Totem-pole PFC (power factor correction) fully-digital control method and device

A control method and digital controller technology, applied in the direction of output power conversion device, climate sustainability, high-efficiency power electronic conversion, etc., can solve the problems of poor control effect and easy interference of digital control, and achieve the elimination of output occupation Empty ratio disturbance, improving the ability to track power frequency sinusoidal current, improving the effect of anti-interference and stability

Active Publication Date: 2018-03-30
武汉矩阵能源科技有限公司
View PDF7 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a full digital control method and device of a totem pole

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Totem-pole PFC (power factor correction) fully-digital control method and device
  • Totem-pole PFC (power factor correction) fully-digital control method and device
  • Totem-pole PFC (power factor correction) fully-digital control method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] The invention provides an all-digital control method of a totem-pole PFC, which reduces the input current THD and improves the anti-interference degree of the digital PFC.

[0028] This method comprises the steps:

[0029] (1) Voltage outer loop control method:

[0030] (A) Monitor the input AC voltage of the totem PFC. When the input AC voltage of the totem PFC is monitored to cross zero, the monitoring module sends a zero-crossing detection signal, and the digital controller captures the flip edge of the zero-crossing detection signal to perform digital phase locking;

[0031] (B) Monito...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a totem-pole PFC fully-digital control method and device. The method comprises acquiring corresponding voltage and current information through a sampling module, after digitalphase locking is completed, computing effective value and phase value of input voltage, adjusting error signals through a voltage outer loop adjuster and a current inner loop adjuster, and performingfeed forward compensation on an output duty ratio through duty ratio feed forward. According to the totem-pole PFC fully-digital control method, by introducing the duty ratio feed forward, the currentinner loop adjuster only needs to inhibit small signal disturbance, so that the capability of a controller on tracking power frequency sine-wave current; by collecting the zero crossing point of input voltage for digital phase locking, querying a sine table to acquire the phase value of the input voltage, collecting the real-time value of the input voltage for effective value computation and taking the computed real-time value of the input voltage as input current instruction value and the input value of a feed forward duty ratio computing module, the totem-pole PFC fully-digital control method can eliminate output duty ratio disturbance led by input voltage sampling deviation and improve anti-interference performance and stability of digital control totem PFCs.

Description

technical field [0001] The invention belongs to the field of power factor correction, and more specifically relates to a full digital control method and device of a totem pole PFC. Background technique [0002] In order to solve the harmonic pollution caused by power electronic devices to the power grid, power factor correction (PFC, PowerFactor Correction) technology has been developed rapidly. Compared with the bridged Boost PFC, the bridgeless Boost PFC has higher efficiency and smaller volume, but the traditional bridgeless Boost PFC has strong common mode interference and large EMI. Totem Boost PFC, as an evolution of bridgeless Boost PFC, has many advantages such as high efficiency, high power density, and low common-mode interference. However, the traditional Si MOSFET parasitic body diode has a long reverse recovery time and serious reverse recovery loss. It can work in CRM mode, but the input current ripple and THD are relatively large, which limits the practical a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H02M1/42H02M7/219
CPCH02M1/4208H02M7/219H02M1/0012H02M1/0016Y02B70/10
Inventor 刘邦银赵文成李其琪段善旭
Owner 武汉矩阵能源科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap