CN214846338U

CN214846338U - Fire-fighting power supply equipment

Info

Publication number: CN214846338U
Application number: CN202121589395.5U
Authority: CN
Inventors: 杨树华; 杨静; 李彤彤; 康婧; 韩英
Original assignee: Hengye Century Security Technology Co ltd
Current assignee: Hengye Century Security Technology Co ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-11-23
Anticipated expiration: 2031-07-13

Abstract

A fire-fighting power supply device comprises a square wave generating circuit, a resonance circuit and a first rectifying and filtering circuit, wherein one end of the square wave generating circuit is connected with input current, the other end of the square wave generating circuit is connected with the resonance circuit, the resonance circuit is connected with the first rectifying and filtering circuit, direct current VIN is converted into square waves through the square wave generating circuit, the square wave generating circuit comprises a first N-type effect tube and a second N-type effect tube, the duty ratios of the first N-type effect tube and the second N-type effect tube are both 0.5, the control is carried out by adopting a complementary frequency modulation control mode with a fixed dead zone, after the square waves are fed into the resonance circuit, the current waveform and the voltage waveform generate phase difference, the switching loss is the product of the current flowing through a switching tube and the voltage at two ends of a source drain electrode of the switching tube, and at the moment, the first N-type effect tube and the second N-type effect tube are started when the current flows through a semiconductor diode, therefore, compared with the traditional fire-fighting power supply device, the starting voltage is lower, and the loss is smaller.

Description

Fire-fighting power supply equipment

Technical Field

The utility model relates to a fire control field, in particular to fire control power supply equipment.

Background

Along with the rapid development of urbanization, commercial building, amusement and leisure place, residential quarter are also more and more, people are also higher and higher to the demand in the aspect of safety such as fire control, in order to guarantee fire extinguishing system's stability and validity, fire extinguishing system's power also can not use conventional power supply to supply power, current fire control power supply equipment generally adopts traditional PWM converter to realize to medium power and high-power, and traditional PWM converter switching frequency is low, and is bulky, with high costs, switching loss is big, and is efficient.

Therefore, how to provide a low-loss fire-fighting power supply is an urgent problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a fire control power supply equipment, aims at solving the problem that current fire control power supply loss is high.

The fire-fighting power supply equipment comprises a square wave generating circuit, a resonance circuit and a first rectifying and filtering circuit, wherein one end of the square wave generating circuit is connected with an input current, the other end of the square wave generating circuit is connected with the resonance circuit, and the resonance circuit is connected with the first rectifying and filtering circuit.

In one embodiment, the circuit further comprises an overvoltage protection circuit, and the overvoltage protection circuit is respectively connected with the square wave generation circuit and the resonance circuit.

In one embodiment, the circuit further comprises a PWM driving circuit, and the PWM driving circuit is respectively connected to the rectifying and filtering circuit and the resonant circuit.

The application provides a fire-fighting power supply equipment, through square wave generating circuit with direct current VIN conversion to the square wave, square wave generating circuit includes first N type effect pipe and second N type effect pipe, the duty cycle of first N type effect pipe and second N type effect pipe is all 0.5, adopt the complementary frequency modulation control mode in fixed dead zone to control, after the square wave feeds into resonant circuit, current waveform and voltage waveform will produce the phase difference, the switching loss is the voltage product at the electric current that flows through the switch tube and its source drain both ends, at this moment, because first N type effect pipe and second N type effect pipe open when the electric current flows through semiconductor diode, consequently, for traditional fire-fighting power supply equipment, its turn-on voltage is lower, the loss is littleer.

Drawings

For better clarity of the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a circuit diagram of a fire-fighting power supply device provided in an embodiment of the present application;

fig. 2 is a frame structure diagram of a fire power supply apparatus according to an embodiment of the present application.

Detailed Description

The following further describes embodiments of the present application with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present application, but the present application is not limited thereto. In addition, the technical features mentioned in the embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, a circuit diagram of a fire-fighting power supply device is shown in an embodiment, and the fire-fighting power supply device comprises: the square wave generating circuit is respectively connected with an input current and the resonant circuit, the resonant circuit is connected with the rectifying and filtering circuit, the square wave generating circuit comprises a first N-type effect tube Q1 and a second N-type effect tube Q2, the resonant circuit comprises a resonant inductor Lr, a resonant capacitor Cr and an excitation inductor Lm, and the rectifying and filtering circuit comprises a first secondary rectifying diode D1, a second secondary rectifying diode D2 and an output filtering capacitor VO;

VIN is the voltage after the rectification and filtration of the alternating current voltage, the direct current VIN is converted into square waves through a first N-type effect tube Q1 and a second N-type effect tube Q2, the duty ratios of the first N-type effect tube Q1 and the second N-type effect tube Q2 are both 0.5, and the method adopts the scheme thatThe complementary frequency modulation control mode of the fixed dead zone is used for controlling, when square waves are fed into the resonant circuit, phase difference is generated between current waveform and voltage waveform, switching loss is the product of current flowing through a switching tube and voltage at two ends of a source electrode and a drain electrode of the switching tube, and at the moment, the first N-type effect tubes Q1 and Q2 are turned on when the current flows through a semiconductor diode, so that compared with traditional fire-fighting power supply equipment, the switching-on voltage is lower, and the loss is smaller; then, through a resonance circuit consisting of the resonance inductor Lr, the resonance capacitor Cr and the excitation inductor Lm, the electric field energy in the resonance capacitor Cr and the magnetic field energy in the resonance inductor Lr are mutually converted, the sum of the electric field energy and the magnetic field energy is constantly kept unchanged, a power supply does not need to convert energy back and forth with the capacitor or the inductor, and only the power supply needs to supply electric energy consumed by a resistor in the circuit, so that the energy is saved, and the cost is reduced; finally, the high-frequency signal is rectified into direct current through a first secondary rectifier diode D1 and a second secondary rectifier diode D2, alternating current components in the direct current are filtered through an output filter capacitor VO, and finally, the alternating current components are filtered through an output load R₀And (6) outputting.

In one embodiment, the power supply device further comprises a transformer, the transformer is respectively connected with the resonance circuit and the rectification filter circuit, and the transformer comprises a high-frequency transformer T and a primary N of the high-frequency transformer_PAnd secondary N of the transformer_sAnd the method is used for voltage conversion and isolation.

Referring to a frame structure diagram of a fire fighting power supply device shown in an embodiment of figure 2,

in one embodiment, the fire-fighting power supply equipment further comprises an overvoltage protection circuit, the overvoltage protection circuit is respectively connected with the square wave generation circuit and the resonance circuit, and when the alternating-current voltage exceeds a set value, the relay is controlled to be disconnected, the alternating-current input is cut off, and the effect of protecting a rear-stage circuit is achieved.

In an embodiment, the rectifying and filtering circuit further includes a first rectifying and filtering circuit, and the first rectifying and filtering circuit is respectively connected to the PWM driving circuit and the transformer, and is configured to filter and otherwise process the voltage flowing out from the PWM driving circuit.

In one embodiment, the fire-fighting power supply equipment further comprises a PWM driving circuit, and the PWM driving circuit is respectively connected with the first rectifying and filtering circuit, the resonant circuit and the control circuit and is used for monitoring the output states of the first rectifying and filtering circuit, the resonant circuit and the control circuit.

In one embodiment, the fire-fighting power supply further comprises a standby power charging circuit, and when the standby power voltage is lower than a set value, the control circuit controls the charging circuit to start to charge the standby power.

In an embodiment, the fire-fighting power supply further comprises a transformer, and the transformer is respectively connected with the first rectifying and filtering circuit and the standby charging circuit and is used for regulating the voltage output by the first rectifying and filtering circuit and the standby charging circuit.

In an embodiment, the rectifying and filtering circuit further includes a second rectifying and filtering circuit, where the second rectifying and filtering circuit is connected to the transformer, and is used to perform processing such as filtering on the transformed voltage, and is further used to feed back voltage information to the control circuit through the feedback circuit.

In one embodiment, the fire-fighting power supply equipment further comprises a control circuit, wherein the control circuit is respectively connected with the resonance circuit, the PWM driving circuit, the transformer and the second rectifying and filtering circuit and is used for controlling the operation of the circuits or devices such as the first rectifying and filtering circuit, the PWM driving circuit, the transformer and the second rectifying and filtering circuit.

In an embodiment, the fire-fighting power supply equipment further comprises a CPU control circuit, which is respectively connected to the main and standby power switching circuit, the fault output circuit, the 485 communication circuit, and the like, for controlling 485 communication, fault output, signal acquisition, voltage and current display, and the like, and is also connected to the control circuit, for processing signals of each circuit of the power supply equipment together with the control circuit.

In one embodiment, the fire-fighting power supply equipment further comprises a main and standby power switching circuit, the main and standby power switching circuit is respectively connected with the standby power input end and the CPU control circuit, when the main power is disconnected or undervoltage, the CPU control circuit controls the relay to switch the standby power to work, and when the main power is recovered, the main power is automatically switched to the main power.

In one embodiment, the fire power supply further comprises a current and voltage detection circuit, the current and voltage detection circuit is connected with the second rectifying and filtering circuit and the CPU control circuit, data are collected through the sampling resistor, and then the numerical value is displayed on the nixie tube through judgment of the CPU control circuit.

In one embodiment, the fire-fighting power supply further comprises a 485 communication circuit, the 485 communication circuit is connected with the CPU control circuit, and fault information, standby voltage, output current and other data can be transmitted to the controller through the 485 communication circuit.

In one embodiment, the fire-fighting power supply further comprises a fault output circuit, and the fault output circuit is connected with the CPU control circuit and used for outputting fault information in the power supply equipment.

In an embodiment, the fire power supply may further include a mains voltage detection circuit, the mains voltage detection circuit may be connected to the CPU control circuit, when the ac voltage is lower than 180V, the control circuit may make a judgment to prompt the main power voltage, and when the ac voltage is lower than 160V, the control circuit prompts the main power failure and switches the standby power to work.

The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the application, and the scope of the application is to be accorded the full scope of the claims.

Claims

1. The utility model provides a fire control power supply equipment, its characterized in that, includes square wave generating circuit, resonant circuit and rectification filter circuit, input current is connected to square wave generating circuit one end, and resonant circuit is connected to the other end, resonant circuit connects rectification filter circuit, and wherein, square wave generating circuit includes first N type effect pipe and second N type effect pipe, and resonant circuit includes resonance inductance, resonance capacitor and excitation inductance, and rectification filter circuit includes first secondary rectifier diode, second secondary rectifier diode and output filter capacitor.

2. A fire power supply apparatus as claimed in claim 1, further comprising an overvoltage protection circuit connected to the square wave generating circuit and the resonance circuit, respectively.

3. A fire power supply apparatus as defined in claim 1, further comprising a PWM driving circuit connected to said rectifying-smoothing circuit and said resonance circuit, respectively.

4. A fire power supply apparatus as claimed in claim 1, further comprising a control circuit connected to the resonance circuit and the PWM driving circuit, respectively.

5. A fire power supply apparatus as recited in claim 1, further comprising a backup charging circuit and a transformer, said transformer being connected to said backup charging circuit, said rectifying-filtering circuit and said control circuit, respectively.

6. A fire power supply apparatus as defined in claim 5, further comprising a current voltage detection circuit connected to said rectifying-smoothing circuit.

7. A fire power supply apparatus as defined in claim 4, further comprising a CPU control circuit, said CPU control circuit being connected to said control circuit.

8. A fire power supply apparatus as recited in claim 7, further comprising a main-standby power switching circuit, said main-standby power switching circuit being connected to said CPU control circuit.

9. A fire power supply apparatus as defined in claim 7, further comprising a failure output circuit connected to said CPU control circuit.

10. A fire power supply unit as recited in claim 7 further comprising a 485 communication circuit, said 485 communication circuit being connected to said CPU control circuit.