CN212848108U - Hybrid contactor - Google Patents
Hybrid contactor Download PDFInfo
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- CN212848108U CN212848108U CN202021645851.9U CN202021645851U CN212848108U CN 212848108 U CN212848108 U CN 212848108U CN 202021645851 U CN202021645851 U CN 202021645851U CN 212848108 U CN212848108 U CN 212848108U
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Abstract
Hybrid contactor, based on power input signal control contactor contact and electronic switch design avoid the damage of big starting current to contactor contact when non-hindering nature or mixed characteristic load circular telegram in order to realize. The hybrid contactor comprises a contactor contact and a contactor coil which are linked, an electronic switch circuit connected with the contactor contact in parallel, a signal processing circuit and a contactor coil control circuit; the signal processing circuit is characterized in that the anode of the first diode is connected with a power supply, the cathode of the first diode is connected with the anode of the charging capacitor, and the cathode of the charging capacitor is grounded; one end of the first resistor is connected with the power supply, the other end of the first resistor is respectively connected with one end of the adjustable resistor and the negative input end of the comparator, and the other end of the adjustable resistor is grounded; the negative pole of first diode is connected the positive input end of comparator, and the VCC power connects the positive pole of comparator and second electric capacity respectively, and the negative pole ground connection of second electric capacity, the negative pole ground connection of comparator, the positive pole of second diode is connected to the output of comparator.
Description
Technical Field
The utility model relates to a hybrid contactor suitable for big starting current control belongs to electrical design technical field.
Background
At present, along with the rapid construction of domestic high-speed trains, various research technologies of motor train units are rapidly applied, electrical equipment is more complex, and the requirements on the performance and reliability of corresponding power supply equipment are further improved in order to meet the requirements on long-term reliable operation.
The non-resistive and hybrid characteristic loads of the conventional auxiliary power supply system of the railway vehicle are diversified, and in this case, the contactor serves as a remote control type second electronic switch and plays a role in switching the loads. When a load is started, the contactor can bear short-time and large current impact, so that the contact of the contactor can be irreversibly burnt, and the service life of the contactor is directly shortened. The contact burning loss of the existing contactor is further aggravated along with the increase of the service time due to the fact that the existing contactor cannot cope with the influence of large starting current, and therefore the potential safety hazard of a medium-voltage and low-voltage auxiliary power supply system is great.
In view of this, the present patent application is specifically proposed.
SUMMERY OF THE UTILITY MODEL
The hybrid contactor described herein, its design aim is to solve the problems existing in the above prior art and to provide a novel contactor design based on power input signal control contactor contacts and electronic switches to realize avoiding the damage of large starting current to contactor contacts when non-resistive or mixed characteristic load is powered on, and to realize starting load completely and reliably.
In order to achieve the design purpose, the hybrid contactor comprises a linked contactor contact and a contactor coil. The difference with the prior art is that the device also comprises an electronic switch circuit connected with the contactor contact in parallel, a signal processing circuit and a contactor coil control circuit;
in the signal processing circuit, the anode of the first diode is connected with the power supply, the cathode of the first diode is connected with the anode of the charging capacitor, and the cathode of the charging capacitor is grounded; one end of the first resistor is connected with the power supply, the other end of the first resistor is respectively connected with one end of the adjustable resistor and the negative input end of the comparator, and the other end of the adjustable resistor is grounded; the negative electrode of the first diode is connected with the positive electrode input end of the comparator, the VCC power supply is respectively connected with the comparator and the positive electrode of the second capacitor, the negative electrode of the second capacitor is grounded, the negative electrode of the comparator is grounded, and the output end of the comparator is connected with the positive electrode of the second diode;
in the electronic switch circuit, one end of a fourth resistor is connected with the output end of the comparator, the other end of the fourth resistor is respectively connected with the control end of the second electronic switch and one end of a fifth resistor, the other end of the fifth resistor is connected with the anode of a third diode, and the cathode of the third diode is connected with the input end of the second electronic switch;
the contactor coil control circuit is characterized in that a delay resistor and a delay capacitor are connected in parallel, the negative electrode of a second diode is connected with one end of the delay resistor and one end of the delay capacitor, and the other ends of the delay resistor and the delay capacitor are respectively connected with a control signal and a control end of a second electronic switch; the coil power supply is connected with the input end of the contactor coil, the output end of the contactor coil is connected with the input end of the second electronic switch, and the output end of the second electronic switch is grounded; the connection point of the control signal, the delay resistor, the delay capacitor and the control end of the second electronic switch is a second input end.
Furthermore, the contactor contact adopts a wiring structure with three groups of contacts connected in series; the power is connected with the input ends of the contactor contacts, three groups of contacts in the contactor contacts are connected end to end, and the output ends of the contactor contacts are connected with a load.
As described above, the hybrid contactor of the present application has the following advantages and advantageous effects:
1. the contactor has the advantages that burning loss of a contactor contact caused by large starting current is avoided under non-resistive and mixed characteristic load environments, the service life of the contactor is prolonged, and the application range of the contactor is widened.
2. The hybrid contactor has the advantages that the signal end can be controlled, the hierarchical control capability is realized, and a system applying the hybrid contactor has excellent expandability and higher priority control performance.
Drawings
The present invention will now be further described with reference to the following drawings;
FIG. 1 is a schematic diagram of a circuit configuration of a prior art contactor;
FIG. 2 is a schematic circuit diagram of a hybrid contactor according to the present application;
in the above figure, the coil power supply 1, the control signal 2, the power supply 3, the contactor contact 4, the load 5, the contactor coil 6, the second electronic switch 7, the first electronic switch 8, the charging capacitor C1, the second capacitor C2, the first diode D1, the second diode D2, the first resistor R1, the delay resistor R3, the delay capacitor C3, the adjustable resistor R2, the fourth resistor R4, the fifth resistor R5, the third diode D3, and the comparator M are included.
Detailed Description
In example 1, as shown in fig. 1, a contactor generally used in the related art includes a contactor contact 4 and a contactor coil 6 which are interlocked.
As shown in fig. 2, the hybrid contactor proposed in the present application is different from the prior art in that it further includes an electronic switching circuit connected in parallel with the contactor contact 4, and a signal processing circuit and a contactor coil control circuit.
In order to improve the current carrying capacity of the contactor, the contactor contact 4 adopts a wiring mode that three groups of contacts are connected in parallel. The power supply 3 is connected with the input end of the contactor contact 4, three groups of contacts in the contactor contact 4 are connected in parallel, and the output end of the contactor contact 4 is connected with the load 5;
the signal processing circuit is used for controlling the starting voltage of the first electronic switch 8. By adjusting the second resistor R2, the start voltage can be set, and when the voltage at the positive input terminal of the comparator M is greater than that at the negative input terminal of the comparator M, the output terminal of the comparator M can output a high level. Specifically, the positive electrode of the first diode D1 is connected to the power supply 3, the negative electrode of the first diode D1 is connected to the positive electrode of the charging capacitor C1, and the negative electrode of the charging capacitor C1 is grounded; one end of the first resistor R1 is connected with the power supply 3, the other end of the first resistor R1 is respectively connected with one end of the adjustable resistor R2 and the negative input end of the comparator M, and the other end of the adjustable resistor R2 is grounded; the negative electrode of the first diode D1 is connected with the positive electrode input end of the comparator M, the VCC power supply is respectively connected with the positive electrodes of the comparator M and the second capacitor C2, the negative electrode of the second capacitor C2 is grounded, the negative electrode of the comparator M is grounded, and the output end of the comparator M is connected with the positive electrode of the second diode D2.
The electronic switch circuit is used for enabling a large starting current to reach a load through the first electronic switch 8 when the load is started, and the current does not pass through the contactor contact 4, so that the damage of the current to the contactor contact 4 is avoided; on the other hand, after the contactor contact 4 is closed, the first electronic switch 8 can be opened. Specifically, one end of the fourth resistor R4 is connected to the output end of the comparator M, and the other end thereof is connected to the control end of the second electronic switch 8 and one end of the fifth resistor R5, respectively, the other end of the fifth resistor R5 is connected to the anode of the third diode D3, and the cathode of the third diode D3 is connected to the input end of the second electronic switch 8;
the contactor coil control circuit is used for providing control signals to the contactor coil 6 in a delayed mode so as to control the power-on and power-off states of the contactor coil, and comprises a second diode D2, a delay resistor R3, a delay capacitor C3, a control signal 2, a second electronic switch 7 and the contactor coil 6. Specifically, the delay resistor R3 and the delay capacitor C3 are connected in parallel, the negative electrode of the second diode D2 is connected to one end of the delay resistor R3 and one end of the delay capacitor C3, and the other ends of the delay resistor R3 and the delay capacitor C3 are respectively connected to the control signal 2 and the control end of the second electronic switch 7; the coil power supply 1 is connected with the input end of the contactor coil 6, the output end of the contactor coil 6 is connected with the input end of the second electronic switch 7, and the output end of the second electronic switch 7 is grounded; the connection point of the control signal 2, the delay resistor R3, the delay capacitor C3 and the control end of the second electronic switch 7 is a second input end, and the second electronic switch 7 can be controlled to be started only when the second input end is valid.
Based on the hybrid contactor suitable for large starting current, the application provides the following control process of non-resistive or hybrid characteristic load power-on starting:
initially, setting an adjustable resistor R2, wherein the coil power supply 1 is effective without a control signal 2;
when the power supply is started, the power supply 3 starts to supply power, the charging capacitor C1 starts to charge, and the voltage of the positive electrode of the comparator M is continuously increased;
when the voltage of the positive electrode of the comparator M is greater than the voltage of the connection point of the adjustable resistor R2 and the first resistor R1, the comparator M outputs effective voltage, a voltage signal reaches the control end of the first electronic switch 8 through the fourth resistor, the input end and the output end of the first electronic switch 8 are conducted, the power supply 3 is effectively conducted with the load 5, the voltage signal simultaneously reaches the delay resistor R3 and the delay capacitor C3 through the second diode D2, a delay circuit formed by the delay resistor R3 and the delay capacitor C3 is started to delay, after the delay is completed, the signals of the connection point of the delay resistor R3 and the delay capacitor C3 and the control end of the second electronic switch 7 are effective, the input end and the output end of the second electronic switch 7 are conducted, the current of the coil power supply 1 is grounded through the contactor coil 6, the contactor coil 6 is electrified and is linked with the contactor contact 4 to be closed, the voltage of the input end of the second electronic switch, the voltage of the first electronic switch 8 reaches the input end of the second electronic switch through a fifth resistor and a third diode D3, the voltage of the input end of the first electronic switch 8 is low level, and the input end and the output end are disconnected; by setting the control signal 2 to be high level, the coil 6 of the contactor can be controlled to be electrified, so that the contact 4 of the contactor is switched on; by setting the adjustable resistor R2, the contactor can be switched on in different voltage states, that is, the contactor contact 4 is started when the input voltage is low.
When the contactor is turned off, the coil power supply 1 is set to be at a low level, so that the contactor coil 6 can be powered off, the contactor contact 4 is disconnected, and meanwhile, the second electronic switch 8 is turned off, and the load is powered off; when the power supply 3 is in a low voltage state, the signal comparison circuit outputs an invalid voltage, the contactor coil control circuit inputs the invalid voltage, the contactor coil 6 can be powered off, the contactor contact 4 is disconnected, meanwhile, the second electronic switch 8 has no effective input, the input end and the output end of the second electronic switch are disconnected, and the load is powered off.
Similar technical solutions can be derived from the solutions given in the figures and the description, as described above. However, any content of the technical solution not departing from the present invention still belongs to the right scope of the technical solution of the present invention.
Claims (2)
1. The utility model provides a hybrid contactor, includes contactor contact and the contactor coil of linkage, its characterized in that: the contactor also comprises an electronic switch circuit connected with the contactor contact in parallel, a signal processing circuit and a contactor coil control circuit;
in the signal processing circuit, the anode of the first diode is connected with the power supply, the cathode of the first diode is connected with the anode of the charging capacitor, and the cathode of the charging capacitor is grounded; one end of the first resistor is connected with the power supply, the other end of the first resistor is respectively connected with one end of the adjustable resistor and the negative input end of the comparator, and the other end of the adjustable resistor is grounded; the negative electrode of the first diode is connected with the positive electrode input end of the comparator, the VCC power supply is respectively connected with the comparator and the positive electrode of the second capacitor, the negative electrode of the second capacitor is grounded, the negative electrode of the comparator is grounded, and the output end of the comparator is connected with the positive electrode of the second diode;
in the electronic switch circuit, one end of a fourth resistor is connected with the output end of the comparator, the other end of the fourth resistor is respectively connected with the control end of the second electronic switch and one end of a fifth resistor, the other end of the fifth resistor is connected with the anode of a third diode, and the cathode of the third diode is connected with the input end of the second electronic switch;
the contactor coil control circuit is characterized in that a delay resistor and a delay capacitor are connected in parallel, the negative electrode of a second diode is connected with one end of the delay resistor and one end of the delay capacitor, and the other ends of the delay resistor and the delay capacitor are respectively connected with a control signal and a control end of a second electronic switch; the coil power supply is connected with the input end of the contactor coil, the output end of the contactor coil is connected with the input end of the second electronic switch, and the output end of the second electronic switch is grounded; the connection point of the control signal, the delay resistor, the delay capacitor and the control end of the second electronic switch is a second input end.
2. The hybrid contactor as claimed in claim 1, wherein: the contactor contact adopts a wiring structure with three groups of contacts connected in series;
the power is connected with the input ends of the contactor contacts, three groups of contacts in the contactor contacts are connected end to end, and the output ends of the contactor contacts are connected with a load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021645851.9U CN212848108U (en) | 2020-08-10 | 2020-08-10 | Hybrid contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021645851.9U CN212848108U (en) | 2020-08-10 | 2020-08-10 | Hybrid contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212848108U true CN212848108U (en) | 2021-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021645851.9U Active CN212848108U (en) | 2020-08-10 | 2020-08-10 | Hybrid contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212848108U (en) |
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2020
- 2020-08-10 CN CN202021645851.9U patent/CN212848108U/en active Active
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Address after: No.86, Jinhong East Road, Chengyang District, Qingdao City, Shandong Province Patentee after: Qingdao Sifang Alstom railway transportation equipment Co.,Ltd. Address before: No.86, Jinhong East Road, Chengyang District, Qingdao City, Shandong Province 266111 Patentee before: BOMBARDIER SIFANG (QINGDAO) TRANSPORTATION Ltd. |