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Ac/ac conversion power supply device

A power supply device and circuit technology, which is applied in the conversion device of output power, the conversion device that converts AC power input to AC power output, and can be converted to DC without intermediate conversion, etc. and other problems, to achieve the effect of reducing heat generation, reducing inrush current and improving conversion efficiency

Inactive Publication Date: 2011-01-12
NITTA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned power supply device, since a plurality of inverters are connected in series for DC voltage, there is a problem that a voltage equalizing circuit composed of resistors, choke coils, and capacitors is required, resulting in an increase in the number of circuit components.
[0006] In addition, when the power supply unit is applied to an AC / AC conversion power supply unit that processes electric power, the loss due to passing through the voltage equalizing circuit cannot be ignored.

Method used

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Embodiment Construction

[0032] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0033] figure 1 It is a circuit diagram of an AC / AC conversion power supply device for distributing single-phase or three-phase power supply to each household according to one embodiment of the present invention. This AC / AC conversion power supply device has a circuit defined by input terminals T1, T2 and output terminals T3, T4. A high-voltage (for example, 6600V) AC power supply is connected to the input terminals T1 and T2. An AC power supply is generally three-phase, but in this embodiment, only a circuit of one of the three phases is taken out and described.

[0034] To the input terminals T1 , T2 , n (n is an integer; n≧2) rectifier circuits D1 to Dn are connected in series through a fuse F. As shown in FIG. The voltage of the AC power supply is divided into n equal parts by these rectifier circuits D1 to Dn, and each divided voltage is converted into...

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PUM

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Abstract

Provided is an AC / AC conversion power supply device including: n (n = 2) rectification circuits (D1 to Dn) connected in series with respect to an AC input; n high-frequency switching circuits (SC1 to SCn) respectively connected to outputs of the rectification circuits (D1 to Dn); and n transformers (TR1 to TRn) each having a primary winding connected to the outputs of high-frequency switching circuits (SC1 to SCn). The transformers (TR1 to TRn) have secondary windings connected in parallel to one another and an output switching circuit (SW) for converting the outputs of the secondary windings of the respective transformers into AC current. The high-frequency switching circuits (SC1 to SCn) include delay circuits (C14, R14; C24, R24) which can delay a waveform of the high-frequency switching signal.

Description

technical field [0001] The present invention relates to an AC / AC conversion power supply device (also referred to as an electronic transformer) for obtaining an AC output after voltage conversion of an AC input. Background technique [0002] Conventionally known Patent Document 1 discloses a power supply device that rectifies a commercial AC power supply to obtain a DC voltage, connects a plurality of inverters in series to the DC voltage, and pairs the voltages obtained from the inverters through transformers. The high-frequency voltage is isolated / boosted and stepped, and the output voltage Vout of the secondary side of each transformer is connected in parallel, and rectified / smoothed by a rectifier circuit to obtain a DC voltage. [0003] In this power supply device, after the commercial AC power is rectified into DC, it is equally divided by a voltage equalizing circuit, and each divided voltage is input to the inverter. [0004] Patent Document 1: US Patent No. 4062057...

Claims

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Application Information

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IPC IPC(8): H02M5/458H02M5/22H02M7/48
Inventor 王国华
Owner NITTA CORP
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