Three-level high-voltage and large-power water-cooling frequency converter system

A frequency converter and high-power technology, applied in the field of electrical control structural components, to achieve the effects of installation and maintenance, suppression of bus overvoltage, and reasonable design

Pending Publication Date: 2018-04-13
CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the technical problems existing in the prior art, and provides a three-level expandable bridge-arm parallel connection high-voltage high-power water-cooled inverter. Reduce the circulation of the system and suppress the problems such as busbar overvoltage, and the inverter achieves a 2-3 times increase in output power on the basis of the existing structural volume

Method used

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  • Three-level high-voltage and large-power water-cooling frequency converter system
  • Three-level high-voltage and large-power water-cooling frequency converter system
  • Three-level high-voltage and large-power water-cooling frequency converter system

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Embodiment 1

[0027] Embodiment 1: see figure 1 , a three-level high-voltage high-power water-cooled inverter system, including: a full-digital control cabinet 2, an inverter cabinet 3 based on a double-arm power unit, and a water circulation cooling system cabinet 4; the full-digital control cabinet 2, based on a dual The inverter cabinet 3 of the bridge arm power unit and the water circulation cooling system cabinet 4 are assembled and combined from left to right to form a complete set of high-voltage and high-power water-cooled inverter system. The entire inverter system adopts a double bridge arm parallel structure. The overall structure scheme It can be more flexibly adapted to applications requiring various output powers. According to actual needs, an excitation winding cabinet 1 can also be added. The excitation winding cabinet 1 is arranged on one side of the all-digital regulating cabinet 2 . In terms of space volume utilization, the design is more reasonable and compact, enabling ...

Embodiment 2

[0028] Example 2: see figure 1 , as an improvement of the present invention, the full digital control cabinet 2 includes a core control module, an auxiliary power supply system, a man-machine dialogue system and a cabinet, and the core control module adopts a vector controller with a DSP+FPGA structure , with a 32-bit digital model processor as the core; realize speed closed-loop control, unit power factor control, frequency conversion vector control, current closed-loop control, fault diagnosis and other functions. Installed at the front of the full digital control cabinet; the auxiliary power supply system is used to provide stable operating power for the auxiliary control of the entire system, and is installed at the rear of the cabinet; the man-machine dialogue system adopts a touch screen man-machine dialogue operation interface, installed In the middle of the front of the cabinet.

Embodiment 3

[0029] Embodiment 3: see figure 1 , image 3 , the inverter cabinet 3 based on the double-bridge arm power unit includes a cabinet body 305 and three sets of double-bridge arm power unit modules 301, discharge modules 302, sensor modules 303, and spare expansion support capacitors installed in the cabinet Module 304, the double-arm power unit module 301 is installed in the front of the cabinet; the discharge module 302 is fixed on the left side of the upper part of the cabinet by bolts, and the sensor module 303 is fixed on the upper part of the cabinet by bolts On the right side, the spare extended support capacitor module 204 is arranged above the dual-arm power unit module 301 . The inverter based on the double-bridge arm power unit adopts AFE active front-end technology, and the advanced back-to-back three-level AC-DC-AC frequency conversion method ensures stable four-quadrant operation on the power side of the inverter. Among them, the power unit module adopts the doubl...

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Abstract

The present invention relates to a three-level high-voltage high-power water-cooled frequency converter system, including: a full digital regulation cabinet, a frequency converter cabinet based on a double bridge arm power unit, and a water circulation cooling system cabinet, and the components are assembled and combined from left to right A complete set of high-voltage and high-power water-cooled inverter system is formed, among which: the excitation winding cabinet adopts three-phase 6-pulse rectification to realize the adjustment function of the excitation current of the rotor book of the synchronous motor; the all-digital adjustment cabinet adopts a DSP+FPGA structure vector controller , with a 32-bit digital model processor as the core; the bridge-arm parallel inverter cabinet adopts the topological structure of unit modules and bridge arms in parallel, which can be connected in parallel with the left and right bridge arms inside the double-bridge arm power unit module, and the double-bridge arm power unit The power of the inverter can be expanded by means of parallel connection of modules or parallel connection of inverter cabinets based on double bridge arm power units. The invention can effectively realize rapid installation and maintenance, and realize twice or even greater output power of the complete frequency converter on the basis of the volume of the prior art.

Description

technical field [0001] The invention relates to a frequency converter, in particular to a three-level expandable bridge arm parallel connection high-voltage and high-power water-cooled frequency converter, which belongs to the technical field of electrical control structural components. Background technique [0002] At present, the high-power inverter application technology (CN201420283871.4 invention patent) is relatively mature, and most of them can realize the corresponding modular design. In order to improve the heat dissipation efficiency of power components, increasingly perfect water cooling heat dissipation methods are gradually being adopted, which greatly The output power of the whole machine has been greatly improved, but when the output power is increased to a certain level, the overall structural volume of the inverter seriously exceeds the requirements of the field use environment: the heat dissipation water-cooled version of the prior art adopts the traditional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02M7/00H05K7/20
CPCH02M1/00H02M7/003H05K7/20909H05K7/20927
Inventor 谭国俊王浩杨波秦振封安波李辉
Owner CHAJNA MAJNING DRAJVS EHND AUTOMEHJSHN KO
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