High-voltage frequency transformer zigzag connected by power device base section

A high-voltage inverter and power device technology, which is applied in the output power conversion device, the conversion of AC power input into AC power output, and the conversion of AC power input into DC power output, etc. Control the problems such as cumbersome, to achieve the effect of simplified structure, excellent performance and simple structure of the whole machine

Inactive Publication Date: 2009-05-27
钟述文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the shortcomings and deficiencies of the above-mentioned prior art, the task of the present invention is to provide a new high-voltage frequency converter in which the basic sections of power devices are interleaved. The problems of complex circuit, material consumption, cumbersome control, high cost and large loss

Method used

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  • High-voltage frequency transformer zigzag connected by power device base section
  • High-voltage frequency transformer zigzag connected by power device base section
  • High-voltage frequency transformer zigzag connected by power device base section

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Embodiment Construction

[0030] see figure 2 The present invention is a high-voltage frequency converter in which the basic sections of power devices are alternately connected. It is mainly composed of a power device insulated gate bipolar transistor (IGBT), a bridge-connected diode clamp circuit, a freewheeling diode and a DC capacitor to form a power device. The basic segment, at its core, is a bridge-connected diode clamp circuit.

[0031] Referring to Figure 3, three or more basic segments of power devices are interleaved in a special way to form the main circuit of the inverter, the core of which is the basic segment of power devices. FIG. 3( a ) shows the staggered connection of the basic segments of 3 power devices, and FIG. 3( b ) shows the staggered connection of the basic segments of 12 power devices.

[0032] The number of segments of the basic segment of the power device is determined according to the required output voltage value of the high-voltage inverter and the power device IGBT can...

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Abstract

This invention relates to a high-voltage frequency exchanger with basic sections of the power device zigzag connecting. The insulation grid bi-pole transistor (IGBT), the bridge joint clamping diode, continuous current diode and the DC condenser compose the basic sections of the power device, the several basic sections zigzag connect to compose the chief return circuit of the frequency exchanger. Use the internal mechanism of the space voltage vectogram optimizes the voltage space vector and its voltage output state, and realize the triphase isochronous modulation of the output voltage of the exchanger and the transformation from the rotating polar to the static flat tri-coordinate during the frequency exchanging period. The exchanger adopts double-pulse side modulation wiring without special rectiformer, so the structure of the entire exchanger is greatly predigested, and the performance is better than the traditional high-voltage frequency exchanger. The instantaneous frequency jumping of the output voltage of the exchanger has only one electrical level, the frequency of the switch the power device is low, the heat lost of the switch-off of the device is small and the reliability is high.

Description

technical field [0001] The invention relates to a high-voltage frequency converter, in particular to a multi-level output high-voltage frequency converter in which the basic sections of power devices are alternately connected. Background technique [0002] At present, high-voltage inverters using Insulation Gate Bipolar Transistor (IGBT) as power devices all use complex H-bridge wiring. low voltage problem. The output voltage of the high-voltage inverter with H-bridge connection is in the range of 3.0kV, 6.0kV, and 10.0kV, and the output power can reach thousands of kW. The high-voltage inverter with H bridge connection is represented by Robinkang line and Fuji line. They all connect multiple single-phase inverters with two-level output or three-level output with neutral point clamping in series end to end to form one phase of the frequency converter. As shown in Figure 1, a three-phase inverter is formed by staggering the phases of the output voltages by 120° electrical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/458H02M7/5387
Inventor 钟述文
Owner 钟述文
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