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Current inverter

A technology of current inverter and inverter, which is applied in the direction of electrical components, irreversible DC power input into AC power output, and output power conversion device, etc., which can solve the problems of poor working efficiency of inverters, etc. achieve good control

Active Publication Date: 2017-05-31
BEIJING XJ ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the problem of poor working efficiency of inverters in the prior art, the purpose of the embodiments of the present invention is to provide an effective and efficient current inverter

Method used

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Embodiment Construction

[0049] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0050] The embodiment of the present invention proposes a current controller of an inverter; figure 1 This inverter with an L-type filter is shown. The embodiment of the present invention proposes a current controller for an inverter based on AC voltage feed-forward current control for reducing input disturbance, including simple proportional-integral (PI) control and proportional harmonic (PR) control. The current control principle of the embodiment of the present invention is as follows figure 2 As shown, its PI control is static, expressed in terms of exchange volume, and there is a small static error in the magnitude and phase angle of the exchange volume.

[0051] The bandwidth frequency of the designed K coefficient controller is 1kHz, and the p...

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Abstract

The embodiment of the invention provides a current inverter. The current inverter comprises a current controller of the inverter. The current inverter is characterized in that the current controller comprises a simple proportional integral control part and a proportional harmonic control part. According to the simple proportional integral control part and the proportional harmonic control part designed by the method in the embodiment of the invention, the output current of the inverter can be well controlled.

Description

technical field [0001] The invention belongs to the field of electronic technology, in particular to a current inverter. Background technique [0002] The inverter converts DC power (battery, storage battery) into AC power (generally 220V, 50Hz sine wave); the existing inverter includes an inverter bridge, control logic, and filter circuit. Inverters are widely used in various electrical appliances, and are widely used in various vehicle-mounted devices powered by vehicle batteries. The existing inverter circuit such as figure 1 As shown, it includes four insulated gate bipolar transistors IGBTD1, IGBTD2, IGBTD3, and IGBTD4, wherein the four insulated gate bipolar transistors are connected in parallel with the DC power supply V_dc after two pairs of the insulated gate bipolar transistors connected in series, and one of the insulated gate bipolar transistors connected in series Connect the inductor between to form the AC output va. [0003] The existing inverters all need ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/42
CPCH02M7/42H02M1/0003
Inventor 刘鹏吕志来喻宜张东李海
Owner BEIJING XJ ELECTRIC
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