A digital soft start method for llc converter

A soft start and converter technology, which is applied in the direction of converting DC power input to DC power output, instruments, and adjusting electric variables, etc., can solve the problem that the inrush current cannot be limited within a certain range, and achieve control and reduce Effect of Inrush Current
CN105515365BInactive Publication Date: 2018-06-12GUANGDONG UNIV OF TECH
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG UNIV OF TECH
Publication Date
2018-06-12
Estimated Expiration
Not applicable · inactive patent

Smart Images

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

Abstract

The invention provides an LLC converter digital soft start method. The method sequentially includes the three steps of firstly, setting the upper limit value and the lower limit value of the current of a resonance inductor during initial soft start, and limiting the surge current during start within the range of stable work of a circuit; secondly, applying a drive pulse when the bus voltage Vin is a stable value, wherein the relation that Irh is smaller than Irl is met, the bus voltage rises from zero when the drive pulse is applied, and the relation that Irh is larger than Irl is met; thirdly, accurately calculating the switch-on and switch-off time of each switching tube by solving the differential equation according to design parameters of the circuit. By means of the method, the surge current of the resonance inductor during start can be limited within the range of the stable work of the circuit, and the surge current of the resonance inductor during start can be greatly reduced.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of power electronics and electric transmission, in particular to a digital soft-start method of an LLC converter used in DC / DC (direct current / direct current) conversion. Background technique

[0002] As we all know, electric energy conversion, especially DC / DC (direct current / direct current) conversion technology is widely used in various electronic devices, such as PCs, cellular telephones and the like. This is because the various sub-circuits that make up these devices need to maintain normal operation at different voltage levels, and the DC / DC (direct current / direct current) converter is used to convert from DC power to the required voltage levels. .

[0003] As a common linear regulator for DC / DC conversion, it often dissipates too much heat. Nowadays, LLC (inductance-capacitance-inductance) converter has been widely used because of its advantages of high efficiency, smooth waveform and high power den...

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