CN208589920U - A kind of isolated form Wide-range voltage-stabilised power source circuit - Google Patents

A kind of isolated form Wide-range voltage-stabilised power source circuit Download PDF

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Publication number
CN208589920U
CN208589920U CN201821427045.7U CN201821427045U CN208589920U CN 208589920 U CN208589920 U CN 208589920U CN 201821427045 U CN201821427045 U CN 201821427045U CN 208589920 U CN208589920 U CN 208589920U
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triode
resistance
converter
diode
connect
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CN201821427045.7U
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Chinese (zh)
Inventor
王东
刘昊灵
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Northwest A&F University
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Northwest A&F University
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Abstract

The utility model discloses a kind of isolated form Wide-range voltage-stabilised power source circuits, including DC-DC converter and diode voltage regulator circuit;Diode voltage regulator circuit includes triode Q1, triode Q2 and triode Q3, zener diode Z1 and zener diode Z2 and resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6;One end of resistance R2 and the anode of zener diode Z1 are connect with the base stage of triode Q1, one end of resistance R3 and the collector of triode Q1 are connect with the base stage of triode Q2, one end of resistance R4 and the collector of triode Q2 are connect with the base stage of triode Q3, and the collector of triode Q3 is connect with one end of one end of resistance R5 and resistance R6.The utility model wide input voltage range, reaction speed is fast, and functional reliability is high, and low in energy consumption, the noise for the generation that works is low, and practical, using effect is good, convenient for promoting the use of.

Description

A kind of isolated form Wide-range voltage-stabilised power source circuit
Technical field
The utility model belongs to voltage-stabilized power supply circuit technical field, and in particular to a kind of isolated form Wide-range voltage-stabilised power source electricity Road.
Background technique
Power supply is the core of electronic equipment, and the quality of quality directly affects the reliability of electronic equipment, in some spies In different occasion, such as warship, steamer, train and field engineering vehicle, the power supply of instrument and meter and communication apparatus electronic equipment It is to be generated by generator, obtained after pressure stabilizing.Since generator output voltage fluctuation is big, unstable, this is just to DC voltage-stabilizing Power supply proposes particular/special requirement.Linear voltage stabilization DC power supply has some advantages: output voltage is lower than input voltage, reaction speed Fastly, the noise that work generates is low, output ripple voltage is small.But for common linear voltage-stabilizing circuit, the input voltage of adaptation Range very little is not able to satisfy special application, is based on above-mentioned special circumstances, needs to design a simple wide input voltage The voltage-stabilized power supply circuit of range.
According to the principle of zener diode: referring to that, using PN junction reverse breakdown state, electric current can become in a certain range Change and voltage the phenomenon that being basically unchanged.So input supply voltage must flow into the electric current of zener diode between entrance The minimum current in pressure stabilizing area and be unlikely to damage zener diode maximum current between, two pole of pressure stabilizing in traditional voltage regulator circuit As soon as pipe has only concatenated a current-limiting resistance, this obviously limits the range of input voltage.
Utility model content
The technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide a kind of isolation Type Wide-range voltage-stabilised power source circuit, circuit structure is simple, novel in design reasonable, realizes convenient and at low cost, input voltage model Width is enclosed, reaction speed is fast, and functional reliability is high, and low in energy consumption, the noise for the generation that works is low, and practical, using effect is good, is convenient for It promotes the use of.
In order to solve the above technical problems, the technical solution adopted in the utility model is: a kind of isolated form wide scope pressure stabilizing electricity Source circuit, including DC-DC converter and the diode voltage regulator circuit being connect with the output end of DC-DC converter;It is characterized by: The diode voltage regulator circuit includes triode Q1, triode Q2 and triode Q3, zener diode Z1 and zener diode Z2, And resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6;One end of the resistance R1 and zener diode Z1 Cathode connection, the other end of the resistance R1 be the electrode input end of diode voltage regulator circuit and with DC-DC converter just The connection of pole output end;One end of the resistance R2 and the anode of zener diode Z1 are connect with the base stage of triode Q1, described The other end of resistance R2 is the negative input of diode voltage regulator circuit and connect with the cathode output end of DC-DC converter;Institute The collector of one end and triode Q1 for stating resistance R3 is connect with the base stage of triode Q2, the other end of the resistance R3 with The cathode output end of DC-DC converter connects, the emitter ground connection of the triode Q1;One end of the resistance R4 and triode The collector of Q2 is connect with the base stage of triode Q3, the other end of the resistance R4 and the cathode output end of DC-DC converter Connection, the emitter ground connection of the triode Q2;The emitter of the triode Q3 and the cathode output end of DC-DC converter connect It connects, the collector of the triode Q3 and one end of one end of resistance R5 and resistance R6 are all connected with, the other end of the resistance R5 It is connect with the cathode output end of DC-DC converter, the other end of the resistance R6 is connect with the cathode of zener diode Z2, described The plus earth of zener diode Z2;The cathode of the zener diode Z2 is the cathode output end Vo+ of diode voltage regulator circuit, The anode of the zener diode Z2 is the cathode output end Vo- of diode voltage regulator circuit.
Above-mentioned a kind of isolated form Wide-range voltage-stabilised power source circuit, it is characterised in that: the DC-DC converter includes transformation The grid of device T1, switch mosfet pipe Q4 and switching diode D1, the switch mosfet pipe Q4 are the PWM of DC-DC converter Control signal input, the source electrode ground connection of the switch mosfet pipe Q4, one end of the primary coil of the transformer T1 is DC- The power input Vi+ of DC converter and connect with the output end of external power supply, the primary coil of the transformer T1 it is another End connects with the drain electrode of switch mosfet pipe Q4, one end of the secondary coil of the transformer T1 and the anode of switching diode D1 Connect, the cathode of the switching diode D1 is the cathode output end of DC-DC converter, and is grounded by capacitor C1, the change The other end of the secondary coil of depressor T1 is the cathode output end of DC-DC converter and ground connection.
A kind of above-mentioned isolated form Wide-range voltage-stabilised power source circuit, it is characterised in that: the triode Q1 and triode Q2 It is NPN type triode, the triode Q3 is PNP type triode.
A kind of above-mentioned isolated form Wide-range voltage-stabilised power source circuit, it is characterised in that: the model of the triode Q1 The model 2N6725 of 9014, the triode Q2, the model 9012 of the triode Q3.
A kind of above-mentioned isolated form Wide-range voltage-stabilised power source circuit, it is characterised in that: the model of the zener diode Z1 For 1N4753A.
A kind of above-mentioned isolated form Wide-range voltage-stabilised power source circuit, it is characterised in that: the model of the zener diode Z2 For 1N4742.
Compared with the prior art, the utility model has the following advantages:
1, the utility model utilizes the stabilizing voltage characteristic of zener diode, carries out to the input voltage fluctuated in a certain range steady Pressure, adjust automatically output voltage so that the voltage of output end is not fluctuated with network voltage, temperature or the variation of load, thus Achieve the purpose that stabilize the output voltage, circuit structure is simple, and novel in design reasonable, it is convenient and at low cost to realize.
2, the utility model makes circuit work exist by the switching of triode on-off and the concatenated current-limiting resistance of zener diode Two different states, greatly improve input voltage range, can change between 15V~60V.
3, the good operating stability of the utility model, functional reliability is high, is not susceptible to failure, and output voltage stabilization, Working, the noise generated is low, and output ripple voltage is small.
4, the utility model reduces resistance by the switching of triode on-off and the concatenated current-limiting resistance of zener diode Power consumption alleviates the fuel factor of resistance, further improves the stability of circuit, and reaction speed is fast, and the noise for the generation that works is low.
5, the utility model is practical, and using effect is good, convenient for promoting the use of.
In conclusion the circuit structure of the utility model is simple, novel in design rationally it is convenient and at low cost to realize, inputs Voltage range is wide, and reaction speed is fast, and functional reliability is high, and low in energy consumption, the noise for the generation that works is low, practical, using effect It is good, convenient for promoting the use of.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
As shown in Figure 1, a kind of isolated form Wide-range voltage-stabilised power source circuit of the utility model, including 1 He of DC-DC converter The diode voltage regulator circuit 2 being connect with the output end of DC-DC converter 1;The diode voltage regulator circuit 2 include triode Q1, Triode Q2 and triode Q3, zener diode Z1 and zener diode Z2 and resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6;One end of the resistance R1 is connect with the cathode of zener diode Z1, the other end of the resistance R1 For diode voltage regulator circuit 2 electrode input end and connect with the cathode output end of DC-DC converter 1;The one of the resistance R2 The anode of end and zener diode Z1 are connect with the base stage of triode Q1, and the other end of the resistance R2 is diode pressure stabilizing electricity It the negative input on road 2 and is connect with the cathode output end of DC-DC converter 1;One end of the resistance R3 and triode Q1's Collector is connect with the base stage of triode Q2, and the other end of the resistance R3 and the cathode output end of DC-DC converter 1 connect It connects, the emitter ground connection of the triode Q1;One end of the resistance R4 and the collector of triode Q2 are with triode Q3's Base stage connection, the other end of the resistance R4 are connect with the cathode output end of DC-DC converter 1, the transmitting of the triode Q2 Pole ground connection;The emitter of the triode Q3 is connect with the cathode output end of DC-DC converter 1, the current collection of the triode Q3 Pole is all connected with one end of resistance R5 and one end of resistance R6, and the other end of the resistance R5 and the anode of DC-DC converter 1 are defeated Outlet connection, the other end of the resistance R6 are connect with the cathode of zener diode Z2, and the anode of the zener diode Z2 connects Ground;The cathode of the zener diode Z2 is the cathode output end Vo+ of diode voltage regulator circuit 2, the zener diode Z2's Anode is the cathode output end Vo- of diode voltage regulator circuit 2.
In the present embodiment, the DC-DC converter 1 includes transformer T1, switch mosfet pipe Q4 and switching diode D1, The grid of the switch mosfet pipe Q4 is the pwm control signal input terminal of DC-DC converter 1, the switch mosfet pipe Q4 Source electrode ground connection, one end of the primary coil of the transformer T1 be the power input Vi+ of DC-DC converter 1 and with outside The output end of power supply connects, and the other end of the primary coil of the transformer T1 connects with the drain electrode of switch mosfet pipe Q4, institute The one end for stating the secondary coil of transformer T1 connects with the anode of switching diode D1, and the cathode of the switching diode D1 is The cathode output end of DC-DC converter 1, and be grounded by capacitor C1, the other end of the secondary coil of the transformer T1 is DC- The cathode output end of DC converter 1 and ground connection.
In the present embodiment, the triode Q1 and triode Q2 are NPN type triode, and the triode Q3 is positive-negative-positive Triode.Specifically, the model 9014 of the triode Q1, the model 2N6725 of the triode Q2, three pole The model 9012 of pipe Q3.
In the present embodiment, the model 1N4753A of the zener diode Z1.The model of the zener diode Z2 1N4742。
When the utility model is used, by the way that DC-DC converter 1 is arranged, play the role of isolation;When pwm control signal is When high level, switch mosfet pipe Q3 conducting, output is steady to diode after the voltage of external power supply output is carried out DC-DC transformation Volt circuit 2, when external power supply is unstable, when the voltage of generation is fluctuated, when the input voltage of diode voltage regulator circuit 2 is lower When, triode Q1 cut-off, triode Q2 conducting, the collector current of triode Q2 flows through resistance R4, so that the base of triode Q3 Pole has electric current to flow through, and triode Q3 conducting, electric current flows only through resistance R6 at this time;When diode voltage regulator circuit 2 input voltage compared with The voltage at Gao Shi, triode Q1 saturation conduction, triode Q1 collector and emitter both ends is less than the cut-in voltage of triode Q2, Triode Q2 cut-off, triode Q3 is also switched off, at this point, electric current is flowed through from two resistance of resistance R5 and resistance R6.Thus pass through Triode on-off have switched with the concatenated current-limiting resistance of voltage-stabiliser tube, make circuit work in two different states, adjusting flows through steady The electric current of pressure pipe, greatly improves input voltage range, and the adjustment effect of circuit is stronger;And the power consumption of resistance is reduced, subtract The light fuel factor of resistance, further improves the stability of circuit;When pwm control signal is low level, switch mosfet Pipe Q3 shutdown, DC-DC converter 1 stop working, and diode voltage regulator circuit 2 stops working.
The diode voltage regulator circuit, using the stabilizing voltage characteristic of zener diode, to the input electricity fluctuated in a certain range Pressure carry out pressure stabilizing, adjust automatically output voltage so that output end voltage not with network voltage, temperature or the variation of load and Fluctuation, to achieve the purpose that stabilize the output voltage.Zener diode flows through the big of zener diode itself electric current using adjusting The small change to meet load current, and cooperate with current-limiting resistance and convert the variation of voltage for the variation of electric current to adapt to input Voltage changes in a certain range.When input voltage is constant, the variation range of load current is exactly zener diode electric current Adjustable range;When loading constant, when input voltage fluctuation, it must assure that zener diode work anti-in input voltage minimum To breakdown conditions, in input voltage maximum, it is necessary to assure the power consumption of zener diode is no more than the maximum loss allowed.Pressure stabilizing The current range that zener diode works normally is several milliamperes to tens milliamperes.
The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all According to any simple modification to the above embodiments of the utility model technical spirit, change and equivalent structural changes, still Belong in the protection scope of technical solutions of the utility model.

Claims (6)

1. a kind of isolated form Wide-range voltage-stabilised power source circuit, the output including DC-DC converter (1) and with DC-DC converter (1) Hold the diode voltage regulator circuit (2) of connection;It is characterized by: the diode voltage regulator circuit (2) includes triode Q1, triode Q2 and triode Q3, zener diode Z1 and zener diode Z2 and resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6;One end of the resistance R1 is connect with the cathode of zener diode Z1, and the other end of the resistance R1 is two poles It the electrode input end of pipe voltage regulator circuit (2) and is connect with the cathode output end of DC-DC converter (1);One end of the resistance R2 It is connect with the base stage of triode Q1 with the anode of zener diode Z1, the other end of the resistance R2 is diode voltage regulator circuit (2) it negative input and is connect with the cathode output end of DC-DC converter (1);One end of the resistance R3 and triode Q1 Collector connect with the base stage of triode Q2, the cathode output end of the other end of the resistance R3 and DC-DC converter (1) Connection, the emitter ground connection of the triode Q1;The collector of one end of the resistance R4 and triode Q2 with triode Q3 Base stage connection, the other end of the resistance R4 connect with the cathode output end of DC-DC converter (1), the triode Q2's Emitter ground connection;The emitter of the triode Q3 is connect with the cathode output end of DC-DC converter (1), the triode Q3 Collector be all connected with one end of resistance R5 and one end of resistance R6, the other end of the resistance R5 and DC-DC converter (1) Cathode output end connection, the other end of the resistance R6 connect with the cathode of zener diode Z2, the zener diode Z2 Plus earth;The cathode of the zener diode Z2 is the cathode output end Vo+ of diode voltage regulator circuit (2), the pressure stabilizing The anode of diode Z2 is the cathode output end Vo- of diode voltage regulator circuit (2).
2. a kind of isolated form Wide-range voltage-stabilised power source circuit described in accordance with the claim 1, it is characterised in that: the DC-DC becomes Parallel operation (1) includes transformer T1, switch mosfet pipe Q4 and switching diode D1, and the grid of the switch mosfet pipe Q4 is The pwm control signal input terminal of DC-DC converter (1), the source electrode ground connection of the switch mosfet pipe Q4, the transformer T1's One end of primary coil be DC-DC converter (1) power input Vi+ and connect with the output end of external power supply, the change The other end of the primary coil of depressor T1 connects with the drain electrode of switch mosfet pipe Q4, and the one of the secondary coil of the transformer T1 End connects with the anode of switching diode D1, and the cathode of the switching diode D1 is the anode output of DC-DC converter (1) End, and be grounded by capacitor C1, the other end of the secondary coil of the transformer T1 is that the cathode of DC-DC converter (1) exports End and ground connection.
3. a kind of isolated form Wide-range voltage-stabilised power source circuit described in accordance with the claim 1, it is characterised in that: the triode Q1 It is NPN type triode with triode Q2, the triode Q3 is PNP type triode.
4. according to a kind of isolated form Wide-range voltage-stabilised power source circuit described in claim 1 or 3, it is characterised in that: three pole The model 9014 of pipe Q1, the model 2N6725 of the triode Q2, the model 9012 of the triode Q3.
5. a kind of isolated form Wide-range voltage-stabilised power source circuit described in accordance with the claim 1, it is characterised in that: two pole of pressure stabilizing The model 1N4753A of pipe Z1.
6. a kind of isolated form Wide-range voltage-stabilised power source circuit described in accordance with the claim 1, it is characterised in that: two pole of pressure stabilizing The model 1N4742 of pipe Z2.
CN201821427045.7U 2018-08-31 2018-08-31 A kind of isolated form Wide-range voltage-stabilised power source circuit Expired - Fee Related CN208589920U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111030052A (en) * 2019-12-04 2020-04-17 航天信息股份有限公司 Back electromotive force protection circuit and motor
CN113359914A (en) * 2021-01-25 2021-09-07 绍兴文理学院 Wide dynamic range embedded system power supply circuit of self-generating device
CN113866481A (en) * 2021-09-28 2021-12-31 上海电气泰雷兹交通自动化系统有限公司 Voltage acquisition circuit automatically adapting to wide voltage input range

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111030052A (en) * 2019-12-04 2020-04-17 航天信息股份有限公司 Back electromotive force protection circuit and motor
CN111030052B (en) * 2019-12-04 2022-06-17 航天信息股份有限公司 Back electromotive force protection circuit and motor
CN113359914A (en) * 2021-01-25 2021-09-07 绍兴文理学院 Wide dynamic range embedded system power supply circuit of self-generating device
CN113866481A (en) * 2021-09-28 2021-12-31 上海电气泰雷兹交通自动化系统有限公司 Voltage acquisition circuit automatically adapting to wide voltage input range

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Granted publication date: 20190308

Termination date: 20200831