CN217935062U - DC24V dual supply input voltage isolation monitoring circuit - Google Patents
DC24V dual supply input voltage isolation monitoring circuit Download PDFInfo
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- CN217935062U CN217935062U CN202222759520.3U CN202222759520U CN217935062U CN 217935062 U CN217935062 U CN 217935062U CN 202222759520 U CN202222759520 U CN 202222759520U CN 217935062 U CN217935062 U CN 217935062U
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Abstract
The utility model discloses a DC24V dual-power input voltage isolation monitoring circuit, which comprises a power supply DC24V1, a power supply DC24V2, a first P-type field effect transistor module, a second P-type field effect transistor module, a switch module, a voltage monitoring module and a photoelectric coupler module; the output end of the power supply DC24V2 is connected with the first input end of the second P-type field effect transistor module; the output end of the second P-type field effect transistor module is connected with the input end of the voltage monitoring module and the first input end of the photoelectric coupler module; and the output end of the voltage monitoring module is connected with the second input end of the photoelectric coupler module. Compared with the prior art, the utility model discloses increased the mechanical structure reliability of this circuit, the fault rate that has reduced can effectively guarantee circuit safety, has improved circuit design's reliability, has improved photoelectric coupler and voltage monitor's anti voltage fluctuation ability.
Description
Technical Field
The utility model relates to a wind power generation control field specifically includes a DC24V dual supply input voltage keeps apart monitoring circuit.
Background
In the field of wind power generation control, the stability requirement of a controller is high, and due to the fact that the power output fluctuation of wind power generation is high, along with the change of seasons and the difference of regions, the power output of wind power generation in different seasons and different time periods of different regions has high fluctuation and randomness, the mode of step-by-step control, multi-path output and multi-power input is adopted for the power input of a control system of the wind power generation, and the fault time of equipment can be effectively reduced; in the control module that is provided with dual-circuit power input, there is strict requirement to the control of voltage, need the voltage of real time monitoring controller module input power, when the input voltage of controller module is less than and sets for the threshold value, or when input power voltage is not when predetermineeing the within range, need prevent to cause the damage of controller because of the voltage exceedes predetermined range, and need prevent that the controller is because of work under abnormal voltage, output improper instruction, therefore, when the external voltage appears unusually or surpasss the allowed band, require voltage monitoring module to send out warning message, timely will report an emergency and ask for help or increased vigilance information feedback to rear console, suggestion maintainer, avoid causing equipment shutdown because voltage drops to hang down excessively.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pair of DC24V dual supply input voltage keeps apart monitoring circuit provides a circuit that can output warning information under abnormal voltage environment.
In order to achieve the above object, the utility model adopts the following technical scheme: a DC24V dual-power input voltage isolation monitoring circuit comprises a power supply DC24V1, a power supply DC24V2, a first P-type field effect transistor module, a second P-type field effect transistor module, a switch module, a voltage monitoring module and a photoelectric coupler module; the output end of the power supply DC24V1 is connected with the first input end of the first P-type field effect transistor module; the output end of the first P-type field effect transistor module is connected with the input end of the voltage monitoring module and the first input end of the photoelectric coupler module; the output end of the power supply DC24V2 is connected with the first input end of the second P-type field effect transistor module; the output end of the second P-type field effect transistor module is connected with the input end of the voltage monitoring module and the first input end of the photoelectric coupler module; the output end of the voltage monitoring module is connected with the second input end of the photoelectric coupler module; the second input end of the first P-type field effect transistor module and the second input end of the second P-type field effect transistor module are respectively connected with the switch module; the power supply DC24V1 and the power supply DC24V2 are input ends of a DC24V dual-power input voltage isolation monitoring circuit; the output end of the photoelectric coupler module is the output end of the DC24V double-power-supply input voltage isolation monitoring circuit.
Further, the power supply DC24V1 includes a zener diode D1 and a self-recovery fuse F1; the anode of the voltage stabilizing diode D1 is grounded; the negative electrode of the voltage stabilizing diode D1 is connected with one end of a self-recovery fuse F1, and the other end of the self-recovery fuse F1 is the output end of a power supply DC24V 1;
the power supply DC24V2 comprises a voltage stabilizing diode D3 and a self-recovery fuse F2; the anode of the voltage-stabilizing diode D3 is grounded; the cathode of the voltage stabilizing diode D3 is connected with one end of a self-recovery fuse F2, and the other end of the self-recovery fuse F2 is the output end of a power supply DC24V 2.
Further, the switch module comprises a switch K1 with the model number of PB-12M12-SPRR-FB, a resistor R9 and an input power ground PGND; pin 1 and pin 2 of the switch K1 are connected with a PGND (ground of input power); a pin 3 of the switch K1 is connected with the other end of the resistor R9; and a pin 4 of the switch K1 is connected with the second input end of the first P-type field effect transistor module and the second input end of the second P-type field effect transistor module.
Further, the first P-type field effect transistor module comprises a resistor R1, a resistor R2, a P-type field effect transistor Q1 and a Schottky diode D2; one end of the resistor R2 is connected with the other end of the self-recovery fuse F1 and a pin 2 of the P-type field effect transistor Q1; the other end of the resistor R2 is connected with one end of the resistor R1 and a pin 1 of the P-type field effect transistor Q1; a pin 3 of the P-type field effect transistor Q1 is connected with the anode of the Schottky diode D2; the cathode of the Schottky diode D2 is connected with the output end of the second P-type field effect transistor module, one end of the resistor R9, the input ends of the controller and the voltage monitoring module and the first input end of the photoelectric coupler module; the cathode of the Schottky diode D2 is used as the output end of the first P-type field effect transistor module; a pin 2 of the P-type field effect transistor Q1 is used as a first input end of the first P-type field effect transistor module; the other end of the resistor R1 is used as a second input end of the first P-type field effect transistor module.
Further, the second P-type field effect transistor module comprises a resistor R5, a resistor R8, a P-type field effect transistor Q2 and a Schottky diode D4; one end of the resistor R5 is connected with the other end of the self-recovery fuse F2 and the pin 2 of the P-type field effect transistor Q2; the other end of the resistor R5 is connected with one end of a resistor R8 and a pin 1 of the P-type field effect transistor Q2; a pin 3 of the P-type field effect transistor Q2 is connected with the anode of a Schottky diode D4; the cathode of the Schottky diode D4 is used as a first output end of the second P-type field effect transistor module; pin 2 of P-type field effect transistor Q2 is as the first input of second P-type field effect transistor module, and the other end of resistance R8 is as the second input of second P-type field effect transistor module.
Further, the voltage monitoring module comprises a resistor R7, a resistor R10 and a voltage monitor U2 with the model number of SSP61CN1002 MR; one end of the resistor R7 is used as the input end of the voltage monitoring module; the other end of the resistor R7 is connected with one end of the resistor R10 and a pin 3 of the voltage monitor U2; the other end of the resistor R10 is grounded; pin 2 of the voltage monitor U2 is grounded; pin 1 of the voltage monitor U2 is connected to the second input terminal of the photocoupler module.
Further, the photoelectric coupler module comprises a resistor R4, a grounding resistor R6, a resistor R3 and a photoelectric coupler U1 with the model number of EL817S 1; one end of the resistor R4 is the input end of the photoelectric coupler module; the other end of the resistor R4 is connected with a pin 1 of the photoelectric coupler U1 and a grounding resistor R6; a pin 3 of the photoelectric coupler U1 is grounded; a pin 4 of the photoelectric coupler U1 is connected with one end of a resistor R3; the other end of the resistor R3 is connected with a 3.3v power supply; pin 4 of the photocoupler U1 serves as the output of the photocoupler module.
Further, one end of the self-recovery fuse F1 is connected through the power supply terminals J1 and 24 v; one end of the self-recovery fuse F2 is power-connected through the power terminals J1 and 24 v.
The beneficial effects of the utility model are that:
1. the input power supply terminal J1 is set to be a threaded spring terminal, so that the reliability of a mechanical structure of the system is effectively improved, and the vibration resistance, the impact resistance, the wire pulling resistance and the like are effectively improved;
2. the input ends of the two paths of power supplies are provided with voltage stabilizing diodes D1 and D2 of reverse connection prevention protection devices, and are arranged separately, so that when one path fails, the other path does not influence the normal work, and the failure rate of the system is effectively reduced;
the circuit 3 is provided with two self-recovery fuses F1 and F2, when the current in the circuit has transient spike or continuous heavy current, the self-recovery fuses can effectively cut off the current, the safety of the subsequent circuit is ensured, the current is not influenced by the fluctuation of the front-end heavy current, and after the surge current or the continuous heavy current is removed, the self-recovery fuse card is recovered to a normal state after the system is normally input, the normal work of the module is ensured, and the manual intervention and repair are reduced to the maximum extent;
4. the current path is provided with two P-type field effect transistors Q1 and Q2 which are respectively controlled by the manual switch K1, so that two current paths are provided for the circuit, the failure of the whole circuit caused by the failure of one switch is prevented, and the reliability of the circuit design is improved; two Schottky diodes D2 and D4 are arranged on the current path to prevent one path of current from flowing to the other path;
5. the resistor R7 and the resistor R10 are arranged to clamp voltage for the voltage monitor U2, the voltage of the voltage monitor U2 is guaranteed to be clamped within a reasonable range within the whole working voltage range, the reliability of the voltage monitor U2 can be effectively protected, and the voltage fluctuation resistance of the voltage monitor U2 is improved.
6. Be provided with resistance R4 and resistance R6, do the voltage clamp for optoelectronic coupler U1, guarantee within the whole operating voltage scope that optoelectronic coupler U1's voltage is clamped within reasonable scope, can effectual protection optoelectronic coupler U1's reliability, improve optoelectronic coupler U1 anti voltage fluctuation ability.
Drawings
Fig. 1 is a schematic circuit diagram.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.
As shown in fig. 1, a DC24V dual-power input voltage isolation monitoring circuit includes a power supply DC24V1, a power supply DC24V2, a first P-type field effect transistor module, a second P-type field effect transistor module, a switch module, a voltage monitoring module, and a photoelectric coupler module; the output end of the power supply DC24V1 is connected with the first input end of the first P-type field effect transistor module; the output end of the first P-type field effect transistor module is connected with the power supply input end of the controller, the input end of the voltage monitoring module and the first input end of the photoelectric coupler module; the output end of the power supply DC24V2 is connected with the first input end of the second P-type field effect transistor module; the output end of the second P-type field effect transistor module is connected with the input end of the voltage monitoring module and the first input end of the photoelectric coupler module; the output end of the voltage monitoring module is connected with the second input end of the photoelectric coupler module; the second input end of the first P-type field effect transistor module and the second input end of the second P-type field effect transistor module are respectively connected with the switch module; the power supply DC24V1 and the power supply DC24V2 are input ends of a DC24V dual-power input voltage isolation monitoring circuit; the output end of the photoelectric coupler module is the output end of the DC24V double-power-supply input voltage isolation monitoring circuit.
The power supply DC24V1 comprises a voltage stabilizing diode D1 and a self-recovery fuse F1; the anode of the voltage-stabilizing diode D1 is grounded; the negative electrode of the voltage stabilizing diode D1 is connected with one end of a self-recovery fuse F1, and the other end of the self-recovery fuse F1 is the output end of a power supply DC24V 1;
the power supply DC24V2 comprises a voltage stabilizing diode D3 and a self-recovery fuse F2; the anode of the voltage-stabilizing diode D3 is grounded; the cathode of the voltage stabilizing diode D3 is connected with one end of a self-recovery fuse F2, and the other end of the self-recovery fuse F2 is the output end of a power supply DC24V 2.
The switch module comprises a switch K1 with the model number of PB-12M12-SPRR-FB, a resistor R9 and an input power ground PGND; pin 1 and pin 2 of the switch K1 are connected with a PGND (ground of input power); a pin 3 of the switch K1 is connected with the other end of the resistor R9; and a pin 4 of the switch K1 is connected with the second input end of the first P-type field effect transistor module and the second input end of the second P-type field effect transistor module.
The first P-type field effect transistor module comprises a resistor R1, a resistor R2, a P-type field effect transistor Q1 and a Schottky diode D2; one end of the resistor R2 is connected with the other end of the self-recovery fuse F1 and a pin 2 of the P-type field effect transistor Q1; the other end of the resistor R2 is connected with one end of the resistor R1 and a pin 1 of the P-type field effect transistor Q1; a pin 3 of the P-type field effect transistor Q1 is connected with the anode of the Schottky diode D2; the cathode of the Schottky diode D2 is connected with the output end of the second P-type field effect transistor module, one end of the resistor R9, the power input end of the controller, the input end of the voltage monitoring module and the first input end of the photoelectric coupler module; the cathode of the Schottky diode D2 is used as the output end of the first P-type field effect transistor module; a pin 2 of the P-type field effect transistor Q1 is used as a first input end of the first P-type field effect transistor module; the other end of the resistor R1 is used as a second input end of the first P-type field effect transistor module.
The second P-type field effect transistor module comprises a resistor R5, a resistor R8, a P-type field effect transistor Q2 and a Schottky diode D4; one end of the resistor R5 is connected with the other end of the self-recovery fuse F2 and a pin 2 of the P-type field effect transistor Q2; the other end of the resistor R5 is connected with one end of a resistor R8 and a pin 1 of the P-type field effect transistor Q2; a pin 3 of the P-type field effect transistor Q2 is connected with the anode of a Schottky diode D4; the cathode of the Schottky diode D4 is used as a first output end of the second P-type field effect transistor module; pin 2 of P-type field effect transistor Q2 is as the first input of second P-type field effect transistor module, and the other end of resistance R8 is as the second input of second P-type field effect transistor module.
The voltage monitoring module comprises a resistor R7, a resistor R10 and a voltage monitor U2 with the model number of SSP61CN1002 MR; one end of the resistor R7 is used as the input end of the voltage monitoring module; the other end of the resistor R7 is connected with one end of the resistor R10 and a pin 3 of the voltage monitor U2; the other end of the resistor R10 is grounded; pin 2 of the voltage monitor U2 is grounded; and a pin 1 of the voltage monitor U2 is connected with a second input end of the photoelectric coupler module.
The photoelectric coupler module comprises a resistor R4, a grounding resistor R6, a resistor R3 and a photoelectric coupler U1 with the model number of EL817S 1; one end of the resistor R4 is the input end of the photoelectric coupler module; the other end of the resistor R4 is connected with a pin 1 of the photoelectric coupler U1 and a grounding resistor R6; a pin 3 of the photoelectric coupler U1 is grounded; a pin 4 of the photoelectric coupler U1 is connected with one end of a resistor R3; the other end of the resistor R3 is connected with a 3.3v power supply; pin 4 of the photocoupler U1 serves as the output of the photocoupler module.
One end of the self-recovery fuse F1 is connected with a power supply through a power supply terminal J1 and a 24v power supply; one end of the self-recovery fuse F2 is power-connected through the power terminals J1 and 24 v.
In one embodiment of the present invention, the first and second,
1. the types of the reverse connection prevention protection devices D1 and D3 are SMDJ36A, the reverse connection prevention protection devices are arranged on the No. 2 pin and the No. 3 pin of J1 with the input power terminal type being DB142R-5.08-4P and are close to the power terminal J1, the reverse connection prevention protection device type is D1 with the SMDJ36A and protects the first path of power supply input, and the reverse connection prevention protection device type is D3 with the SMDJ36A and protects the 2 nd path of power supply input. Be provided with 2 ways of self-resuming fuses, prevent external power supply's heavy current, protection controller module can not cause the damage because of the electric current is too big.
2. The high-current P-type field effect transistor is provided with two large-current P-type field effect transistors Q1 and Q2 which are MOSFETs, a switch responsible for two paths of power input, two Schottky diodes D2 and D4 for preventing current from flowing backwards, the cathodes of the D2 and the D4 are connected together, and the anodes of the Schottky diodes are respectively connected to the No. 3 pin of the Q1 and the No. 3 pin of the Q2.
3. A voltage monitoring module is arranged and is responsible for monitoring and collecting voltage; the photoelectric coupler module is used for completing sampling isolation of signals and transmitting the signals to a subsequent signal processing unit for processing; voltage clamp resistors R7 and R10 are provided, the resistance value of R7 is set to 90.9K Ω, and the package is set to 0805; r10 resistance was set to 10K Ω, package was set to 0805; a voltage clamping resistor R4 and a resistor R6 are arranged, the resistance value of the resistor R4 is set to 47K omega, and the packaging is set to 0805; the R6 resistance value was set to 10K Ω and the package was set to 0805. The voltage of the 3 rd pin of U2 is clamped by resistors R7 and R10, and the voltage of the 1 st pin of the photocoupler U1 is clamped by resistors R4 and R6. Pin 1 of the voltage monitor U2 is connected to pin 2 of U1.
4. The 2 nd pin of the voltage monitor U2 is connected to a power input ground PGND; and a third pin of a photoelectric coupler U1 of the photoelectric coupler module is connected to a signal power ground GND.
The utility model discloses can real time monitoring DC24V dual supply input voltage, when voltage is less than DC9V, or when being higher than DC30V, can keep apart the follow-up processing unit of input to with the control signal to power input port keeps apart each other with signal processing module, and the design is cut apart to the systematic adoption, improves the reliability of system.
The protection circuit is arranged at the input end, when the power supply voltage fluctuates abnormally, and the current exceeds the set range, the protection circuit can be effectively protected, and an indication signal can be sent out timely.
Meanwhile, a manual switch is arranged, the DC24V dual-power input voltage isolation monitoring circuit can be manually closed, the switch controls large current through a small signal, the influences of electric arcs caused by directly operating the large current, overshoot caused by transient voltage change and the like are avoided, and the stability of the circuit is effectively improved.
Claims (8)
1. A DC24V dual-power input voltage isolation monitoring circuit is characterized by comprising a power supply DC24V1, a power supply DC24V2, a first P-type field effect transistor module, a second P-type field effect transistor module, a switch module, a voltage monitoring module and a photoelectric coupler module; the output end of the power supply DC24V1 is connected with the first input end of the first P-type field effect transistor module; the output end of the first P-type field effect transistor module is connected with the power supply input end of the controller, the input end of the voltage monitoring module and the first input end of the photoelectric coupler module; the output end of the power supply DC24V2 is connected with the first input end of the second P-type field effect transistor module; the output end of the second P-type field effect transistor module is connected with the input end of the voltage monitoring module and the first input end of the photoelectric coupler module; the output end of the voltage monitoring module is connected with the second input end of the photoelectric coupler module; the second input end of the first P-type field effect transistor module and the second input end of the second P-type field effect transistor module are respectively connected with the switch module; a power supply DC24V1 and a power supply DC24V2 are input ends of a DC24V dual-power input voltage isolation monitoring circuit; the output end of the photoelectric coupler module is the output end of the DC24V double-power-supply input voltage isolation monitoring circuit.
2. The DC24V dual-power input voltage isolation monitoring circuit according to claim 1,
the power supply DC24V1 comprises a voltage stabilizing diode D1 and a self-recovery fuse F1; the anode of the voltage-stabilizing diode D1 is grounded; the negative electrode of the voltage stabilizing diode D1 is connected with one end of a self-recovery fuse F1, and the other end of the self-recovery fuse F1 is the output end of a power supply DC24V 1;
the power supply DC24V2 comprises a voltage stabilizing diode D3 and a self-recovery fuse F2; the anode of the voltage-stabilizing diode D3 is grounded; the negative electrode of the voltage stabilizing diode D3 is connected with one end of the self-recovery fuse F2, and the other end of the self-recovery fuse F2 is the output end of the power supply DC24V 2.
3. The DC24V dual-power-supply input voltage isolation monitoring circuit of claim 2, wherein the switch module comprises a switch K1 with a model number of PB-12M12-SPRR-FB, a resistor R9 and an input power ground PGND; pin 1 and pin 2 of the switch K1 are connected with an input power ground PGND; a pin 3 of the switch K1 is connected with the other end of the resistor R9; and a pin 4 of the switch K1 is connected with the second input end of the first P-type field effect transistor module and the second input end of the second P-type field effect transistor module.
4. The DC24V dual-power-supply input voltage isolation monitoring circuit according to claim 3, wherein the first P-type field effect transistor module comprises a resistor R1, a resistor R2, a P-type field effect transistor Q1 and a Schottky diode D2; one end of the resistor R2 is connected with the other end of the self-recovery fuse F1 and a pin 2 of the P-type field effect transistor Q1; the other end of the resistor R2 is connected with one end of the resistor R1 and a pin 1 of the P-type field effect transistor Q1; a pin 3 of the P-type field effect transistor Q1 is connected with the anode of the Schottky diode D2; the cathode of the Schottky diode D2 is connected with the output end of the second P-type field effect transistor module, one end of the resistor R9, the power supply input end of the controller, the input end of the voltage monitoring module and the first input end of the photoelectric coupler module; the cathode of the Schottky diode D2 is used as the output end of the first P-type field effect transistor module; a pin 2 of the P-type field effect transistor Q1 is used as a first input end of the first P-type field effect transistor module; the other end of the resistor R1 is used as a second input end of the first P-type field effect transistor module.
5. The DC24V double-power-supply input voltage isolation monitoring circuit as claimed in claim 4, wherein the second P-type field effect transistor module comprises a resistor R5, a resistor R8, a P-type field effect transistor Q2 and a Schottky diode D4; one end of the resistor R5 is connected with the other end of the self-recovery fuse F2 and the pin 2 of the P-type field effect transistor Q2; the other end of the resistor R5 is connected with one end of a resistor R8 and a pin 1 of the P-type field effect transistor Q2; a pin 3 of the P-type field effect transistor Q2 is connected with the anode of a Schottky diode D4; the cathode of the Schottky diode D4 is used as a first output end of the second P-type field effect transistor module; pin 2 of P-type field effect transistor Q2 is as the first input of second P-type field effect transistor module, and the other end of resistance R8 is as the second input of second P-type field effect transistor module.
6. The DC24V double-power-supply input voltage isolation monitoring circuit as claimed in claim 3, wherein the voltage monitoring module comprises a resistor R7, a resistor R10 and a voltage monitor U2 with model number SSP61CN1002 MR; one end of the resistor R7 is used as the input end of the voltage monitoring module; the other end of the resistor R7 is connected with one end of the resistor R10 and a pin 3 of the voltage monitor U2; the other end of the resistor R10 is grounded; pin 2 of the voltage monitor U2 is grounded; and a pin 1 of the voltage monitor U2 is connected with a second input end of the photoelectric coupler module.
7. The DC24V dual-power input voltage isolation monitoring circuit according to claim 6, wherein the photocoupler module comprises a resistor R4, a grounding resistor R6, a resistor R3 and a photocoupler U1 with model number EL817S 1; one end of the resistor R4 is the input end of the photoelectric coupler module; the other end of the resistor R4 is connected with a pin 1 of the photoelectric coupler U1 and a grounding resistor R6; a pin 3 of the photoelectric coupler U1 is grounded; a pin 4 of the photoelectric coupler U1 is connected with one end of a resistor R3; the other end of the resistor R3 is connected with a 3.3v power supply; and a pin 4 of the photoelectric coupler U1 is used as an output end of the photoelectric coupler module.
8. The isolation monitoring circuit for the input voltage of the DC24V dual power supply according to claim 2, wherein one end of a self-healing fuse F1 is connected with the first 24V power supply through a power supply terminal J1; one end of the self-recovery fuse F2 is connected with a second 24v power supply through a power supply terminal J1; the power supply terminal J1 is a threaded spring terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222759520.3U CN217935062U (en) | 2022-10-20 | 2022-10-20 | DC24V dual supply input voltage isolation monitoring circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222759520.3U CN217935062U (en) | 2022-10-20 | 2022-10-20 | DC24V dual supply input voltage isolation monitoring circuit |
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| CN217935062U true CN217935062U (en) | 2022-11-29 |
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