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Switch driving circuit and multi-level cascaded power unit topology using same

A technology for switching drive circuits and power units, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as unsuitability for use, low input voltage range, and low output voltage of linear power supplies, and achieve simplified design and high reliability. effectiveness and practicality, reducing the cost of the design

Pending Publication Date: 2020-01-17
GUANGDONG UNLIMITED POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its input voltage range is low, so it is not suitable for applications above 800V, and the output voltage of linear power supply is also low.

Method used

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  • Switch driving circuit and multi-level cascaded power unit topology using same
  • Switch driving circuit and multi-level cascaded power unit topology using same
  • Switch driving circuit and multi-level cascaded power unit topology using same

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Embodiment Construction

[0027] This part will describe the specific embodiment of the present invention in detail, and the preferred embodiment of the present invention is shown in the accompanying drawings. Each technical feature and overall technical solution of the invention, but it should not be understood as a limitation on the protection scope of the present invention.

[0028] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0029] I...

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Abstract

The invention discloses a switch driving circuit and a multi-level cascaded power unit topology using the same. The switch driving circuit is characterized by comprising a charging switch K1, an energy storage linear discharging assembly, a driving coil L1 and a controllable switch Q2, wherein an external power supply is electrically connected with the energy storage linear discharging assembly through the charging switch K1 to form a charging loop, the driving coil L1 can drive an external bypass contact switch K2, and the controllable switch Q2 can be switched on and off according to an external control signal; the driving coil L1 and the controllable switch Q2 are connected in series to form a series branch, and the series branch is connected with the energy storage linear discharge assembly to form a power supply loop. By reasonably controlling the controllable switch Q2, the reliable switching-on of the bypass can be realized. Meanwhile, the design is simplified, the design cost is reduced, and the very high reliability and practicability are achieved.

Description

technical field [0001] The invention relates to the field of drive circuits, in particular to a switch drive circuit and a multi-level cascaded power unit topology using the same. Background technique [0002] Multi-level cascaded topologies, such as reactive power compensation, frequency converters, DC distribution networks, etc., are widely used in the field of medium and high voltage power grids, such as electric power, rail transit, and new energy fields. In order to ensure the safe and reliable operation of multi-level cascaded equipment, a bypass function needs to be designed. When a cascaded power unit fails, the internal bypass function of the power unit bypasses the faulty unit, avoiding the expansion of the fault, maintaining the normal operation of the equipment, and avoiding greater economic losses. [0003] However, in current bypass switch drive circuits of multi-level cascaded power units, switching power supplies are mostly used as power supplies. Due to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/36H02M7/483H02M3/155H02J3/18
CPCH02J3/1821H02M1/36H02M3/155H02M7/483H02M7/4835Y02E40/30
Inventor 徐元龙彭国平史奔段博孟庆良
Owner GUANGDONG UNLIMITED POWER CO LTD
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