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Power Unit Control Circuit of High Voltage Frequency Converter

A high-voltage inverter, power unit technology, applied in the output power conversion device, AC power input is converted into AC power output, electrical components and other directions, to achieve the effect of improving operating stability and improving performance

Inactive Publication Date: 2017-06-16
上海亿思特电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to transmit the DC bus voltage of the power unit, radiator temperature and other signals to the main controller through optical fiber, there are indeed many difficulties

Method used

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  • Power Unit Control Circuit of High Voltage Frequency Converter
  • Power Unit Control Circuit of High Voltage Frequency Converter
  • Power Unit Control Circuit of High Voltage Frequency Converter

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Embodiment Construction

[0063] The power unit control circuit of the high-voltage frequency converter of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments of the present invention.

[0064] figure 2 It is a schematic diagram of the principle of the power unit control circuit of the high-voltage frequency converter of the present invention. figure 2 In the power unit control circuit of the high-voltage frequency converter shown, the fuse 21, the rectifier circuit 22, the DC filter circuit 23, the inverter circuit 24 and the unit bypass circuit 25 constitute the main circuit of the power unit, and the power unit control circuit 26 is the circuit to be further explained in the present invention.

[0065] exist figure 2 Among them, the power unit control circuit 26 mainly includes an optical fiber interface circuit 261, a logic control circuit 262, a power switch drive circuit 263 and a DC voltage detection circuit 264; wher...

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Abstract

The invention discloses a power unit control circuit of a high-voltage frequency converter, which mainly includes a power supply circuit, an optical fiber interface circuit, a control logic circuit, a power switch drive circuit and a DC voltage detection circuit; The controller is connected and connected to the control logic circuit; the power switch drive circuit is respectively connected to the control logic circuit and the power switch in the power unit; the input side of the DC voltage detection circuit is connected to both ends of the DC bus of the power unit, and the output side is connected to the control logic circuit; The voltage detection circuit converts the DC bus voltage signal into a digital signal and sends it to the control logic circuit for encoding, and then the optical fiber interface circuit sends it to the main controller of the high-voltage frequency converter through the optical fiber. By adopting the power unit control circuit of the present invention, the monitoring function of the power unit can be improved, and the operation stability of the high-voltage frequency converter can be improved.

Description

technical field [0001] The invention relates to power electronics and control technology, in particular to a power unit control circuit of a high-voltage frequency converter. Background technique [0002] In the field of high-voltage inverters, since Peter W. Hammond proposed the unit-series high-voltage inverter in 1995, this method of using low-voltage power conversion technology to realize high-voltage power conversion is due to its good output voltage waveform, low input harmonic current, and low cost. Low cost and easy maintenance have become the mainstream technology of high-voltage inverters, and many manufacturers at home and abroad have launched products based on this technology. Due to the remarkable effects in energy saving, consumption reduction, improvement of production processability, and improvement of equipment working life, the application is becoming more and more common. [0003] figure 1 It is a schematic diagram of the main circuit of the existing pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/458
Inventor 李永盼
Owner 上海亿思特电气股份有限公司
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