase power supply. The power calculating unit calculates effective power according to the data acquired by the voltage acquisition unit and the current acquisition unit. The efficient motion control system can continuously adjust the input voltage of the electromotor in steps, reduce the running energy consumption of the electromotor, and improve the operating efficiency of the electromotor.

Description

technical field [0001] The invention belongs to the field of motor control, and in particular relates to a high-efficiency motion control system and a control method for a motor with a constant frequency working condition. Background technique [0002] Electric motors can be used to drive various equipment such as fans, pumps, and compressors, and are widely used in many fields such as industry, commerce, agriculture, utilities, and household appliances. The motor system includes the motor, the driven device, the transmission control system and the pipe network load, and the electricity consumption accounts for about 2 / 3 of the total electricity consumption of the society. Improving the energy efficiency level of the motor system is of great significance for building a resource-saving and environment-friendly society and promoting sustainable development. [0003] At present, the energy utilization rate of my country's motor system is about 10% to 30% lower than the interna...

AI Technical Summary

Problems solved by technology

[0004] The existing methods of controlling the motor include auto-coupling zero-point control mode, thyristor chopping and PWM voltage regulation mode; when the auto-coupling zero-point control mode adjusts the output voltage, it is necessary to switch the zero point of the autotransformer, each zero-point control The unit cannot achieve electrical and mechanical interlocking, and the reliability is low and the safety is poor; the thyristor chopper and PWM voltage regulation methods have high losses and large output voltage harmonics, and long-term operation will cause damage to the motor and lines to varying degrees. It will cause interference to the signals of other electronic devices and prevent them from working properly

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