Six-switch circuit topology of non-isolated full-bridge inverter and its monitoring method

A technology of full-bridge inverter and switch tube, which is applied in circuit breaker testing, conversion of irreversible DC power input to AC power output, emergency protection circuit devices, etc., which can solve the problem of increasing circuit common-mode interference and causing Problems such as current harmonics and faults that cannot be detected by the circuit system can achieve the effect of reducing common mode interference and avoiding damage

Active Publication Date: 2017-08-01
XIAN LONTEN RENEWABLE ENERGY TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] In this control mode, the switch tube S 3 and S 6 Once damaged or its driving circuit fails, the inverter can still maintain its working state, but it will bring current harmonics and increase the common mode interference of the circuit, and the circuit system itself cannot detect the fault

Method used

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  • Six-switch circuit topology of non-isolated full-bridge inverter and its monitoring method
  • Six-switch circuit topology of non-isolated full-bridge inverter and its monitoring method
  • Six-switch circuit topology of non-isolated full-bridge inverter and its monitoring method

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] An embodiment of the present invention provides a six-switch circuit topology of a non-isolated full-bridge inverter, such as figure 1 shown, including the first switching tube S 1 , the second switch tube S2 , the third switch tube S 3 , the fourth switch tube S 4 , the fifth switch tube S 5 , the sixth switch tube S 6 , the first diode D 1 , the second diode D 2 , the first inductance L 1 , the second inductance L 2 ; The first switch tube S 1 The drain and the fourth switching tube S 4 The drain is connected to the anode of the DC bus, the first switching tube S 1 source and the second switch S 2 The drain connection of the second switching tube S 2 The source and the third switch S 3 The drain connection of the third switching tube S 3 source and the sixth switch S 6 The source of the DC bus is connected to the catho...

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Abstract

The invention discloses a six-switching-tube circuit topology of a non-isolated type full bridge inverter. On the basis of an existing six-switching-tube circuit topology, a first inductor L1 is connected with one end of a first capacitor C1, one end of the first capacitor C1 is further connected with an L line of a power grid and one end of a second capacitor C2, and the other end of the first capacitor C1 is connected with one end of the second capacitor C2 and one end of a first resistor R1. The other end of the second capacitor C2 is connected with the other end of a second inductor L2 and connected with an N line of the power grid. The other end of the first resistor R1 is connected with an anode or a cathode of a direct current bus. The invention further discloses a monitoring method of the six-switching-tube circuit topology of the non-isolated type full bridge inverter. Whether a fifth switch tube and a sixth switch tube fail can be judged by detecting the voltage at the two ends of the first resistor R1, therefore, the inverter can be turned off in time to be protected, and further damage to the inverter can be avoided.

Description

technical field [0001] The invention belongs to the technical field of six-switch tube circuit topology of a non-isolated full-bridge inverter, and in particular relates to a six-switch tube circuit topology of a non-isolated full-bridge inverter and a monitoring method thereof. Background technique [0002] The current six-switch circuit topology of the non-isolated full-bridge inverter uses unipolar modulation, that is, in the positive half cycle of the power grid, S 5 Chang Tong, S 1 and S 6 Simultaneously on and off, S 2 , S 3 , S 4 Normally off; in the negative half cycle of the power grid, S 2 Chang Tong, S 3 and S 4 Simultaneously on and off, S 1 , S 5 , S 6 Always off. [0003] In this control mode, the switch tube S 3 and S 6 Once damaged or its driving circuit fails, the inverter can still maintain its working state, but it will bring current harmonics and increase the common mode interference of the circuit, and the circuit system itself cannot monito...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/48H02H7/122G01R31/327
CPCG01R31/327H02H7/1225H02M7/5387
Inventor 陈桥梁朱飞倪嘉
Owner XIAN LONTEN RENEWABLE ENERGY TECH
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