Power supply and its output voltage low-frequency ripple compensation method

A power supply and output voltage technology, which is applied in the direction of high-efficiency power electronic conversion, output power conversion device, DC power input conversion to DC power output, etc., can solve the complex structure of derivative circuits, affect other characteristics, increase costs, etc. question

CN105490544BActive Publication Date: 2018-05-08ACBEL POLYTECH INC
4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-05-08

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a power supply device and an output voltage low frequency ripple compensation method thereof. The power supply device includes a power factor correction circuit and a DC to DC conversion circuit; and a DC / DC controller of the DC to DC conversion circuit acquires zero-crossing information and load information of an alternating current power supply of the power factor correction circuit through a communication protocol and performs low frequency ripple compensation on a control instruction according to the information with a table lookup manner. In this way, the power supply device and the method can solve the problem that the complexity of the controller is improved due to the conventional compensation technologies, and the whole property can be affected or the cost is increased.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a power supply and its output voltage low-frequency ripple compensating method, in particular to a power factor correction circuit on the primary side of the power supply for zero-crossing of AC power supply and load information to a DC-to-DC conversion circuit. The related technology of compensating the control command of the DC conversion circuit with the look-up table method. Background technique

[0002] A known switching power supply such as Figure 4 As shown, it includes a rectifier circuit 81, a power factor correction circuit 82 and a DC-to-DC conversion circuit 83, etc.; wherein: the rectifier circuit 81 converts the AC power supply AC in into a DC power supply, and the power factor correction circuit 82 and The output terminal of the rectifier circuit 81 is connected, and includes an inductor L1, a diode, a power switch S1 and a PFC controller located on the DC power circuit, wherein the PFC controller is con...

Examples

Embodiment Construction

[0035] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0036] For a preferred embodiment of the power supply of the present invention, please refer to figure 1 As shown, it includes a rectifier circuit 10, a power factor correction circuit 20 and a DC to DC conversion circuit 30, etc.; wherein:

[0037] The rectifier circuit 10 has an AC power input terminal and a DC power output terminal, and the AC power input terminal is connected to an AC power supply AC in for converting the AC power AC in into a DC power supply; the power factor correction circuit 20 Connected between the DC power output terminal of the rectifier circuit 10 and the DC voltage input terminal of the DC-to-DC conversion circuit 30 .

[0038] The power factor correction circuit 20 includes an inductor L1, a diode, a power switch S1 and a PFC controller 21 located on the DC power loop, wherein the PFC controlle...