access control system power supply
An access control system and power supply technology, applied in the direction of current collectors, electric vehicles, electrical components, etc., can solve problems such as backup battery 70 over-discharge, equipment crashes, and inability to continue working, so as to avoid electromagnetic interference, avoid over-discharge, and eliminate The effect of noise clutter
Active Publication Date: 2016-01-20
王大鹏
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Problems solved by technology
[0004] However, the transformer T241 in the voltage conversion circuit 24 includes two primary coils and one secondary coil, and the circuit of the access control system power supply 100 does not work under the condition of no load, in other words, the circuit of the access control system power supply 100 is When there is no power supply, there is no load and cannot continue to work
Moreover, there is no circuit for controlling the over-discharge of the backup battery 70 in the circuit of the access control system power supply 100, which will easily cause the equipment using the access control system power supply to crash and the backup battery 70 to be over-discharged.
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[0024] In order to better illustrate the technical means adopted by the present invention and its effects, the following detailed description is given in conjunction with the embodiments of the present invention and the accompanying drawings, wherein the same reference numerals always refer to the same components.
[0025] figure 2 A schematic diagram of the framework of the power supply of the access control system according to the embodiment of the present invention is shown.
[0026] refer to figure 2 , the access control system power supply 100 in the embodiment of the present invention includes a voltage input terminal 10 for inputting an external AC voltage; an AC-AC conversion module 20 for converting the external AC voltage provided by the external power grid into the AC voltage 12V of the access control system power supply 100; The AC-DC conversion module 30 is used to convert the AC voltage 12V into the DC voltage 12V of the access control system power supply 100 ...
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The invention discloses an access control system power supply which comprises a voltage input end, an alternating current (AC) / AC conversion module, an AC / direct current (DC) conversion module, a voltage output end and a charge-discharge control circuit. The voltage input end is used for inputting outside alternating voltage. The AC / AC conversion module is used for converting the outside alternating voltage to the alternating voltage of the access control system power supply and transporting DC voltage to the voltage output end. The voltage output end is used for supplying the DC voltage to load. The charge-discharge control circuit is connected between the AC / DC conversion module and a backup battery and used for protecting the backup battery. The access control system power supply carries out pressure regulating through adoption of a medium frequency transformer, avoids electromagnetic interference caused by high frequency, controls the backup battery through adoption of the charge-discharge control circuit, prevents the backup battery from overdischarging, and avoids dead halt of equipment with the access control system power supply.
Description
technical field [0001] The invention belongs to the field of access control systems, and in particular relates to a power supply for access control systems. Background technique [0002] In the access control system, the performance of the power supply is particularly important, and the choice of the power supply directly affects the security and stability of the access control system. Compared with other power supplies, the access control special power supply has many special requirements. Although it also provides DC 12V power supply, because it controls the electric lock, and the electric lock is composed of inductive coils, there will be an instantaneous large power supply when the electric lock is activated. At the end of the electric lock current, there will be a large reverse current, which requires the power supply to withstand frequent fluctuations in the load. At the same time, because access control belongs to radio frequency identification, the power supply is r...
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IPC IPC(8): H02M5/45H02M1/44H02J7/02H02H7/10
Inventor 王大鹏
Owner 王大鹏