Low Voltage DC-DC active clamp converter
The invention relates to electrical engineering, in particular DC-DC converters, and can be used in secondary power supply systems to convert, regulate and stabilize the DC output voltage galvanically separated from the input DC voltage and reduce static and dynamic power losses.
The object of the invention is to generate a low-voltage DC output voltage from a high-voltage DC input voltage and to reduce dynamic and static losses.
In the device, the beginning of the primary 1 of the transformer 2 is connected to the positive pole of the input DC voltage source, and the end of the primary 1 is connected to the negative pole of the input DC voltage source through a controlled power switch 3, implemented in the form of a MOSFET. In parallel with the primary winding 1 of the transformer 2, connected a clamping element consisting of a capacitor 4 connected in series with an additional switch 5 implemented in the form of a MOSFET. The beginning of the first secondary winding 6 is connected to the beginning of the second secondary winding 7. The end of the first secondary is connected to the cathode of diode 8, and the end of the second secondary winding 7 is connected to the cathode of diode 9, the anodes of diodes 8 and 9 are combined into a common connection point. The common points of the origins of the secondary windings of the transformer and the common connection points of the anodes of diodes 8 and 9 are connected to the input of the LC filter 10, the load 11 is connected in parallel to the output terminals. The control electrodes of the switches 3, 5 are connected to the pulse width controller 12.
The invention relates to electrical engineering, in particular DC-DC converters, and can be used in secondary power supply systems to convert, regulate and stabilize the DC output voltage galvanically separated from the input DC voltage and reduce static and dynamic power losses.
There are known DC voltage converters with active clamping [1].
The disadvantage of the known DC voltage converter with active clamping is the difficulty of obtaining a low output voltage of units of volts, the possibility of switching on the power switch to zero current value, which leads to an increase in dynamic losses when it is switched on and a decrease in static losses at a low level of output voltage due to the voltages on the rectifier diodes in the conductive state commensurate with the level of output voltage.
The closest technical solution to the proposed device is the DC voltage converter with active clamping, given in [1], containing the primary winding of the transformer, connected through a controlled power switch to the terminals of the input DC voltage source, in parallel to which the clamping element is connected, consisting of a capacitor and an additional switch connected in series, a transformer that performs electrical isolation and obtaining the required level of constant output voltage, secondary windings connected via rectifier diodes to the input of the LC filter, to the output of which the load is connected.
The object of the invention is to generate a low-voltage DC output voltage from a high-voltage DC input voltage and to reduce dynamic and static losses.
The objective is accomplished by the fact that in a Low Voltage DC-DC active clamp converter the primary winding of the transformer of which is connected through a controlled power switch to the terminals of the input DC voltage source, in parallel to which the clamping element is connected, and two secondary windings with a different number of turns with diodes connected in series are connected in phase and in parallel and are connected to the input terminals of the LC filter, to the output terminals of which the load is connected.
The proposed Low Voltage DC-DC active clamp converter, in comparison with the known device, makes it possible to form a low-voltage DC output voltage from a high DC input voltage with a decrease in static and dynamic power losses
Complete Specification
| Country | Current Status | Patent Application Number | Patent Applicant | Patent Number | Title | Google Patent Link |
| India | Patent Pending | 202517109191 | Polikarpov Vladimir Anatolyevich | Low Voltage DC-DC active clamp converter | Click to open |