CN104935190A - Combined protection logic protection amplification type driving power supply for power system fault detection - Google Patents
Combined protection logic protection amplification type driving power supply for power system fault detection Download PDFInfo
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- CN104935190A CN104935190A CN201510316071.7A CN201510316071A CN104935190A CN 104935190 A CN104935190 A CN 104935190A CN 201510316071 A CN201510316071 A CN 201510316071A CN 104935190 A CN104935190 A CN 104935190A
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Abstract
The invention discloses a combined protection logic protection amplification type driving power supply for power system fault detection. The combined protection logic protection amplification type driving power supply mainly consists of a diode rectifier U, a power amplifier P1, a transformer T, a switch filtering circuit, a sliding damper, a power output circuit, a transformation feedback circuit, a power logic voltage stabilizing circuit, a logic protection amplification circuit and a combined protection circuit, wherein the power logic voltage stabilizing circuit is connected with the diode rectifier U, the switch filtering circuit and the power amplifier P1; the logic protection amplification circuit is connected between the power logic voltage stabilizing voltage and the power amplifier P1 in series; and the combined protection circuit is arranged on the diode rectifier U. The power supply of a circuit can be automatically disconnected when the running current or voltage of the circuit exceeds a preset value, the circuit is prevented from being impacted and damaged by the current or voltage, the service life of the circuit is better prolonged, and radio-frequency interference of the circuit and external radio-frequency interference are further reduced, so that the manufacturing cost and maintenance cost are significantly reduced.
Description
Technical field
The present invention relates to a kind of switching power supply, specifically refer to Power System Faults Detection combined protection type virtual protection amplifying type driving power.
Background technology
At present, along with the develop rapidly of power industry, the equipment that people are used for Power System Faults Detection also has great development.Because the maintenance of electric power system often relates to hundreds of kilovolt, the even voltage circuit of up to a million kilovolts, therefore its maintenance circuit is very long, so also very high to the power reguirements of fault test set.But, but larger ripple coefficient is there is in current people to the portable power source that fault test set provides, not only can produce radio-frequency electromagnetic interference, and its circuit structure more complicated, maintenance and cost of manufacture are higher, therefore greatly limit the scope of application of fault test set, be unfavorable for that people check on a large scale to circuit.
Summary of the invention
The object of the invention is to the defect that ripple coefficient is comparatively large, radio frequency interference is serious, circuit is complicated and efficiency is not high overcoming the existence of current fault test set power supply, Power System Faults Detection combined protection type virtual protection amplifying type driving power is provided.
Object of the present invention is achieved through the following technical solutions: Power System Faults Detection combined protection type virtual protection amplifying type driving power, primarily of diode rectifier U, power amplifier P1, transformer T, be serially connected in the switched filter circuit between the cathode output end of diode rectifier U and the electrode input end of power amplifier P1, the sliding damper be connected with the sliding tap of the primary coil L1 of transformer T, the power output circuit be connected with the secondary coil L2 of transformer T, and the transformation feedback circuit to be connected with the secondary coil L3 of transformer T forms.Simultaneously; also be provided with the logical power voltage stabilizing circuit be connected with diode rectifier U, switched filter circuit and power amplifier P1; be serially connected in the virtual protection amplifying circuit between logical power voltage stabilizing circuit and power amplifier P1, and be arranged on the composite type protective circuit on diode rectifier U.
Described virtual protection amplifying circuit is primarily of power amplifier P3, power amplifier P4, NAND gate IC5, NAND gate IC6, negative pole is connected with the electrode input end of power amplifier P3, the polar capacitor C7 that positive pole is connected with the negative input of NAND gate IC6 after resistance R12, one end is connected with the negative input of NAND gate IC5, the resistance R9 that the other end is connected with the electrode input end of power amplifier P3, be serially connected in the resistance R10 between the negative input of power amplifier P3 and output, one end is connected with the output of NAND gate IC5, the resistance R11 that the other end is connected with the negative input of power amplifier P4, be serially connected in the polar capacitor C9 between the electrode input end of power amplifier P4 and output, positive pole is connected with the output of NAND gate IC6, negative pole is in turn through electric capacity C8 that voltage stabilizing didoe D5 is connected with the output of power amplifier P3 after resistance R13, P pole is connected with the output of power amplifier P4, N pole is in turn through diode D6 that resistance R15 is connected with the tie point of resistance R13 with voltage stabilizing didoe D5 after resistance R14, and N pole is connected with the negative pole of electric capacity C8, the voltage stabilizing didoe D7 that P pole is connected with the tie point of resistance R15 with diode D6 forms, the electrode input end of described NAND gate IC5 is connected with the negative input of power amplifier P3, the electrode input end of the output NAND gate IC6 of power amplifier P4 is connected, and its electrode input end is then connected with the output of power amplifier P3.
Described logical power voltage stabilizing circuit is by power amplifier P2, NAND gate IC1, NAND gate IC2, NAND gate IC3, NAND gate IC4, N pole is connected with the output of power amplifier P2, the diode D4 of P pole ground connection after resistance R4, one end is connected with the first input end of NAND gate IC1, the resistance R5 that the other end is connected with the output of NAND gate IC2 after electric capacity C6, one end is connected with the output of NAND gate IC1, the resistance R6 that the other end is connected with the tie point of electric capacity C6 with resistance R5, one end is connected with the output of NAND gate IC3, the resistance R7 that the other end is connected with the positive pole of polar capacitor C7, one end is connected with the output of NAND gate IC4, the resistance R8 that the other end is connected with the positive pole of polar capacitor C7, and one end is connected with the negative input of power amplifier P2, the resistance R3 of other end ground connection forms, second input end grounding of described NAND gate IC1, its output is also connected with the first input end of NAND gate IC2, second input of NAND gate IC2 is connected with the electrode input end of power amplifier P2, its output is then connected with second input of NAND gate IC4 with the first input end of NAND gate IC3 respectively, and second input of NAND gate IC3 is connected with the first input end of NAND gate IC4, the electrode input end of described power amplifier P2 is then connected with the cathode output end of diode rectifier U, and meanwhile, the output of power amplifier P2 is also connected with switched filter circuit, described resistance R15 is then connected with the negative input of power amplifier P1 with the tie point of resistance R14.
Described composite type protective circuit is by incoming line, transformer T101, diode rectifier U101, voltage stabilizing integrated chip Q101, operational amplifier P101, operational amplifier P102, triode VT101, triode VT102, triode VT103, triode VT104, triode VT105, triode VT106, minus earth, the electric capacity C101 that positive pole is connected with the positive output end of diode rectifier U101, minus earth, the electric capacity C102 that positive pole is connected with the OUT pin of voltage stabilizing integrated chip Q101, one end is connected with the positive pole of electric capacity C102, the resistance R101 that the other end is connected with the negative input end of operational amplifier P101, N pole is connected with the positive pole of electric capacity C102, the diode D101 that negative pole is connected with the collector electrode of triode VT101, the relay K 101 in parallel with diode D101, one end is connected with the P pole of diode D101, the resistance R103 of other end ground connection after resistance R102, one end is connected with the base stage of triode VT101, the resistance R104 that the other end is connected with the output of operational amplifier P101, minus earth, the electric capacity C103 that positive pole is connected with the positive input terminal of operational amplifier P101, one end ground connection, the slide rheostat RP101 that the other end is connected with the positive pole of electric capacity C103, minus earth, the electric capacity C104 that positive pole is connected with the positive pole of electric capacity C102 after resistance R109, P pole is connected with the positive input terminal of operational amplifier P102, the voltage stabilizing didoe D102 that N pole is connected with the positive pole of electric capacity C104, one end is connected with the positive pole of electric capacity C102, the resistance R108 that the other end is connected with the negative input end of operational amplifier P102, one end ground connection, the resistance R107 that the other end is connected with the negative input end of operational amplifier P102, one end is connected with the output of operational amplifier P102, the resistance R106 that the other end is connected with the base stage of triode VT102, one end is connected with the N pole of diode D101, the resistance R105 that the other end is connected with the base stage of triode VT103, one end is connected with the emitter of triode VT104, the resistance R110 that the other end is connected with the collector electrode of triode VT105, and one end is connected with the base stage of triode VT104, the other end is connected with the emitter of triode VT106, the slide rheostat RP102 that sliding end is connected with the base stage of triode VT105 forms, wherein, the two ends on the former limit of transformer T101 are connected in two input lines of incoming line, the two ends of its secondary are connected on two inputs of diode rectifier U101, the negative output terminal ground connection of diode rectifier U101, the GND pin ground connection of voltage stabilizing integrated chip Q101, its IN pin is connected with the positive pole of electric capacity C101, the negative input end of operational amplifier P102 is connected with the collector electrode of triode VT102, the emitter of triode VT102 is connected with the emitter of the base stage of triode VT103 with the base stage of triode VT106 and triode VT101 simultaneously, the N pole of diode D101 is also connected with the collector electrode of triode VT103 with the collector electrode of triode VT104, the base stage of triode VT104 is connected with the emitter of triode VT105 with the emitter of triode VT103 simultaneously, the emitter of triode VT104 is connected with the collector electrode of triode VT106, the grounded emitter of triode VT106, the normally-closed contact switch S 101 of described relay K 101 is arranged on incoming line.
Further, described switched filter circuit is by triode Q1, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form; The base stage of described triode Q1 forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1, and electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel; The collector electrode of triode Q1 is connected with the cathode output end of diode rectifier U, and its emitter is connected with the output of power amplifier P2; Resistance R2 is then connected with the electrode input end of power amplifier P1 with the tie point of diode D1; Described primary coil L1 is then in parallel with diode D1, and the output of power amplifier P1 is then connected with the input of sliding damper.
The diode D2 that described power output circuit is connected with the Same Name of Ends of secondary coil L2 by P pole, N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3, and the inductance L 4 that one end is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4 forms.
Described transformation feedback circuit is made up of diode D3 and electric capacity C5; The P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, the Same Name of Ends ground connection of described secondary coil L3; Meanwhile, the output of power amplifier P1 is also connected with the tie point of electric capacity C5 with triode D3.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention adopts brand-new logical power voltage stabilizing circuit to provide high-quality input voltage for transformer T, circuit structure can not only be simplified, and circuit self and external radio frequency interference can also be reduced, cost of manufacture and maintenance cost are had reduction by a relatively large margin.
(2) the present invention can regulate the number of turn of primary transformer coil automatically, therefore, it is possible to carry out pressure regulation according to the actual demand of people.
(3) the present invention effectively can overcome the late effect of conventional power source circuit, effectively can improve the quality of power supply.
(4) the present invention is provided with composite type protective circuit, can power by automatic shutoff circuit, avoid circuit by curtage impact failure, better extend the useful life of circuit when the running current of circuit or voltage exceed preset value.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is virtual protection amplification circuit structure schematic diagram of the present invention.
Fig. 3 is the circuit diagram of composite type amplifying circuit of the present invention.
Description of reference numerals:
10, composite type amplifying circuit; 20, virtual protection amplifying circuit; 30, sliding damper.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention is primarily of diode rectifier U, power amplifier P1, transformer T, be serially connected in the switched filter circuit between the cathode output end of diode rectifier U and the electrode input end of power amplifier P1, the sliding damper be connected with the sliding tap of the primary coil L1 of transformer T, the power output circuit be connected with the secondary coil L2 of transformer T, the transformation feedback circuit be connected with the secondary coil L3 of transformer T, with diode rectifier U, the logical power voltage stabilizing circuit that switched filter circuit is connected with power amplifier P1, be serially connected in the virtual protection amplifying circuit 20 between logical power voltage stabilizing circuit and power amplifier P1, and the composite type protective circuit 10 be arranged on diode rectifier U forms.
The structure of described virtual protection amplifying circuit 20 as shown in Figure 2, it is primarily of power amplifier P3, power amplifier P4, NAND gate IC5, NAND gate IC6, negative pole is connected with the electrode input end of power amplifier P3, the polar capacitor C7 that positive pole is connected with the negative input of NAND gate IC6 after resistance R12, one end is connected with the negative input of NAND gate IC5, the resistance R9 that the other end is connected with the electrode input end of power amplifier P3, be serially connected in the resistance R10 between the negative input of power amplifier P3 and output, one end is connected with the output of NAND gate IC5, the resistance R11 that the other end is connected with the negative input of power amplifier P4, be serially connected in the polar capacitor C9 between the electrode input end of power amplifier P4 and output, positive pole is connected with the output of NAND gate IC6, negative pole is in turn through electric capacity C8 that voltage stabilizing didoe D5 is connected with the output of power amplifier P3 after resistance R13, P pole is connected with the output of power amplifier P4, N pole is in turn through diode D6 that resistance R15 is connected with the tie point of resistance R13 with voltage stabilizing didoe D5 after resistance R14, and N pole is connected with the negative pole of electric capacity C8, the voltage stabilizing didoe D7 that P pole is connected with the tie point of resistance R15 with diode D6 forms.
Meanwhile, the electrode input end of described NAND gate IC5 is connected with the negative input of power amplifier P3; The electrode input end of the output NAND gate IC6 of power amplifier P4 is connected, and its electrode input end is then connected with the output of power amplifier P3.
As shown in Figure 3, described composite type protective circuit 10 is by incoming line, transformer T101, diode rectifier U101, voltage stabilizing integrated chip Q101, operational amplifier P101, operational amplifier P102, triode VT101, triode VT102, triode VT103, triode VT104, triode VT105, triode VT106, resistance R101, resistance R102, resistance R103, resistance R104, resistance R105, resistance R106, resistance R107, resistance R108, resistance R109, resistance R110, electric capacity C101, electric capacity C102, electric capacity C103, electric capacity C104, diode D101, voltage stabilizing didoe D102, slide rheostat RP101, slide rheostat RP102 forms, during connection, the minus earth of electric capacity C101, positive pole is connected with the positive output end of diode rectifier U101, the minus earth of electric capacity C102, positive pole is connected with the OUT pin of voltage stabilizing integrated chip Q101, one end of resistance R101 is connected with the positive pole of electric capacity C102, the other end is connected with the negative input end of operational amplifier P101, the N pole of diode D101 is connected with the positive pole of electric capacity C102, negative pole is connected with the collector electrode of triode VT101, relay K 101 is in parallel with diode D101, one end of resistance R103 is connected with the P pole of diode D101, the other end is ground connection after resistance R102, one end of resistance R104 is connected with the base stage of triode VT101, the other end is connected with the output of operational amplifier P101, the minus earth of electric capacity C103, positive pole is connected with the positive input terminal of operational amplifier P101, one end ground connection of slide rheostat RP101, the other end is connected with the positive pole of electric capacity C103, the minus earth of electric capacity C104, positive pole is connected with the positive pole of electric capacity C102 after resistance R109, the P pole of voltage stabilizing didoe D102 is connected with the positive input terminal of operational amplifier P102, N pole is connected with the positive pole of electric capacity C104, one end of resistance R108 is connected with the positive pole of electric capacity C102, the other end is connected with the negative input end of operational amplifier P102, one end ground connection of resistance R107, the other end is connected with the negative input end of operational amplifier P102, one end of resistance R106 is connected with the output of operational amplifier P102, the other end is connected with the base stage of triode VT102, one end of resistance R105 is connected with the N pole of diode D101, the other end is connected with the base stage of triode VT103, one end of resistance R110 is connected with the emitter of triode VT104, the other end is connected with the collector electrode of triode VT105, one end of slide rheostat RP102 is connected with the base stage of triode VT104, the other end is connected with the emitter of triode VT106, sliding end is connected with the base stage of triode VT105, wherein, the two ends on the former limit of transformer T101 are connected in two input lines of incoming line, the two ends of its secondary are connected on two inputs of diode rectifier U101, the negative output terminal ground connection of diode rectifier U101, the GND pin ground connection of voltage stabilizing integrated chip Q101, its IN pin is connected with the positive pole of electric capacity C101, the negative input end of operational amplifier P102 is connected with the collector electrode of triode VT102, the emitter of triode VT102 is connected with the emitter of the base stage of triode VT103 with the base stage of triode VT106 and triode VT101 simultaneously, the N pole of diode D101 is also connected with the collector electrode of triode VT103 with the collector electrode of triode VT104, the base stage of triode VT104 is connected with the emitter of triode VT105 with the emitter of triode VT103 simultaneously, the emitter of triode VT104 is connected with the collector electrode of triode VT106, the grounded emitter of triode VT106, the normally-closed contact switch S 101 of described relay K 101 is arranged on incoming line.When the voltage of circuit or electric current exceed preset value, relay K 101 electric, thus normally-closed contact switch S 101 is disconnected, makes whole down circuitry.
Described logical power voltage stabilizing circuit is by power amplifier P2, NAND gate IC1, NAND gate IC2, NAND gate IC3, NAND gate IC4, and diode D4, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8 and electric capacity C6 form.During connection, the N pole of diode D4 is connected with the output of power amplifier P2, its P pole ground connection after resistance R4.One end of resistance R5 is connected with the first input end of NAND gate IC1, and its other end is then connected with the output of NAND gate IC2 after electric capacity C6; One end of resistance R6 is connected with the output of NAND gate IC1, and its other end is connected with the tie point of electric capacity C6 with resistance R5.
Described one end of resistance R7 is connected with the output of NAND gate IC3, and its other end is connected with the positive pole of polar capacitor C7; One end of resistance R8 is connected with the output of NAND gate IC4, and its other end is connected with the positive pole of polar capacitor C7; One end of resistance R3 is connected with the negative input of power amplifier P2, its other end ground connection.
Meanwhile, second input end grounding of NAND gate IC1, its output is then connected with the first input end of NAND gate IC2; Second input of NAND gate IC2 is connected with the electrode input end of power amplifier P2, its output is then connected with second input of NAND gate IC4 with the first input end of NAND gate IC3 respectively, and second input of NAND gate IC3 is connected with the first input end of NAND gate IC4.The electrode input end of described power amplifier P2 is then connected with the cathode output end of diode rectifier U, and resistance R15 is then connected with the negative input of power amplifier P1 with the tie point of resistance R14.
Described switched filter circuit is by triode Q1, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form.During connection, the base stage of triode Q1 forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1, and electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel.The collector electrode of triode Q1 is connected with the cathode output end of diode rectifier U, and its emitter is connected with the output of power amplifier P2; Resistance R2 is then connected with the electrode input end of power amplifier P1 with the tie point of diode D1.
Wherein, resistance R1, electric capacity C1 and diode D1 form feedback-clamp circuit, can improve the peak-inverse voltage of conversion efficiency and reduction power amplifier P1 electrode input end.
Described transformer T is then by the primary coil L1 being arranged on former limit, and the secondary coil L2 and the secondary coil L3 that are arranged on secondary form.The present invention is provided with a sliding tap on the primary coil L1 of transformer T, and this sliding tap is controlled by sliding damper, to guarantee that the present invention can adjust the turn ratio between the primary coil L1 of transformer T and secondary coil L2 and secondary coil L3 automatically.
During connection, this primary coil L1 will be in parallel with diode D1, and the output of power amplifier P1 is then connected with the input of sliding damper.
The diode D2 that described power output circuit is connected with the Same Name of Ends of secondary coil L2 by P pole, N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3, and the inductance L 4 that one end is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4 forms.The two ends of electric capacity C4 then form the output of this driving power.
Described transformation feedback circuit is used for providing feedback signal and feedback voltage to sliding damper, and then guarantees that this sliding damper the load external according to output can reconcile the turn ratio of transformer T automatically.This transformation feedback circuit is made up of diode D3 and electric capacity C5; The P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, the Same Name of Ends ground connection of described secondary coil L3; Meanwhile, the output of power amplifier P1 is also connected with the tie point of electric capacity C5 with triode D3.
For guaranteeing actual operational effect, the electric capacity C1 in the application, electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5 and electric capacity C6 all adopt patch capacitor to realize.
As mentioned above, just the present invention can well be realized.
Claims (4)
1. Power System Faults Detection combined protection type virtual protection amplifying type driving power, primarily of diode rectifier U, power amplifier P1, transformer T, be serially connected in the switched filter circuit between the cathode output end of diode rectifier U and the electrode input end of power amplifier P1, the sliding damper be connected with the sliding tap of the primary coil L1 of transformer T, the power output circuit be connected with the secondary coil L2 of transformer T, and the transformation feedback circuit to be connected with the secondary coil L3 of transformer T forms, it is characterized in that, also be provided with and diode rectifier U, the logical power voltage stabilizing circuit that switched filter circuit is connected with power amplifier P1, be serially connected in the virtual protection amplifying circuit (20) between logical power voltage stabilizing circuit and power amplifier P1, and the composite type protective circuit (10) be arranged on diode rectifier U, described virtual protection amplifying circuit (20) is primarily of power amplifier P3, power amplifier P4, NAND gate IC5, NAND gate IC6, negative pole is connected with the electrode input end of power amplifier P3, the polar capacitor C7 that positive pole is connected with the negative input of NAND gate IC6 after resistance R12, one end is connected with the negative input of NAND gate IC5, the resistance R9 that the other end is connected with the electrode input end of power amplifier P3, be serially connected in the resistance R10 between the negative input of power amplifier P3 and output, one end is connected with the output of NAND gate IC5, the resistance R11 that the other end is connected with the negative input of power amplifier P4, be serially connected in the polar capacitor C9 between the electrode input end of power amplifier P4 and output, positive pole is connected with the output of NAND gate IC6, negative pole is in turn through electric capacity C8 that voltage stabilizing didoe D5 is connected with the output of power amplifier P3 after resistance R13, P pole is connected with the output of power amplifier P4, N pole is in turn through diode D6 that resistance R15 is connected with the tie point of resistance R13 with voltage stabilizing didoe D5 after resistance R14, and N pole is connected with the negative pole of electric capacity C8, the voltage stabilizing didoe D7 that P pole is connected with the tie point of resistance R15 with diode D6 forms, the electrode input end of described NAND gate IC5 is connected with the negative input of power amplifier P3, the electrode input end of the output NAND gate IC6 of power amplifier P4 is connected, and its electrode input end is then connected with the output of power amplifier P3,
Described logical power voltage stabilizing circuit is by power amplifier P2, NAND gate IC1, NAND gate IC2, NAND gate IC3, NAND gate IC4, N pole is connected with the output of power amplifier P2, the diode D4 of P pole ground connection after resistance R4, one end is connected with the first input end of NAND gate IC1, the resistance R5 that the other end is connected with the output of NAND gate IC2 after electric capacity C6, one end is connected with the output of NAND gate IC1, the resistance R6 that the other end is connected with the tie point of electric capacity C6 with resistance R5, one end is connected with the output of NAND gate IC3, the resistance R7 that the other end is connected with the positive pole of polar capacitor C7, one end is connected with the output of NAND gate IC4, the resistance R8 that the other end is connected with the positive pole of polar capacitor C7, and one end is connected with the negative input of power amplifier P2, the resistance R3 of other end ground connection forms, second input end grounding of described NAND gate IC1, its output is also connected with the first input end of NAND gate IC2, second input of NAND gate IC2 is connected with the electrode input end of power amplifier P2, its output is then connected with second input of NAND gate IC4 with the first input end of NAND gate IC3 respectively, and second input of NAND gate IC3 is connected with the first input end of NAND gate IC4, the electrode input end of described power amplifier P2 is then connected with the cathode output end of diode rectifier U, and meanwhile, the output of power amplifier P2 is also connected with switched filter circuit, described resistance R15 is then connected with the negative input of power amplifier P1 with the tie point of resistance R14,
Described composite type protective circuit (10) is by incoming line, transformer T101, diode rectifier U101, voltage stabilizing integrated chip Q101, operational amplifier P101, operational amplifier P102, triode VT101, triode VT102, triode VT103, triode VT104, triode VT105, triode VT106, minus earth, the electric capacity C101 that positive pole is connected with the positive output end of diode rectifier U101, minus earth, the electric capacity C102 that positive pole is connected with the OUT pin of voltage stabilizing integrated chip Q101, one end is connected with the positive pole of electric capacity C102, the resistance R101 that the other end is connected with the negative input end of operational amplifier P101, N pole is connected with the positive pole of electric capacity C102, the diode D101 that negative pole is connected with the collector electrode of triode VT101, the relay K 101 in parallel with diode D101, one end is connected with the P pole of diode D101, the resistance R103 of other end ground connection after resistance R102, one end is connected with the base stage of triode VT101, the resistance R104 that the other end is connected with the output of operational amplifier P101, minus earth, the electric capacity C103 that positive pole is connected with the positive input terminal of operational amplifier P101, one end ground connection, the slide rheostat RP101 that the other end is connected with the positive pole of electric capacity C103, minus earth, the electric capacity C104 that positive pole is connected with the positive pole of electric capacity C102 after resistance R109, P pole is connected with the positive input terminal of operational amplifier P102, the voltage stabilizing didoe D102 that N pole is connected with the positive pole of electric capacity C104, one end is connected with the positive pole of electric capacity C102, the resistance R108 that the other end is connected with the negative input end of operational amplifier P102, one end ground connection, the resistance R107 that the other end is connected with the negative input end of operational amplifier P102, one end is connected with the output of operational amplifier P102, the resistance R106 that the other end is connected with the base stage of triode VT102, one end is connected with the N pole of diode D101, the resistance R105 that the other end is connected with the base stage of triode VT103, one end is connected with the emitter of triode VT104, the resistance R110 that the other end is connected with the collector electrode of triode VT105, and one end is connected with the base stage of triode VT104, the other end is connected with the emitter of triode VT106, the slide rheostat RP102 that sliding end is connected with the base stage of triode VT105 forms, wherein, the two ends on the former limit of transformer T101 are connected in two input lines of incoming line, the two ends of its secondary are connected on two inputs of diode rectifier U101, the negative output terminal ground connection of diode rectifier U101, the GND pin ground connection of voltage stabilizing integrated chip Q101, its IN pin is connected with the positive pole of electric capacity C101, the negative input end of operational amplifier P102 is connected with the collector electrode of triode VT102, the emitter of triode VT102 is connected with the emitter of the base stage of triode VT103 with the base stage of triode VT106 and triode VT101 simultaneously, the N pole of diode D101 is also connected with the collector electrode of triode VT103 with the collector electrode of triode VT104, the base stage of triode VT104 is connected with the emitter of triode VT105 with the emitter of triode VT103 simultaneously, the emitter of triode VT104 is connected with the collector electrode of triode VT106, the grounded emitter of triode VT106, the normally-closed contact switch S 101 of described relay K 101 is arranged on incoming line.
2. Power System Faults Detection combined protection type virtual protection amplifying type driving power according to claim 1, it is characterized in that, described switched filter circuit is by triode Q1, and electric capacity C1, electric capacity C2, resistance R1, resistance R2 and diode D1 form; The base stage of described triode Q1 forms loop with its collector electrode in turn after resistance R2, diode D1 and resistance R1, and electric capacity C1 and resistance R1 is in parallel, and electric capacity C2 and resistance R2 is in parallel; The collector electrode of triode Q1 is connected with the cathode output end of diode rectifier U, and its emitter is connected with the output of power amplifier P2; Resistance R2 is then connected with the electrode input end of power amplifier P1 with the tie point of diode D1; Described primary coil L1 is then in parallel with diode D1, and the output of power amplifier P1 is then connected with the input of sliding damper.
3. Power System Faults Detection combined protection type virtual protection amplifying type driving power according to claim 2; it is characterized in that; the diode D2 that described power output circuit is connected with the Same Name of Ends of secondary coil L2 by P pole, N pole is connected with the non-same polarity of secondary coil L2 after electric capacity C3, and the inductance L 4 that one end is connected with the N pole of diode D2, the other end is connected with the non-same polarity of secondary coil L2 after electric capacity C4 forms.
4. Power System Faults Detection combined protection type virtual protection amplifying type driving power according to claim 3, it is characterized in that, described transformation feedback circuit is made up of diode D3 and electric capacity C5; The P pole of described diode D3 is connected with the non-same polarity of secondary coil L3, its N pole is connected with the Same Name of Ends of secondary coil L3 after electric capacity C5, the Same Name of Ends ground connection of described secondary coil L3; Meanwhile, the output of power amplifier P1 is also connected with the tie point of electric capacity C5 with triode D3.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105222913A (en) * | 2015-11-09 | 2016-01-06 | 四川华索自动化信息工程有限公司 | A kind of carbon baking furnace three-terminal voltage-stabilizing filter resonance formula temperature alarm system |
| CN105425706A (en) * | 2015-12-16 | 2016-03-23 | 成都飞凯瑞科技有限公司 | Intelligent control system for range hood based on logic gate protection circuit |
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| CN104391164A (en) * | 2014-11-18 | 2015-03-04 | 成都措普科技有限公司 | High-precision mains supply monitoring system |
| CN104467479A (en) * | 2014-11-27 | 2015-03-25 | 成都措普科技有限公司 | Novel logical protection amplifying type driving power supply for power system fault detection device |
| CN104467478A (en) * | 2014-11-25 | 2015-03-25 | 成都思茂科技有限公司 | Novel balanced modulation type multiplexed output voltage-stabilized source |
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| CN104391164A (en) * | 2014-11-18 | 2015-03-04 | 成都措普科技有限公司 | High-precision mains supply monitoring system |
| CN104467478A (en) * | 2014-11-25 | 2015-03-25 | 成都思茂科技有限公司 | Novel balanced modulation type multiplexed output voltage-stabilized source |
| CN104467479A (en) * | 2014-11-27 | 2015-03-25 | 成都措普科技有限公司 | Novel logical protection amplifying type driving power supply for power system fault detection device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105222913A (en) * | 2015-11-09 | 2016-01-06 | 四川华索自动化信息工程有限公司 | A kind of carbon baking furnace three-terminal voltage-stabilizing filter resonance formula temperature alarm system |
| CN105425706A (en) * | 2015-12-16 | 2016-03-23 | 成都飞凯瑞科技有限公司 | Intelligent control system for range hood based on logic gate protection circuit |
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