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Three-phase multi-step wave inverter

An inverter device and multi-step technology, applied in the inverter field, can solve problems such as loss and electromagnetic radiation, and achieve the effects of improving output voltage capability, convenient control, and reducing overall volume and weight

Inactive Publication Date: 2018-06-22
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] PWM technology is currently the most widely used, but due to the limitations of switching devices and technical characteristics, there are still some insurmountable problems, including the loss caused by too high switching frequency, the tolerance of switching devices to current and voltage, and the utilization of output voltage. Rate, the influence of the dead zone on the output voltage, too high switching frequency produces electromagnetic radiation, causing electromagnetic compatibility problems

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.

[0029] Such as Figure 1-3 As shown, the present invention includes a three-phase main inverter 1, a three-phase auxiliary inverter 2, a circular transformer 3 and a power supply 5, and the input terminals of the three-phase main inverter 1 and the three-phase auxiliary inverter 2 Both ends of the power supply 5 are connected with a filter capacitor 10, the output end of the three-phase main inverter 1 is connected to one end of the secondary three-phase winding 7 of the circular transformer 3, and the secondary three-phase winding 7 of the circular transformer 3 The other end of the phase winding 7 is connected to the load 12 , and the output end of the three-phase auxiliary inverter 2 is connected to both ends of the primary thr...

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Abstract

The invention discloses a three-phase multi-step wave inverter, which comprises a three-phase main inverter, a three-phase auxiliary inverter, a circular transformer and a power supply, wherein inputends of the three-phase main inverter and the three-phase auxiliary inverter are connected with the power supply; an output end of the three-phase main inverter is connected with one end of a secondary three-phase winding of the circular transformer; the other end of the secondary three-phase winding of the circular transformer is connected with load; and the output end of the three-phase auxiliary inverter is connected with two ends of a primary three-phase winding of the circular transformer. The three-phase multi-step wave inverter is simple in structure, convenient to control and low in switching frequency. Through electromagnetic superposition, the output voltage capacity of the inverter can be improved and the output voltage waveform is improved.

Description

technical field [0001] The invention belongs to the field of inverter technology, and in particular relates to a three-phase multi-step wave inverter device. Background technique [0002] Inversion refers to the DC / AC conversion of electric energy through the switching on and off of semiconductor power switching devices, and is one of the basic conversions of power electronics technology. Nowadays, inverter technology plays an important role in industrial automation, transportation, urban power supply, national defense and other fields, especially in the field of development and utilization of new energy. The inverter can be divided into the following three categories in terms of technical approaches: multiple superposition technology using low-frequency switching devices, PWM technology using high-frequency switching devices, and technology combining multiple superposition or multi-level with PWM. The above technologies have their own technical advantages, but there are al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M1/12H02M1/44H01F38/18
CPCH01F38/18H02M1/12H02M1/44H02M7/5387H02M1/0054Y02B70/10
Inventor 王铁军冯进姜晓弋方芳熊欣
Owner NAVAL UNIV OF ENG PLA
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