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Three-winding coupling inductance type Z-source inverter circuit with high step-up ratio ability

A technology of coupled inductance and high boost ratio, which is applied in the direction of conversion equipment without intermediate conversion to AC, electrical components, output power conversion devices, etc., can solve problems such as poor boost capability and low boost, and achieve boost Ratio, increase the boost multiple, improve the effect of the working range

Inactive Publication Date: 2016-03-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of poor boosting capability and low boosting ratio of existing Z-source inverters, and to provide a three-winding coupled inductance Z-source inverter circuit with high boosting ratio capability

Method used

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  • Three-winding coupling inductance type Z-source inverter circuit with high step-up ratio ability
  • Three-winding coupling inductance type Z-source inverter circuit with high step-up ratio ability
  • Three-winding coupling inductance type Z-source inverter circuit with high step-up ratio ability

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specific Embodiment approach 1

[0014] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the three-winding coupled inductance type Z-source inverter circuit with high step-up ratio capability described in this embodiment includes a three-phase inverter 1 and a three-winding coupled inductance type Z-source network 2, a DC power supply V in The output terminal is connected to the input terminal of the three-winding coupled inductive type Z-source network 2, the output terminal of the three-winding coupled inductive type Z-source network 2 is connected to the input terminal of the three-phase inverter 1, and the output terminal of the three-phase inverter 1 is the load powered by;

[0015] The three-winding coupled inductance type Z-source network 2 includes a capacitor C1, a capacitor C2, a three-winding inductor, a diode D1, a diode D2, and a diode D3, and the three-winding inductor is composed of a primary winding N1, a secondary winding N2, and a secondary windi...

specific Embodiment approach 2

[0017] Specific implementation mode two: the following combination figure 2 and image 3 Describe this embodiment mode, this embodiment mode will further explain Embodiment 1, and the three-winding coupled inductance type Z-source inverter circuit includes two states:

[0018] State 1, straight-through state: diode D1 is turned off, diode D2 and diode D3 are turned on, and the voltage of the secondary winding N2 is clamped at the voltage V across the capacitor C1 c1 , the voltage of the secondary winding N3 is clamped at the voltage V across the capacitor C2 c2 ;

[0019] State 2, non-through state: diode D1 is on, diode D2 and diode D3 are off, DC power V in Charge the primary winding N1 while inducing voltages across the secondary winding N2 and secondary winding N3.

[0020] In the present invention, when the turns ratio of the three-winding inductor is N1:N2:N3=2:1:1, compared with the boost ratio of the traditional Z-source inverter such as Figure 4 As shown, the c...

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Abstract

The invention relates to a three-winding coupling inductance type Z-source inverter circuit with high step-up ratio ability and belongs to the inverter technical field. The objective of the invention is to solve the problems of low step-up ability and low step-up ratio of an existing Z-source inverter. The three-winding coupling inductance type Z source inverter circuit of the invention includes a three-phase inverter and a three-winding coupling inductance type Z-source network; the positive pole output end of a direct-current power source is connected with the positive pole end of a primary winding N1; the negative pole end of the primary winding N1 is connected to the anode of a diode D1; the cathode of the diode D1 is connected with the anode of a diode D2, the positive pole of a capacitor C1 and the positive pole end of a secondary winding N2 simultaneously; the negative pole of the capacitor C1 is connected with the negative pole of the direct-current power source and the negative pole input end of the three-phase inverter simultaneously; the cathode of the diode D2 is connected with the positive pole of a capacitor C2 and the positive pole end of a secondary winding N3 simultaneously; the negative pole of the capacitor C2 is connected with the negative pole end of the secondary winding N2 and the anode of a diode D3 simultaneously; and the cathode of the diode D3 is connected with the negative pole end of the secondary winding N3, and at the same time is connected with the positive pole input end of the three-phase inverter. The three-winding coupling inductance type Z-source inverter circuit of the invention is applied to direct-current power sources.

Description

technical field [0001] The invention belongs to the technical field of inverters. Background technique [0002] As an AC power supply, voltage source inverters are widely used in AC motor drive systems, UPS, induction heating systems, battery distributed AC power supplies, static var generators and other fields. The traditional three-phase voltage source inverter converts DC to AC to supply power to the load through the inverter. However, because the traditional inverter power supply cannot achieve boost control, its application is subject to many restrictions, and in order to prevent the bridge arm from passing through If the device is damaged, the dead time needs to be set, which will affect the quality of the output waveform and increase the harmonic content. [0003] In order to solve the above problems, a Z-source inverter is proposed, which has the characteristics of flexible input power, no need for large-capacity energy storage components, compact structure, small s...

Claims

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Application Information

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IPC IPC(8): H02M7/5387H02M3/08
CPCH02M3/08H02M7/5387H02M1/0067
Inventor 张千帆董帅王好乐王睿张璞汝
Owner HARBIN INST OF TECH