General convertor based on the mixed switch

A hybrid and converter technology, applied in the direction of converting AC power input to DC power output, output power conversion device, high-efficiency power electronic conversion, etc., can solve the problems of high price and many devices

Inactive Publication Date: 2007-10-17
杭州迪源电气科技有限公司
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Problems solved by technology

[0007] The performance of the converter composed of fully controlled devices is usually

Method used

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  • General convertor based on the mixed switch
  • General convertor based on the mixed switch
  • General convertor based on the mixed switch

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Embodiment Construction

[0106] The embodiment of invention scheme I

[0107] An implementation example of Scheme I is shown in Figure 15. Figure 15a can be used for rectification and inversion, in which the thyristor bridge BR devices all use reverse-resistance fast thyristors, K1 and ordinary asymmetric IGBTs are used, and K2 is an ordinary asymmetric IBGT with a small capacity (only considering the instantaneous current There is a certain margin) to form a fast diode in series, and K2 can also directly use a reverse-resistance IGBT. Usually, when dealing with three-phase symmetrical current and voltage problems, the parameters of C1 and L1 are designed according to the requirements of filtering high-frequency pulses. If problems such as unbalanced current and voltage need to be dealt with, the inductance of L1 can be increased.

[0108] The difference between Fig. 15b, Fig. 15c and Fig. 15a is that the position of K2 is different. The converter in Figure 15b uses diodes, which can only be used f...

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PUM

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Abstract

The present invention provides a universal convertor based on a mixed type switch. The convertor circuit which is adapted to form a series of new switch power supply convertors almost having no energy saving ability only adopts a spot of all-controlled switches, and common thyristors. Devices derived from the present invention are: a reactive power compensator of electrical power grid, an active electric power filter, a sine inverter, a quasi-square wave inverter, an AC-DC transducer working in four quadrants, a bidirectional AC-DC-AC sine wave transducer, controllable rectifier having a power factor approximating to 1 and the content of harmonic wave approximating to 0, etc. The universal convertor can be applied widely in the fields of power supply of electric automobile, frequency and speed control, electric traction, uninterruption power sources, new energy convertor, electrochemistry power supply, medium frequency power supply, electrical energy quality improvement of electric power system. The device in the present invention has advantages of excellent electric property, reduced material cost, volume and weight, harmonic waves that are almost eliminated comparing to the common technology, and has a high value of application and generalizing.

Description

technical field [0001] The invention belongs to high-power rectification, inverter and frequency conversion speed regulation equipment. Background technique [0002] Three-phase AC and DC conversion, AC and AC conversion, is the most basic content of high-power power technology. The related devices of AC / DC conversion mainly include rectifier and inverter. The former is to convert AC to DC, and the latter is to convert DC to AC. AC / AC conversion usually undergoes two AC / DC conversions, that is, AC-DC-AC conversion; AC / AC direct conversion is also useful, such as matrix conversion, but it has not been promoted; another example is a cycloconverter, which has a large harmonic content , the power factor and operating frequency are both low. [0003] The basic form of AC / DC three-phase converter is the form of Figure 1a composed of six devices (representing six bridge arms). The six switches in Figure 1a (K A 、K B 、K C 、K X 、K Y 、K Z ) represents six bridge arms, a, b, ...

Claims

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Application Information

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IPC IPC(8): H02M7/162H02M1/12H02M1/14H02M1/42
CPCY02B70/126Y02B70/10
Inventor 吕征宇汪槱生
Owner 杭州迪源电气科技有限公司
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