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Boost inverter

An inverter and boost inductor technology, applied in the field of power electronic converters, can solve problems such as low conversion efficiency and high-frequency leakage current, and achieve the effects of improving efficiency, reducing switching loss and flexible value selection.

Active Publication Date: 2017-08-22
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high-frequency leakage current and low conversion efficiency in the boost inverter in the prior art, the present invention provides a boost inverter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, a boost inverter in this embodiment, the power supply U in The anode of the diode is connected to the anode of the diode D, U in The cathode of the diode D is connected to one end of the boost inductor L, and the other end of the boost inductor L is connected to the switch tube S 1 The first end of the switch tube S 2 The first terminal and the capacitor C2 One end of the connection, the switch tube S 1 The second terminal of the ground, the capacitor C 2 The other end of the switch tube S 4 The first end of the switch and the switch S 6 connected to the second end of the switch tube S 4 The second end of the ground. Switch tube S 2 The second terminal and the capacitor C 1 One end of the switch and the switch S 3 connected to the first end of the capacitor C 1 The other end of the ground, the switch tube S 3 The second end of the switch tube S 6 The first end of the switch tube S 5 connected to the second end of the switch tube ...

Embodiment 2

[0045] combine figure 1 , a boost inverter in this embodiment, the power supply U in The anode of the diode is connected to the anode of the diode D, U in The cathode of the diode D is connected to one end of the boost inductor L, and the other end of the boost inductor L is connected to the switch tube S 1 The first end of the switch tube S 2 The first terminal and the capacitor C 2 One end of the connection, the switch tube S 1 The second terminal of the ground, the capacitor C 2 The other end of the switch tube S 4 The first end of the switch and the switch S 6 connected to the second end of the switch tube S 4 The second end of the ground. Switch tube S 2 The second terminal and the capacitor C 1 One end of the switch and the switch S 3 connected to the first end of the capacitor C 1 The other end of the ground, the switch tube S 3 The second end of the switch tube S 6 The first end of the switch tube S 5 connected to the second end of the switch tube S 5 T...

Embodiment 3

[0047] This embodiment combines Figure 2-8 Any technical scheme is analyzed in embodiment 1-2.

[0048] 3.1 Boost ratio analysis

[0049] Such as figure 1 shown, the capacitor C 1 、C 2 Share a boost inductor L, under the joint action of DC input power, C 1 、C 2 The energy storage is realized. Under the conditions of different switch combinations, the capacitance C 1 、C 2 Discharge to the output side, the front end of the filter can obtain the polar SPWM waveform voltage, and then through the freewheeling of the switch tube, the inverter process is finally realized. Among them, the function of the diode D is to ensure that the energy can only flow in one direction from the DC power supply to the load, and prevent the load energy from being fed back to the input side.

[0050] The switching tube modulation strategy is shown in 2. The modulation wave is the absolute value of the sine wave, compared with the triangular wave carrier to obtain the PWM wave, as the switch t...

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Abstract

The invention discloses a boost inverter, and belongs to the technical field of power electronic converters. A positive electrode of a power supply Uin is connected with one end of a boost inductor L, a negative electrode of the Uin is grounded, the other end of the boost inductor L is connected with the first end of a switch tube S1, the first end of a switch tube S2 and one end of a capacitor C2, the second end of the switch tube S1 is grounded, the other end of the capacitor C2 is connected with the first end of a switch tube S4 and the second end of a switch tube S6, and the second end of the switch tube S4 is grounded. The second end of the switch tube S2 is connected with one end of a capacitor C1 and the first end of a switch tube S3, the other end of the capacitor C1 is grounded, the second end of the switch tube S3 is connected with the first end of the switch tube S6 and the second end of the switch tube S5, and the first end of the switch tube S5 is grounded. For the problems that a traditional boost inverter has high frequency leakage current, and the conversion efficiency is low, the conversion efficiency of the boost inverter is high, and no high frequency leakage current exists.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a boost inverter. Background technique [0002] In the prior art, when DC voltage is converted into AC voltage, the two-stage method of combining DC boost and inverter is often used. The two-stage cascaded inverter of the front stage DC / DC and the rear stage DC / AC can convert the DC voltage is converted to AC voltage. However, the two-stage cascaded inverter requires many devices, large volume and weight, and low conversion efficiency. In order to achieve stable operation of the system, the matching adjustment between the front stage and the rear stage is relatively complicated. The existing non-isolated traditional bridge-type boost inverter still has the problem of high-frequency leakage current. High-frequency leakage current will not only bring conduction and radiation interference, increase the harmonic content of incoming current and system loss, but al...

Claims

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Application Information

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IPC IPC(8): H02M7/537H02M7/539
CPCH02M7/537H02M7/539H02M1/0038H02M1/0054Y02B70/10
Inventor 胡雪峰张玉勃陈浩张梦
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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