CN209913737U - Intelligent magnetic starter - Google Patents
Intelligent magnetic starter Download PDFInfo
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- CN209913737U CN209913737U CN201920983380.3U CN201920983380U CN209913737U CN 209913737 U CN209913737 U CN 209913737U CN 201920983380 U CN201920983380 U CN 201920983380U CN 209913737 U CN209913737 U CN 209913737U
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- protection device
- magnetic starter
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Abstract
The utility model provides an intelligent magnetic starter, protection device adopt the digital design of intelligence, special intelligent chip to concrete link circuit before main circuit, control circuit and protector has carried out the design, very big improvement protection device's interference killing feature and operational capability, the precision and the reliability that make the protection action have a qualitative promotion, avoid arousing equipment outage and the preparation damage that the trouble does not move and arouse because of the maloperation. And simultaneously the utility model discloses can realize supervisory control, data record and reliable protection, keep apart power failure and do resistance. The system can perform constant value setting, data recording and fault query in a power failure state, has a low-power-consumption management function, and can realize multiple protection functions of accurate short circuit, overload, phase failure, three-phase imbalance, electric leakage, overvoltage, undervoltage and the like.
Description
Technical Field
The utility model relates to a magnetic starter field, concretely relates to intelligent magnetic starter.
Background
The core component motor protector of the magnetic starter used in the underground coal mine at present is mostly a JDB and ABD8 series product, the series protection device is a discrete element and an analog circuit, the function of the series protection device is single, the existing magnetic starter is difficult to realize the reliable protection of the motor, the existing starter is generally only provided with a starting button and a stopping button, the function of the starter is single, the starter can not be well applied to different occasions, and the requirements for multiple functions of the starter can not be met. Present starter is mostly circular structure simultaneously, and the consideration of out the anti-riot grade can't set up the observation window, and this operation data that just leads to operating personnel can not real-time observation device is unfavorable for the control to the device.
In order to solve the above problems, people are always seeking an ideal technical solution.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to prior art's not enough to a intelligent magnetic starter is provided, concrete scheme is as follows:
an intelligent magnetic starter comprises a main circuit, a control circuit and a protection device; the input end of the main circuit is connected with a power supply, and the output end of the main circuit is connected with a motor; the main circuit is connected with the control circuit through a transformer; the main circuit is connected with the protection device through a current transformer;
the transformer comprises a first secondary side and a second secondary side, and the control circuit comprises a first control branch circuit and a second control branch circuit; the first secondary side is connected with the protection device and is also connected with a first control branch circuit through an intrinsic safety relay; the second secondary side is connected with a second control branch circuit; the first control branch comprises a second switch and an eighth switch which are connected with the intrinsic safety relay;
the second switch is connected with a first pin of a double-pin position change-over switch through a first internal contact of the protection device, the first pin comprises a first remote control end and a first near control end, the eighth switch is connected with a second pin of the double-pin position change-over switch, and the second pin comprises a second remote control end and a second near control end; the first remote control end is connected with the first output end of the first control branch, and the first near control end is connected with the second output end of the first control branch through a first switch; the second near control end is connected with the second output end through a backward diode, and the second far control end is connected with the third output end of the first control branch circuit; the first internal contact is connected with the second output end through a normally open contact of the first contactor and a second internal contact of the protection device respectively;
the second control branch comprises a ninth switch linked with the eighth switch, the ninth switch is connected with two branch branches arranged in parallel, and the first branch comprises a first relay coil and an internal contact of the intrinsic safety relay; the second branch comprises a normally open contact of the first relay and a first contactor coil.
Further, a main contact of the first contactor is arranged on the main circuit; and a reversing switch for changing the output phase sequence of the main circuit is arranged on the upstream of the primary side of the transformer on the main circuit.
Furthermore, a resistance-capacitance absorption unit is further arranged on the main circuit.
Furthermore, the main circuit comprises a three-phase circuit, wherein any one phase of circuit is respectively connected with the protection device and a third switch through a normally closed contact of a first contactor and a normally closed contact of a first relay, and the third switch is grounded.
Furthermore, the first output end of the first control branch is connected with the third output end of the first control branch through a ninth switch and a tenth switch so as to form a loop; and the second output end of the first control branch circuit is connected with the middle positions of the ninth switch and the tenth switch.
Furthermore, the protection device is connected with a display screen.
Furthermore, the magnetic starter also comprises a square shell, wherein a shift switch, a reset switch, a determination switch and a short-circuit test switch are arranged on the square shell, and the shift switch, the reset switch, the determination switch and the short-circuit test switch are connected with the protection device.
The utility model discloses relative prior art has outstanding substantive characteristics and the progress that is showing, specifically speaking, the utility model has the following advantages:
the utility model discloses main circuit, control circuit to in the starter have designed, through the joint control to each switch in these circuits, can not only realize starting, the stop control of motor, still can carry out operations such as electric leakage block test, short circuit test to the starter, can discover the problem that probably appears in the starter operation and in time troubleshooting through these operations, have richened the function of starter, have increased magnetic starter's stability.
Meanwhile, the starter of the utility model adopts the design of a square shell structure, so that the explosion-proof performance and the space utilization rate of the magnetic starter are improved qualitatively, and the problems of low explosion-proof grade, low space utilization rate and difficulty in arranging a display screen of the existing spherical shell are solved; the running data and the fault state of the protector can be observed visually through the arranged display, so that an operator can master the running condition of the starter in real time, and the running safety of the magnetic starter is improved.
Drawings
Fig. 1 is an electrical schematic diagram of an embodiment of the invention;
fig. 2 is an electrical schematic diagram 1 of a remote control according to an embodiment of the present invention;
fig. 3 is an electrical schematic diagram 2 of a remote control according to an embodiment of the present invention;
fig. 4 is a front view of a starter in an embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Starter embodiment
As shown in fig. 1, the intelligent magnetic starter in this embodiment includes a main circuit, a control circuit and a protection device, wherein the input terminals X1, X2 and X3 of the main circuit are connected to a power supply, the output terminals D1, D2 and D3 of the main circuit are connected to a motor M, the main circuit is provided with main contacts KM-0 and KM-0 of a vacuum contactor KM for switching on and off the circuit, and a coil operating voltage is provided by a control transformer to control the main contact and the auxiliary contact of the vacuum contactor KM to operate.
The main circuit is connected with the control circuit through a transformer TB1, an isolation reversing switch GHK for changing the output phase sequence of the main circuit is arranged at the upstream of the primary side of the transformer TB1, the isolation reversing switch GHK is used for isolating the main circuit and changing the phase sequence of a power supply under the condition of no load, and under the condition of a fault, the energy band load is switched off, so that high breaking power is achieved. The main circuit is connected with a protection device through a current transformer LH, and the protection device adopts a ZBHSZ-C/1140 protector in the embodiment.
The transformer TB1 comprises a first secondary side and a second secondary side, and the control circuit comprises a first control branch and a second control branch; the first secondary side is provided with a fuse FU2 and is connected with the power supply input end of the protection device through a fuse FU4, the first secondary side is also connected with a first control branch circuit through an intrinsic safety relay XJ, and the intrinsic safety relay XJ is used as an intrinsic safety type pilot loop; the second secondary side is provided with a fuse FU3 and is connected with a second control branch; the first control branch comprises a switch SB2 and a switch SB8 which are respectively connected with the A1 end and the B1 end of the intrinsic safety relay.
The switch SB2 is connected to a first pin of the two-pin transfer switch SA through internal contacts K01 and K1K of the protection device, the first pin includes a first remote control end and a first near control end, the switch SB8 is connected to a second pin of the two-pin transfer switch SA, the second pin includes a second remote control end and a second near control end, as shown in fig. 1, the two-pin transfer switch SA controls the movement of the knife switches on the two pins by operating a key, so as to realize the selection of the remote control end and the near control end, in other embodiments, two single-pole double-throw switches can be selected to replace the two-pin transfer switch; the first remote control end is connected with the output end K1 of the first control branch circuit, and the first near control end is connected with the output end K2 of the first control branch circuit through a switch SB 1; the second near control end is connected with the output end K2 through a backward diode D1, and the second far control end is connected with the output end K3 of the first control branch circuit; the internal contact K1K is connected with the output end K2 through a normally open contact KM-1 of the contactor KM and internal contacts K02 and K2K of the protection device respectively.
The second control branch comprises a switch SB9 linked with a switch SB8, the switch SB9 is connected with two branch branches arranged in parallel, and the first branch comprises a coil of a relay ZJ and internal contacts A8 and B8 of an intrinsic safety relay XJ; the second branch comprises a normally open contact ZJ-1 of the relay ZJ and a coil of the contactor KM.
The main circuit is also provided with a resistance-capacitance absorption unit ZR which is used for absorbing and consuming self-induced electromotive force generated by an inductive load when the circuit is disconnected and preventing the insulation breakdown of the load caused by overvoltage.
The main circuit is a three-phase circuit, wherein any one phase (X3 in the embodiment) of the circuit is respectively connected with the protection device and a switch SB3 through a normally closed contact KM-3 of a contactor KM and a normally closed contact ZJ-2 of a relay ZJ, and the switch SB3 is grounded through a resistor R1.
In the electrical schematic diagram shown in fig. 1, when alternating current is applied to the primary winding of the transformer TB1, an alternating magnetic field is generated by the transformer core, and an induced electromotive force is generated by the secondary winding to provide a stable power supply for the control loop. The double-pin position conversion switch SA realizes the remote control and near control functions of the starter through the first pin position and the second pin position.
As shown in fig. 1, a short-circuit test switch SB4, a determination switch SB5, a reset switch SB6, and a shift switch SB7 are further provided on the protection device zbhsz-C/1140, and a normally open contact KM-2 of a contactor KM is provided as a closing signal switch on the protection device.
As shown in fig. 2, the output terminal K1 of the first control branch is connected to the output terminal K3 of the first control branch through a switch SB9, a switch SB10 and a diode D2 to form a loop; the output terminal K2 of the first control branch is connected to the middle position of the switch SB9 and the switch SB 10. As shown in fig. 3, which is an electrical schematic diagram of the relay ZJ and the contactor KM of the present embodiment in which the normally open contact or the normally closed contact is connected to the remote control terminal, in the diagram, K9 to K15 are connected to the remote control terminal, so that the working conditions of the relay and the contactor are sent to the remote control terminal, and the remote control terminal obtains the working state of the starter.
The starter in this embodiment is provided with a square housing, and as shown in fig. 4, a front view of the starter is shown, and the housing of the starter is provided with keys such as a forward rotation switch, a reverse rotation switch, a stop switch, a reset switch, a confirmation switch, a shift switch, and a test switch, for example, the isolating switch GHK in fig. 1 corresponds to the forward rotation switch and the reverse rotation switch on the housing. The magnetic starter adopts the design of square shell structure, very big improvement the explosion-proof performance and the space utilization of the magnetic starter of protector, make the explosion-proof performance and the space utilization of magnetic starter have a qualitative promotion, solved the spherical structure casing and reduced explosion-proof structural performance and space use-less problem because of increasing the observation window.
Still be provided with the display screen of being connected with protection device on the starter, as shown in 1 in fig. 4, through the display, very big improvement the visibility of device, but the operational data and the fault condition of visual observation protector make operating personnel master the starter operational aspect in real time, have increased the security that magnetic starter moved.
The operation principle of the starter comprises the following steps:
according to the requirement of the motor running direction, the magnetic starter in the embodiment closes the isolating and reversing switch GHK, a power supply is connected to a primary side (primary side) of the transformer to obtain electricity, two ends of a secondary side (secondary side) output 36V alternating current, so that the intrinsic safety relay XJ and the protection device ZB are obtained, and the leakage detection starts. The magnetic starter can be tested for leakage lockout by pressing the leakage test button SB 3.
When the main loop meets the requirement of the ground insulation resistance, K01-K1K on a protection device ZB is attracted, a toggle switch SA is arranged at a near control position, a start button SB1 is pressed, A8-B8 contacts on an intrinsically safe relay XJ are attracted, a relay ZJ coil is electrified, a ZJ normally open contact ZJ-1 is attracted, a vacuum contactor KM coil is electrified, a vacuum contactor KM main contact KM-0 is attracted, and a vacuum contactor normally open contact KM-1 is attracted, so that a self-locking loop is formed.
The ZB interface of the protection device can be operated by pressing the determination switch SB5, the shift switch SB7, and the reset switch SB 6. The short-circuit test operation can be performed on the magnetic starter by pressing the button of the short-circuit switch SB 4.
The current transformer LH transmits detected three-phase current signals to the protector ZB, and if faults such as short circuit, overload, three-phase imbalance or phase failure occur in the operation process, K01-K1K on the protector ZB are released, the coil of the relay ZJ loses power, the coil of the vacuum contactor KM loses power, and the main contact is released. And a corresponding fault is displayed on the protector ZB. When the fault is eliminated, the reset switch SB6 button is pressed, and the normal operation can be realized.
When a stop button SB2 is pressed, the A8-B8 contact on the intrinsically safe relay XJ is released, the coil of the relay ZJ is powered off, the coil of the vacuum contactor KM is powered off, and the main contact is released. When the toggle switch SA is arranged at a remote control position, the remote control operation can be carried out on the magnetic starter.
The magnetic starter realizes operations such as real-time monitoring, remote setting, remote control and the like through RS485 communication, and realizes monitoring of the mine bottommost equipment.
The utility model provides a protector ZB is with 32 bit singlechips as the core, assists with the peripheral chip of industrial grade to and scientific algorithm, the protection is reliable sensitive, and measurement accuracy is high. And various anti-interference measures are adopted, so that the device has extremely high anti-interference capability. In the design of the device, standardized and modularized hardware design, high-precision A/D conversion, a special power supply module and crystal timing are adopted. On the user interface, large-screen liquid crystal Chinese display, automatic backlight and menu type operation indication are adopted, and the occurrence of misoperation is effectively prevented for important operation authorization passwords. The protector stores a set of fixed values, can be inquired and modified on line, and has the functions of event sequence recording, event, remote measurement, remote signaling, remote regulation, remote control and the like. The chip has a complete self-checking function, and the fault is positioned to the main chip.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (7)
1. An intelligent magnetic starter, characterized by: the device comprises a main circuit, a control circuit and a protection device; the input end of the main circuit is connected with a power supply, and the output end of the main circuit is connected with a motor; the main circuit is connected with the control circuit through a transformer; the main circuit is connected with the protection device through a current transformer;
the transformer comprises a first secondary side and a second secondary side, and the control circuit comprises a first control branch circuit and a second control branch circuit; the first secondary side is connected with the protection device and is also connected with a first control branch circuit through an intrinsic safety relay; the second secondary side is connected with a second control branch circuit; the first control branch comprises a second switch and an eighth switch which are connected with the intrinsic safety relay;
the second switch is connected with a first pin of a double-pin position change-over switch through a first internal contact of the protection device, the first pin comprises a first remote control end and a first near control end, the eighth switch is connected with a second pin of the double-pin position change-over switch, and the second pin comprises a second remote control end and a second near control end; the first remote control end is connected with the first output end of the first control branch, and the first near control end is connected with the second output end of the first control branch through a first switch; the second near control end is connected with the second output end through a backward diode, and the second far control end is connected with the third output end of the first control branch circuit; the first internal contact is connected with the second output end through a normally open contact of the first contactor and a second internal contact of the protection device respectively;
the second control branch comprises a ninth switch linked with the eighth switch, the ninth switch is connected with two branch branches arranged in parallel, and the first branch comprises a first relay coil and an internal contact of the intrinsic safety relay; the second branch comprises a normally open contact of the first relay and a first contactor coil.
2. The intelligent magnetic starter of claim 1, wherein: the main circuit is provided with a main contact of the first contactor; and a reversing switch for changing the output phase sequence of the main circuit is arranged on the upstream of the primary side of the transformer on the main circuit.
3. The intelligent magnetic starter of claim 1 or 2, wherein: and the main circuit is also provided with a resistance-capacitance absorption unit.
4. The intelligent magnetic starter of claim 3, wherein: the main circuit comprises a three-phase circuit, wherein any one phase of circuit is respectively connected with the protection device and a third switch through a normally closed contact of a first contactor and a normally closed contact of a first relay, and the third switch is grounded.
5. The intelligent magnetic starter of claim 4, wherein: the first output end of the first control branch circuit is connected with the third output end of the first control branch circuit through a ninth switch and a tenth switch so as to form a loop; and the second output end of the first control branch circuit is connected with the middle positions of the ninth switch and the tenth switch.
6. The intelligent magnetic starter of claim 5, wherein: the protection device is connected with a display screen.
7. The intelligent magnetic starter of claim 6, wherein: the magnetic starter also comprises a square shell, wherein a shift switch, a reset switch, a determination switch and a short-circuit test switch are arranged on the square shell, and the shift switch, the reset switch, the determination switch and the short-circuit test switch are connected with the protection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920983380.3U CN209913737U (en) | 2019-06-27 | 2019-06-27 | Intelligent magnetic starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920983380.3U CN209913737U (en) | 2019-06-27 | 2019-06-27 | Intelligent magnetic starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209913737U true CN209913737U (en) | 2020-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920983380.3U Active CN209913737U (en) | 2019-06-27 | 2019-06-27 | Intelligent magnetic starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209913737U (en) |
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2019
- 2019-06-27 CN CN201920983380.3U patent/CN209913737U/en active Active
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