| High-quality dynamic electric drive load simulator is a typical load test required important equipment, electric drive load simulation system is a load simulation of a new direction, and therefore on the realization and control of load simulation system to study great important value. This paper analyzes the motor in the actual operation of the typical load types, in order to achieve accurate simulation of the load, the system uses magnetic brake as a load simulation elements. The use of magnetic brake torque characteristics, design and implementation of a common motor load simulation platform. However, due to the nonlinear characteristics of magnetic hysteresis brake material itself, so that it loads accuracy and dynamic response exist certain errors. In view of this, this article from magnetic brake torque characteristics, analyzes the electrical operating characteristics of magnetic brakes and magnetic brakes established model, in actual operation, the use of PLC as a controller realized the magnetic brake control, to achieve a given Constant speed torque output, completing the development of magnetic brake simulated load platform. Drive motor simulation load platform using permanent magnet synchronousmotors, from the basic laws of electromagnetic permanent magnet synchronous motor, it analyzes the operating principle, speed characteristics and control methods. UnityPro environment established in the quasi-linear model of permanent magnet synchronous motor. The test results show that the system basically meet design requirements.Test Lab product development last essential link for the inspection of product quality, product performance testing has an important role, full and rigorous testing laboratory can find flaws and weaknesses in the system in advance, allowing researchers to make targeted improve, as far as delivered to the user prior to product improvement, improving its reliability and safety in use with the power electronics technology and mechanical load simulation and monitoring systems development, in the laboratory environment, usually requires the use of mechanical simulation load to complete the performance test electric drive system. On the basis of in-depth study load simulation system function and structure design of the proposed integer load simulation system in order to achieve a common load characteristic simulation, we designed a mechanical load simulation and monitoring system of the PLC, the system comprises based PLC with CANopen communication interface and analog output interfaces, with the drive CANopen interface, the main function modules AC motor and coaxial magnetic brakes, magnetic brake control circuit. This paper analyzes the actual operation of the motor in several class load, this experiment with magnetic brakes to achieve a load simulation element constant torque load, constant power load characteristics and fan pump load. The main work is as follows:(1) the composition of the program electric drive and load simulation system based on simulated industrial network load composition and magnetic brake(2) The magnetic brake control power supply design(3) Design of PLC-based industrial network control software(4) Analog negative in the electric drive system based on performance testingThe test results show that the system basically meet design requirements. |
