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Novel AC-AC power conversion topology principle structure and control method thereof

An AC-AC, power conversion technology, applied in the field of AC-AC power conversion topology principle structure, can solve the problems of a large number of series power devices, large losses, complex power conversion topology structure, etc., to reduce the technical requirements of heat dissipation, power conversion High efficiency and the effect of reducing the number of devices in the conversion path

Inactive Publication Date: 2015-06-10
QINGDAO JINGRUI MEASUREMENT & CONTROL TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, due to traditional power conversion topologies such as Figure 10 ) mainly adopts the principle structure of AC / DC+DC / AC, that is, the rectification conversion from AC to DC is performed first, and then the inverse conversion output from DC to AC is performed. It needs two conversions to obtain the required power supply characteristics. The power conversion topology is complex and the number of power devices in series is large, so the loss is still relatively large

Method used

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  • Novel AC-AC power conversion topology principle structure and control method thereof
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  • Novel AC-AC power conversion topology principle structure and control method thereof

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Embodiment Construction

[0021] Such as figure 1 As shown, the present invention is a novel high-efficiency AC-AC power conversion topology principle structure and control method, and its topology structure consists of double secondary (n 21 , n 22 ) Transformer Q F , positive output power conversion modulation switch (T 1 、D 2 and T 3 、D 4 ), negative output power conversion modulation switch (T 2 、D 1 and T 4 、D 3 ), forward freewheeling switch (T 5 、D 6 ), negative freewheeling switch (T 6 、D 5 ), and the power filter (L 1 , L 2 、C 2 ) and the main control unit. The opposite ends of the two secondary coils are respectively connected to T 1 、D 1 and T 3 、D 3 , the other two heteronyms are connected to T 2 、D 2 and T 4 、D 4 The outputs of the two forward modulating switches and the outputs of the two negative modulating switches are respectively connected in parallel and used as an output to connect the filter, and then output to the load; the two freewheeling switches are co...

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Abstract

The invention discloses a novel high-efficiency AC-AC power conversion topology principle structure and a control method thereof. The novel AC-AC power conversion topology principle structure consists of parallel output of two semiconductor power switches which are complementary in phase, and each semiconductor power switch can be modulated in a two-way semi-wave mode, and stable direct-current, alternating-current or pulse coding power current or voltage is output through electric filtering, closed loop control algorithm with corresponding characteristics and driving. The AC-AC power conversion topology structure reduces quantity of series-connected power consumption apparatuses, greatly improves power conversion efficiency and reduces power consumption, so that radiating requirements are lowered, the volume of the equipment is reduced, and thus, the novel high-efficiency AC-AC power conversion topology principle structure is especially suitable for a low-voltage large-current application occasion with limited space and radiation conditions. AC-AC direct power conversion further increases the utilization rate of the transformer, and the interferences to the power grid are greatly lowered. The topology structure disclosed by the invention is simple, good in controllability, high in efficiency and capable of providing powerful technical support to low-voltage large-current application.

Description

technical field [0001] The invention designs a novel, simple and efficient AC-AC power conversion topology principle structure, and provides a control method. Through the control algorithm and high-speed logic drive control, any pulse-coded high-current output from DC to AC, and zero-return or non-return-to-zero can be realized. Its high efficiency is the main technical feature of this topology. The invention is mainly used in application fields such as low-voltage high-current power supply, controllable source electromagnetic transmitter, aviation electromagnetic exploration and high-power electric welding machine, and is especially suitable for application occasions with low resistance and heavy load. Background technique [0002] Since the emergence of power electronics technology, various power conversion topology structures and corresponding control algorithms have been widely used to obtain the required excellent characteristics of power supply technology. High effici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/22
Inventor 王建国
Owner QINGDAO JINGRUI MEASUREMENT & CONTROL TECH
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