Control method of three-phase DC converter

A technology of a DC converter and a control method, which is applied in the directions of conversion equipment, output power conversion devices, electrical components, etc., which are intermediately converted to AC, can solve the problem of high voltage stress of the output rectifier diode, high voltage stress of the switching tube, and output current. Large pulsation and other problems, to achieve the effect of solving high voltage stress, reducing voltage stress and prolonging service life

Active Publication Date: 2016-05-04
忱芯电子(苏州)有限公司
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Problems solved by technology

In the case of a wide input voltage range, the traditional voltage source DC converter has the problems of large input current pulsation and high voltage stress of the output rectifier diode, while the traditional current source DC converter has the problems of large output current pulsation and high voltage stress of the switching tube
In addition, although the input and output current ripple of the existing three-phase six-leg DC converter is small, the voltage stress of the output rectifier diode is still high, and the switching tube is circulated, which increases the loss

Method used

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  • Control method of three-phase DC converter

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Embodiment Construction

[0009] Depend on figure 1 It can be seen that the three-phase DC converter of the present application includes an input power supply Uin , a first full-bridge conversion circuit 1, a second full-bridge conversion circuit 2, a third full-bridge conversion circuit 3 and a filter circuit 4, wherein the first full-bridge conversion circuit 1 includes a first switching tube S 1 , the second switch tube S 2 , the third switch tube S 3 , the fourth switch tube S 4 , isolation transformer T 1 , the first diode D 1 , the second diode D 2 , the third diode D 3 and the fourth diode D 4 , the second full-bridge conversion circuit 2 includes a fifth switching tube S 5 , the sixth switch tube S 6 , the seventh switch tube S 7 , the eighth switch tube S 8 , isolation transformer T 2 , the fifth diode D 5 , the sixth diode D 6 , the seventh diode D 7 and the eighth diode D 8 , the third full-bridge conversion circuit 3 includes a ninth switching tube S 9 , the tenth switch tub...

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Abstract

The invention discloses a control method of a three-phase DC converter, belonging to a control method of a DC-DC converter. The three-phase DC converter comprises an input power supply, three full-bridge conversion circuits and a filtering circuit, wherein the phases of output rectification voltages of a first full-bridge conversion circuit, a second full-bridge conversion circuit and a third full-bridge conversion circuit are the same, and the total output rectification voltage is achieved to be three times of the output rectification voltage of the single full-bridge conversion circuit. The control method is applicable for an occasion with wide input voltage, the problems of high voltage stress of a traditional voltage source converter diode and large output current pulse of a current source converter are solved, the weight and the volume of a filtering inductor are reduced, the voltage and current stresses of a power switching tube are reduced, and the voltage stress of a diode is reduced.

Description

technical field [0001] The invention relates to a control method of a converter, in particular to a control method of a three-phase DC converter. Background technique [0002] In recent years, energy shortage and environmental pollution have become the focus of the world, and the development and application of renewable energy have attracted widespread attention from all over the world. In the renewable energy power generation system, the electricity generated by photovoltaic cells is DC with low voltage and wide range of variation, while DC power with higher voltage is required for power transmission to the grid, so a DC converter is required to convert DC with low voltage and wide range of variation It is a high-voltage direct current suitable for grid connection. In the field of clean energy electric vehicles, it is often necessary to convert the low-voltage and wide-ranging direct current provided by the fuel cell or battery into a higher-voltage direct current, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28H02M1/14
CPCH02M1/14H02M3/28H02M1/0077
Inventor 姚志垒徐静徐进于学华陈冲顾春雷陈荣
Owner 忱芯电子(苏州)有限公司
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