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High-voltage adjustable direct-current source

A DC source, high-voltage technology, applied in the direction of irreversible AC power input conversion to DC power output, AC power input conversion to DC power output, output power conversion device, etc., can solve the problem of adjustable DC source limited power device resistance Voltage level, unable to meet high-voltage power demand, unable to achieve high-voltage output, etc., to achieve the effect of adjustable output voltage and stable operation

Pending Publication Date: 2020-05-19
ZHUZHOU FULLDE RAIL TRANSIT RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing adjustable DC source is limited by the withstand voltage level of the power device, and its output voltage is only in the range of 0-120V, which cannot realize high-voltage output and cannot meet the high-voltage power demand in special scenarios

Method used

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  • High-voltage adjustable direct-current source

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Embodiment Construction

[0030] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0031] See figure 1 , the adjustable DC source in this embodiment can realize 10kW, 100V-4500V adjustable output, its front stage is AC380 / 690V transformer T1, power 12kW, transformer T1 takes power from AC380V three-phase alternating current, and its secondary side is connected in series with common mode Inductor L1 performs input side filtering.

[0032] The rear stage of the transformer T1 is a three-phase rectifier bridge comp...

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Abstract

The invention relates to a high-voltage adjustable direct-current source which is used for outputting an adjustable high-voltage level. A structure of the direct current source is characterized in that a transformer T1 takes power from a three-phase alternating current and supplies power to a three-phase rectifying and filtering circuit, and the three-phase rectifying and filtering circuit outputsa direct current to a positive bus BUS+ and a negative bus BUS-; the positive bus BUS+ is sequentially connected with a first power tube group, an inductor L2 and a diode group in series and then isconnected to an output end VOUT+, wherein a conduction direction of each diode in the diode group points to the output end VOUT+; the negative bus BUS- is connected with the output end VOUT-, an anodeof a fly-wheel diode D1 is connected with the negative bus BUS-, and a cathode of the fly-wheel diode D1 is connected to a contact between the first power tube group and the inductor L2; a contact between the inductor L2 and the diode group is connected to the negative bus BUS- through the second power tube group; an energy storage capacitor bank is bridged between the output end VOUT+ and the output end VOUT-; and a PWM generating device is electrically connected with G poles of power tubes respectively.

Description

technical field [0001] The invention relates to the field of direct current power supplies, in particular to a high-voltage adjustable direct current source. Background technique [0002] The existing adjustable DC source is limited by the withstand voltage level of the power device, and its output voltage is only in the range of 0-120V, which cannot realize high-voltage output and cannot meet the high-voltage power demand in special scenarios. Contents of the invention [0003] In order to improve the deficiencies of the prior art, the present invention provides a direct current source for outputting adjustable high voltage levels. [0004] To achieve the above object, the present invention is achieved through the following technical solutions: [0005] Provide a high-voltage adjustable DC source, including transformer T1, three-phase rectification filter circuit, positive bus BUS+, negative bus BUS-, freewheeling diode D1, inductor L2, energy storage capacitor group, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/217H02M7/25H02M7/219H02M7/04H02M7/10
CPCH02M7/04H02M7/10H02M7/2173H02M7/219H02M7/25
Inventor 罗万里何涛杜浩王正云
Owner ZHUZHOU FULLDE RAIL TRANSIT RES INST CO LTD
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