A constant current and constant voltage magnetic induction charging system using a special topology
A topological structure, constant current and constant voltage technology, applied in charging stations, electric vehicle charging technology, collectors, etc., can solve the problems of increasing system volume and reducing system efficiency, so as to avoid DCDC control modules, improve efficiency, and avoid The effect of instability
Active Publication Date: 2020-10-13
ZHEJIANG UNIV
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Problems solved by technology
Therefore, in order to control the output voltage or current, variable frequency control and constant frequency variable duty ratio control are generally used; variable frequency control requires the secondary side to transmit voltage and current signals to the primary side, which increases the instability of the system; fixed frequency variable duty cycle control The ratio control is usually controlled by a DCDC module after the rectifier, which increases the size of the system and reduces the system efficiency
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[0041] see Figure 1 to Figure 6 In this embodiment, the constant-current and constant-voltage magnetic induction charging system using a special topology structure includes: a full-bridge inverter, a primary side compensation network, a coil coupler, a secondary side constant current / constant voltage compensation network, and a single-phase uncontrollable rectifier Filter circuit, charging control circuit, battery load.
[0042] where the primary side compensation network includes an additional inductance L f1 , additional capacitance C f1 and compensation capacitor C p . The coil coupler includes primary coil self-inductance L p and the secondary coil self-inductance L s , the mutual inductance between coils is M. The secondary constant current / constant voltage compensation network includes: secondary compensation capacitor C s , Control the additional inductance L of output constant voltage / constant current f2 , L f3 , Secondary side additional capacitance C f2 . ...
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The invention discloses a system for realizing constant-current and constant-voltage magnetic induction charging by adopting a special topological structure, which belongs to the technical field of magnetic induction charging. The system comprises a primary compensation network and a secondary compensation network coupled by a coil coupler, a full-bridge inverter connected in parallel in the primary compensation network, and a single-phase uncontrollable rectifier filter circuit connected in parallel in the secondary compensation network. The secondary compensation network manager is equippedwith a charging control circuit and a battery load. A constant-voltage and constant-current charging effect is achieved by designing the parameter values of the components of an inductively coupled circuit. The increase in instability of the system due to the adoption of a frequency conversion control method is avoided. The increase in size and heat radiation of the system due to the adding of a DCDC control module is avoided, and the efficiency of the charging system is improved. The impedance input in the charging process is pure resistive, which avoids the input of reactive power and reduces the stress of components.
Description
technical field [0001] The invention relates to the technical field of magnetic induction charging, in particular to a magnetic induction charging system that uses a special topological structure to realize constant current and constant voltage. Background technique [0002] Electric energy is one of the most important energy sources today. The non-contact magnetic induction power transmission technology emerging in recent years has solved some disadvantages of traditional contact power supply. The non-contact magnetic induction power transfer technology uses the alternating electromagnetic field generated between the primary and secondary coils to transfer energy from the primary side to the secondary side. Through this technology, the electrical contact between electrical equipment during power transmission can be avoided, the generation of electric sparks, and the mechanical loss caused by the mutual friction of power transmission joints can be avoided, and it can be appl...
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IPC IPC(8): H02J50/10H02J7/00B60L53/12
CPCB60L53/12H02J7/0077H02J7/025H02J50/10Y02T10/70Y02T10/7072Y02T10/72Y02T90/14
Inventor 李德骏林日林鸣威张力陈亮
Owner ZHEJIANG UNIV