Single-phase pfc circuit power frequency ripple elimination method and pfc topology system, charging pile system

Abstract

The invention discloses a single-phase PFC (Power Factor Correction) circuit power frequency ripple eliminating method, a PFC topological system and a charging pile system. The single-phase PFC circuit comprises a single-phase PFC device, a phase-shifting control full bridge circuit and a transformer, wherein the single-phase PFC device is connected with the phase-shifting control full bridge circuit; the phase-shifting control full bridge circuit is connected with the transformer; the transformer is connected with a load. By adopting the single-phase PFC circuit power frequency ripple eliminating method, the PFC topological system and the charging pile system, the output voltage and load voltage of the single-phase PFC device 100 can be acquired. The phase-shifting time is calculated through a preset phase-shifting time calculation model according to a preset circuit parameter, and the phase-shifting control full-bridge circuit is driven to perform phase-shifting adjustment accordingto a corresponding driving signal generated by the phase-shifting time in order to keep voltage fundamental wave which is transmitted to the two ends of the load through each carrier period of the phase-shifting control full bridge circuit constant, thereby eliminating power frequency ripple caused by the single-phase PFC circuit, and effectively improving the security of the single-phase PFC circuit.

Description

technical field

[0001] The present application relates to the technical field of switching power supplies, in particular to a single-phase PFC circuit power frequency ripple elimination method, a PFC topology system, and a charging pile system. Background technique

[0002] With the development of electronic power technology, in order to reduce the pollution of harmonics to the power grid, power electronic products with power factor correction (Power Factor Correction, PFC) circuits are more and more widely used. There are many types of power factor correction circuits, which can be divided into different types of power factor correction circuits according to different classification standards. Among them, according to the input source of the power factor correction circuit, the power factor correction circuit can be divided into a single-phase power factor correction circuit and a three-phase single-phase power factor correction circuit.

[0003] Because the instantaneous ...

Examples

Embodiment Construction

[0024] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.

[0025] see Figure 1-Figure 2 , a single-phase PFC circuit power frequency ripple elimination method, including step S100, step S200 and step S300, the single-phase PFC circuit includes a single-phase PFC device 100, a phase-shift control full-bridge circuit 200 and a transformer 300, the single-phase PFC device 100 is connected to the phase-shift control full-bridge circuit 200, and the phase-shift control full-bridge circuit 200 is conn...

technical field

[0001] The present application relates to the technical field of switching power supplies, in particular to a single-phase PFC circuit power frequency ripple elimination method, a PFC topology system, and a charging pile system. Background technique

[0002] With the development of electronic power technology, in order to reduce the pollution of harmonics to the power grid, power electronic products with power factor correction (Power Factor Correction, PFC) circuits are more and more widely used. There are many types of power factor correction circuits, which can be divided into different types of power factor correction circuits according to different classification standards. Among them, according to the input source of the power factor correction circuit, the power factor correction circuit can be divided into a single-phase power factor correction circuit and a three-phase single-phase power factor correction circuit.

[0003] Because the instantaneous ...

Examples

Embodiment Construction

[0024] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Preferred embodiments of the application are shown in the accompanying drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the application more thorough and comprehensive.

[0025] see Figure 1-Figure 2 , a single-phase PFC circuit power frequency ripple elimination method, including step S100, step S200 and step S300, the single-phase PFC circuit includes a single-phase PFC device 100, a phase-shift control full-bridge circuit 200 and a transformer 300, the single-phase PFC device 100 is connected to the phase-shift control full-bridge circuit 200, and the phase-shift control full-bridge circuit 200 is conn...

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