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Large capacity multiple dc-dc power supply

A DC-DC, multiple technology, applied in the direction of electrical components, circuit devices, adjusting electrical variables, etc., can solve the problems of difficult production, unsatisfactory reliability, large harmonics, etc., to increase the equivalent switching frequency and improve the overall Effects of reliability, volume and weight reduction

Inactive Publication Date: 2011-12-21
保定市红日电气有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

Large-capacity power supply is an important equipment necessary for polysilicon production. At present, polysilicon production generally uses polysilicon AC power supply or thyristor rectifier power supply. Medium and high power voltage regulators are complex in structure and difficult to manufacture
These two power supplies have no backup unit, the reliability is not ideal, and the efficiency is low, and the harmonics are large
The above shortcomings can be overcome by using DC-DC chopper converters, but due to the small current allowed by a single power electronic device, the power of existing DC-DC chopper converters is far from meeting the requirements of polysilicon production

Method used

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Embodiment Construction

[0019] see figure 2 , Multiple DC-DC chopper converters of the present invention are composed of three parts: IGBT, drive circuit and protection circuit. All IGBTs are connected between the power supply and the load.

[0020] DC-DC basic chopper converter working principle

[0021] The conversion principle of the DC-DC basic chopper converter is to change the direct current into another fixed voltage or adjustable direct current, and change the output DC voltage by changing the switching frequency and duty cycle of the power device. If the power device conduction time is , the off-time is , then under the condition of constant input voltage E, the control , The relative length of the output can control the average voltage U o The size, to achieve lossless DC voltage regulation. DC-DC basic chopper converters are generally step-down converters.

[0022] multiple chopping circuit

[0023] In the present invention, a plurality of DC-DC basic chopper converters with ...

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Abstract

A large-capacity multiple DC-DC power supply belongs to the technical field of power supplies. Its technical solution is that it is composed of multiple DC-DC chopper converters with the same structure, intelligent controller and LC low-pass filter, and each DC-DC chopper converter is composed of IGBT and its driving circuit. The drains of the IGBTs in a DC-DC chopper converter are connected together and then connected to the input voltage, the sources are connected together and then connected to the load through an LC low-pass filter, and the gate of each IGBT is controlled by its drive circuit and intelligent control The device is connected, and a freewheeling diode is provided between the LC low-pass filter and the IGBT. This device can not only meet the power requirements of polysilicon production, hydrogen production, electrolysis, electroplating and other fields, but also has the advantages of simple structure, small size, convenient manufacture, good voltage and current stabilization effect, high reliability, and no environmental pollution. .

Description

technical field [0001] The invention relates to a high-power DC power supply suitable for the fields of polysilicon production, hydrogen production, electrolysis and electroplating, and belongs to the field of power supply technology. Background technique [0002] In recent years, with the inclination of new energy policies, the demand for solar-grade polysilicon is increasing. Large-capacity power supply is an important equipment necessary for polysilicon production. At present, polysilicon production generally uses polysilicon AC power supply or thyristor rectifier power supply. Medium and high power voltage regulators are complex in structure and difficult to manufacture. These two power supplies have no backup unit, the reliability is not ideal, and the efficiency is low and the harmonics are large. Using a DC-DC chopper converter can overcome the above shortcomings, but because the current allowed by a single power electronic device is small, the power of the existing...

Claims

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Application Information

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IPC IPC(8): H02M3/155H02H7/10H02H3/08H02H5/04
Inventor 范好亮范建波王锐刘会军
Owner 保定市红日电气有限公司
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