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High-energy feedback type load energy backflow release circuit and energy release method thereof

A technology of discharging circuit and energy, which is applied in the field of high-energy feedback load energy return discharging circuit, which can solve the problems of over-limit heat capacity, unreliability and small size of components, and achieve low cost, high reliability and small size. Effect

Active Publication Date: 2019-12-20
CHINA SPALLATION NEUTRON SOURCE SCI CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defects and deficiencies in the prior art, the present invention provides a high-energy feedback type load energy return discharge circuit and its energy discharge method, which solves the problem of large current flowing through the internal components of the power supply in the energy storage and feedback grid scheme. The unreliable problem caused by the thermal capacity of the components exceeding the limit, the speed of the inverter H-bridge and the thyristor branch cooperate to complete the discharge of the load energy, the invention has high reliability, small size and low cost

Method used

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  • High-energy feedback type load energy backflow release circuit and energy release method thereof
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  • High-energy feedback type load energy backflow release circuit and energy release method thereof

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Embodiment 1

[0030] Such as figure 1 As shown, this embodiment provides a high-energy feedback type load energy return discharge circuit, including: four IGBT devices (V1, V2, V3, V4), a first inductor L1, a second inductor L2, a first capacitor C1, The second capacitor C2 and the thyristor V5;

[0031] In this embodiment, each IGBT device is connected in parallel with a diode, the C pole of each IGBT device is connected to the cathode of the diode, and the E pole is connected to the anode of the diode. In the bridge circuit, the C poles of IGBT devices V1 and V3 are connected to the positive pole of the third capacitor (ie bus capacitor) C3, the E poles of IGBT devices V2 and V4 are connected to the negative pole of the third capacitor (ie bus capacitor) C3, and one end of the first inductor L1 Connected to the E pole of the IGBT device V1, the other end is connected to the regenerative load, and connected to the first end of the first capacitor C1, the second end of the first capacitor ...

Embodiment 2

[0043] The technical solution of this embodiment 2 is except the following technical features, and other technical solutions are identical with embodiment 1:

[0044] In order to solve the problem of insufficient withstand voltage of a single high-current thyristor, the thyristor branch of this embodiment is configured as a thyristor V5 connected in series with a diode V6. The positive peak voltage of the circuit in this embodiment is 6kV, and the negative peak voltage does not exceed 3kV;

[0045] Such as Figure 5 As shown, the cathode of the thyristor V5 is connected to the first end of the first capacitor C1, the anode of the thyristor V5 is connected to the cathode of the diode V6, the anode of the diode V6 is connected to the first end of the second capacitor C2, and both ends of the thyristor V5 are connected in parallel with a voltage equalizing resistor R1 , the two ends of the diode V6 are connected in parallel with a voltage equalizing resistor R2. When the power ou...

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Abstract

The invention discloses a high-energy feedback type load energy backflow release circuit and an energy release method thereof. The circuit comprises an H-bridge circuit, a first inductor, a second inductor, a thyristor branch and a feedback type load. The H-bridge circuit is provided with a first IGBT, a second IGBT, a third IGBT and a fourth IGBT, each IGBT device is connected with a diode in parallel, a C electrode of each IGBT device is connected with a negative electrode of the diode, and an E electrode of each IGBT device is connected with a positive electrode of the diode. Two ends of the first inductor are respectively connected with an E electrode of the first IGBT and one end of the feedback type load, and two ends of the second inductor are respectively connected with a C electrode of the fourth IGBT and another end of the feedback type load. A first energy consumption path is formed by the first IGBT, the diode connected with the third IGBT in parallel, the first inductor, the second inductor and the feedback type load, and the thyristor branch is connected with the feedback type load in parallel to form a second energy consumption path. The inverter H bridge is matchedwith the thyristor branch quickly and slowly to complete load energy release, the reliability is high, the size is small, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a high-energy feedback load energy return discharge circuit and an energy discharge method thereof. Background technique [0002] In general, for energy feedback loads, all energy stored in the load is fed back to the power supply when the power is turned off. The way to deal with energy feedback includes feeding back to the grid, storing, and discharging; when the energy is fed back, the energy stored in the load is fed back to the bus inside the power supply through the diode of the H bridge. If the capacity of the bus capacitor, the voltage level and the load energy are not properly matched, it may cause overvoltage damage to the bus capacitor; in the prior art, a three-phase PWM rectifier is configured on the AC grid side to complete the load energy feedback, but the entire system Power devices are complicated, bulky, and costly to produce, and the entire control me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02H02M1/32
CPCH02H9/025H02M1/32
Inventor 齐欣张文庆郝祖岳刘云涛张旌黄远李君
Owner CHINA SPALLATION NEUTRON SOURCE SCI CENT