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a current inverter

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

Active Publication Date: 2019-05-14
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

[0045] 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.

[0046] 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 of an inverter based on AC voltage feedforward current control for reducing input disturbance, including simple proportional integral (PI) control and proportional resonance (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.

[0047] The bandwidth frequency of the designed K coefficient controller is 1kHz, and the ph...

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Abstract

An embodiment of the present invention provides a current inverter, including a current controller of the inverter; it is characterized in that the current controller includes a simple proportional-integral control part and a proportional resonance control part. The simple proportional-integral control part and proportional resonance control part designed according to the method of the embodiment of the present invention can well control the output current of the inverter.

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); existing inverters include inverter bridges, control logic, and filter circuits. 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 a con...

Claims

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Application Information

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Patent Type & Authority Patents(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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