Integrated common resonance unit multiphase parallel resonant converter capable of automatically equalizing current
A technology of resonant converter and resonant unit, which is applied in the direction of converting DC power input to DC power output, output power conversion devices, instruments, etc., and can solve the problems of large current sharing error and poor load characteristics of two-phase modules
Pending Publication Date: 2022-07-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The paper "A Passive Current Sharing Method With Common Inductor Multiphase LLC Resonant Converter" of IEEE Transactions on Power Electronics, Volume 32, Issue 9, 2017, proposed a common inductor passive current sharing method, through which the resonant inductors of the two-phase resonant converter are connected in parallel To a certain extent, the current sharing performance of the system is improved, but the parameter difference of the resonant capacitor leads to a large current sharing error of the two-phase modules. In addition, the obvious disadvantage of this method is that the resonant current of each module of the parallel resonant converter and the diode current are mutually related. pull, very poor load characteristics
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
specific Embodiment approach
[0052] As a specific embodiment of the present invention, the first switch circuit S 1 and the second switch circuit S 2 Can be a half-bridge circuit or a full-bridge circuit;
[0053] The first rectifier circuit R 1 and the second rectifier circuit R 2 It can be a half-wave rectifier circuit, a full-wave rectifier circuit, a full-bridge rectifier circuit and a voltage doubler rectifier circuit.
[0054] As a specific embodiment of the present invention, it also includes a first resonant cavity and a second resonant cavity;
[0055] The first resonant cavity consists of three or more first-phase resonant converters P l Multi-resonant network composed of series and parallel;
[0056] The second resonant cavity consists of more than 3 second-phase resonant converters P 2 A multi-resonant network composed of series and parallel.
[0057] An integrated common-resonant unit polyphase parallel resonant converter with automatic current sharing can be extended to the applicatio...
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 an integrated common resonance unit multiphase parallel resonant converter capable of automatically equalizing current. Each phase of submodule of the multi-phase parallel resonant converter is composed of a switching circuit, an integrated common resonant unit, an isolation transformer and a rectification circuit. In order to realize automatic current sharing of each phase resonant converter, the two phase modules share one integrated resonant unit. Resonance parameters equivalent to all modules of the integrated resonance unit will be the same, the problem of current sharing errors caused by resonant cavity parameter differences is eliminated, and therefore current sharing of all phase modules is automatically achieved. The switching time sequence of the switching circuit of each phase module is the same, so that the working principle and parameter design of the resonant converter cannot be influenced; the high-power parallel switching power supply can be applied to high-power parallel switching power supply occasions such as new energy power generation, electric automobiles, aerospace, uninterruptible power supplies, direct-current power distribution systems and energy storage systems, and has the advantages of reasonable method, convenience in implementation, good universality, small size, low cost and the like.
Description
technical field [0001] The invention relates to the technical field of power electronic converters, in particular to an integrated common resonance unit polyphase parallel resonance converter capable of automatic current sharing. Background technique [0002] In recent years, converters in power electronic systems are developing towards high power, integration, low cost, high power density and high efficiency. Resonant converters have the advantages of electrical isolation, easy to achieve soft switching control, high efficiency, and can realize multiple modular solutions through parallel combination, and have developed into new energy power generation, electric vehicles, aerospace, uninterruptible power supply, DC power distribution systems It is one of the core topologies of high-power parallel switching power supplies in other occasions. In the occasion of low voltage and high current, the parallel connection of multiphase resonant converters can effectively improve 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 Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33523
Inventor 孙志峰伍群芳王勤肖岚李金波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS