Research of the triggering mode of a 5.1 kW permanent magnet synchronous motor with a two-link frequency converter with a controlled rectifier and a two-level inverter for various types of load
Abstract
Research of the triggering mode of a 5.1 kW permanent magnet synchronous motor with a two-link frequency converter with a controlled rectifier and a two-level inverter for various types of load
Incoming article date: 15.05.2020The advantages of using frequency converters are well known. First of all, this is a significant energy savings due to the regulation of the rotational speed of the electric motor. In addition, ensuring a smooth frequency start using frequency converters significantly reduces thermal and mechanical loads when starting synchronous motors with a rotor excitation winding and with permanent magnets. In this paper, the start-up of a synchronous motor with a two-link frequency converter for various types of load was investigated. The following issues were considered: - creation of a three-phase two-link frequency converter model for a synchronous drive; - calculation of the torque on the shaft at rated power, as well as coefficients reflecting the nature of the load; - simulation of the start-up and operation of a synchronous motor and a two-link frequency converter with fan, conveyor and constant shaft loads. In conclusion, the model of a two-link frequency converter with a synchronous motor, which was researched in this paper, can be used in systems where the considered types of loads are used. This circuit has high energy characteristics, reliability and stability, and is also able to reduce the amplitude values of currents and time of transient processes at start-up
Keywords: two-link frequency converter, permanent magnet synchronous motor, mathematical model, reliability, PSIM