Totem pole bridgeless power factor correction circuit control method and device
A power factor correction and circuit control technology, which is applied in the direction of output power conversion devices, electrical components, high-efficiency power electronics conversion, etc., can solve problems such as reverse, input bridge arm rectifier reverse current loss, etc., to prevent reverse Loss, prevent inductive current reverse problem, low cost effect
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Embodiment 1
[0071] For the totem pole bridgeless PFC control method provided in this embodiment, please refer to image 3 , which specifically includes the following steps:
[0072] Step 1, obtaining the working mode of the totem pole bridgeless power factor correction circuit;
[0073] Step 2, obtaining the first duty ratio of the main pipe and the second duty ratio of the freewheel tube according to the working mode;
[0074] Step 3, controlling the working states of the main pipe and the freewheel tube according to the first duty cycle and the second duty cycle.
[0075] For step 1, for a totem pole bridgeless power factor correction circuit, the working mode of the totem pole bridgeless power factor correction circuit must be obtained first, so as to adopt different methods for the totem pole bridgeless power factor correction circuit in different working modes To obtain the duty cycle of the circuit supervisor and the freewheeling tube, the method of obtaining the working mode, ple...
Embodiment 2
[0099] This embodiment provides a totem pole bridgeless power factor correction circuit control device, please refer to Image 6 , which specifically include:
[0100] The first acquisition module 11, the first acquisition module 11 is used to acquire the working mode of the totem pole bridgeless power factor correction circuit;
[0101] The second acquisition module 12, the second acquisition module 12 is used to acquire the first duty cycle corresponding to the main tube in the totem pole bridgeless power factor correction circuit and the corresponding first duty ratio of the freewheel tube in the totem pole bridgeless power factor correction circuit in the working mode. The second duty cycle;
[0102] A control module 13, the control module 13 is used for controlling the working states of the main pipe and the freewheel tube according to the first duty ratio and the second duty ratio.
[0103] Specifically, for a totem pole bridgeless power factor correction circuit, it i...
Embodiment 3
[0119] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following will combine figure 1 , take the input L as positive and N as negative, that is, Q2 is the supervisor, and Q1 is the freewheeling tube. The specific implementation of the DCM, CRM, and CCM modes of the present invention will be further described in detail. Obviously, the described embodiment is only the present invention. Invent some embodiments, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0120] If the totem pole bridgeless power factor correction circuit is in DCM or CRM mode, when the DCM mode and CRM mode, the control method provided by the patent of the present invention is the same, but the totem pole bridgeless power factor correction circuit in these two modes has...
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Abstract
Description
Claims
Application Information
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