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Multiple chopper input control circuit

A technology for controlling circuits and choppers, applied in the field of electricity, can solve the problems of high noise in reactors, achieve high frequency, reduce volume, and solve the effects of heat generation

Inactive Publication Date: 2014-12-24
SHANGHAI RO INTELLIGENT SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a multiple chopper input control circuit. The multiple chopper input control circuit should solve the problem of the reactor when the chopper works at the frequency of 2KHz~12KHz in the prior art. Noisy Technical Issues

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Embodiment 1

[0015] like figure 1 and figure 2 As shown, the multiple chopper input control circuit of the present invention includes a DC positive input terminal 10, a DC negative input terminal 20, a DC positive output terminal 30, a DC negative output terminal 40, a digital signal processor 100 and a field programmable Programmable gate array pulse distributor 200, wherein the DC negative input terminal 20 is directly connected to the DC negative output terminal 40, a first capacitor C1 is connected between the DC positive input terminal 10 and the DC negative input terminal 20, and the DC positive output terminal 30 A second capacitor C2 is connected to the DC negative output terminal 40, a first current sensor SC1, an inductor L1 and a second current sensor SC2 are arranged between the DC positive input terminal 10 and the DC positive output terminal 30, The input terminal of the first current sensor SC1 is connected to the DC positive input terminal 10, the output terminal of the f...

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Abstract

Provided is a multiple chopper input control circuit. Multiple PWM control is achieved through a digital signal processor and a field-programmable gate array pulse distributor, switching processes of more than two IGBT modules are superposed on a reactor in a chopper, there's no need to increase the working frequency of each IGBT while the working frequency of the reactor is increased greatly, high frequency of the reactor of a high-voltage and high-power BUKE chopper is achieved, noise of a device is low while IGBTs can work in a low-frequency state, and the problem of heat generation caused when existing high-voltage IGBTs operate at high frequency is well solved. Pulse distribution is achieved by means of a field-programmable gate array element, configuration is flexible, upgrade is simple, and the working frequency of the reactor can be increased to the MHz grade. In addition, by means of high working frequency of the reactor, the size of the chopping reactor can be reduced, and ripples of output current are reduced.

Description

Technical field: [0001] The invention relates to the field of electricity, in particular to a technology for converting a direct current signal into an alternating current signal, in particular to a multiple chopper input control circuit. Background technique: [0002] BUKE chopper (hereinafter referred to as chopper) is widely used because of its simple circuit structure, low cost and high system efficiency. However, under high-power and high-voltage working conditions, high-voltage (above 1700V) and high-current IGBT modules are often required, and high-voltage and high-power IGBTs cannot achieve high switching frequencies. The switching frequency recommended by IGBT manufacturers is 2KHz about. Experiments show that under the working conditions of high switching frequency (greater than 16KHz), Infineon's FF1400R17IP4 is used as the switching tube, when the input voltage is 1150VDC, the output voltage is 750VDC, the output current is 100A, and the radiator temperature is ...

Claims

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Application Information

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IPC IPC(8): H02M7/48H02M1/44
Inventor 龙民敬王勋
Owner SHANGHAI RO INTELLIGENT SYST