AC/AC converter

A converter, converter technology, applied in the field of power
CN102364862AInactive Publication Date: 2012-02-29UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2012-02-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an AC / AC converter. A corresponding principle comprises: acquiring alternating current power Uin (AC) from power grid (L, N, grounding); sending to a high-frequency transformer T-2 after passing through an EMI filter which is formed by differential mode capacitors C1, C2, a common mode choke T-1 and common mode capacitors C3, C4; performing by turns high frequency conduction to primary switches S1, S2of the high-frequency transformer T-2. Then, a power frequency voltage added on primary windings N3, N4 of the high-frequency transformer T-2 is converted into a high frequency voltage so that secondary windings N5, N6 of the high-frequency transformer T-2 can get the corresponding high frequency voltage. Through correspondingly controlling the switches S3, S4 of the secondary windings, any alternating current voltage Uo (AC) which is common-frequency, same-phase or anti-phase with an input voltage can be acquired on an output terminal. Through carrying out filtering by using a low pass filter which is formed by a L1 and a C5, a distortion factor of the Uo (AC) can be reduced.
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Description

[0001] technical field

[0002] The invention discloses an AC / AC converter and belongs to the technical field of power supplies. The converter can be widely used in various electronic devices. Background technique

[0003] With the increasing shortage of major energy sources such as oil, coal and natural gas, the requirements for the utilization rate of energy are getting higher and higher, especially for the utilization rate of electric energy and its power supply accuracy. However, due to the contradiction between power supply and demand, the mains grid voltage fluctuates greatly, which cannot meet the requirements of high-precision loads. It is necessary to add a high-precision wide-voltage regulated AC / AC converter between the mains grid and the load. device.

[0004] Generally speaking, if we want to obtain an AC voltage, we usually obtain it through the following methods: one is to obtain it after directly stepping down the traditional power frequency transformer; th...

Claims

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