Unlock instant, AI-driven research and patent intelligence for your innovation.

Control device for matrix converter and output voltage generating method thereof

A matrix converter and control device technology, applied in the direction of converting AC power input into AC power output, AC power input into DC power output, output power conversion device, etc., can solve the problem of resonance, cost increase, and poor peripheral equipment. impact, etc.

Inactive Publication Date: 2014-12-10
YASKAWA DENKI KK
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the conventional matrix converter, which is a power converter that does not convert AC to DC but performs direct conversion, there is the following problem. The input filter provided to prevent the fluctuation of the input current caused by the carrier frequency used in PWM control from flowing out If there is a resonant frequency in the converter, when the thyristor converter is connected to the same power system or the input voltage is distorted, the resonance phenomenon will occur, which will have a bad effect on the peripheral equipment, or due to the improvement of the resistance of the input filter and buffer circuit connected to the main circuit part. pressure on such measures to increase the cost
In addition, in the conventional matrix converter device, no method of correcting the variation caused by the input side is disclosed

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control device for matrix converter and output voltage generating method thereof
  • Control device for matrix converter and output voltage generating method thereof
  • Control device for matrix converter and output voltage generating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A first embodiment of the present invention will be described with reference to the drawings.

[0046] figure 1 It is a block diagram of a control device for a matrix converter embodying the present invention. In the figure, 1 is a matrix converter, and a three-phase power supply is supplied from a three-phase power supply 40 via a reactor 3, and a load 7 is connected to the output side. The gate signal of the generator 11 is driven, and power conversion is performed in both directions. 5 is an input filter, which is composed of a reactor 3 and a capacitor 4, and is provided between the three-phase power supply 40 and the input side of the matrix converter 1. In addition, the reactor 3 is constituted by an internal reactance of the three-phase power supply 40 or a reactor provided on wiring between the three-phase power supply 40 and the matrix converter 1 . 6 is a snubber circuit which absorbs a surge voltage generated by the switching operation of the main circuit...

Embodiment 2

[0079] Next, a second embodiment of the present invention will be described with reference to the drawings.

[0080] image 3 is a block diagram showing the configuration of the second embodiment, and the symbols and symbols in the figure are omitted. figure 1 For the description of the same structure, different parts are described below. The first embodiment is characterized by having an input voltage command calculation unit 12 and a capacitor voltage detector 13, but the second embodiment is different from the first embodiment in that instead of directly detecting the capacitor terminal voltage V c , to detect the capacitor current vector I c , according to the I c Find the capacitor voltage vector V c .

[0081] The capacitor current detector 14 detects the capacitor current I c , using the I c Calculate the capacitor voltage vector V by formula (8) c .

[0082] V c =(1 / C)∫I c dt···(8)

[0083] In this way, due to the operation of the capacitor voltage vector ...

Embodiment 3

[0085] Next, a third embodiment of the present invention will be described with reference to the drawings.

[0086] Figure 4 is a block diagram showing the configuration of the third embodiment, and the symbols and symbols in the figure are omitted. figure 1 For the description of the same structure, different parts are described below. The first embodiment is characterized by having an input voltage command calculation unit 12 and a capacitor voltage detector 13, but the third embodiment differs from the first embodiment in that instead of directly detecting the capacitor terminal voltage V c , detect the input current Iin flowing to the matrix converter 1, and calculate the capacitor voltage vector V according to the Iin c .

[0087] The input current detector 15 detects the input current Iin flowing to the matrix converter 1, and uses this Iin by considering the output current I out Equation (9) of the current vector IL distributed to the input side calculates the cap...

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

PUM

No PUM Login to View More

Abstract

A control device for a matrix converter includes an input voltage detector, an output current detector, a pulse width modulator, and an input voltage command calculator. The input voltage detector is configured to detect an input voltage of the matrix converter. The output current detector is configured to detect an output current of the matrix converter. The pulse width modulator is configured to generate a PWM pulse command signal by using the input voltage, the output current, and an output line voltage command. The input voltage command calculator is configured to calculate an input voltage command of the matrix converter.

Description

technical field [0001] The present invention relates to a control device and an output voltage generating method of a power converter which does not convert AC to DC but directly converts it. Background technique [0002] As an existing power converter that does not convert AC to DC but performs direct conversion, there is a matrix converter, and its control device usually generates an output line-to-line voltage command V in the shape of a PWM pulse. ref , the size of the output line-to-line voltage is controlled by the area of ​​the PWM pulse, and the input current is close to a sine wave through the ratio of the PWM pulse described later. [0003] Figure 8 The output line-to-line voltage of the matrix converter is expressed in the form of a PWM pulse. exist Figure 8 Among them, 111 is the pulse of the part determined by the potential difference between the minimum potential phase and the intermediate potential phase, 112 is the pulse of the part determined by the poten...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/27H02M5/293H02M5/297
CPCH02M7/53871H02M5/297H02M2001/0022H02M1/0022
Inventor 上田洋三末永龍二渡邊英司
Owner YASKAWA DENKI KK