Magnetic latching device and method
A magnetic retention and magnetic core technology, applied in transformer/inductor circuits, transformer/inductor coils/windings/connections, etc., can solve problems such as no solutions, reduce material costs and labor costs, and have a wide range of applications. , the effect of increasing utilization efficiency
Inactive Publication Date: 2020-05-19
邢台子中电子科技有限公司
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Problems solved by technology
[0003] Then, in the full bridge circuit, can the utilization efficiency of the main transformer magnetic core material be further greatly improved? Aiming at this technical problem, no effective solution has been proposed so far
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[0016] To further illustrate this embodiment, the present invention provides accompanying drawings, which are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiment, and can be used in conjunction with the relevant descriptions in the manual to explain the operating principle of the embodiment, for reference From these contents, those skilled in the art should be able to understand other possible implementations and advantages of the present invention, and similar component symbols are generally used to represent similar components.
[0017] According to an embodiment of the present invention, a magnetic holding circuit is provided, which is composed of a magnetic holding winding and a control circuit.
[0018] Further, on the magnetic material of the main transformer of the full-bridge circuit, in addition to the normal winding of the primary and secondary coils of the transformer, an independent winding is added, which can be sin...
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The invention discloses a magnetic latching device and a magnetic latching method. An independent winding is additionally arranged on a magnetic material of a main transformer. The two ends of the winding are connected with an MOS transistor after passing through a full-bridge rectification circuit. On-off of the MOS transistor is controlled in the control circuit according to the following mode:when diagonal bridge arm switch tubes of the full-bridge circuit are switched on, the MOS transistor is kept in an off state, and no current flows through the independent winding; and the MOS transistor is switched on the moment the diagonal bridge arm switch tubes of the full-bridge circuit are switched off, so that when no current flows through a primary coil of the magnetic core, the MOS transistor is kept in an on state, and the current flows through the independent winding. In a conventional full-bridge circuit, the magnetic flux density variation of the magnetic core is delta B=Bm+Br ineach half work period. In the full-bridge circuit having a magnetic latching function, the amount of change in the magnetic flux density of the magnetic core is delta B=2Bm. The method can greatly improve the utilization efficiency of the magnetic material of the main transformer.
Description
technical field [0001] The invention relates to the field of power electronics. Specifically, it relates to a magnetic holding device and method in a circuit using a magnetic material as a transformer in various switching power supplies or devices using power electronics technology for power transmission or conversion. Background technique [0002] In various switching power supplies or devices that use power electronics technology for power transmission or conversion, a large number of magnetic materials are used as the main part of the transformer. However, how to efficiently use magnetic materials has always been a major technical problem in this field. We know that in high-power switching power supplies, full-bridge circuits are generally used instead of single-ended circuits. One of the main reasons is that the main transformer core in the full-bridge circuit is bidirectionally excited, while the main transformer core in the single-ended circuit is single-ended. For ex...
Claims
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IPC IPC(8): H01F27/28H01F27/42
CPCH01F27/28H01F27/42
Inventor 王德斌王康
Owner 邢台子中电子科技有限公司