Voltage-sharing control method of half-bridge three-level LLC converter circuit
A half-bridge three-level, voltage-equalizing control technology, applied in the direction of regulating electrical variables, control/regulating systems, high-efficiency power electronic conversion, etc. Uneven pressure and other problems to achieve the effect of ensuring reliability and stability
Active Publication Date: 2021-04-16
GUOCHUANG INNOVATION CENTER OF MOBILE ENERGY (JIANGSU) CO.,LTD.
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] At present, the commonly used half-bridge three-level LLC converter has the advantages of low voltage stress of the main power tube and the switch tube can realize ZVS, etc., and is suitable for high-voltage input power conversion applications, such as being suitable for use in charging piles, but , due to the differences in the parameters of the drive circuit and the main circuit components, there is a risk of uneven voltage in the voltage dividing capacitor, which is likely to affect the safe operation 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] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0024] In one embodiment of the present invention, as figure 1 As shown, the half-bridge three-level LLC converter circuit may include a voltage divider circuit 10, a switch tube bridge arm circuit 20, a resonant circuit 30, a transformer 40 and an output circuit 50, wherein the voltage divider circuit 10 and the switch tube bridge arm circuit 20 connected in parallel, and the midpoint of the voltage divider circuit 10 is connected to the midpoint of the switc...
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
The invention provides a voltage-sharing control method of a half-bridge three-level LLC converter circuit. The voltage-sharing control method comprises the following steps: setting a working mode of a half-bridge three-level LLC converter circuit; detecting the duty ratio of each switching tube in the half-bridge three-level LLC converter circuit in the set working mode; detecting the capacitor voltage of each voltage dividing capacitor in the half-bridge three-level LLC converter circuit in the set working mode; calculating the voltage difference between the voltage-dividing capacitors according to the capacitor voltage; calculating the advanced turn-off time of the switching tube according to the voltage difference; and controlling the switch tube to be turned off in advance according to the duty ratio, the capacitor voltage and the advanced turn-off time so as to increase or reduce the charging or discharging time of the voltage-dividing capacitor. According to the invention, voltage sharing between the voltage dividing capacitors can be realized so that reliability and stability of the converter can be guaranteed.
Description
technical field [0001] The invention relates to the technical field of switch control, in particular to a voltage equalization control method for a half-bridge three-level LLC converter circuit. Background technique [0002] At present, the commonly used half-bridge three-level LLC converter has the advantages of low voltage stress of the main power tube and the switch tube can realize ZVS, etc., and is suitable for high-voltage input power conversion applications, such as being suitable for use in charging piles, but , due to the differences in the parameters of the drive circuit and the main circuit components, there is a risk of uneven voltage in the voltage dividing capacitor, which is likely to affect the safe operation of the converter. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the above-mentioned technologies at least to a certain extent. Therefore, the object of the present invention is to propose a vol...
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 Applications(China)
IPC IPC(8): H02M3/335
CPCY02B70/10
Inventor 毛宇阳杨志
Owner GUOCHUANG INNOVATION CENTER OF MOBILE ENERGY (JIANGSU) CO.,LTD.