Control type soft-switching technology for inverter

A soft switching and inverter technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve the inability to realize ZVS or ZCS, dependence, inverter volume and cost increase And other issues

Inactive Publication Date: 2014-08-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

Passive soft switching technology only uses passive devices to realize zero-voltage or zero-current switching of switching devices, which is more dependent on load conditions, such as ZVS or ZCS cannot be achieved at light loads
Active soft switching technology can achieve soft switching conditions in the full load range, but usually based on some specific topologi

Method used

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  • Control type soft-switching technology for inverter
  • Control type soft-switching technology for inverter
  • Control type soft-switching technology for inverter

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Embodiment Construction

[0031] Such as Figure 5 As shown in FIG. 1 , the schematic diagram of the single-phase full-bridge inverter and its control circuit involved in the embodiment of the present invention.

[0032] Figure 5 The main circuit topology 10 of the medium single-phase full-bridge inverter includes a DC source E, four power switch tubes Q 1 , Q 2 , Q3 and Q 4 , two inductors Ls and Lc, filter capacitor Cs, where: the positive pole of the power supply E and the power switch tube Q 1 The drain and the power switch tube Q 3 The drain of the power supply E is connected to the negative pole of the power switch tube Q 2 source and Q 4 The source is connected, the switching tube Q 1 The source and switch Q 2 The drain is connected, the switching tube Q 3 The source and switch Q 4 The drain is connected, and one end of the inductor Ls is connected to Q 1 The source is connected, the other end is connected to one end of the capacitor Cs and one end of the inductor Lc, and the other e...

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Abstract

The invention discloses a control type soft-switching technology for an inverter, and belongs to the field of power electronic converters. The control type soft-switching technology for the inverter is suitable for the traditional full-bridge inverter topology with low power and the traditional half-bridge inverter topology with low power. According to the soft-switching technology, a zero voltage switch environment of a switch device is built by controlling the positive direction, the negative direction and the reverse direction of the output inductive current in one cycle. For the three modulation modes of the inductive current, a digital-analog hybrid control circuit and method which are simple and easy to implement are provided. The control type soft-switching technology for the inverter has the advantages of being high in efficiency, small in size of a passive element, low in cost and the like and is especially suitable for small-power application occasions.

Description

technical field [0001] The invention relates to the field of power electronic converters, in particular to the soft switching technology of inverters, and especially belongs to the technical field of low-power inverters. Background technique [0002] In order to pursue higher power density and better dynamic characteristics, the operating frequency of converters continues to increase. However, increasing the switching frequency will not only increase the switching loss but also may bring more serious EMC noise. To better solve these problems, soft switching technology must be adopted. Scholars at home and abroad have proposed a variety of soft-switching technologies for inverters, which can be roughly divided into passive soft-switching technologies and active soft-switching technologies. Passive soft switching technology only uses passive devices to realize zero-voltage or zero-current switching of switching devices, which is more dependent on load conditions, such as ZVS...

Claims

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Application Information

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IPC IPC(8): H02M1/36H02M7/5387
Inventor 胡海兵
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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