Power source module with wide input voltage range

Abstract

The invention relates to a power module of wide input voltage scope which comprises a first and a second power input terminals, a rectifying filtrating circuit, a converting circuit which is connected between the first and the second power input ends and the rectifying filtrating circuit, the converting circuit is connected with the first and the second power input ends by the rectifying circuit, and the converting circuit comprises a first converter and a second converter; under the working mode of low voltage, the first converter and the second converter output in parallel connection; under the working mode of high voltage, and the first converter and the second converter output in series. Applying the power module of wide input voltage scope of the invention can realize high voltage input, the input voltage of the single converter is half of the input voltage, and the problem of voltage limitation of power devices is solved. When voltage is low, parallel connection is in favor of selecting other power tubes with smaller current. The wastage of power devices is distributed, thus being in favor of heat design. In the wide voltage scope, the utilization rate of the input DC filtrating capacitor is improved greatly. To alter the voltage scope, simple allocation is only carried out before use.

Description

Technical field [0001] The invention relates to a power supply module, and more specifically, to a power supply module with a wide input voltage range. Background technique [0002] For the global market, there are many grid systems: 220V / 380V systems in Europe and China, 208V in North America, and 480V and 600V. The power modules on the current market usually have an input voltage limited to 220V, and some are also compatible with 110V. For 600V input, considering the 10% fluctuation of the power grid, the voltage after rectification exceeds 900V. Under such a high voltage, the selection of power devices is very difficult. It is also possible to directly design a converter with a wide voltage range. For example, three-level can be used to achieve high input voltage, but the current stress of the device design in this way needs to be considered for low voltage, and the voltage stress needs to be considered for high voltage, which greatly increases the cost. Summary of the invent...

AI Technical Summary

Problems solved by technology

For example, three levels can be used to achieve high input voltage, but the current stress of the designed device needs to be considered for low voltage, and the voltage stress needs to be considered for high voltage, which greatly increases the cost

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