Control method and device for interleaved totem-pole circuit and single-channel totem-pole circuit
A control method and totem pole technology, which are applied to output power conversion devices, electrical components, and AC power input to DC power output, etc., can solve the problem that the switch tube cannot be turned on at zero voltage, and achieve zero voltage turn-on. Effect
Active Publication Date: 2018-12-25
EMERSON NETWORK POWER CO LTD
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Problems solved by technology
[0006] Embodiments of the present invention provide a control method and device for an interleaved totem pole circuit and a single totem pole circuit, to solve the problem in the prior art that the switch tube on the high frequency bridge arm cannot be turned on at zero voltage
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[0045]In order to provide the implementation scheme for the zero-voltage turn-on of the high-frequency bridge arm switch tube, the embodiment of the present invention provides a control method and device for an interleaved totem pole circuit and a single-way totem pole circuit. For illustration, it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0046] An embodiment of the present invention provides a control method for a single-way totem pole circuit, such as image 3 As shown, the following steps may be included:
[0047] Step 301, for the input inductance in the single-way totem pole circuit, detect the current of the input inductance;
[0048] Step 302, when the freewheeling switch tube on the high frequency bri...
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The invention discloses a control method and apparatus for a staggered totem-pole circuit and a one-way totem-pole circuit. By virtue of the control method and apparatus, zero-voltage switch-on of a high-frequency bridge arm switching tube can be realized, the circuit loss can be lowered, and the circuit efficiency can be improved. The control method comprises the steps of detecting a current of each of multiple input inductors in the staggered totem-pole circuit; when a follow current switching tube on a high-frequency bridge arm connected with the input inductor is in a switch-on state while a main switching tube is in a switch-off state, if it is detected that the current of the input inductor does not achieve a corresponding preset reverse current, controlling the follow current switching tube in the switch-on state to be in the switch-on state continuously, and controlling the main switching tube in the switch-off state to be in the switch-off state continuously; and if it is detected that the current of the input inductor achieves the corresponding preset reverse current, controlling the follow current switching tube in the switch-on state to be switched off, and controlling the main switching tube in the switch-off state to be switched on.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a control method and device for an interleaved totem pole circuit and a single-way totem pole circuit. Background technique [0002] High-efficiency power conversion circuits in the prior art mainly include figure 1 The single totem pole circuit shown and figure 2 The interleaved totem pole circuit shown. [0003] figure 1 In the single-way totem pole circuit shown, the switch tubes Qsr1 and Qsr2 form a power frequency bridge arm, which can also be composed of two diodes, and the switch tubes Q1 and Q2 form a high frequency bridge arm; The bridge arm and the high-frequency bridge arm are connected in parallel, and the two ends of the parallel connection are used as the DC terminal of the single-way totem pole circuit; the midpoint of the high-frequency bridge arm is connected to one end of an input inductance L1, and the other end of the input inductance L1 and The...
Claims
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IPC IPC(8): H02M7/219
Inventor 刘志敏
Owner EMERSON NETWORK POWER CO LTD