CN109004624B - Open-phase detection module of three-phase turnout point machine and application method thereof - Google Patents
Open-phase detection module of three-phase turnout point machine and application method thereof Download PDFInfo
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- CN109004624B CN109004624B CN201811076791.0A CN201811076791A CN109004624B CN 109004624 B CN109004624 B CN 109004624B CN 201811076791 A CN201811076791 A CN 201811076791A CN 109004624 B CN109004624 B CN 109004624B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention relates to a phase failure detection module of a three-phase turnout point machine and a use method thereof, which are mainly applied to the technical field of rail transit and comprise a first current transformer B1, a second current transformer B2, a first optocoupler G1, a second optocoupler G2, a third optocoupler G3 and a fourth optocoupler G4, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a second capacitor C2, a first diode D1 and a second diode D2. The three-phase switch machine has the advantages of reasonable structural design, convenient operation and use, low maintenance cost, long service life, capability of effectively solving the problem of universalization of the three-phase switch machine and the single-phase switch machine, simplified design scheme, cost saving and the like.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a phase failure detection module of a three-phase turnout point machine and a use method thereof.
Background
At present, turnout control interface circuits adopted in China are divided into; a 4-wire control circuit, a 5-wire control circuit and a 6-wire control circuit. The switch control interface circuit adopted at present adopts different shaping relay combinations according to different interface modes, and the relay adopts a gravity type relay, so that the defects of the method are as follows: (1) The gravity type relay has large volume, high cost and large occupied space; (2) The gravity type relay has short service life and needs to be regularly maintained by a professional institution, other application units except China iron have no maintenance capability, and serious influence restricts the China signal products to enter the international market. According to the above problems, a small-sized modularized turnout interface circuit is designed, and because the small-sized modularized turnout interface circuit cancels a starting and maintaining relay, a sensor is required to collect the current of a switch machine, then the current is sent to a CPU to process and judge whether the current and the phase failure exist, and the common practice requires three current sensors and three I/O collection channels to process (as shown in figure 7). However, the above-described structure has the disadvantages of high cost and poor versatility. The present invention has been made in view of this research background.
Disclosure of Invention
The invention aims at: the phase failure detection module of the three-phase switch machine and the use method thereof are provided, and the phase failure detection module has the advantages of reasonable structural design, convenient operation and use, low maintenance cost, long service life, capability of effectively solving the problem of universalization of the three-phase switch machine and the single-phase switch machine, simplified design scheme, cost saving and the like.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the phase failure detection module of the three-phase turnout point machine comprises a first current transformer B1, a second current transformer B2, a first optocoupler G1, a second optocoupler G2, a third optocoupler G3 and a fourth optocoupler G4, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8, a first capacitor C1, a second capacitor C2, a first diode D1 and a second diode D2;
wherein the secondary output of the first current transformer B1 is connected to the input end of the second optocoupler G2 through a second resistor R2 in series, the secondary output of the second current transformer B2 is connected to the input end of the first optocoupler G1 through a first resistor R1 in series, the emitter of the first optocoupler G1 is connected to GND through a third resistor R3, the emitter of the second optocoupler G2 is connected to GND through a fourth resistor R4, a fifth resistor R5 is connected between the emitters of the first optocoupler G1 and the second optocoupler G2, the input ends of the third optocoupler G3 and the fourth optocoupler G4 are connected in positive and negative cross and in parallel to the fifth resistor R5, one end of a sixth resistor R6 is connected in series with the collector of the output end of the third optocoupler G3, the emitter of the third optocoupler G3 is connected in series with the collector of the output end of the fourth optocoupler G4, the emitter of the output end of the fourth optical coupler G4 is connected with GND in series with a seventh resistor R7, the positive electrode of a first capacitor C1 is respectively connected with the emitter of the output end of a third optical coupler G3 and the collector of the output end of the fourth optical coupler G4, the negative electrode of the first capacitor C1 is respectively connected with the negative electrode of a first diode D1 and the positive electrode of a second diode D2, the negative electrode of the second diode D2 is connected with GND, the positive electrode of the first diode D1 is respectively connected with the negative electrode of a second capacitor C2 and one end of an eighth resistor R8, the collectors of the output ends of the first optical coupler G1 and the second optical coupler G2 are connected with 24V, the other end of a sixth resistor R6 is connected with 24V, the other end of the eighth resistor is connected with an output interface P1, and the output interface P1 is also connected with an I/O acquisition channel;
the phase failure detection module of the three-phase switch machine further comprises a three-phase power supply consisting of an A-phase power supply, a B-phase power supply and a C-phase power supply, wherein the A-phase power supply is directly connected to a first coil L1 of the three-phase switch machine motor M, the B-phase power supply is connected to a second coil L2 of the three-phase switch machine motor M through a first current transformer B1, and the C-phase power supply is connected to a third coil L3 of the three-phase switch machine motor M through a current transformer B2.
As a further optimization of the scheme, the first current transformer B1 and the second current transformer B2 are TA0913-2M core-penetrating current transformers.
The application method of the open-phase detection module of the three-phase turnout point machine comprises the following steps:
1) When three-phase currents generated by a three-phase power supply consisting of an A-phase power supply, a B-phase power supply and a C-phase power supply all rotate a three-phase turnout point machine motor M, secondary output ends of a first current transformer B1 and a second current transformer B2 output induced currents;
when the currents of the B-phase power supply and the C-phase power supply pass through the first current transformer B1 and the second current transformer B2, the first current transformer B1 and the second current transformer B2 respectively output an induced current, the phases of the induced currents have 120-degree phase differences, the induced currents are output after being isolated and shaped by the first optical coupler G1 and the second optical coupler G2, when the second optical coupler G2 outputs a high level, the third optical coupler G3 is opened, and when the first optical coupler G1 and the second optical coupler G2 both output a high level, the third optical coupler G3 and the fourth optical coupler G4 are closed; when the first optocoupler G1 outputs a high level, the fourth optocoupler G4 is turned on; the phase difference of input signals of the third optical coupler G3 and the fourth optical coupler G4 is 180 degrees, and the signals control the third optical coupler G3 and the fourth optical coupler G4 to be turned on and off in turn so as to charge and discharge the first capacitor C1; when the third optocoupler G3 is conducted, the first capacitor C1 is charged through the sixth resistor R6, the third optocoupler G3, the first capacitor C1 and the second diode D2, and when the third optocoupler G3 is turned off and the fourth optocoupler G4 is conducted, the seventh resistor R7, the fourth optocoupler G4, the first capacitor C1, the first diode D1 and the second capacitor C2 are discharged, at the moment, the charge on the first capacitor C1 is transferred to the second capacitor C2, a voltage is generated on the second capacitor C2, and a direct-current voltage signal is output through the output interface P1 for the control system to serve as a turnout action current and a phase failure check;
2) When the phase A power supply is absent in a three-phase power supply formed by the phase A power supply, the phase B power supply and the phase C power supply, the current generated by the phase B power supply returns to the phase C power supply through the first current transformer B1, the second coil L2, the third coil L3 and the second current transformer B2, and the phase of the same-name ends of the output currents of the first current transformer B1 and the second current transformer B2 is the same and is 0 degrees; after the first optical coupler G1 and the second optical coupler G2 are isolated and shaped, the output of the first optical coupler G1 and the output of the second optical coupler G2 are simultaneously output with high level or simultaneously output with low level, the input signals of the third optical coupler G3 and the fourth optical coupler G4 are low level, the third optical coupler G3 and the fourth optical coupler G4 cannot be conducted in turn, charge and discharge the first capacitor C1, and a0 voltage signal is output through the output interface P1;
3) When a B phase power supply is absent in a three-phase power supply consisting of an A phase power supply, a B phase power supply and a C phase power supply, only the second current transformer B2 in the first current transformer B1 and the second current transformer B2 outputs induction current, the first optocoupler G1 outputs pulse signals after being isolated and shaped by the first optocoupler G1 and the second optocoupler G2, the second optocoupler G2 outputs low level, the fourth optocoupler G4 only can discharge the first capacitor C1, the third optocoupler G3 can not finish charging the first capacitor C1, the first capacitor C1 can not finish alternating work of charging and discharging, and a0 voltage signal is output through an output interface P1;
4) When the C phase power is absent in a three-phase power supply consisting of an A-phase power supply, a B-phase power supply and a C-phase power supply, the first current transformer B1 and the second current transformer B2 only output induced currents through the first current transformer B1, the second optocoupler G2 outputs pulse signals after being isolated and shaped through the first optocoupler G1 and the second optocoupler G2, the first optocoupler G1 outputs low level, the third optocoupler G3 only can charge the first capacitor C1, the fourth optocoupler G4 cannot finish discharging the first capacitor C1, the first capacitor C1 cannot finish alternating work of charging and discharging, and a0 voltage signal is output through the output interface P1.
As a further optimization of the above-described solution,
the phase failure detection module of the three-phase turnout point machine and the use method thereof have the following beneficial effects:
(1) The three-phase current and the open-phase detection are completed by adopting two current sensors and one I/O channel, if one inlet port N is added, the compatibility of the three-phase current and the single-phase current detection can be realized, and the wiring diagram shown in fig. 6 is simpler in structure and more reasonable in design, so that the miniaturized modularized turnout interface circuit can realize the universalization of the three-phase turnout point switch and the single-phase turnout point switch, the design scheme is simplified, and the cost is saved. The method can be used for current and phase failure detection of all three-phase turnout switches, such as S700K, current detection of single-phase turnout switches and the like.
(2) The cost processing cost of the phase failure detection module of the three-phase switch machine is not more than 200 yuan/group of switches, the cost is reduced by 95%, and the phase failure detection module of the three-phase switch machine is directly placed in the electronic control interface module of the switch machine, so that the space is not occupied.
(3) The life of the traditional turnout combined open-phase protector and a starting relay is 50 ten thousand times, and the open-phase detection module of the three-phase turnout switch machine has no limit on the number of times of actions.
Drawings
Fig. 1 is a schematic diagram of the working principle of the phase failure detection module of the three-phase switch machine.
Fig. 2 is a normal waveform diagram of the phase failure detection module of the three-phase switch machine of the present invention.
Fig. 3 is a waveform diagram of a phase failure of the phase failure detection module of the three-phase switch machine according to the present invention.
Fig. 4 is a waveform diagram of the phase failure detection module of the three-phase switch machine of the present invention.
Fig. 5 is a waveform diagram of the phase failure detection module of the three-phase switch machine according to the present invention.
Fig. 6 is a schematic diagram of a phase failure detection module of the three-phase switch machine according to the present invention in a single-phase and three-phase current detection combination.
Fig. 7 is a schematic diagram of a three-phase current detection combination in the prior art.
Detailed Description
The following describes in detail a phase failure detection module for a three-phase switch machine and a method of using the same in accordance with the present invention with reference to fig. 1-6.
As shown in fig. 1, a phase failure detection module of a three-phase switch machine comprises a first current transformer B1, a second current transformer B2, a first optocoupler G1, a second optocoupler G2, a third optocoupler G3, a fourth optocoupler G4, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a second capacitor C2, a first diode D1, and a second diode D2;
wherein the secondary output of the first current transformer B1 is connected to the input end of the second optocoupler G2 through a second resistor R2 in series, the secondary output of the second current transformer B2 is connected to the input end of the first optocoupler G1 through a first resistor R1 in series, the emitter of the first optocoupler G1 is connected to GND through a third resistor R3, the emitter of the second optocoupler G2 is connected to GND through a fourth resistor R4, a fifth resistor R5 is connected between the emitters of the first optocoupler G1 and the second optocoupler G2, the input ends of the third optocoupler G3 and the fourth optocoupler G4 are connected in positive and negative cross and in parallel to the fifth resistor R5, one end of a sixth resistor R6 is connected in series with the collector of the output end of the third optocoupler G3, the emitter of the third optocoupler G3 is connected in series with the collector of the output end of the fourth optocoupler G4, the emitter of the output end of the fourth optical coupler G4 is connected with GND in series with a seventh resistor R7, the positive electrode of a first capacitor C1 is respectively connected with the emitter of the output end of a third optical coupler G3 and the collector of the output end of the fourth optical coupler G4, the negative electrode of the first capacitor C1 is respectively connected with the negative electrode of a first diode D1 and the positive electrode of a second diode D2, the negative electrode of the second diode D2 is connected with GND, the positive electrode of the first diode D1 is respectively connected with the negative electrode of a second capacitor C2 and one end of an eighth resistor R8, the collectors of the output ends of the first optical coupler G1 and the second optical coupler G2 are connected with 24V, the other end of a sixth resistor R6 is connected with 24V, the other end of the eighth resistor is connected with an output interface P1, and the output interface P1 is also connected with an I/O acquisition channel;
the phase failure detection module of the three-phase switch machine further comprises a three-phase power supply consisting of an A-phase power supply, a B-phase power supply and a C-phase power supply, wherein the A-phase power supply is directly connected to a first coil L1 of the three-phase switch machine motor M, the B-phase power supply is connected to a second coil L2 of the three-phase switch machine motor M through a first current transformer B1, and the C-phase power supply is connected to a third coil L3 of the three-phase switch machine motor M through a current transformer B2.
The first current transformer B1 and the second current transformer B2 are TA0913-2M core-penetrating current transformers; the first optocoupler G1, the second optocoupler G2, the third optocoupler G3 and the fourth optocoupler G4 are all AQW optocouplers, the first capacitor C1 and the second capacitor C2 are all 100uF/50V electrolytic capacitors, and the first diode D1 and the second diode D2 are all RF107.
The invention adopts two current sensors and one I/O channel to complete three-phase current and phase failure detection structurally, if one inlet port N is added, the compatibility of three-phase current and single-phase current detection can be realized, as shown in the wiring diagram of FIG. 6, the miniaturized modularized turnout interface circuit can realize the universalization of the three-phase turnout switch machine and the single-phase turnout switch machine, the design scheme is simplified, and the cost is saved. Can be used for current and open-phase inspection of all three-phase turnout switches, such as current detection of S700K and single-phase turnout switches
The application method of the open-phase detection module of the three-phase turnout point machine comprises the following steps:
as shown in fig. 1, 1), when three-phase currents generated by a three-phase power supply consisting of an a-phase power supply, a B-phase power supply and a C-phase power supply all rotate a three-phase switch machine motor M, secondary output ends of a first current transformer B1 and a second current transformer B2 output induced currents;
as shown in fig. 2, when the currents of the B-phase power supply and the C-phase power supply pass through the first current transformer B1 and the second current transformer B2, the first current transformer B1 and the second current transformer B2 respectively output an induced current, the phases of the induced currents have 120-degree phase differences, the waveform diagram after isolation and shaping of the first optocoupler G1 and the second optocoupler G2 is shown as the output in fig. 2, when the second optocoupler G2 outputs a high level, the third optocoupler G3 is turned on, and when the first optocoupler G1 and the second optocoupler G2 both output a high level, the third optocoupler G3 and the fourth optocoupler G4 are turned off; when the first optocoupler G1 outputs a high level, the fourth optocoupler G4 is turned on; the phase difference of input signals of the third optical coupler G3 and the fourth optical coupler G4 is 180 degrees, and the signals control the third optical coupler G3 and the fourth optical coupler G4 to be turned on and off in turn so as to charge and discharge the first capacitor C1; when the third optocoupler G3 is conducted, the first capacitor C1 is charged through the sixth resistor R6, the third optocoupler G3, the first capacitor C1 and the second diode D2, and when the third optocoupler G3 is turned off and the fourth optocoupler G4 is conducted, the seventh resistor R7, the fourth optocoupler G4, the first capacitor C1, the first diode D1 and the second capacitor C2 are discharged, at the moment, the charge on the first capacitor C1 is transferred to the second capacitor C2, a voltage is generated on the second capacitor C2, and a direct-current voltage signal is output through the output interface P1 for the control system to serve as a turnout action current and a phase failure check;
2) When the phase A power supply is absent in a three-phase power supply formed by the phase A power supply, the phase B power supply and the phase C power supply, the current generated by the phase B power supply returns to the phase C power supply through the first current transformer B1, the second coil L2, the third coil L3 and the second current transformer B2, and at the moment, the phase of the same-name ends of the output currents of the first current transformer B1 and the second current transformer B2 is the same, and the phase is 0 degrees, as shown in fig. 3; after the first optical coupler G1 and the second optical coupler G2 are isolated and shaped, the output of the first optical coupler G1 and the output of the second optical coupler G2 are simultaneously output with high level or simultaneously output with low level, the input signals of the third optical coupler G3 and the fourth optical coupler G4 are low level, the third optical coupler G3 and the fourth optical coupler G4 cannot be conducted in turn, charge and discharge the first capacitor C1, and a0 voltage signal is output through the output interface P1;
3) When a B phase power supply is absent in a three-phase power supply consisting of an A phase power supply, a B phase power supply and a C phase power supply, as shown in fig. 4, only the second current transformer B2 in the first current transformer B1 and the second current transformer B2 outputs induction current, the first optocoupler G1 outputs pulse signals after being isolated and shaped by the first optocoupler G1 and the second optocoupler G2, the second optocoupler G2 outputs low level, the fourth optocoupler G4 only can discharge the first capacitor C1, the third optocoupler G3 can not complete charging of the first capacitor C1, the first capacitor C1 can not complete alternating charge and discharge, and a0 voltage signal is output through the output interface P1;
4) When the phase C is absent in the three-phase power supply consisting of the phase A power supply, the phase B power supply and the phase C power supply, as shown in fig. 5, the first current transformer B1 and the second current transformer B2 only output induced current, the second optocoupler G2 outputs pulse signals after the isolation and shaping of the first optocoupler G1 and the second optocoupler G2, the first optocoupler G1 outputs low level, the third optocoupler G3 only charges the first capacitor C1, the fourth optocoupler G4 can not finish discharging the first capacitor C1, the first capacitor C1 can not finish alternating charge and discharge, and a0 voltage signal is output through the output interface P1.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (3)
1. A phase failure detection module of a three-phase switch machine is characterized in that: the three-phase turnout point machine open-phase detection module comprises a first current transformer B1, a second current transformer B2, a first optocoupler G1, a second optocoupler G2, a third optocoupler G3, a fourth optocoupler G4, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first capacitor C1, a second capacitor C2, a first diode D1 and a second diode D2;
wherein the secondary output of the first current transformer B1 is connected to the input end of the second optocoupler G2 through a second resistor R2 in series, the secondary output of the second current transformer B2 is connected to the input end of the first optocoupler G1 through a first resistor R1 in series, the emitter of the first optocoupler G1 is connected to GND through a third resistor R3, the emitter of the second optocoupler G2 is connected to GND through a fourth resistor R4, a fifth resistor R5 is connected between the emitters of the first optocoupler G1 and the second optocoupler G2, the input ends of the third optocoupler G3 and the fourth optocoupler G4 are connected in positive and negative cross and in parallel to the fifth resistor R5, one end of a sixth resistor R6 is connected in series with the collector of the output end of the third optocoupler G3, the emitter of the third optocoupler G3 is connected in series with the collector of the output end of the fourth optocoupler G4, the emitter of the output end of the fourth optical coupler G4 is connected with GND in series with a seventh resistor R7, the positive electrode of a first capacitor C1 is respectively connected with the emitter of the output end of a third optical coupler G3 and the collector of the output end of the fourth optical coupler G4, the negative electrode of the first capacitor C1 is respectively connected with the negative electrode of a first diode D1 and the positive electrode of a second diode D2, the negative electrode of the second diode D2 is connected with GND, the positive electrode of the first diode D1 is respectively connected with the negative electrode of a second capacitor C2 and one end of an eighth resistor R8, the collectors of the output ends of the first optical coupler G1 and the second optical coupler G2 are connected with 24V, the other end of a sixth resistor R6 is connected with 24V, the other end of the eighth resistor is connected with an output interface P1, and the output interface P1 is also connected with an I/O acquisition channel;
the phase failure detection module of the three-phase switch machine further comprises a three-phase power supply consisting of an A-phase power supply, a B-phase power supply and a C-phase power supply, wherein the A-phase power supply is directly connected to a first coil L1 of the three-phase switch machine motor M, the B-phase power supply is connected to a second coil L2 of the three-phase switch machine motor M through a first current transformer B1, and the C-phase power supply is connected to a third coil L3 of the three-phase switch machine motor M through a current transformer B2.
2. The phase failure detection module of a three-phase switch machine according to claim 1, wherein: the first current transformer B1 and the second current transformer B2 are TA0913-2M core-penetrating current transformers.
3. A method of using a phase failure detection module of a three-phase switch machine according to claim 1 or 2, comprising the steps of:
1) When three-phase currents generated by a three-phase power supply consisting of an A-phase power supply, a B-phase power supply and a C-phase power supply all rotate a three-phase turnout point machine motor M, secondary output ends of a first current transformer B1 and a second current transformer B2 output induced currents;
when the currents of the B-phase power supply and the C-phase power supply pass through the first current transformer B1 and the second current transformer B2, the first current transformer B1 and the second current transformer B2 respectively output an induction current, the phases of the induction current have 120-degree phase differences, the induction current is output after being isolated and shaped by the first optical coupler G1 and the second optical coupler G2, when the second optical coupler G2 outputs a high level, the third optical coupler G3 is opened, and when the first optical coupler G1 and the second optical coupler G2 both output a high level, the third optical coupler G3 and the fourth optical coupler G4 are closed; when the first optocoupler G1 outputs a high level, the fourth optocoupler G4 is turned on; the phase difference of input signals of the third optical coupler G3 and the fourth optical coupler G4 is 180 degrees, and the signals control the third optical coupler G3 and the fourth optical coupler G4 to be turned on and off in turn so as to charge and discharge the first capacitor C1; when the third optocoupler G3 is conducted, the first capacitor C1 is charged through the sixth resistor R6, the third optocoupler G3, the first capacitor C1 and the second diode D2, and when the third optocoupler G3 is turned off and the fourth optocoupler G4 is conducted, the seventh resistor R7, the fourth optocoupler G4, the first capacitor C1, the first diode D1 and the second capacitor C2 are discharged, at the moment, the charge on the first capacitor C1 is transferred to the second capacitor C2, a voltage is generated on the second capacitor C2, and a direct-current voltage signal is output through the output interface P1 for the control system to serve as a turnout action current and a phase failure check;
2) When the phase A power supply is absent in a three-phase power supply formed by the phase A power supply, the phase B power supply and the phase C power supply, the current generated by the phase B power supply returns to the phase C power supply through the first current transformer B1, the second coil L2, the third coil L3 and the second current transformer B2, and the phase of the same-name ends of the output currents of the first current transformer B1 and the second current transformer B2 is the same and is 0 degrees; after the first optical coupler G1 and the second optical coupler G2 are isolated and shaped, the output of the first optical coupler G1 and the output of the second optical coupler G2 are simultaneously output with high level or simultaneously output with low level, the input signals of the third optical coupler G3 and the fourth optical coupler G4 are low level, the third optical coupler G3 and the fourth optical coupler G4 cannot be conducted in turn, charge and discharge the first capacitor C1, and a0 voltage signal is output through the output interface P1;
3) When a B phase power supply is absent in a three-phase power supply consisting of an A phase power supply, a B phase power supply and a C phase power supply, only the second current transformer B2 in the first current transformer B1 and the second current transformer B2 outputs induction current, the first optocoupler G1 outputs pulse signals after being isolated and shaped by the first optocoupler G1 and the second optocoupler G2, the second optocoupler G2 outputs low level, the fourth optocoupler G4 only can discharge the first capacitor C1, the third optocoupler G3 can not finish charging the first capacitor C1, the first capacitor C1 can not finish alternating work of charging and discharging, and a0 voltage signal is output through an output interface P1;
4) When the C phase power is absent in a three-phase power supply consisting of an A-phase power supply, a B-phase power supply and a C-phase power supply, the first current transformer B1 and the second current transformer B2 only output induced currents through the first current transformer B1, the second optocoupler G2 outputs pulse signals after being isolated and shaped through the first optocoupler G1 and the second optocoupler G2, the first optocoupler G1 outputs low level, the third optocoupler G3 only can charge the first capacitor C1, the fourth optocoupler G4 cannot finish discharging the first capacitor C1, the first capacitor C1 cannot finish alternating work of charging and discharging, and a0 voltage signal is output through the output interface P1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2442435Y (en) * | 2000-09-01 | 2001-08-08 | 叶琳 | Motor prector only detecting two phase current |
| CN104865454A (en) * | 2014-01-15 | 2015-08-26 | 天津豪雅科技发展有限公司 | Three-phase power supply phase loss detection device |
| CN107380209A (en) * | 2017-08-10 | 2017-11-24 | 浙江众合科技股份有限公司 | For controlling the detection circuit of goat |
| CN208723537U (en) * | 2018-09-14 | 2019-04-09 | 北京安润通电子技术开发有限公司 | A kind of open phase detection module of three-phase point machine |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2442435Y (en) * | 2000-09-01 | 2001-08-08 | 叶琳 | Motor prector only detecting two phase current |
| CN104865454A (en) * | 2014-01-15 | 2015-08-26 | 天津豪雅科技发展有限公司 | Three-phase power supply phase loss detection device |
| CN107380209A (en) * | 2017-08-10 | 2017-11-24 | 浙江众合科技股份有限公司 | For controlling the detection circuit of goat |
| CN208723537U (en) * | 2018-09-14 | 2019-04-09 | 北京安润通电子技术开发有限公司 | A kind of open phase detection module of three-phase point machine |
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