Pre-charging circuit applied to alternating-current and direct-current bidirectional inverter power supply module
A technology of pre-charging circuit and power module, which is applied in the direction of reversible conversion equipment, electrical components, output power conversion devices, etc., can solve the problems that cannot meet the requirements and the pre-charging scheme is not applicable, etc.
Pending Publication Date: 2021-10-08
QINGDAO TOPSCOMM COMM +1
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Problems solved by technology
For high-power bidirectional AC-DC inverter power modules, the requirements cannot be met
[0005] In view of the inapplicability of the current pre-charging scheme, this patent proposes a pre-charging circuit applied to bidirectional AC-DC inverter power modules
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[0019] 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. Such as figure 1 As shown, because the inverter power supply module has bidirectional power flow characteristics, a pre-charging circuit that satisfies two working modes is proposed under the condition of sharing a set of pre-charging resistors.
[0020] Such as figure 2 As shown, when the inverter power module works in the inverter mode, the forward pre-charging circuit charges the bus capacitor. High-voltage DC input, the two input lines are L and N respectively. The main circuit breaker QS1 on the DC side is connected in series with the DC input terminal, the main circuit breaker is closed, an...
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The invention relates to the field of power electronics, and particularly relates to a pre-charging circuit applied to an alternating-current and direct-current bidirectional inverter power supply module. The circuit comprises a forward pre-charging circuit, a reverse pre-charging circuit and a bypass rectifying circuit. The forward pre-charging circuit meets the bus capacitor pre-charging requirement of the power supply module when the power supply module works in a DC-to-AC (inverter mode) mode, and the forward pre-charging circuit and the reverse pre-charging circuit share a group of pre-charging resistors RY; the reverse pre-charging circuit meets the bus capacitor pre-charging requirement when the power supply module works in an AC-to-DC (rectification mode) mode; and the bypass rectifying circuit and the body diode of the module main circuit power switch are naturally rectified to obtain the same rectified voltage. The pre-charging requirements of the inverter power supply module applied to different working modes are met, and the power-on reliability of the system is ensured. As the pre-charging resistor is public, the number of extra pre-charging resistors is prevented from being increased, the utilization rate of the pre-charging resistor is improved, and the pre-charging circuit has the advantages of short charging time and small pre-charging loss.
Description
technical field [0001] The invention relates to the field of power electronics, in particular to a precharging circuit applied to an AC / DC bidirectional inverter power supply module. Background technique [0002] With the rapid development of power electronics technology and the promotion of new power semiconductor devices, the requirements for different power conversion methods in different applications have been realized. After the application of new energy has become a hot spot in the industry, the corresponding power electronic energy conversion method has emerged as the times require. In addition, the increasing demand for electric energy means that electronic electronic conversion equipment is developing rapidly in the direction of high voltage and high power. [0003] The pre-charging circuit is an important part of the AC-DC bidirectional inverter power supply module, and its main function is to pre-charge the bus capacitor when the system is powered on. Avoid stro...
Claims
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Login to View More IPC IPC(8): H02M1/32H02M7/66
CPCH02M1/32H02M7/66
Inventor 范建华徐鹏飞陈晨王潇吴季超靳俊杰
Owner QINGDAO TOPSCOMM COMM