Power conversion system with clamp mode switching
A power conversion system and mode switching technology, which is applied in high-efficiency power electronic conversion, output power conversion devices, control/regulation systems, etc., can solve problems such as poor light-load efficiency, multiple copper losses and iron losses, and large resonance currents , to achieve the effect of improving the overall efficiency, easy operation and saving circuit cost
Active Publication Date: 2019-02-05
CHICONY POWER TECHNOLOGY(SUZHOU) CO LTD
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Problems solved by technology
Specifically, at the time of heavy load, because the active clamp flyback power conversion system has the advantage of zero voltage switching (zero voltage switching, ZVS), its heavy load efficiency is higher than that of the passive clamp flyback power conversion system. High, but at light load, its light load efficiency will be worse than passive clamp flyback power conversion system
The main reason is that the active clamp flyback power conversion system needs to maintain a large resonant current even under light load in order to meet the zero voltage switching, which will cause more copper loss and iron loss, resulting in The efficiency is worse than passive clamp flyback power conversion system
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[0061] In order to make the above-mentioned features and effects of the present invention more clear and understandable, the following specific examples are given together with the accompanying drawings for detailed description as follows.
[0062] see Figure 1A It is a schematic circuit block diagram of the first embodiment of the power conversion system of the present invention. The power conversion system 100 includes a clamp conversion circuit 10 , a switching circuit module 20 , a PWM control module 30 and a feedback (feedback) control module 40 . The clamp conversion circuit 10 receives and converts the input power Vin to the output power Vout, and can operate in an active clamping mode or a non-active clamping mode. The switching circuit module 20 and the PWM control module 30 are coupled to the clamp conversion circuit 10 , and the switching circuit module 20 is coupled to the PWM control module 30 . The feedback control module 40 is coupled to the switching circuit ...
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The present invention relates to a power conversion system with clamp mode switching. The power conversion system with clamp mode switching includes a clamp conversion circuit, a switching circuit module, a PWM control module, and a feedback control module. The PWM control module stabilizes a feedback voltage when the feedback control module feeds the feedback voltage back to the switching circuitmodule and the PWM control module. The switching circuit module switches the clamp conversion circuit to operate in an active clamp mode or a non-active clamp mode.
Description
technical field [0001] The invention relates to a power conversion system with clamping mode switching, in particular to a power conversion system operable to switch between an active clamping mode and a non-active clamping mode. Background technique [0002] With the rapid development of the field of power electronics, the application of converters to convert power systems is becoming more and more widely used, especially the current electronic products are increasingly required to have high power density, high reliability, small size, and high efficiency. characteristics. Generally, in the application of the power conversion system, it is most common to apply a flyback converter (flyback converter), which has the advantages of circuit isolation, simple structure, and low cost. At present, flyback power conversion systems mainly include active clamp flyback power conversion systems and passive clamp flyback power conversion systems (or non-active clamp flyback power conver...
Claims
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IPC IPC(8): H02M3/335
CPCH02M3/33569Y02B70/10H02M1/0032H02M1/342H02M3/33507H02M3/33546H02M3/33592
Inventor 彭左任陈炳胜
Owner CHICONY POWER TECHNOLOGY(SUZHOU) CO LTD