Modularized middle-high voltage alternating current power supply
An AC power supply, medium and high voltage technology, applied in the field of modular medium and high voltage AC power supply, can solve the problems of large transformer loss, difficult design, high heat dissipation requirements, etc., and achieve the effect of reducing loss, simple structure and low cost
Active Publication Date: 2021-06-01
温州贝塔电子科技有限公司 +1
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Problems solved by technology
However, this solution has the disadvantages of large transformer loss, high voltage of the power tube, high heat dissipation requirements, difficult design and high cost.
Method used
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[0036] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:
[0037] Assuming that the inverter modules have the same parameters, without loss of generality, the present invention uses the inverter module with the serial number j (1≤j≤n) as the object of illustration.
[0038] figure 1 The schematic diagram of the high-voltage AC power supply is shown. The input ends of the inverter modules are connected in parallel with each other and connected to the input end of the low-voltage DC power supply. The output ends of the inverter modules are connected in series and then connected to the output end of the high-voltage AC power supply. The synchronous signal line is connected, and the output voltage value of the high-voltage AC power supply is regulated by changing the value of the number n of the inverter modules. The synchronization signal line is used for transmission of the synchronization signal syn and the average ...
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The invention provides a modularized middle-high voltage alternating current power supply. The power supply comprises a low-voltage direct current power supply input end, a plurality of low-voltage inversion modules and a high-voltage alternating current power supply output end. The input ends of the low-voltage inversion modules are connected in parallel and are connected with the low-voltage direct current power supply input end; and the output ends of the low-voltage inversion modules are sequentially connected in series and then connected with the high-voltage alternating-current power supply output end, synchronous terminals J of the low-voltage inversion modules are connected through a synchronous signal line, an output alternating-current voltage level is expanded by changing the number of the inversion modules connected in series, and transmission of synchronous signals and output voltage-sharing reference is achieved based on a time division multiplexing principle. A single-bus data transmission method in a non-communication bus mode is adopted, the structure is simple, the loss of a transformer in a traditional inversion scheme is greatly reduced, the cost is low, the practicability is high, and a new scheme is provided for the middle-high voltage alternating current power supply.
Description
technical field [0001] The invention relates to the field of power electronics, in particular to a modular medium and high voltage AC power supply. Background technique [0002] Low-temperature plasma technology realized by corona discharge or dielectric barrier discharge is widely used in air purification, sewage treatment and dirt cleaning on material surfaces. However, in order to generate corona discharge or dielectric barrier discharge, a high-voltage AC power supply must be required, and its voltage amplitude ranges from several thousand volts to tens of thousand volts. In the field of automotive air purification, the input of high-voltage AC power supply is 12V DC, and the output is high-voltage AC. Since the effective value of the output voltage is much higher than the amplitude of the input voltage, the common inverter scheme is realized by using a high-turn-ratio high-frequency transformer and a DC conversion circuit. It boosts the DC voltage by a large multiple, ...
Claims
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IPC IPC(8): H02M1/088
CPCH02M1/088
Inventor 彭志辉袁鑫
Owner 温州贝塔电子科技有限公司