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Inverter control device

A technology for controlling equipment and inverters, applied in control systems, vector control systems, AC motor control, etc., can solve the problems of multiple storage capacity and long time, achieve the effect of simplifying configuration and ensuring control stability

Inactive Publication Date: 2019-08-13
LSIS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, since tabular or trigonometric functions must be used for overmodulation, the inverter controller must use excessive memory capacity
Overmodulation takes too long

Method used

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Examples

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Embodiment Construction

[0023] Examples of various implementations are further illustrated and described below. It is to be understood that the description herein is not intended to limit the claims to the particular embodiments described. On the contrary, it is intended to cover alternatives, modifications and equivalents as may be included within the spirit and scope of the present disclosure as defined by the appended claims.

[0024] The same reference numbers in different figures identify the same or similar elements and thus perform similar functions. Additionally, descriptions and details of well-known steps and elements are omitted for simplicity of the description. In addition, in the following detailed description of the present disclosure, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, it is understood that the present disclosure may be practiced without these specific details. In other instances, well-known metho...

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Abstract

An inverter control device is disclosed. The device is configured: for determining a fundamental-wave magnitude of a phase-voltage corresponding to a modified voltage; for performing a proportional-integral (PI) operation of an error between the fundamental-wave magnitude of the phase-voltage and a magnitude of a reference voltage, and for outputting a compensation voltage; configured for adding the compensation voltage to the magnitude of the reference voltage to obtain an output; and for over-modulating the output and for outputting the over-modulated output as the modified voltage.

Description

technical field [0001] The present disclosure relates to inverter control devices. Background technique [0002] Generally, an inverter is a device that converts DC power to AC. An inverter used in industry receives power supplied from a commercial power source and changes the voltage and frequency of the power to provide variable voltage and frequency to a motor, thereby efficiently controlling the speed of the motor. [0003] Inverters are widely used in systems requiring variable speed operation. Various configurations are realized in various application fields based on power semiconductors. The number of levels or magnitude of the output voltage and the voltage synthesis method may vary based on the configuration. Realize various inverter configurations according to user requirements. [0004] In industrial inverters, three-phase half-bridge inverters are usually used. A three-phase half-bridge inverter has a structure in which three single-phase half-bridge inverte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387
CPCH02M7/5387H02M7/53875H02P21/14H02P21/22H02M1/0025H02M7/53876H02M1/12H02M7/219H02P27/06H02M1/0003H02M1/0064H02M7/48H02P21/0003H02P27/08
Inventor 崔乘喆李学俊
Owner LSIS CO LTD
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