Harmonic suppression device and method, control unit, electric appliance and storage medium

Abstract

The invention provides a harmonic suppression device and method, a control unit, a power supply device, an electrical device and a storage medium, and relates to the technical field of motors. The harmonic suppression device comprises a tuning circuit module which is connected with a first live wire and a second live wire of a three-phase power supply, and carries out the resonance adjustment processing; a PI type resonant filter circuit module which is respectively connected with the tuning circuit module and a third live wire of the three-phase power supply, and is used for carrying out harmonic filtering processing on the first phase current, the second phase current and the third phase current which are processed by the tuning circuit module; and a rectification circuit module which is connected with the PI type resonant filter circuit module and is used for carrying out rectification processing and supplying power to a load. According to the present invention, the input voltage, current phases, matching impedance and multiple resonance points can be adjusted in real time, the three-phase power supply power factor correction is achieved, THD of harmonic waves of currents of all phases meets the requirement, and the standby power consumption meets the standard; the control is simple, the cost is low, and the reliability is high.

Description

Technical field[0001]The present disclosure relates to the field of motor technology, and more particularly to a harmonic suppression device, method, a control unit, a power supply device, an electrical device, and a storage medium.Background technique[0002]European standard EN 61000-3-2 requires three-phase power supply air conditioning equipment per phase input current ≤16a, forced each phase input current harmonic to meet THD<5% requirements. Conventional design adopts active power factor correction circuit (APFC circuit) to achieve 2 to 40 harmonic requirements. Such asfigure 1 As shown, the circuit is an existing, typical three-phase APFC circuit. The circuit uses an IPM module, a reactor, an AC input voltage, a current sampling conditioning circuit, and a DSP control circuit. The PWM controlled rectification scheme is complex, and the software design is complex. The difficulty is high, and the power factor is high, and this three-phase APFC circuit cost is high, and the rel...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the circuit is an existing and typical three-phase APFC circuit. The circuit uses IPM modules, reactors, AC input voltage, current sampling and conditioning circuits and DSP control circuits to form a PWM controllable rectification scheme. The software design is complex and technical Difficulty, high power factor, and this three-phase APFC circuit has high cost and poor reliability

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