Switch power supply paralleled current sharing control circuit applying UC3907
A switching power supply, flow control technology, applied in the direction of conversion equipment with intermediate conversion to AC, can solve the problems of difficult design and selection of electrical components, low system reliability, etc., to prevent high-frequency noise spikes from being transmitted to the output. , High control accuracy, the effect of increasing control response speed and control accuracy
Inactive Publication Date: 2013-04-17
DALIAN MARITIME UNIVERSITY
View PDF1 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
This technology uses an improved version of a magnetic sensor called LCM (Low Frequency Magneto Resistive) that improves its performance over existing sensors due to better insulation properties compared to other types of sensing devices such as inductor or transformer type detectors. It also includes various techniques for controlling the input/output characteristics of the system including pulse width modulated signals, phase locked loops, analog feedback circuits, digital feedback circuited systems, etc., resulting in more precise measurement capabilities. Overall, this new design enhances the functionality and efficiency of electronic components used within electricity management applications like regulating energy consumption.
Problems solved by technology
Technological Problem addressed in this patented technical problem involves developing an improved way to connect or distribute electricity from one source (such as wind) to another without overloading any other parts due to excessive heat generated by these connections during operation.
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
[0021] Such as figure 2 Shown is the system diagram of switching power supply parallel operation in the embodiment of the present invention, power module 1, power module 2 ... power module n work in parallel, the input DC power supply is the same DC power supply, IN+ is the input high potential end of the DC power supply, IN- is the DC power supply The power supply input low potential end; the output positive potential OUT+ terminals of n switching power supplies are connected together, and the negative potential OUT- terminals are connected together; the 15 pins of the current equalizing controller UC3907 of each power module are connected to the SHARE BUS. Each power module includes a main circuit and a feedback control loop. The main circuit is composed of an inverter circuit, a high-frequency transformer T, and an output rectifier filter circuit. The feedback control loop is composed of a voltage detection circuit, a current detection circuit, and a current sharing control...
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 discloses a switch power supply paralleled current sharing control circuit applying UC3907 and belongs to the technical field of electric power electronics. The voltage sampling and the current sampling adopt LEM (laser energy monitor) modules based on Hall devices, and higher output voltage and current can be collected; an output voltage control outer ring of a switch power supply adopts a voltage error amplifier inside the UC3907, and a current sharing control inner ring adopts a regulating amplifier inside the UC3907; in a compensating loop, greater gains can be obtained during the low frequency when a mode of serially connecting a resistor R9 with a capacitor C5 is adopted, and the gain can be fast increased when being lower than a certain frequency, so higher control precision can be reached, a capacitor C6 is parallelly placed on a serial connection branch of the R9 and the C5, the high-frequency gain drops, and the high-frequency noise peak is prevented from being transmitted to the output end; and the non-isolated connection is adopted between the UC3907 and a driving control PWM (pulse width modulation) signal generator SG3525, and the control response speed and the control precision are accelerated and improved.
Description
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 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 Owner DALIAN MARITIME UNIVERSITY