Dead-zone compensation method and compensation system for frequency converter

A technology of dead zone compensation and compensation method, which is applied in the direction of converting AC power input into AC power output, output power conversion devices, electrical components, etc., can solve problems such as current zero-crossing distortion, detection deviation, etc., and reduce output voltage distortion. , Inhibit the zero current clamping phenomenon, improve the effect of dead zone compensation accuracy
CN105576993AActive Publication Date: 2016-05-11SHANGHAI GIE EM
2 Cites 14 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
SHANGHAI GIE EM
Publication Date
2016-05-11

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a dead-zone compensation method and compensation system for a frequency converter, and relates to the technical field of motor control. According to the scheme, on the basis of a hardware dead-zone compensation method, software correction is carried out on a hardware pulse width detection error, so that the problem of output voltage distortion under a low-current condition is greatly improved; an output voltage error caused by dead time can be detected at extremely high accuracy; dead-zone compensation can be accurately carried out; the output voltage distortion is greatly reduced; and output current harmonic distortion is suppressed.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of motor control, in particular to a frequency converter dead zone compensation technology. Background technique

[0002] The output terminal of the voltage source inverter generally adopts a bridge circuit with two power semiconductor switches with upper and lower complementary actions for each phase, and the output voltage adopts PWM mode. duty cycle to regulate the output voltage.

[0003] In order to prevent the "bridge arm through" phenomenon between the upper and lower power semiconductors, a period of "dead time" is generally inserted into the drive signal of the bridge arm. During this period, the upper and lower power semiconductors The switching devices are all in a reliable off state.

[0004] The insertion of the dead time leads to the "dead time effect". At the output voltage level, the main manifestations are: output voltage pulse width deviation and pulse edge nonlinearity.

[0005] The upper and low...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More