Current trapezoidal wave converter
A converter and trapezoidal wave technology, applied in the field of current trapezoidal wave converter circuit, can solve the problems of large effective value, high current peak value, increasing the current stress and conduction loss of the main power device of the converter
Active Publication Date: 2020-04-21
上海英联电子系统有限公司 +2
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, since the LLC circuit realizes the soft switching of each switching device through the resonance of the resonant inductor, resonant capacitor and transformer excitation inductance, the current of the primary side and the secondary side of the converter is an approximate sine wave, and its current peak value is high, the effective value is large, and the large Increase the current stress and conduction loss of the main power device of the converter
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] From the above analysis, it can be seen that if the resonant capacitor Cr of the LLC resonant converter is replaced by the controllable voltage source Vaux, and the inductance Lr is excited, maintained and demagnetized at an appropriate time, a trapezoidal wave current can be generated in the main circuit of the converter. Realize the trapezoidal wave changer circuit. Vaux can be implemented in a variety of forms. It can be a fixed-level voltage source, using a switch tube to switch between excitation, maintenance, and demagnetization. Figure 5 , attached Figure 6 As shown; it can also be a capacitor, which uses the energy storage of the capacitor to cooperate with the opening and closing of the auxiliary switch tube to excite, maintain and demagnetize the inductor Lr, as shown in the attached Figure 8 , attached Figure 9 shown. At the same time, this working principle is not only applicable to the half-bridge LLC resonant converter circuit, but also applicable t...
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
Login to View More Abstract
This patent invention relates to the field of switching power supplies, in particular to a family of novel current trapezoidal wave converter circuits; the new type of current trapezoidal wave converter circuit can be realized by replacing the resonant capacitor with a controllable voltage source in all LLC converters. Therefore, is a family of converters. This patent description takes the half-bridge current trapezoidal wave converter as an example to illustrate the basic working principle of the new current trapezoidal wave converter circuit; In addition to the advantages of low voltage stress, its main power circuit current is a trapezoidal current wave, and the effective value of the main power circuit current is small, which improves the efficiency of the converter. This patent proposes a method for realizing the auxiliary voltage source by using the auxiliary switch tube and the voltage source or capacitor; at the same time, using the primary inductance, or the energy storage of the transformer excitation inductance and leakage inductance, the auxiliary voltage source and the auxiliary switch tube can be realized. Zero voltage switching.
Description
[0001] Technical field: [0002] The invention relates to the field of switching power supplies, in particular to a family of current trapezoidal wave converter circuits. The circuit has the advantages of zero-voltage switching of the main switching tube, zero-current shutdown of the rectifying switching tube, and low voltage stress of the rectifying switching tube. The switch loop current is a trapezoidal current wave, which further reduces the effective value of the current and improves the efficiency of the converter. Background technique [0003] The LLC resonant converter is widely used in the industrial field due to its simple circuit, zero-voltage switching of the main switching element, zero-current shutdown of the rectifier to avoid reverse recovery loss, and low voltage stress of the secondary rectifier. attached figure 1 Shown is the half-bridge LLC resonant converter. However, since the LLC circuit realizes the soft switching of each switching device through the ...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33569H02M1/0058Y02B70/10
Inventor 李斌
Owner 上海英联电子系统有限公司