CN202524306U - Communication power supply module with a plurality of protection functions - Google Patents
Communication power supply module with a plurality of protection functions Download PDFInfo
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- CN202524306U CN202524306U CN2011205294592U CN201120529459U CN202524306U CN 202524306 U CN202524306 U CN 202524306U CN 2011205294592 U CN2011205294592 U CN 2011205294592U CN 201120529459 U CN201120529459 U CN 201120529459U CN 202524306 U CN202524306 U CN 202524306U
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Abstract
The present utility model relates to a power supply module, especially to a communication power supply module with a plurality of protection functions. The module comprises an AC filtering(1), a bridge type rectification filter circuit(2), a soft start circuit(3), a power conversion circuit(4), a secondary output rectification filter circuit(5) and a PWM control circuit(6); an AC voltage is electrically connected with an input end of the bridge type rectification filter circuit(2) after being filtered and output by the AC filtering(1), and output by the bridge type rectification filtering circuit; an output end of the bridge type rectification filter circuit (2) is electrically connected with the power conversion circuit(4) through the soft start circuit(3), an controlled end of the power conversion circuit(4) is electrically connected with a control end of the PWM control circuit(6), an input end of the PWM control circuit(6) is electrically connected with an output end of the secondary output rectification filter circuit(5) and an input over-voltage and under-voltage protection circuit(12) is arranged between the input end of the bridge type rectification filter circuit(2) and the PWM control circuit(6).
Description
Technical field
The utility model relates to a kind of power module, relates in particular to a kind of power supply module for communication with kinds of protect function.
Background technology
Along with the develop rapidly of science and technology, the communications industry and people's relation is close day by day, in people's routine work, life, is bringing into play more and more important effect.Any communication equipment all be unable to do without reliable and stable power supply as electric power system, and Switching Power Supply is because of having that voltage stabilized range is wide, volume is little, efficient is high, outstanding advantage such as flexibly easy to use, in communication equipment, is widely used gradually.
Many new and high technologies of while are like power supply development of technologies such as HF switch technology, soft switch technique, power factor correction technology, synchronous rectification, intellectualized technology, surface mounting technologys.Switch power technology is also in innovation constantly, and this also is widely used in the development space that provides bigger in the communication equipment for Switching Power Supply.Because the control circuit more complicated of Switching Power Supply, the ability of the anti-electricity of transistor and integrated device, thermal shock is relatively poor relatively.And situations such as Switching Power Supply also receives the interference of various extraneous factors through regular meeting when work, thereby produce voltage fluctuation, causes, under voltage certainly will cause the output of power supply unstable like this.If the communication equipment long-term work in this environment, can receive the damage of very big degree, will bring very big inconvenience to the user.
The utility model content
The purpose of the utility model provides a kind of power supply module for communication with kinds of protect function that multiple extraneous factor is disturbed of resisting.
The purpose of the utility model is to realize like this; Have the power supply module for communication of kinds of protect function, comprising: ac filter 1, bridge rectifier filter circuit 2, soft starting circuit 3, power conversion circuit 4, secondary output rectifier and filter 5, pwm control circuit 6; Pwm control circuit 6 is made up of drive circuit 601, sample circuit 602, comparison amplifying circuit 603, pulse-width modulation circuit 604, reference circuit 605; Alternating voltage is exported with the input of bridge rectifier filter circuit 2 after ac filter 1 carries out filtering and is electrically connected; Export through bridge rectifier filtering; The output of bridge rectifier filter circuit 2 is electrically connected with power conversion circuit 4 behind soft starting circuit 3; The controlled end of power conversion circuit 4 is electrically connected with the control end of pwm control circuit 6; Pwm control circuit 6 inputs are electrically connected with secondary output rectifier and filter 5 outputs; Sample circuit 602 by pwm control circuit 6 detects output voltage fluctuation signal or output current fluctuation signal; Output voltage fluctuation signal or output current fluctuation signal are input to the input of comparison amplifying circuit 603 with the reference signal of reference circuit 605, are electrically connected with the control end of pulse-width modulation circuit 604 by the output of amplifying circuit 603 relatively, control the pulsewidth of pulse-width modulation circuit 604; The pulse width variations signal amplifies fluctuation of power controlling translation circuit 4 burning voltages or current fluctuation through drive circuit 601, and input overvoltage, under voltage protection circuit 12 are arranged between the input of bridge rectifier filter circuit 2 and the pwm control circuit 6.
Secondary output rectifier and filter 5 comprises fly-wheel diode, energy storage inductor and filter capacitor composition.
Soft start protective circuit 3 is made up of current-limiting resistance R16 and capacitor C3; The tie point of current-limiting resistance R16 and capacitor C3 and first input winding L 1 of power conversion circuit and connecting of the second input winding L 2; The current-limiting resistance R16 other end is electrically connected with the output of bridge rectifier filter circuit, and capacitor C3 is electrically connected with power supply negative terminal; When power connection moment, soft start protective circuit 3 is started working, and input voltage charges to capacitor C3 through rectifier bridge U and current-limiting resistance R16; Because during start, the voltage of C3 is zero, therefore; Cisco unity malfunction during the inverter start, the surge current that has produced when just having limited start; When capacitor C3 was charged to about 80% rated voltage, the inverter operate as normal produced the triggering signal of thyristor V1 through the auxiliary winding of main transformer, makes thyristor conducting and short circuit current limitation resistance R 16, and Switching Power Supply is in normal operating condition.
Input overvoltage, the input of under voltage protection circuit 12 and the input of ac filter 1 output or bridge rectifier filter circuit 2; Sampling voltage is divided into two-way; One the tunnel through R1, R2 dividing potential drop; The tie point of R1 and R2 is through capacitor C 1 over the ground after the filtering, is input to in-phase end 3 pin of first comparator after through R3, R4 dividing potential drop; Another road is through R7, R8 dividing potential drop; The tie point of R7 and R8 is through capacitor C 2 over the ground after the filtering; Be input to out-phase end 6 pin of second comparator after through R9, R10 dividing potential drop, constitute bridge circuit by resistance R 5, R6, R11, R12, resistance R 5 with connect negative terminal after R11 is connected; Resistance R 6 is connected back pin reference voltage with R12; Out-phase end 2 pin of resistance R 5 and resistance R 6 another termination first comparators, in-phase end 5 pin of resistance R 11 and resistance R 12 another termination second comparators, first comparator and second comparator output terminal are electrically connected with pulse-width modulation circuit 604 inputs of pwm control circuit 6 through two diode forward conductings respectively later; Be lower than 5 pin reference voltages like sampling voltage, the 7 pin output high level of second comparator removes to control pwm control circuit 6 and turn-offs the power supply no-output; Be higher than 2 pin reference voltages like sampling voltage, the 1 pin output high level of first comparator removes to control pwm control circuit 6 makes its shutoff, the power supply no-output.
First comparator and second comparator are LM2904.
Described power conversion circuit 4 comprises contravariant transformer T, switch adjustment pipe V2; Contravariant transformer T comprises the first input winding L 1 and the second input winding L 2 and the first output winding L 3 and the second output winding L 4; One end of the second input winding L 2 is electrically connected with switch adjustment pipe V2; Switch adjustment pipe V2 is electrically connected drive circuit 601 control switchs adjustment pipe V2 conducting and shut-in time with drive circuit 601.
Switch adjustment pipe 7 is electrically connected with circuit overcurrent protection.
Circuit overcurrent protection is made up of triode V2 and divider resistance R13, R14; Resistance R 13 and R14 are serially connected between the input and ground of protection switch adjustment pipe V1; The tie point of resistance R 13 and R14 is electrically connected with triode V2 base stage; The emitter of triode V2 is electrically connected with the emitter of switch adjustment pipe V1, and the collector electrode of triode V2 is electrically connected through the collector electrode of resistance R 15 with switch adjustment pipe V1.
Switch adjustment pipe 7 is electrically connected with overheating protection circuit.
Overheating protection circuit comprises: capacitor C, resistance R r and hot thyristor TT201 are connected on after capacitor C, the resistance R r parallel connection between the positive electrode and control electrode of hot thyristor TT201; Hot thyristor TT201 positive electrode connects switch adjustment pipe base stage, and the negative electrode of hot thyristor TT201 connects switch adjustment pipe emitter.
The switch adjustment is managed 7 and is fixed on the housing 8 of band radiating groove, and high power switch adjustment pipe 7 insulate with the housing 8 of being with radiating groove about in the of 10 through heat conductive insulating pad 9 and insulating bushing.
The utility model has the advantages that: owing to adopt multiple safety protective circuit can effectively protect the operate as normal of power supply self and load; Has higher functional reliability; Can reduce the power consumption equipment maintenance cost, further reduce the overall cost of operation of communication system.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is elaborated:
Fig. 1 is the main circuit structure block diagram of the utility model power supply;
Fig. 2 is the circuit theory diagrams of Fig. 1;
Fig. 3 is the schematic diagram of input overvoltage, under voltage protection circuit;
Fig. 4 is the schematic diagram of input circuit overcurrent protection;
Fig. 5 is the schematic diagram of overheating protection circuit;
Fig. 6 is a high power switch adjustment pipe radiator structure sketch map vertical view;
Fig. 7 is a high power switch adjustment pipe radiator structure sketch map front view.
Among the figure, 1, ac filter; 2, bridge rectifier filter circuit; 3, soft starting circuit; 4, power conversion circuit; 5, secondary output rectifier and filter; 6, pwm control circuit; 7, switch adjustment pipe; 8, the housing of band radiating groove; 9, heat conductive insulating pad; 10, insulating bushing; 11, screw; 12, input overvoltage, under voltage protection circuit.
Embodiment
Referring to illustrated in figures 1 and 2, have the power supply module for communication of kinds of protect function, comprising: ac filter 1, bridge rectifier filter circuit 2, soft starting circuit 3, power conversion circuit 4, secondary output rectifier and filter 5, pwm control circuit 6; Pwm control circuit 6 is made up of drive circuit 601, sample circuit 602, comparison amplifying circuit 603, pulse-width modulation circuit 604, reference circuit 605; Alternating voltage is exported with the input of bridge rectifier filter circuit 2 after ac filter 1 carries out filtering and is electrically connected; Export through bridge rectifier filtering; The output of bridge rectifier filter circuit 2 is electrically connected with power conversion circuit 4 behind soft starting circuit 3; The controlled end of power conversion circuit 4 is electrically connected with the control end of pwm control circuit 6; Pwm control circuit 6 inputs are electrically connected with secondary output rectifier and filter 5 outputs; Sample circuit 602 by pwm control circuit 6 detects output voltage fluctuation signal or output current fluctuation signal; Output voltage fluctuation signal or output current fluctuation signal are input to the input of comparison amplifying circuit 603 with the reference signal of reference circuit 605, are electrically connected with the control end of pulse-width modulation circuit 604 by the output of amplifying circuit 603 relatively, control the pulsewidth of pulse-width modulation circuit 604; The pulse width variations signal amplifies fluctuation of power controlling translation circuit 4 burning voltages or current fluctuation through drive circuit 601, and input overvoltage, under voltage protection circuit 12 are arranged between the input of bridge rectifier filter circuit 2 and the pwm control circuit 6.
Secondary output rectifier and filter 5 comprises fly-wheel diode, energy storage inductor and filter capacitor composition.
Referring to shown in Figure 2; Described power conversion circuit 4 comprises contravariant transformer T, switch adjustment pipe V2; Contravariant transformer T comprises the first input winding L 1 and the second input winding L 2 and the first output winding L 3 and the second output winding L 4; One end of the second input winding L 2 is electrically connected with switch adjustment pipe V2, and switch adjustment pipe V2 is electrically connected drive circuit 601 control switchs adjustment pipe V2 conducting and shut-in time with drive circuit 601.The circuit more complicated of Switching Power Supply generally is connected to the input filter of small inductor, big electric capacity at the input of Switching Power Supply.Starting shooting moment, filtering capacitor can flow through very big surge current, and this surge current can be the several times of normal input current.Big like this surge current can make the contact of common power switch or the contact fusing of relay, and makes the input blown fuse.In addition, surge current also can damage capacitor, makes it the lost of life, premature damage.For this reason, in this power supply, use soft start protective circuit 3.
Soft start protective circuit 3 is made up of current-limiting resistance R16 and capacitor C3; The tie point of current-limiting resistance R16 and capacitor C3 and first input winding L 1 of power conversion circuit and connecting of the second input winding L 2; The current-limiting resistance R16 other end is electrically connected with the output of bridge rectifier filter circuit, and capacitor C3 is electrically connected with power supply negative terminal; When power connection moment, soft start protective circuit 3 is started working, and input voltage charges to capacitor C3 through rectifier bridge U and current-limiting resistance R16; Because during start, the voltage of C3 is zero, therefore; Cisco unity malfunction during the inverter start, the surge current that has produced when just having limited start; When capacitor C3 is charged to about 80% rated voltage, the inverter operate as normal.Triggering signal through the auxiliary winding generation of main transformer thyristor V1 makes thyristor conducting and short circuit current limitation resistance R 16, and Switching Power Supply is in normal operating condition.Therefore, select suitable capacitor C 3, the surge current that produces in the time of just preventing to start shooting.
As shown in Figure 3; Input overvoltage, the input of under voltage protection circuit 12 and the input of ac filter 1 output or bridge rectifier filter circuit 2; Sampling voltage is divided into two-way; One the tunnel through R1, R2 dividing potential drop, and the tie point of R1 and R2 is through capacitor C 1 over the ground after the filtering, is input to in-phase end 3 pin of first comparator after through R3, R4 dividing potential drop.Another road is through R7, R8 dividing potential drop; The tie point of R7 and R8 is through capacitor C 2 over the ground after the filtering; Be input to out-phase end 6 pin of second comparator after through R9, R10 dividing potential drop, constitute bridge circuit by resistance R 5, R6, R11, R12, resistance R 5 with connect negative terminal after R11 is connected; Resistance R 6 is connected back pin reference voltage with R12; Out-phase end 2 pin of resistance R 5 and resistance R 6 another termination first comparators, in-phase end 5 pin of resistance R 11 and resistance R 12 another termination second comparators, first comparator and second comparator output terminal are electrically connected with pulse-width modulation circuit 604 inputs of pwm control circuit 6 through two diode forward conductings respectively later.Be lower than 5 pin reference voltages like sampling voltage, the 7 pin output high level of second comparator removes to control pwm control circuit 6 and turn-offs the power supply no-output.Thereby protection switch adjustment Guan Buhui damages because input voltage is too high or too low.Be higher than 2 pin reference voltages like sampling voltage, the 1 pin output high level of first comparator removes to control pwm control circuit 6 makes its shutoff, the power supply no-output.First comparator and second comparator are LM2904.
Referring to shown in Figure 4,, adopted circuit overcurrent protection for protection switch adjustment pipe 7 is not burnt when increasing at short circuit, electric current.Circuit overcurrent protection is made up of triode V2 and divider resistance R13, R14.Resistance R 13 and R14 are serially connected between the input and ground of protection switch adjustment pipe V1; The tie point of resistance R 13 and R14 is electrically connected with triode V2 base stage; The emitter of triode V2 is electrically connected with the emitter of switch adjustment pipe V1, and the collector electrode of triode V2 is electrically connected through the collector electrode of resistance R 15 with switch adjustment pipe V1.
During the circuit operate as normal, through the dividing potential drop effect of R13 and R14, make that the base potential of V2 is lower than emitter current potential, emitter junction bears reverse voltage.So V2 is in cut-off state (being equivalent to open circuit), to not influence of voltage stabilizing circuit.When output voltage is zero, the emitter of V2 is equivalent to ground connection, and then V2 is in saturation conduction state (being equivalent to short circuit), thereby makes switch adjustment pipe V1 base stage be bordering on short circuit with emitter, and is in cut-off state, the cut-out circuital current, thus reach the protection purpose.Its basic skills of circuit overcurrent protection is that when output current surpassed a certain value, switch adjustment pipe was in reverse-bias state, thereby ends the automatic shutdown circuit electric current.
Referring to shown in Figure 5; Highly integrated and the light weight small size of switching regulator in the Switching Power Supply; Power density in its unit volume is improved greatly; If therefore the components and parts of supply unit inside do not have corresponding raising to the requirement of its operating ambient temperature, circuit performance is degenerated, the components and parts premature failure.The maximum tube shell temperature that general high power switch adjustment pipe allows is 75 ℃, and simultaneous temperature is the most important factor that influences the power-supply device reliability.According to 2 ℃ of the every risings of the sub-components and parts temperature of interrelated data analytical table plain telegram; Reliability decrease 10%; When the working life during 50 ℃ of temperature rises has only 25 ℃ of temperature rises 1/6 caused damage for fear of power device is overheated, therefore in the utility model power module circuitry, is provided with overheating protection circuit.
Overheating protection circuit comprises: capacitor C, resistance R r and hot thyristor TT201 are connected on after capacitor C, the resistance R r parallel connection between the positive electrode and control electrode of hot thyristor TT201.Hot thyristor TT201 positive electrode connects switch adjustment pipe base stage, and the negative electrode of hot thyristor TT201 connects switch adjustment pipe emitter, and according to the characteristic of hot thyristor, by the conducting temperature of definite this device of Rr value, Rr is big more, and the conducting temperature is low more.When it being placed near switch adjustment pipe, or in supply unit the time, the base current of switch adjustment pipe is by the hot thyristor TT201 of n control gate type bypass, and switching tube ends, and cuts off collector current, and it is overheated to prevent.
Referring to Fig. 6 and shown in Figure 7; Because the maximum tube shell temperature that high power switch adjustment pipe 7 allows is 75 ℃; Cause damage for fear of power device is overheated; The high power switch adjustment is managed 7 and is fixed on the housing 8 of band radiating groove, and high power switch adjustment pipe 7 insulate with the housing 8 of being with radiating groove about in the of 10 through heat conductive insulating pad 9 and insulating bushing, and hold-down screw 11 adopts M3 * 20.Because housing 8 radiating surfaces of band radiating groove are big, do not influence overall volume, make high power switch adjustment pipe 7 maximum tube shell temperature be significantly less than 75 ℃.
The utility model power supply module for communication is also supported reserve lead acid accumulator function, and the reserve lead acid accumulator inserts from main circuit 28V port, when the civil power normal power supply, does not need storage battery power supply.When interruption suddenly in the civil power normal power supply process or the protection of power supply overvoltage/undervoltage, can automatically switch to the lead acid accumulator power supply, guarantee the power supply operate as normal.The alarm of the high level of Input Online signal output simultaneously.
More than the described power supply module for communication with kinds of protect function of the utility model has been carried out detailed explanation.In the various conspicuous change of under the situation of spirit that does not deviate from the said technical scheme of the utility model and claim scope it being carried out all within the protection range at the utility model.
The utility model is to the requirement of communication equipment to supply module high security and high reliability, and the power supply module for communication with kinds of protect function of design.This power supply module for communication can be worked under adverse circumstances and catastrophic failure situation safely and reliably, reduces the daily running cost of common carrier.
Claims (10)
1. have the power supply module for communication of kinds of protect function, it is characterized in that: comprising: ac filter bridge rectifier filter circuit (2), soft starting circuit (3), power conversion circuit (4), secondary output rectifier and filter (5), pwm control circuit (6); Pwm control circuit (6) is made up of drive circuit (601), sample circuit (602), comparison amplifying circuit (603), pulse-width modulation circuit (604), reference circuit (605); Alternating voltage is exported after ac filter (1) carries out filtering with the input of bridge rectifier filter circuit (2) and is electrically connected; Export through bridge rectifier filtering; The output of bridge rectifier filter circuit (2) is electrically connected with power conversion circuit (4) behind soft starting circuit (3); The controlled end of power conversion circuit (4) is electrically connected with the control end of pwm control circuit (6); Pwm control circuit (6) input is electrically connected with secondary output rectifier and filter (5) output; Output voltage fluctuation signal or output current fluctuation signal are input to the input of comparison amplifying circuit (603) with the reference signal of reference circuit (605); Output by comparing amplifying circuit (603) is electrically connected with the control end of pulse-width modulation circuit (604), and input overvoltage, under voltage protection circuit (12) are arranged between the input of bridge rectifier filter circuit (2) and the pwm control circuit (6).
2. the power supply module for communication with kinds of protect function according to claim 1; It is characterized in that: described soft start protective circuit (3) comprises current-limiting resistance R16 and capacitor C3; The tie point of current-limiting resistance R16 and capacitor C3 and first input winding L 1 of power conversion circuit and connecting of the second input winding L 2; The current-limiting resistance R16 other end is electrically connected with the output of bridge rectifier filter circuit, and capacitor C3 is electrically connected with power supply negative terminal.
3. the power supply module for communication with kinds of protect function according to claim 1; It is characterized in that: the input of the input of described input overvoltage, under voltage protection circuit (12) and ac filter (1) output or bridge rectifier filter circuit (2); Sampling voltage is divided into two-way; One the tunnel through R1, R2 dividing potential drop, and the tie point of R1 and R2 is through capacitor C 1 over the ground after the filtering, is input to in-phase end 3 pin of first comparator after through R3, R4 dividing potential drop; Another road is through R7, R8 dividing potential drop; The tie point of R7 and R8 is through capacitor C 2 over the ground after the filtering; Be input to out-phase end 6 pin of second comparator after through R9, R10 dividing potential drop, constitute bridge circuit by resistance R 5, R6, R11, R12, resistance R 5 with connect negative terminal after R11 is connected; Resistance R 6 is connected back pin reference voltage with R12; Out-phase end 2 pin of resistance R 5 and resistance R 6 another termination first comparators, in-phase end 5 pin of resistance R 11 and resistance R 12 another termination second comparators, first comparator and second comparator output terminal are electrically connected with pulse-width modulation circuit (604) input of pwm control circuit (6) through two diode forward conductings respectively later.
4. the power supply module for communication with kinds of protect function according to claim 1 is characterized in that: first comparator and second comparator are LM2904.
5. the power supply module for communication with kinds of protect function according to claim 1; It is characterized in that: described power conversion circuit (4) comprises contravariant transformer T, switch adjustment pipe V2; Contravariant transformer T comprises the first input winding L 1 and the second input winding L 2 and the first output winding L 3 and the second output winding L 4; One end of the second input winding L 2 is electrically connected with switch adjustment pipe V2; Switch adjustment pipe V2 is electrically connected drive circuit (601) control switch adjustment pipe V2 conducting and shut-in time with drive circuit (601).
6. the power supply module for communication with kinds of protect function according to claim 5 is characterized in that: switch adjustment pipe is electrically connected with circuit overcurrent protection.
7. the power supply module for communication with kinds of protect function according to claim 5; It is characterized in that: circuit overcurrent protection is made up of triode V2 and divider resistance R13, R14; Resistance R 13 and R14 are serially connected between the input and ground of protection switch adjustment pipe V1; The tie point of resistance R 13 and R14 is electrically connected with triode V2 base stage; The emitter of triode V2 is electrically connected with the emitter of switch adjustment pipe V1, and the collector electrode of triode V2 is electrically connected through the collector electrode of resistance R 15 with switch adjustment pipe V1.
8. the power supply module for communication with kinds of protect function according to claim 5 is characterized in that: switch adjustment pipe (7) is electrically connected with overheating protection circuit.
9. the power supply module for communication with kinds of protect function according to claim 8; It is characterized in that: overheating protection circuit comprises: capacitor C, resistance R r and hot thyristor TT201 are connected on after capacitor C, the resistance R r parallel connection between the positive electrode and control electrode of hot thyristor TT201; Hot thyristor TT201 positive electrode connects switch adjustment pipe base stage, and the negative electrode of hot thyristor TT201 connects switch adjustment pipe emitter.
10. the power supply module for communication with kinds of protect function according to claim 5; It is characterized in that: switch is adjusted pipe and is fixed on the housing (8) of being with radiating groove, and high power switch adjustment pipe (7) insulate with the housing (8) of being with radiating groove up and down through heat conductive insulating pad (9) and insulating bushing (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205294592U CN202524306U (en) | 2011-12-17 | 2011-12-17 | Communication power supply module with a plurality of protection functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205294592U CN202524306U (en) | 2011-12-17 | 2011-12-17 | Communication power supply module with a plurality of protection functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202524306U true CN202524306U (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205294592U Expired - Lifetime CN202524306U (en) | 2011-12-17 | 2011-12-17 | Communication power supply module with a plurality of protection functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202524306U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023307A (en) * | 2012-12-28 | 2013-04-03 | 上海派芬自动控制技术有限公司 | On-off input circuit and controller |
| CN103166482A (en) * | 2011-12-17 | 2013-06-19 | 西安恒飞电子科技有限公司 | Communication power source with multiple protection functions |
| CN103532363A (en) * | 2013-10-21 | 2014-01-22 | 国家电网公司 | Filter circuit separated-type microcomputer protection switching power supply plug |
| CN114035637A (en) * | 2021-11-16 | 2022-02-11 | 中国电子科技集团公司第二十四研究所 | Starting power supply circuit, power supply method of starting power supply circuit and starting power supply device |
-
2011
- 2011-12-17 CN CN2011205294592U patent/CN202524306U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166482A (en) * | 2011-12-17 | 2013-06-19 | 西安恒飞电子科技有限公司 | Communication power source with multiple protection functions |
| CN103023307A (en) * | 2012-12-28 | 2013-04-03 | 上海派芬自动控制技术有限公司 | On-off input circuit and controller |
| CN103532363A (en) * | 2013-10-21 | 2014-01-22 | 国家电网公司 | Filter circuit separated-type microcomputer protection switching power supply plug |
| CN114035637A (en) * | 2021-11-16 | 2022-02-11 | 中国电子科技集团公司第二十四研究所 | Starting power supply circuit, power supply method of starting power supply circuit and starting power supply device |
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| GR01 | Patent grant | ||
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Granted publication date: 20121107 |
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| CX01 | Expiry of patent term |