Novel capacitor energy storage isolation type single-stage four-quadrant inverter

A capacitor energy storage and isolation technology, applied in the direction of adjusting electrical variables, instruments, electrical components, etc., can solve problems such as complex circuit structure, and achieve the effect of reducing volume, reducing switching loss, and reducing system loss.

Pending Publication Date: 2021-10-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Description
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Problems solved by technology

The traditional isolated four-quadrant inverter, as described in the article "A New Four-Quadrant Multi-level Converter" in the magazine "Power Automation Equipment", is based on the former DC / DC and the latter DC / AC. , the two-stage inverter with the primary side energy storage capacitor as the medium, the circuit structure is relatively complicated, and the energy conversion is through multi-stage transformation

Method used

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  • Novel capacitor energy storage isolation type single-stage four-quadrant inverter
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  • Novel capacitor energy storage isolation type single-stage four-quadrant inverter

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0017] Such as figure 1 As shown, the design and invention of a new isolated single-stage four-quadrant inverter for capacitor energy storage, the input power U d positive terminal of the clamp capacitor C C , The upper end of the primary side of the transformer T is connected. Clamp capacitor C C The other end of the second power tube S 2 The drain is connected, and its source is connected to the first...

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Abstract

The invention relates to a novel capacitor energy storage isolation type single-stage four-quadrant inverter, and belongs to an inverter in an electric energy conversion device. The adopted high-frequency transformer has the functions of boosting and electrical isolation; the primary side adopts an active clamping circuit to reduce the switching loss of a switching tube; the secondary side of the transformer adopts a full-bridge hybrid modulation inverter circuit, and a bus energy storage capacitor is connected in series with a switching tube, so that excess energy is prevented from being fed back to a primary side direct current bus side, the energy conversion stage number is reduced, energy is stored in the bus energy storage capacitor, and energy balance of the energy storage capacitor is realized in each power frequency period. Therefore, the function of four-quadrant operation is realized, the efficiency of the inverter is improved, and the size of the inverter is reduced.

Description

technical field [0001] The invention relates to a novel single-stage full-bridge inverter circuit with bus capacitor energy storage, which belongs to the inverter in the electric energy conversion device. Background technique [0002] With the rapid development of the economy, the demand for electric energy is also increasing. Regardless of civil and industrial applications, the demand for electric energy is becoming more and more extensive, and the application occasions are also diverse (such as satellite power systems, uninterruptible power supplies (UPS), motor drives, etc.), and AC power is the most used in these occasions. widely. This has higher and higher requirements on the wide applicability, high efficiency and reliability of the inverter. The traditional isolated four-quadrant inverter, as described in the article "A New Four-Quadrant Multi-level Converter" in the magazine "Power Automation Equipment", is based on the former DC / DC and the latter DC / AC. , The tw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M3/335
CPCH02M7/5387H02M3/33569
Inventor 吴小华徐伟张智芳王新征李宏亮
Owner NORTHWESTERN POLYTECHNICAL UNIV
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