CN109613952A - A kind of loaded self-adaptive constant current generation circuit - Google Patents

A kind of loaded self-adaptive constant current generation circuit Download PDF

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Publication number
CN109613952A
CN109613952A CN201811598231.1A CN201811598231A CN109613952A CN 109613952 A CN109613952 A CN 109613952A CN 201811598231 A CN201811598231 A CN 201811598231A CN 109613952 A CN109613952 A CN 109613952A
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China
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module
resistance
amplifier
output
input terminal
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CN109613952B (en
Inventor
田小建
梁雪
邓军
刘大凯
高鹏彪
李尚�
马春阳
由家旭
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Changchun Changding Electronic Technology Co Ltd
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Changchun Changding Electronic Technology Co Ltd
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10Regulating voltage or current
    • G05F1/46Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/565Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G05F1/569Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
    • G05F1/573Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overcurrent detector

Abstract

A kind of loaded self-adaptive constant current generation circuit of the invention belongs to the technical field of electronic equipment, and primary structure has electric current setup module (1), clipping setup module (2), power output module (3), load judgment module (4), delay compensation module (5), voltage tracking module (6) and power failure protection module (8) etc..The present invention can actively adapt to the variation of load at work, with high-efficient, adaptive load range is wide, highly-safe, high reliability.

Description

A kind of loaded self-adaptive constant current generation circuit
Technical field
The invention belongs to the technical fields of electronic equipment.In particular to a kind of loaded self-adaptive constant current generation circuit.
Background technique
Constant-current source is in many fields such as LED drives, laser drives, sensor driving, the drivings of various glow discharge sources Inside there is important application.The basic principle of constant-current source circuit be usually utilize the nonlinear characteristic of triode or field-effect tube with And profound and negative feedbck technology, make the control for exporting current controlled voltage processed, the electricity of load is kept flow through when loading and changing It flows constant.In constant-current source circuit, the stability of electric current and the efficiency of circuit are two vital parameters.
It is that Chinese patent filed in this seminar on December 29th, 2015 is " a kind of double with the immediate prior art of the present invention Ring feeds back constant-current source circuit " (application number: 201511008766.5), which increases one on the basis of common constant-current source Feedback loop effectively increases the stability of output electric current and the reliability of circuit work.But with other prior art constant currents Source circuit is the same, which there is a problem of to adaptive load ability difference.Specifically, a constant-current source circuit can only drive one Kind of fixed load, or only allow to be supported on very a small range variation, cause to control when loading and increasing the triode of electric current into Enter to saturation region, and then maximum output current is caused to decline (can not continue to keep controllably output constant current) rapidly, and when negative Load reduction Shi Zehui makes triode enter under-voltage area, and (because load is small, the voltage of load both ends generation is also small, in the art It is referred to as under-voltage), since triode and load exist together in a series loop, and triode is nonlinear device, therefore loads electricity The reduction of pressure causes triode to automatically take on the extra voltage in circuit, and then the internal power consumption of triode is caused to steeply rise, and The internal power consumption of triode belongs to " by-product " of circuit, and to the evil of system hundred, none is sharp: the increase of one side pipe power consumption can make Tube temperature sharply increases and increases the risk (service life of lowering apparatus) that pipe is burnt out, on the other hand when the load Power supply cannot be adjusted in time causes the efficiency of entire circuit to be greatly lowered, this is when constant-current source is used for mobile device It is very unfavorable.Because when working on a mobile platform, in order to guarantee the cruise duration of system, efficiency often needs emphasis to examine The Xiang Zhibiao considered.In addition, there is no overcurrent power-off protection function in technical solution disclosed in above-mentioned patent, once current limliting module It will lead to the risk that output electric current is more than limitation electric current (generally maximum safe current) when failure, cause the damage of load or instrument It is bad.
Therefore existing constant current source technology also needs to be optimized.
Summary of the invention
The technical problem to be solved by the present invention is to it is permanent to provide a kind of loaded self-adaptive for disadvantage of the existing technology Stream generation circuit is capable of the parameter of auto-adjusting circuit itself when load impedance changes, and is become with adapting to the impedance of load Change, keeps high efficiency, and have the function of overcurrent power-off protection.
Specific technical solution of the invention is:
A kind of loaded self-adaptive constant current generation circuit, electric current setup module 1, clipping setup module 2, power output module 3; It is characterized in that, there are also load judgment modules 4, delay compensation module 5, voltage tracking module 6, overcurrent judgment module 7, disconnected for structure Electric protection module 8 and reference voltage module 9;Wherein, electric current setup module 1 is connected with clipping setup module 2, clipping setup module 2 are connected with power output module 3, and power output module 3 is connected with load judgment module 4, overcurrent judgment module 7, reference voltage Module 9 is connected with load judgment module 4, and load judgment module 4 is connected with delay compensation module 5, delay compensation module 5 and voltage Tracking module 6 is connected, and voltage tracking module 6 is connected with power output module 3, overcurrent judgment module 7 and 8 phase of power failure protection module Even, power failure protection module 8 is connected with power output module 3 and voltage tracking module 6 respectively;Power management module 10 is the city Neng Jiang Electric alternating current is converted into the circuit of DC voltage, provides Vcc, Vcc/2, Vdd tri- kinds of DC voltages for each module;
The structure of the power output module 3 are as follows: one end of the switch of relay EK1 is as power output module 3 First input terminal, is denoted as port PWR-in1, the drain electrode of another termination field-effect tube Q1, and the as power output module 3 One output end is denoted as port PWR-out1, and a termination power Vdd of the coil of relay EK1, the other end is as power output Second input terminal of module 3 is denoted as port PWR-in2, and the grid of field-effect tube Q1 is connected with the output end of amplifier U1A, source Second output end of the pole as power output module 3, is denoted as port PWR-out2, and a termination amplifier U1A's of resistance R1 is same Phase input terminal, and the third input terminal as power output module 3 are denoted as port PWR-in3, the other end conduct of resistance R1 4th input terminal of power output module 3, is denoted as port PWR-in4, is connected with the output end of clipping setup module 2, amplifier The inverting input terminal of U1A is connected with one end of one end of capacitor C1 and resistance R2, the output of the other end and amplifier U1A of capacitor C1 End is connected, the output of one end, the end of slide wire and amplifier U1B of slide rheostat W1 of the other end and slide rheostat W1 of resistance R2 End is connected, and the other end of slide rheostat W1 is connected with one end of resistance R3, and the reverse phase of the other end and amplifier U1B of resistance R3 is defeated Enter end to be connected with one end of resistance R4, the other end ground connection of resistance R4, the non-inverting input terminal and one end phase of resistance Rs of amplifier U1B Connect, and the third output end as power output module 3, is denoted as port PWR-out3, the other end ground connection of resistance Rs;
The structure of the load judgment module 4 are as follows: the non-inverting input terminal of amplifier U2A as load judgment module 4 One input terminal, is denoted as port Vjdg-in1, is connected with the port PWR-out1 of power output module 3, the reverse phase of amplifier U2A is defeated Enter end to be connected with one end of the output end of amplifier U2A and resistance R5, the other end of resistance R5 and one end of resistance R6 and amplifier U3A Non-inverting input terminal be connected, the other end of resistance R6 ground connection, the one of the output end of amplifier U3A and one end of resistance R8 and resistance R9 End be connected, the other end of resistance R8 is connected with one end of the inverting input terminal of amplifier U3A and resistance R7, the other end of resistance R7 and The inverting input terminal of amplifier U2B is connected with the output end of amplifier U2B, and the non-inverting input terminal of amplifier U2B is as load judgment module 4 Second input terminal, be denoted as port Vjdg-in2, be connected with the port PWR-out2 of power output module 3, resistance R9's is another One end is connected with the non-inverting input terminal of one end of resistance R10 and amplifier U3B, another termination power Vcc/2 of resistance R10, amplifier The output end of U3B is connected with one end of resistance R12, and the output end as load judgment module 4, is denoted as port Vjdg-out, It is connected with the input terminal of delay compensation module 5, one end phase of the other end of resistance R12 and the inverting input terminal of amplifier U3B and R11 Even, the other end of resistance R11 is connected with the inverting input terminal of the output end of amplifier U4B and amplifier U4B, and amplifier U4B's is same mutually defeated Enter end to be connected with the end of slide wire of slide rheostat W2, one end ground connection of slide rheostat W2, the other end is as load judgment module 4 Third input terminal, be denoted as port Vjdg-in3, be connected with the output end of reference voltage module 9;
The structure of the reference voltage module 9 are as follows: a termination power Vcc of resistance R44, the other end and zener diode The cathode of D4 is connected with one end of slide rheostat W7, the anode of zener diode D4 and another termination of slide rheostat W7 The end of slide wire on ground, slide rheostat W7 is connected with the non-inverting input terminal of amplifier U7B, the inverting input terminal and amplifier U7B of amplifier U7B Output end be connected, and the output end of module 9 as the reference voltage is denoted as port Vref-out, the end with load judgment module 4 Mouth Vjdg-in3 is connected;
The structure of the delay compensation module 5 are as follows: one end of resistance R13 is connected with one end of resistance R18, and as prolonging When compensating module 5 input terminal, be denoted as port Vdly-in, be connected with the port Vjdg-out of load judgment module 4, resistance R13 The other end be connected with one end of the inverting input terminal of amplifier U4A and resistance R15, the non-inverting input terminal of amplifier U4A and resistance R14 One end be connected, another termination power Vcc/2 of resistance R14, the output end and resistance of the other end of resistance R15 and amplifier U4A One end of R16 is connected, the other end of resistance R16 and one end, one end of resistance R21 and the anti-phase input of amplifier U5A of resistance R17 End is connected, and the other end of resistance R17 is connected with the output end of amplifier U5A, and the output end as delay compensation module 5, is denoted as Port Vdly-out is connected with second input terminal of voltage tracking module 6, and the non-inverting input terminal of amplifier U5A is with resistance R22's One end is connected, and the other end of resistance R22 is connected with power Vcc/2, the other end of resistance R21 and one end, the capacitor C2 of resistance R20 One end be connected with the output end of amplifier U5B, the anti-phase input of the other end of the other end of resistance R20 and capacitor C2, amplifier U5B The other end of end and resistance R18 are connected, the non-inverting input terminal of a termination amplifier U5B of resistance R19, another termination Vcc/2;
The structure of the voltage tracking module 6 is termination power Vcc/2 of resistance R23, the other end and amplifier U6A Reverse input end be connected, the non-inverting input terminal of amplifier U6A is connected with one end of one end of resistance R24, resistance R25, resistance R24 The other end be connected with the output end of amplifier U6A, the other end of resistance R25 is connected with the output end of amplifier U6B, resistance R26's One end is connected with the output end of amplifier U6A, and the other end is connected with the reverse input end of amplifier U6B;One end of resistance R27 and amplifier The noninverting input of U6B is connected, another termination power Vcc/2;One end of capacitor C3 and one end of resistance R28 are with amplifier U6B's Reverse input end is connected, and the other end is connected with the output end of amplifier U6B, one end phase of the output end and resistance R29 of amplifier U6B Even, the other end of resistance R29 is connected with the non-inverting input terminal of amplifier U7A, and first input as voltage tracking module 6 End, is denoted as port Vflw-in1, is connected with second output end of power failure protection module 8;One end of resistance R30 and amplifier U7A Noninverting input be connected, second input terminal of the other end as voltage tracking module 6 is denoted as port Vflw-in2, and prolongs When compensating module 5 port Vdly-out be connected;One end of resistance R31 is connected with the reverse input end of amplifier U7A, another termination Power Vcc/2;The output end of amplifier U7A is connected with the grid of field-effect tube Q2, and the drain electrode of field-effect tube Q2 connects power Vcc, source Pole connects one end of inductance L1 and the cathode of diode D1, the plus earth of diode D1, the other end and electrolytic capacitor of inductance L1 The anode of C4, the anode of electrolytic capacitor C5, one end of capacitor C6, one end of capacitor C7 are connected, and as voltage tracking module 6 Output end, be denoted as port Vflw-out, be connected with the port PWR-in1 of power output module 3;The cathode of electrolytic capacitor C4, The other end of the cathode of electrolytic capacitor C5, the other end of capacitor C6 and capacitor C7 is grounded;
The structure of the overcurrent judgment module 7 is that the noninverting input of amplifier U9A is as the defeated of overcurrent judgment module 7 Enter end, is denoted as port OC-in, is connected with the port PWR-out3 of power output module 3;One end of resistance R35 is with amplifier U9A's Reverse input end is connected, other end ground connection;One end of resistance R36 is connected with the reverse input end of amplifier U9A, the other end and sliding One end of rheostat W3 is connected;The other end and end of slide wire of slide rheostat W3 and the output end of amplifier U9A and amplifier U9B's is same It is connected to input terminal;A termination power Vdd of slide rheostat W4, other end ground connection, the reversed input of end of slide wire and amplifier U9B End is connected;Output end of the output end of amplifier U9B as overcurrent judgment module 7, is denoted as port OC-out, with power failure protection module 8 input terminal is connected;
The structure of the power failure protection module 8 is that two input terminals of NAND gate U8A are connected, and is denoted as port BRK-in, As the input terminal of power failure protection module 8, be connected with the output end of overcurrent judgment module 7, the output of NAND gate U8A termination with it is non- An input terminal of door U8B, the output end of another input termination NAND gate U8C of NAND gate U8B, the output of NAND gate U8B The grid of an input terminal and field-effect tube Q3 of NAND gate U8C is terminated, another input termination capacitor C8's of NAND gate U8C One end of one end and resistance R33, one end of another termination switch K1 of resistance R33 and one end of resistance R32, resistance R32's is another The other end of one termination power Vdd, switch K1 and the other end of capacitor C8 are grounded;The source electrode of field-effect tube Q3 is grounded, resistance First output end of the one end of R34 as power failure protection module 8, is denoted as port BRK-out1, and with power output module 3 Port PWR-in2 is connected, the drain electrode of another termination field-effect tube Q3 of resistance R34, and second as power failure protection module 8 Output end, is denoted as port BRK-out2, port BRK-out2 simultaneously with the port PWR-in3 of power output module 3 and voltage with The port Vflw-in1 of track module 6 is connected.
In a kind of loaded self-adaptive constant current generation circuit of the invention, the power Vcc, power Vcc/2, power supply Vdd distinguishes preferred 48V, 24V and 5V;
In a kind of loaded self-adaptive constant current generation circuit of the invention, the circuit parameter of the delay compensation module 5 It is preferred that as follows: resistance R13, R14 4K, R15 40K, R16, R21 20K, R17, R20 10K, R18, R19 1K, R22 are 5.1K, capacitor C2 are 5PF;
The utility model has the advantages that
1, the present invention is cooperated using load judgment module, delay compensation module and voltage tracking module, realizes electric current Source is to the adaptive of load impedance, so that load impedance is in wide variation, current source can safe and stable, efficiently work Make.
2, the present invention is in design (calculated) load judgment module, and using special non-destructive testing technology, neither influencing, power is defeated The output electric current of module does not influence to realize effective judgement to load variation under the premise of actual loading again out.
3, the present invention has overcurrent power-off protection function, when exporting electric current more than preset safety value, cuts off function rapidly The current supply circuit of rate output module, and the control signal of power output module and voltage tracking module is locked to 0 simultaneously, it is real Now to the multi-faceted protection of system, the safety of system is substantially increased.
4, power-off protection of the invention uses unidirectional trigger mechanism, once power-off protection is triggered, after needing debugging Hand-reset could normally export electric current, to prevent power failure protection module perseveration near safety value, further improve The safety of system.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Fig. 2 is the schematic diagram of electric current setup module 1 of the invention.
Fig. 3 is the schematic diagram of clipping setup module 2 of the invention.
Fig. 4 is the schematic diagram of power output module 3 of the invention.
Fig. 5 is the schematic diagram of load judgment module 4 of the invention.
Fig. 6 is the schematic diagram of delay compensation module 5 of the invention.
Fig. 7 is the schematic diagram of voltage tracking module 6 of the invention.
Fig. 8 is the schematic diagram of overcurrent judgment module 7 of the invention.
Fig. 9 is the schematic diagram of power failure protection module 8 of the invention.
Figure 10 is the schematic diagram of reference voltage module 9 of the invention.
Specific embodiment
The working principle of the invention is described further below by specific embodiment, parameter marked in attached drawing is The preferred parameter that each embodiment is selected, rather than the limitation of the protection scope to this patent.
The overall structure of the invention of embodiment 1
Overall structure of the invention as shown in Figure 1, electric current setup module 1, clipping setup module 2, power output module 3, Load judgment module 4, delay compensation module 5, voltage tracking module 6, overcurrent judgment module 7, power failure protection module 8, with reference to electricity Die block 9 and power management module 10;Wherein, electric current setup module 1 is connected with clipping setup module 2, clipping setup module 2 with Power output module 3 is connected, and power output module 3 is connected with load judgment module 4, overcurrent judgment module 7, reference voltage module 9 are connected with load judgment module 4, and load judgment module 4 is connected with delay compensation module 5, delay compensation module 5 and voltage-tracing Module 6 is connected, and voltage tracking module 6 is connected with power output module 3, and overcurrent judgment module 7 is connected with power failure protection module 8, Power failure protection module 8 is connected with power output module 3 and voltage tracking module 6 respectively;Power management module 10 is can be by alternating current Alternating current is converted into the circuit of DC voltage, provides Vcc, Vcc/2, Vdd tri- kinds of DC voltages for each module.
The electric current setup module of the invention of embodiment 2
Electric current setup module 1 of the invention belongs to routine techniques, can be designed according to specific requirements, can also be using this The structure that embodiment provides, as shown in Fig. 2, a termination power Vdd of resistance R37, the cathode of another termination zener diode D2 With a fixing end of slide rheostat W5, the plus earth of zener diode D2, another fixing end of slide rheostat W5 Ground connection, the end of slide wire of a termination slide rheostat W5 of resistance R38, the non-inverting input terminal of another termination amplifier U10B, amplifier One end of the anti-phase input terminating resistor R39 of U10B, the output end of another termination amplifier U10B of resistance R39, and as electric current The output end of setup module 1 is denoted as port CSet-out, is connected with the input terminal of clipping setup module 2.
It can control the output voltage of electric current setup module by changing slide rheostat W5, it is final to influence power output mould The output electric current of block 3.
The clipping setup module of the invention of embodiment 3
Clipping setup module 2 of the invention belongs to routine techniques, can be designed according to specific requirements, this reality can also be used Structure provided by example is applied, as shown in figure 3, input terminal of the one end of resistance R42 as clipping setup module 2, is denoted as port CL- In, the non-inverting input terminal of another termination amplifier U11B and the anode of diode D3, the cathode of diode D3 connect the defeated of amplifier U10A One end of outlet and resistance R41, the inverting input terminal of another termination amplifier U10A of resistance R41, the homophase input of amplifier U10A End is connected with the one end resistance R40, and the other end of resistance R40 is connected with the sliding end of slide rheostat W6, slide rheostat W6's One termination power Vdd, other end ground connection, the inverting input terminal of amplifier U11B are connected with one end of resistance R43, and resistance R43's is another One end is connected with the output end of amplifier U11B, and output end of the output end of amplifier U11B as clipping setup module 2 is denoted as port CL-out meets the port PWR-in4 of power output module 3.
The amplitude limit value (depending on the load parameter to be driven) of a safety can be set by changing slide rheostat W6, When the voltage that electric current setup module 1 exports is less than this amplitude limit value, power output module 3 is output to by clipping setup module 2 Control voltage be equal to electric current setup module 1 export voltage (not changing amplitude), and when electric current setup module 1 export voltage When greater than this amplitude limit value, the control voltage for being output to power output module 3 is limited to this amplitude limit value and is no longer arranged by electric current The control of module 1, and then the current value for exporting power output module is limited to a fixed value without being arranged by electric current Module 1 further increases.The present invention realizes the Current limited Control to output, simple and reliable for structure, power by limitation control voltage It is lost small.
The power output module of the invention of embodiment 4
The basic circuit diagram of the power output module 3 as shown in figure 4, one end of the switch of relay EK1 as function First input terminal of rate output module 3, is denoted as port PWR-in1, the drain electrode of another termination field-effect tube Q1, and as power First output end of output module 3, is denoted as port PWR-out1, a termination power Vdd of the coil of relay EK1, another Second input terminal as power output module 3 is held, is denoted as port PWR-in2, the grid of field-effect tube Q1 is with amplifier U1A's Output end is connected, and second output end of the source electrode as power output module 3 is denoted as port PWR-out2, one end of resistance R1 The non-inverting input terminal of amplifier U1A, and the third input terminal as power output module 3 are connect, port PWR-in3, resistance are denoted as Four input terminal of the other end of R1 as power output module 3, is denoted as port PWR-in4, the inverting input terminal of amplifier U1A It is connected with one end of one end of capacitor C1 and resistance R2, the other end of capacitor C1 is connected with the output end of amplifier U1A, resistance R2's The other end is connected with the output end of one end of slide rheostat W1, the end of slide wire of slide rheostat W1 and amplifier U1B, slides variable resistance The other end of device W1 is connected with one end of resistance R3, the other end of resistance R3 and the inverting input terminal of amplifier U1B and resistance R4's One end is connected, and the other end ground connection of resistance R4, the non-inverting input terminal of amplifier U1B is connected with one end of resistance Rs, and as power The third output end of output module 3 is denoted as port PWR-out3, the other end ground connection of resistance Rs.
Power output module 3 converts voltage to corresponding output under the control for the voltage that clipping setup module 2 exports Electric current is exported by the port PWR-out2 and port PWR-out3 of power output module 3 to load.
The load judgment module of the invention of embodiment 5
The schematic circuit of the load judgment module 4 is as shown in figure 5, the non-inverting input terminal of amplifier U2A is sentenced as load First input terminal of disconnected module 4, is denoted as port Vjdg-in1, is connected with the port PWR-out1 of power output module 3, amplifier The inverting input terminal of U2A is connected with one end of the output end of amplifier U2A and resistance R5, the other end of resistance R5 and the one of resistance R6 End is connected with the non-inverting input terminal of amplifier U3A, the other end ground connection of resistance R6, the output end of amplifier U3A and one end of resistance R8 It is connected with one end of resistance R9, the other end of resistance R8 is connected with one end of the inverting input terminal of amplifier U3A and resistance R7, resistance The other end of R7 is connected with the output end of the inverting input terminal of amplifier U2B and amplifier U2B, the non-inverting input terminal conduct of amplifier U2B Second input terminal of load judgment module 4, is denoted as port Vjdg-in2, the port PWR-out2 phase with power output module 3 Even, the other end of resistance R9 is connected with the non-inverting input terminal of one end of resistance R10 and amplifier U3B, another termination electricity of resistance R10 The output end of source Vcc/2, amplifier U3B are connected with one end of resistance R12, and the output end as load judgment module 4, are denoted as holding Mouthful Vjdg-out, is connected with the input terminal of delay compensation module 5, the other end of resistance R12 and the inverting input terminal of amplifier U3B and One end of R11 is connected, and the other end of resistance R11 is connected with the inverting input terminal of the output end of amplifier U4B and amplifier U4B, amplifier The non-inverting input terminal of U4B is connected with the end of slide wire of slide rheostat W2, and one end ground connection of slide rheostat W2, the other end is as negative The third input terminal for carrying judgment module 4, is denoted as port Vjdg-in3, is connected with the output end of reference voltage module 9.
When the load that the present invention is driven changes, since present invention output is constant current, load two will lead to End voltage changes, and the field-effect tube in power output module 3 itself is shared since its non-linear behavior can then adjust Voltage, therefore (i.e. power is defeated by port Vjdg-in1, Vjdg-in2 detection both ends field-effect tube Q1 for the load judgment module 4 Port PWR-out1 and PWR-out2 in module 3 out) voltage change realize to load variation judgement: load become larger when, It loads both end voltage to increase, and then the voltage at the both ends Q1 becomes smaller;When load becomes smaller, load both end voltage becomes smaller, Q1 both end voltage Then become larger.Since Q1 and load are in together in an output loop, flow through the electric current of Q1 minor change can all influence it is defeated The stability of the electric current extremely loaded out, therefore requirement cannot influence to flow through the electricity of Q1 as far as possible when detecting on Q1 both end voltage Stream, load judgment module 4 of the invention had both guaranteed that the detection to Q1 both end voltage reached using the design of high impedance non-destructive testing Very high degree of precision, and guarantee not influence to flow through the electric current of Q1 completely when detection voltage.The voltage at the both ends Q1 detected and port Reference voltage (coming from reference voltage module 9) at Vjdg-in3 is compared and asks poor, and difference determines rear class voltage-tracing The module voltage to be adjusted.
The reference voltage module of the invention of embodiment 6
The schematic circuit of the reference voltage module 9 is as shown in Figure 10, a termination power Vcc of resistance R44, the other end It is connected with one end of the cathode of zener diode D4 and slide rheostat W7, the anode and slide rheostat W7 of zener diode D4 Other end ground connection, the end of slide wire of slide rheostat W7 is connected with the non-inverting input terminal of amplifier U7B, the anti-phase input of amplifier U7B End is connected with the output end of amplifier U7B, and the output end of module 9 as the reference voltage, is denoted as port Vref-out, sentences with load The port Vjdg-in3 of disconnected module 4 is connected.
The delay compensation module of the invention of embodiment 7
Since there are delay effects for inductance, the capacitance network in the voltage tracking module 6 of rear class, in load judgment mould Block 4 detects that the final voltage tracking module 6 that changes to of load makes inevitably certain prolong is adaptively adjusted When, therefore this invention takes compensation of delay designs, eliminate the delay by delay compensation module 5, make voltage tracking module 6 Voltage adaptation adjustment is completely in the detection of load judgment module 4 to work asynchronously, to realize accurate effective control.It is described Delay compensation module 5 schematic circuit as shown in fig. 6, one end of resistance R13 is connected with one end of resistance R18, and as prolonging When compensating module 5 input terminal, be denoted as port Vdly-in, be connected with the port Vjdg-out of load judgment module 4, resistance R13 The other end be connected with one end of the inverting input terminal of amplifier U4A and resistance R15, the non-inverting input terminal of amplifier U4A and resistance R14 One end be connected, another termination power Vcc/2 of resistance R14, the output end and resistance of the other end of resistance R15 and amplifier U4A One end of R16 is connected, the other end of resistance R16 and one end, one end of resistance R21 and the anti-phase input of amplifier U5A of resistance R17 End is connected, and the other end of resistance R17 is connected with the output end of amplifier U5A, and the output end as delay compensation module 5, is denoted as Port Vdly-out is connected with second input terminal of voltage tracking module 6, and the non-inverting input terminal of amplifier U5A is with resistance R22's One end is connected, and the other end of resistance R22 is connected with power Vcc/2, the other end of resistance R21 and one end, the capacitor C2 of resistance R20 One end be connected with the output end of amplifier U5B, the anti-phase input of the other end of the other end of resistance R20 and capacitor C2, amplifier U5B The other end of end and resistance R18 are connected, the non-inverting input terminal of a termination amplifier U5B of resistance R19, another termination Vcc/2.
The voltage tracking module of the invention of embodiment 8
The schematic circuit of the voltage tracking module 6 as shown in fig. 7, resistance R23 termination power Vcc/2, it is another End is connected with the reverse input end of amplifier U6A, non-inverting input terminal and one end of resistance R24, one end of resistance R25 of amplifier U6A It is connected, the other end of resistance R24 is connected with the output end of amplifier U6A, the output end phase of the other end and amplifier U6B of resistance R25 Even, one end of resistance R26 is connected with the output end of amplifier U6A, and the other end is connected with the reverse input end of amplifier U6B;Resistance R27 One end be connected with the noninverting input of amplifier U6B, another termination power Vcc/2;One end of capacitor C3 and one end of resistance R28 It is connected with the reverse input end of amplifier U6B, the other end is connected with the output end of amplifier U6B, the output end and resistance of amplifier U6B One end of R29 is connected, and the other end of resistance R29 is connected with the non-inverting input terminal of amplifier U7A, and as voltage tracking module 6 First input terminal, is denoted as port Vflw-in1, is connected with second output end of power failure protection module 8;One end of resistance R30 It is connected with the noninverting input of amplifier U7A, second input terminal of the other end as voltage tracking module 6 is denoted as port Vflw- In2 is connected with the port Vdly-out of delay compensation module 5;One end of resistance R31 is connected with the reverse input end of amplifier U7A, Another termination power Vcc/2;The output end of amplifier U7A is connected with the grid of field-effect tube Q2, and the drain electrode of field-effect tube Q2 connects electricity Source Vcc, source electrode connect one end of inductance L1 and the cathode of diode D1, the plus earth of diode D1, the other end of inductance L1 with The anode of electrolytic capacitor C4, the anode of electrolytic capacitor C5, one end of capacitor C6, one end of capacitor C7 are connected, and as voltage The output end of tracking module 6 is denoted as port Vflw-out, is connected with the port PWR-in1 of power output module 3;Electrolytic capacitor The cathode of C4, the cathode of electrolytic capacitor C5, the other end of capacitor C6 and capacitor C7 the other end be grounded.
Voltage tracking module 6 is output to power output mould after automatically adjusting the voltage vcc that power management module 10 provides The port PWR-in1 of block 3, the power voltage of the electric current output loop as power output module 3, the voltage can follow load Variation, when load changes, so that redundancy or not will not both occur because of load reduction in the voltage PWR-in1 of port at Can be insufficient because load becomes larger, it works in always " critical state ", ensure that the maximal efficiency of whole system.
The overcurrent judgment module of the invention of embodiment 9
The schematic circuit of the overcurrent judgment module 7 is as shown in figure 8, the noninverting input of amplifier U9A is sentenced as overcurrent The input terminal of disconnected module 7, is denoted as port OC-in, is connected with the port PWR-out3 of power output module 3;One end of resistance R35 It is connected with the reverse input end of amplifier U9A, other end ground connection;One end of resistance R36 is connected with the reverse input end of amplifier U9A, The other end is connected with one end of slide rheostat W3;The other end and end of slide wire of slide rheostat W3 and the output end of amplifier U9A And the noninverting input of amplifier U9B is connected;A termination power Vdd of slide rheostat W4, other end ground connection, end of slide wire and amplifier The reverse input end of U9B is connected;Output end of the output end of amplifier U9B as overcurrent judgment module 7, is denoted as port OC-out, It is connected with the input terminal of power failure protection module 8.
The module real-time detection power output module output current value, and with the (sliding of You Tuzhong of the safety value of setting Rheostat W3 setting) it is compared, when the electric current of reality output is more than the safety value of setting, can be exported by port OC-out Over-current signal executes de-energizing actions for triggering power failure protection module 8.
The power failure protection module 8 of the invention of embodiment 10
The schematic circuit of power failure protection module 8 of the invention is as shown in figure 9, two input terminals of NAND gate U8A are connected, note It is connected as the input terminal of power failure protection module 8 with the output end of overcurrent judgment module 7 for port BRK-in, NAND gate U8A Output termination NAND gate U8B an input terminal, NAND gate U8B another input termination NAND gate U8C output end, with The grid of an input terminal and field-effect tube Q3 of the output termination NAND gate U8C of NOT gate U8B, another of NAND gate U8C are defeated Enter one end of termination capacitor C8 and one end of resistance R33, the one of one end of another termination switch K1 of resistance R33 and resistance R32 End, another termination power Vdd of resistance R32, the other end of switch K1 and the other end of capacitor C8 are grounded;Field-effect tube Q3's Source electrode ground connection, first output end of the one end of resistance R34 as power failure protection module 8 are denoted as port BRK-out1, and and function The port PWR-in2 of rate output module 3 is connected, the drain electrode of another termination field-effect tube Q3 of resistance R34, and as power-off protection Second output end of module 8 is denoted as port BRK-out2, port BRK-out2 while the port with power output module 3 PWR-in3 is connected with the port Vflw-in1 of voltage tracking module 6.
" over-current signal " of the module monitors overcurrent judgment module 7 can trigger disconnected when over-current signal is effective (high level) Electronic work, i.e. control field-effect tube Q3 conducting, port BRK-out1 are connected with the port PWR-in2 in power output module 3, will The relay EK1 triggered in power output module 3 disconnects switch, cuts off the energy source in output current loop;And port BRK-out2 is connected with the port Vflw-in1 of the port PWR-in3 of power output module 3, voltage tracking module 6 simultaneously, makes to hold Voltage is restricted to 0 simultaneously at mouth PWR-in3, port Vflw-in1, while having cut off power output module 3 and voltage-tracing mould The control voltage of block 6 further improves the validity and safety of power-off.Power failure protection module 8 also takes unidirectionally simultaneously Irreversible triggering mode, even if power-off signal disappears, will not solve at once once power-off signal occurs triggering de-energizing actions It except off-position, but needs that off-position could be released by manually actuated switch K1, to prevent trigger signal in safety value Near The Critical Point triggers repeatedly.

Claims (3)

1. a kind of loaded self-adaptive constant current generation circuit, electric current setup module (1), clipping setup module (2), power output module (3);It is characterized in that, there are also load judgment module (4), delay compensation module (5), voltage tracking module (6), overcurrents to sentence for structure Disconnected module (7), power failure protection module (8) and reference voltage module (9);Wherein, electric current setup module (1) and clipping setup module (2) it is connected, clipping setup module (2) is connected with power output module (3), power output module (3) and load judgment module (4), overcurrent judgment module (7) is connected, and reference voltage module (9) is connected with load judgment module (4), load judgment module (4) Be connected with delay compensation module (5), delay compensation module (5) is connected with voltage tracking module (6), voltage tracking module (6) with Power output module (3) is connected, and overcurrent judgment module (7) is connected with power failure protection module (8), and power failure protection module (8) is respectively It is connected with power output module (3) and voltage tracking module (6);Power management module (10) is to be converted into mains AC The circuit of DC voltage provides Vcc, Vcc/2, Vdd tri- kinds of DC voltages for each module;
The structure of the power output module (3) are as follows: one end of the switch of relay EK1 is as power output module (3) First input terminal, is denoted as port PWR-in1, the drain electrode of another termination field-effect tube Q1, and as power output module (3) First output end, is denoted as port PWR-out1, a termination power Vdd of the coil of relay EK1, and the other end is defeated as power Second input terminal of module (3) out is denoted as port PWR-in2, the output end phase of the grid and amplifier U1A of field-effect tube Q1 Even, second output end of the source electrode as power output module (3) is denoted as port PWR-out2, a termination amplifier of resistance R1 The non-inverting input terminal of U1A, and the third input terminal as power output module (3), are denoted as port PWR-in3, resistance R1's Four input terminal of the other end as power output module (3), is denoted as port PWR-in4, defeated with clipping setup module (2) Outlet be connected, the inverting input terminal of amplifier U1A is connected with one end of one end of capacitor C1 and resistance R2, the other end of capacitor C1 and The output end of amplifier U1A is connected, one end of the other end of resistance R2 and slide rheostat W1, the end of slide wire of slide rheostat W1 and The output end of amplifier U1B is connected, and the other end of slide rheostat W1 is connected with one end of resistance R3, the other end and fortune of resistance R3 The inverting input terminal for putting U1B is connected with one end of resistance R4, the other end of resistance R4 ground connection, the non-inverting input terminal of amplifier U1B with One end of resistance Rs is connected, and the third output end as power output module (3), is denoted as port PWR-out3, resistance Rs The other end ground connection;
The structure of the load judgment module (4) are as follows: the non-inverting input terminal of amplifier U2A as load judgment module (4) One input terminal, is denoted as port Vjdg-in1, is connected with the port PWR-out1 of power output module (3), the reverse phase of amplifier U2A Input terminal is connected with one end of the output end of amplifier U2A and resistance R5, the other end of resistance R5 and one end of resistance R6 and amplifier The non-inverting input terminal of U3A is connected, the other end ground connection of resistance R6, the output end of amplifier U3A and one end of resistance R8 and resistance R9 One end be connected, the other end of resistance R8 is connected with one end of the inverting input terminal of amplifier U3A and resistance R7, and resistance R7's is another End is connected with the output end of the inverting input terminal of amplifier U2B and amplifier U2B, and the non-inverting input terminal of amplifier U2B is as load judgment Second input terminal of module (4), is denoted as port Vjdg-in2, is connected with the port PWR-out2 of power output module (3), electricity The other end of resistance R9 is connected with the non-inverting input terminal of one end of resistance R10 and amplifier U3B, another termination power of resistance R10 The output end of Vcc/2, amplifier U3B are connected with one end of resistance R12, and the output end as load judgment module (4), are denoted as holding Mouth Vjdg-out, is connected with the input terminal of delay compensation module (5), the other end of resistance R12 and the inverting input terminal of amplifier U3B It is connected with one end of R11, the other end of resistance R11 is connected with the inverting input terminal of the output end of amplifier U4B and amplifier U4B, fortune The non-inverting input terminal for putting U4B is connected with the end of slide wire of slide rheostat W2, one end ground connection of slide rheostat W2, other end conduct The third input terminal of load judgment module (4), is denoted as port Vjdg-in3, is connected with the output end of reference voltage module (9);
The structure of the reference voltage module (9) are as follows: a termination power Vcc of resistance R44, the other end and zener diode D4 Cathode be connected with one end of slide rheostat W7, zener diode D4 anode and slide rheostat W7 the other end be grounded, The end of slide wire of slide rheostat W7 is connected with the non-inverting input terminal of amplifier U7B, and the inverting input terminal of amplifier U7B is with amplifier U7B's Output end is connected, and the output end of module (9) as the reference voltage, port Vref-out is denoted as, with load judgment module (4) Port Vjdg-in3 is connected;
The structure of the delay compensation module (5) are as follows: one end of resistance R13 is connected with one end of resistance R18, and as delay The input terminal of compensating module (5), is denoted as port Vdly-in, is connected with the port Vjdg-out of load judgment module (4), resistance The other end of R13 is connected with one end of the inverting input terminal of amplifier U4A and resistance R15, the non-inverting input terminal and resistance of amplifier U4A One end of R14 is connected, another termination power Vcc/2 of resistance R14, the other end of resistance R15 and the output end and electricity of amplifier U4A The one end for hindering R16 is connected, and the other end of resistance R16 and the reverse phase of one end of resistance R17, one end of resistance R21 and amplifier U5A are defeated Entering end to be connected, the other end of resistance R17 is connected with the output end of amplifier U5A, and the output end as delay compensation module (5), It is denoted as port Vdly-out, is connected with second input terminal of voltage tracking module (6), the non-inverting input terminal and electricity of amplifier U5A The one end for hindering R22 is connected, and the other end of resistance R22 is connected with power Vcc/2, the other end of resistance R21 and the one of resistance R20 It holds, one end of capacitor C2 is connected with the output end of amplifier U5B, the other end of resistance R20 and the other end, the amplifier U5B of capacitor C2 Inverting input terminal and resistance R18 the other end be connected, resistance R19 one termination amplifier U5B non-inverting input terminal, another termination Vcc/2;
The structure of the voltage tracking module (6) is that termination power Vcc/2 of resistance R23, the other end is with amplifier U6A's Reverse input end is connected, and the non-inverting input terminal of amplifier U6A is connected with one end of one end of resistance R24, resistance R25, resistance R24's The other end is connected with the output end of amplifier U6A, and the other end of resistance R25 is connected with the output end of amplifier U6B, and the one of resistance R26 End is connected with the output end of amplifier U6A, and the other end is connected with the reverse input end of amplifier U6B;One end of resistance R27 and amplifier The noninverting input of U6B is connected, another termination power Vcc/2;One end of capacitor C3 and one end of resistance R28 are with amplifier U6B's Reverse input end is connected, and the other end is connected with the output end of amplifier U6B, one end phase of the output end and resistance R29 of amplifier U6B Even, the other end of resistance R29 is connected with the non-inverting input terminal of amplifier U7A, and first input as voltage tracking module (6) End, is denoted as port Vflw-in1, is connected with second output end of power failure protection module (8);One end of resistance R30 and amplifier The noninverting input of U7A is connected, and second input terminal of the other end as voltage tracking module (6) is denoted as port Vflw-in2, It is connected with the port Vdly-out of delay compensation module (5);One end of resistance R31 is connected with the reverse input end of amplifier U7A, separately One termination power Vcc/2;The output end of amplifier U7A is connected with the grid of field-effect tube Q2, and the drain electrode of field-effect tube Q2 connects power supply Vcc, source electrode connect one end of inductance L1 and the cathode of diode D1, the plus earth of diode D1, the other end and electricity of inductance L1 Solve the anode of capacitor C4, the anode of electrolytic capacitor C5, one end of capacitor C6, capacitor C7 one end be connected, and as voltage with The output end of track module (6), is denoted as port Vflw-out, is connected with the port PWR-in1 of power output module (3);Electrolysis electricity The other end for holding the cathode of C4, the cathode of electrolytic capacitor C5, the other end of capacitor C6 and capacitor C7 is grounded;
The structure of the overcurrent judgment module (7) is that the noninverting input of amplifier U9A is as the defeated of overcurrent judgment module (7) Enter end, is denoted as port OC-in, is connected with the port PWR-out3 of power output module (3);One end of resistance R35 and amplifier U9A Reverse input end be connected, the other end ground connection;One end of resistance R36 is connected with the reverse input end of amplifier U9A, the other end and cunning One end of dynamic rheostat W3 is connected;The other end and end of slide wire of slide rheostat W3 and the output end of amplifier U9A and amplifier U9B's Noninverting input is connected;A termination power Vdd of slide rheostat W4, other end ground connection, end of slide wire are reversed defeated with amplifier U9B's Enter end to be connected;Output end of the output end of amplifier U9B as overcurrent judgment module (7), is denoted as port OC-out, with power-off protection The input terminal of module (8) is connected;
The structure of the power failure protection module (8) is that two input terminals of NAND gate U8A are connected, and are denoted as port BRK-in, is made For the input terminal of power failure protection module (8), be connected with the output end of overcurrent judgment module (7), the output of NAND gate U8A termination with An input terminal of NOT gate U8B, the output end of another input termination NAND gate U8C of NAND gate U8B, NAND gate U8B's is defeated The grid of an input terminal and field-effect tube Q3 of NAND gate U8C, another input termination capacitor C8 of NAND gate U8C are terminated out One end and resistance R33 one end, one end of another termination switch K1 of resistance R33 and one end of resistance R32, resistance R32's The other end of another termination power Vdd, switch K1 and the other end of capacitor C8 are grounded;The source electrode of field-effect tube Q3 is grounded, electricity First output end of the one end as power failure protection module (8) for hindering R34, is denoted as port BRK-out1, and with power output mould The port PWR-in2 of block (3) is connected, the drain electrode of another termination field-effect tube Q3 of resistance R34, and as power failure protection module (8) second output end is denoted as port BRK-out2, port BRK-out2 while the port with power output module (3) PWR-in3 is connected with the port Vflw-in1 of voltage tracking module (6).
2. a kind of loaded self-adaptive constant current generation circuit according to claim 1, which is characterized in that the power Vcc, Power Vcc/2, power supply Vdd are respectively 48V, 24V and 5V.
3. a kind of loaded self-adaptive constant current generation circuit according to claim 1, which is characterized in that the compensation of delay The circuit parameter of module 5 is as follows: resistance R13, R14 4K, R15 40K, R16, R21 20K, R17, R20 10K, R18, R19 is 1K, and R22 5.1K, capacitor C2 are 5pF.
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Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0956176A (en) * 1995-08-10 1997-02-25 Matsushita Electric Ind Co Ltd Inverter controller
US20100157629A1 (en) * 2008-12-18 2010-06-24 Panasonic Corporation Semiconductor laser apparatus
CN101763128A (en) * 2009-12-03 2010-06-30 深圳市大族激光科技股份有限公司 Constant current source
US20120119718A1 (en) * 2010-11-12 2012-05-17 Song Anfei Self-adaptive current-mode-control circuit for a switching regulator
CN103425170A (en) * 2012-05-22 2013-12-04 联合聚晶股份有限公司 Power supply circuit adapting to load variation
CN203368728U (en) * 2013-07-02 2013-12-25 华平信息技术股份有限公司 A sound control device
CN104300788A (en) * 2014-10-24 2015-01-21 电子科技大学 Self-adaptation voltage regulator circuit
CN104300773A (en) * 2014-10-17 2015-01-21 深圳航天科技创新研究院 Simple self-adaptation dummy-load circuit
CN105244981A (en) * 2015-11-20 2016-01-13 深圳市祝你快乐科技有限公司 Energy saving charger capable of automatic power cutoff
CN105528009A (en) * 2015-12-29 2016-04-27 吉林大学 Portable bi-directional constant current source module
CN106486963A (en) * 2016-11-25 2017-03-08 西安微电子技术研究所 A kind of star Flouride-resistani acid phesphatase self-recovering type excessively stream/short-circuit protection circuit
CN206516893U (en) * 2017-01-18 2017-09-22 波粒(北京)光电科技有限公司 A kind of constant-current source circuit for semiconductor laser
CN207676146U (en) * 2017-06-16 2018-07-31 衢州学院 A kind of intelligent socket hardware system
CN108681362A (en) * 2018-04-25 2018-10-19 东南大学 A kind of array single-photon avalanche photodiode gain-adaptive adjusting circuit

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0956176A (en) * 1995-08-10 1997-02-25 Matsushita Electric Ind Co Ltd Inverter controller
US20100157629A1 (en) * 2008-12-18 2010-06-24 Panasonic Corporation Semiconductor laser apparatus
CN101763128A (en) * 2009-12-03 2010-06-30 深圳市大族激光科技股份有限公司 Constant current source
US20120119718A1 (en) * 2010-11-12 2012-05-17 Song Anfei Self-adaptive current-mode-control circuit for a switching regulator
CN103425170A (en) * 2012-05-22 2013-12-04 联合聚晶股份有限公司 Power supply circuit adapting to load variation
CN203368728U (en) * 2013-07-02 2013-12-25 华平信息技术股份有限公司 A sound control device
CN104300773A (en) * 2014-10-17 2015-01-21 深圳航天科技创新研究院 Simple self-adaptation dummy-load circuit
CN104300788A (en) * 2014-10-24 2015-01-21 电子科技大学 Self-adaptation voltage regulator circuit
CN105244981A (en) * 2015-11-20 2016-01-13 深圳市祝你快乐科技有限公司 Energy saving charger capable of automatic power cutoff
CN105528009A (en) * 2015-12-29 2016-04-27 吉林大学 Portable bi-directional constant current source module
CN106486963A (en) * 2016-11-25 2017-03-08 西安微电子技术研究所 A kind of star Flouride-resistani acid phesphatase self-recovering type excessively stream/short-circuit protection circuit
CN206516893U (en) * 2017-01-18 2017-09-22 波粒(北京)光电科技有限公司 A kind of constant-current source circuit for semiconductor laser
CN207676146U (en) * 2017-06-16 2018-07-31 衢州学院 A kind of intelligent socket hardware system
CN108681362A (en) * 2018-04-25 2018-10-19 东南大学 A kind of array single-photon avalanche photodiode gain-adaptive adjusting circuit

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