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Auxiliary voltage source suitable for building safety and capable of automatically adjusting output

An automatic adjustment and auxiliary voltage technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems that affect system performance or reliability, over-triggering, under-triggering, etc.

Inactive Publication Date: 2021-05-11
NANJING COMM INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of high-power non-contact regulated power supply requires an auxiliary power supply as a trigger drive to control the continuous trigger current of the bidirectional thyristor. If a fixed voltage source is used for power supply according to conventional technology, the effective trigger current is greatly affected by temperature. , The trigger current at -40°C is about 4 times that at 85°C, so over-triggering or under-triggering is prone to occur when using a fixed voltage source for power supply, which will affect the performance or reliability of the system
[0003] CN207625446U discloses "switching power supply circuit", CN207968310U discloses "switching power supply", CN108521115A discloses "a switching power supply primary side System and method of flow control", none of the above methods has a technical idea of ​​automatically adjusting the driving power supply according to the semiconductor temperature characteristics of the device

Method used

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  • Auxiliary voltage source suitable for building safety and capable of automatically adjusting output
  • Auxiliary voltage source suitable for building safety and capable of automatically adjusting output
  • Auxiliary voltage source suitable for building safety and capable of automatically adjusting output

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Embodiment Construction

[0029] The technical solution of the present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0030] see figure 1 , the auxiliary voltage source for automatically adjusting the output of the present invention includes an input filter circuit 1, a rectification filter circuit 2, a switching transformer 3, a control and drive circuit 4, a first rectification output circuit 5, a second rectification output circuit 6, and a photocoupler 7. Amplifier circuit 8 and triode circuit 9;

[0031] The input power is sent to the input side of the switching transformer 3 through the input filter circuit 1 and the rectification filter circuit 2 in turn, and the control and drive circuit 4 adjusts the duty ratio of the pulse signal input to the switching transformer 3. The switching transformer 3 has multiple secondary windings, Wherein, one or more secondary windings are connected to the first rectification output circuit 5, and one or mor...

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Abstract

The invention discloses an auxiliary voltage source capable of automatically adjusting output and suitable for building safety. The auxiliary voltage source comprises a power input circuit, a switch transformer, a control and drive circuit, a multi-path rectification output circuit, a photoelectric coupling circuit, an amplifier circuit and a triode circuit. Based on the relation between the temperature and the amplification factor of the triode, when the temperature of the environment where the triode circuit is located changes, the amplification factor of the triode circuit is increased / decreased along with the increase / decrease of the temperature, and the control and drive circuit automatically adjusts the working duty ratio input into the switch transformer according to the output current of the photoelectric coupling circuit. The purpose of controlling the output side voltage of the switch transformer is achieved.

Description

technical field [0001] The invention belongs to the technical field of power supply control, and in particular relates to an auxiliary voltage source for automatically adjusting output suitable for building safety. Background technique [0002] In buildings where explosive gas, flammable or combustible liquid vapor is mixed with air to form an explosive gas mixture, for safety reasons, to avoid electric contact arcs igniting flammable gases and causing explosions, high-safety electrical equipment is usually used. A regulated power supply with contacts is used, while a non-contact regulated power supply is used, in which a full-cycle conduction bidirectional thyristor is used as a non-contact device. This kind of high-power non-contact regulated power supply requires an auxiliary power supply as a trigger drive to control the continuous trigger current of the bidirectional thyristor. If a fixed voltage source is used for power supply according to conventional technology, the ...

Claims

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Application Information

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IPC IPC(8): G05F1/625
CPCG05F1/625
Inventor 沈月涂金龙
Owner NANJING COMM INST OF TECH
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