Three-phase rectification converter and control method thereof

A technology of three-phase rectification and converter, which is applied in the direction of DC power input conversion to DC power output, AC power input conversion to DC power output, control/regulation system, etc., which can solve the problem of underutilization of the current conduction capacity of step-down switching devices , There are many devices in the diversion path, and it is not suitable for application, etc., to achieve the effect of reduced limitation, simple circuit, and reduced control difficulty

Pending Publication Date: 2021-10-15
深圳市高益智能电气有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a three-phase rectifier converter and its control method to solve the disadvantages of the above-mentioned prior art, which are caused by too many diversion path devices and insufficient use of the diversion capacity of the step-down switching device. Technical issues for applications in high places

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  • Three-phase rectification converter and control method thereof
  • Three-phase rectification converter and control method thereof

Examples

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Embodiment 1

[0037] Such as image 3 As shown, this embodiment proposes a non-isolated three-phase rectifier converter, including an input rectifier bridge group, a step-down switch unit and an energy storage freewheeling unit; the input terminal of the input rectifier bridge group is connected to an external three-phase The output end of the three-wire power supply or the three-phase three-wire power supply with a filter is connected, the output end of the input rectifier bridge group is connected to the input end of the step-down switch unit, and the output end of the step-down switch unit is connected to the input end of the step-down switch unit. Energy storage freewheeling unit connection. The input rectifier bridge group includes first to third rectifier bridges FB1 to FB3, and the first to third rectifier bridges FB1 to FB3 are diode full-bridge rectifier bridges, which are internally composed of four diodes (for the convenience of subsequent discussion, the first The diodes in the...

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Abstract

The invention discloses a three-phase rectifier converter and a control method thereof. The three-phase rectifier converter comprises an input rectifier bridge group, a step-down switch unit and an energy storage follow current unit, the input end of the input rectifier bridge group is connected with an external three-phase three-wire power supply, the input end of the step-down switch unit is connected with the output end of the rectifier bridge group, and the output end of the step-down switch unit is connected with the energy storage follow current unit. Meanwhile, the rectifier is provided with two switch unit rectification loops, and the two switch units can work in an in-phase parallel connection mode or in a staggered-phase parallel connection mode. The three-phase rectification converter is simple in structure and simple in control method, the rectifier bridge and the switch tube in the converter can be reused to the maximum extent, and the three-phase rectification converter has very obvious advantages in occasions with medium and high power and requiring high efficiency and high power density.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a three-phase rectifying converter and a control method thereof. Background technique [0002] As the current power of electrical equipment is increasing, more and more electrical equipment adopts the three-phase power supply mode. If the electrical equipment does not have the power factor correction (PFC) function, it will greatly damage the power quality of the power grid, seriously Sometimes even lead to the paralysis of the grid. In order to meet the quality requirements of the power grid, reduce harmonic pollution to the power grid or cause unnecessary transmission burden on the distribution network, the three-phase electrical equipment must have the PFC function or add a filter device to meet the requirements of relevant regulations. [0003] Generally speaking, for a three-phase AC input rectifier conversion circuit, if the PFC (power factor correction) function is requir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/08H02M7/217H02M3/158
CPCH02M7/08H02M7/2173H02M3/1584
Inventor 李伦全李玲陈乾宏
Owner 深圳市高益智能电气有限公司
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