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Bi-directional converting topology

A bidirectional converter and topology technology, applied in the direction of converting DC power input to DC power output, AC power input converting to DC power output, and having reversible conversion equipment, etc., can solve the problems of complex structure and high price, and achieve Guaranteed EMC performance, low cost, and improved efficiency

Inactive Publication Date: 2014-06-18
FONRICH NEW ENERGY TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bi-directional converters are a relatively new demand, and the current products have disadvantages such as complex structure and high price, which require continuous technological advancement to meet industry needs

Method used

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Examples

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Embodiment Construction

[0013] image 3 , Figure 4 It is a working schematic diagram of the bidirectional converter topology of the present invention.

[0014] image 3 Shown is the working principle of power flowing from the DC side to the AC side: At this time, the switches S5 and S6 are in the state of high-frequency chopping switching, and S5 and S6 are turned on or off at the same time; when S5 and S6 are in the on state, the inductor L1 and L2 charging, the rising and continuing circuit is in the off state; when S5 and S6 are in the off state, the current of the inductors L1 and L2 continues to flow through the rising and continuing circuit; The current is commutated to realize the polarity change of the AC output; the up-and-down circuit can adopt the diode free-wheeling mode, that is, the free-wheeling current flows through the diode in the up-and-down circuit, or the synchronous free-wheeling mode, that is, the free-wheeling current flows from The switch tube in the rising and continuing...

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Abstract

The invention belongs to the electronic conversion field, realizes the mutual conversion of a direct current and an alternating current, and can be widely used in systems of power supply, energy storage, motor driving and braking which need the mixing of the direct current and the alternating current. A switching tube is respectively in series connection onto the positive terminal and the negative terminal of the direct current side, an inductance is respectively connected behind each switching tube, a boosted and freewheeling circuit is connected between the connecting positions of the two inductance and the switches, an H bridge is connected at the other side of the inductances, and capacitors are connected directly in the middle point of the two bridge arms of the H bridge and are alternating current output ends. The bi-directional converting topology uses a relatively simple topological structure, realizes the direct bi-directional flowing of the direct current and the alternating current, can realize rectification, inversion, frequency conversion, reactive power control and the like, and can be widely used in the energy storage, the direct current and alternating current mixing system, the motor driving and braking and the like.

Description

technical field [0001] The invention belongs to the field of power conversion, realizes direct current and alternating current mutual conversion, and can be widely used in systems requiring mixed alternating current and direct current, energy storage, motor drive and braking, and the like. Background technique [0002] With the development of productivity, there is more and more demand for AC-DC hybrid power supply systems, such as new energy storage systems, smart micro-grid systems, high-voltage DC UPS systems, new energy charging stations, new energy power systems, motor variable frequency drives and control systems. Move and so on. Such systems often require energy storage, DC power supply and AC power supply. The most important device in the system is the bidirectional converter, which is also called bidirectional inverter, inverter charger, battery inverter, etc. in some occasions. . Its role is to connect the AC system and the DC system to realize energy conversion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/72
CPCH02M7/72H02M3/1582H02M7/797
Inventor 张永
Owner FONRICH NEW ENERGY TECH LTD
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