Inverter energy current cycle test device

Abstract

The present invention discloses an inverter energy-stream circulation testing device comprising a DC power supply, a trialed inverter, an inductor, a voltage sensor, a current sensor, a PWM rectifier and a control cabinet, all of which are assembled to realize the testing functions of the inverter. Each cabinet of the device is fixed on the ground, the trialed inverter is fixed on a testing platform, the inductor is arranged on an inductance platform, the main circuit of the PWM rectifier is arranged in an AC cabinet via an iron rack; the AC end of the trialed inverter is connected with one end of the inductor, the DC end of the converter is connected with the output end of a DC power supply; the AC end of the PWM rectifier is connected with the other end of the inductor, the DC end of the PWM rectifier is connected with the output end of an AC power supply; the DC sides of two converters, where one is tested and another is loaded, are connected with each other; the AC end of the DC power supply is connected with the electrical source. The device resolves the problem that converter testing platform is as usual characteristics of huge electric consumption with loading, loud noises and the need for the DC power supply with large power.

Description

technical field [0001] The invention relates to an inverter energy flow cycle test device, which belongs to the field of electric equipment. Background technique [0002] The inverter can convert DC power into AC power with controllable amplitude and frequency through the switching action of power electronic devices. At present, inverters have become an important part of power electronics technology, and their applications have penetrated into various fields of the national economy. In order to overhaul and test the main circuit and control system of the inverter, a test device with equivalent capacity is required. [0003] There are two types of existing test devices, one is that the inverter is externally connected with loads such as reactors and resistance boxes; the other is that the inverter is externally connected with actual loads such as motors. The former has no rotating parts, but the external load is usually constant, and the output power of the inverter cannot ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: use the PWM rectifier as the load of the inverter, rectify the inverted AC power into DC power and send it back to the DC side to form an energy flow cycle test device to solve the power consumption of the previous inverter test bench. Problems such as large power, high noise and difficult power regulation

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