A multi-state power factor correction circuit and power conversion equipment
A power factor correction and circuit technology, which is applied in the field of power electronics, can solve the problems of complex structure of the current controller and large number of current sampling circuits, and achieve the effect of simplifying the structure and reducing the number
Active Publication Date: 2017-12-29
EMERSON NETWORK POWER CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The embodiment of the present invention provides a multi-state power factor correction circuit, which is used to solve the problems of the existing interleaved parallel power factor correction circuit with a large number of current sampling circuits and a complicated structure of the current controller
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
[0027] In the multi-state power factor correction circuit provided by the embodiment of the present invention, since each bridge arm in each multi-state switch circuit is connected to each winding in the same transformer, when each multi-state switch circuit in the multi-state power factor correction circuit When two bridge arms are included, since the same-named end of the primary winding of the transformer is connected to the opposite-named end of its secondary winding, and the number of turns of the primary winding of the transformer is equal to the number of turns of its secondary winding, the transformer The current on the primary winding of the transformer is equal to the current on the secondary winding; and when each multi-state switch circuit in the multi-state power factor correction circuit includes three or more bridge arms, since the primary side of the transformer The same-named ends of the windings are connected, and the secondary windings of the transformer are ...
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 embodiment of the invention provides a multi-mode power factor correction circuit and power transformation equipment, so as to solve problems that the number of current sampling circuits of a conventional intersected parallel power factor correction circuit is larger and the structure of a current controller is complex. An intersected parallel structure needs to sample 2n (n is not less than two) current signals for current control, and a multi-mode power factor correction structure just needs to sample two current signals, thereby reducing the number of sampling currents, and reducing the cost of current sampling circuits. The circuit achieves the automatic balancing of currents of all bridge arms in the same circuit through a transformer, does not need to independently control the current of each bridge arm, does not need a dedicated current-sharing controller, and enables the current controller to be simpler in structure than an intersection parallel structure. The method is effective for improving the power density and power of a system.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a multi-state power factor correction circuit and power conversion equipment. Background technique [0002] Power Factor Correction (PFC, Power Factor Correction) circuits are widely used in communication power supplies and uninterrupted power supplies (UPS, Uninterrupted Power Supply). In addition to converting AC voltage to DC voltage, it also needs to correct the input power factor. Meet the requirements of various standards for input characteristics. The voltage stress of the switch tube in the three-level power factor correction circuit is half of the voltage stress of the switch tube in the two-level power factor correction circuit under the same bus voltage, and the three-level power factor correction circuit under the same power and switching frequency The inductor volume in the circuit is smaller than that in the two-level power factor correction circuit, so t...
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): H02M1/42
CPCY02B70/10
Inventor 武志贤
Owner EMERSON NETWORK POWER CO LTD