CN201286009Y - Vacuum electromagnetic starter for speed governing flame proof dual speed motor for mining - Google Patents
Vacuum electromagnetic starter for speed governing flame proof dual speed motor for mining Download PDFInfo
- Publication number
- CN201286009Y CN201286009Y CNU2008200320048U CN200820032004U CN201286009Y CN 201286009 Y CN201286009 Y CN 201286009Y CN U2008200320048 U CNU2008200320048 U CN U2008200320048U CN 200820032004 U CN200820032004 U CN 200820032004U CN 201286009 Y CN201286009 Y CN 201286009Y
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- speed
- motor
- vacuum
- jdb
- electromagnetic starter
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The utility model discloses a speed-adjusting vacuum electromagnetic starter used for a mining flameproof two-speed motor, which belongs to mining electrical devices. A current detecting and switching control circuit is formed by a microcomputer and a working current sampling instrument. When load current is larger than the setting value of a switching unit (from minimum to maximum), a relay in the switching unit is released, the relay sucks the contact thereof to close, and a vacuum AC contactor sucks an electric motor to rotate in the rated power and the rated speed; and when the load current is smaller than the setting value of the switching unit (from maximum to minimum), the other relay in the switching unit is released, the electric motor is back to the starting state and rotates in a low speed. The speed-adjusting vacuum electromagnetic starter has the advantages that a belt conveyor is started and operates in the rated power when conveying coal and started and operates in a low power and low speed when conveying no coal, so the service life of the belt conveyor is prolonged, and the electric power is saved.
Description
Technical field
The utility model relates to a kind of mining electric equipment, specifically is a kind of flame-proof mine double-speed motor speed governing vacuum electromagnetic starter.
Background technology
At present, defeated coal ribbon conveyer under the coal mine turns round after mostly being unlatching greatly always.Do not stop transport during no coal on the conveyer yet, cause the idle wearing and tearing of high speed of belt and carrying roller, greatly reduce the useful life of ribbon conveyer, and cause power wastage.For addressing the above problem, select the drive motors of two-speed motor for use as ribbon conveyer, when coal is arranged, starting and running under rated power; During no coal, starting and running under small-power low speed, thus prolonged useful life of ribbon conveyer, and saved electric power.But existing flame-proof mine vacuum electromagnetic starter only is suitable for and single speed motor, i.e. the two-speed motor control appliance that does not also match with the two-speed motor ribbon conveyer.
Summary of the invention
The purpose of this utility model provides a kind of flame-proof mine double-speed motor speed governing vacuum electromagnetic starter, realizes the automatic control of two-speed motor belt conveying motor speed.
The technical solution of the utility model is as follows: it comprises microcomputer-C, control circuit, it is characterized in that the operating current sampling sensor-LC that is connected with microcomputer-C and relay K 1, K2 form current detecting and switching circuit, it also comprises and is connected two AC vacuum contactor CKJ that are used for switching on and off two windings of double-speed motor with switching circuit
1, CKJ
2Be used for realizing two comprehensive protector of motor JDB of overload, the phase failure, short circuit and the earth leakage search/lockout protection of main motor branch road
1, JDB
2, the superpotential capacitance-resistance absorption plant RC that produces when being used for suppressing vacuum A.C. contactor on-off circuit; Its annexation is: two AC vacuum contactor CKJ
1, CKJ
2Parallel connection is connected two comprehensive protector of motor JDB with switching circuit
1, JDB
2Respectively with two AC vacuum contactor CKJ
1, CKJ
2Connect, at two comprehensive protector of motor JDB
1, JDB
2Output capacitance-resistance absorption plant RC respectively is housed.
Microcomputer-C adopts single-chip microcomputer.
Good effect of the present utility model is: the speed governing of flame-proof mine double-speed motor realizes ribbon conveyer when coal is arranged automatically with vacuum electromagnetic starter, starting and running under rated power; During no coal, starting and running under small-power low speed, thus prolonged useful life of ribbon conveyer, and saved electric power.
Description of drawings
Accompanying drawing is the utility model circuit diagram.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
As shown in drawings, the electromagnetic starter circuit is made up of following device:
Two AC vacuum contactor CKJ
1, CKJ
2, all select CKJ5-1251140V/125A for use, suction coil :～36V---be used for switching on and off the motor of being controlled.
Two comprehensive protector of motor JDB
1, JDB
2, all select JDB-80A for use---be used for realizing overload, the phase failure, short circuit and the earth leakage search/lockout protection of main motor branch road.
Each one of auxiliary relay QJ, J1, J2, JZ
20-1122660V/16A, suction coil :～36V---be used for controlling the break-make of vacuum contactor coil.
Microcomputer-C: adopt single-chip microcomputer, select integrated package AT89C52 for use, small-sized DC relay K I, K2 and operating current sampling sensor-LC is set in the single-chip microcomputer forms motor power circuit sampling and automatic switchover.The motor working current signal is passed to microcomputer at any time, to realize switching the high, low speed operational mode according to the size of motor load electric current.
Fuse RD:RL1-15500V/2A---as the short-circuit protection of control transformer and control loop.
Connecting terminal block: 660V/10A---be used for changing the input voltage of control transformer BK.
Toggle switch JK---when this switch disconnects, be the microcomputer automatic control operating state; During connection, be the manual-operated emergent operating state.
Double-throw toggle switch ZK---nearly control and control change over switch far away.
Isolate reversing switch HK:DH2-7-125660V/125A---be used for insulating power supply and commutation and use.
Transformer BK:BK-100660V (380V)/36V100VA---the safe voltage of 36V is provided for control loop.
Capacitance-resistance absorption plant RC: by capacitor C J40-10.47 μ F/1000V and resistance R X
1-10W 100 Ω ± 5%, resistance R J1W 1M5J form---the overvoltage that produces when being used for suppressing vacuum A.C. contactor on-off circuit.
Start-stop push button S1, S2: each 1, LX
1-11K 500V/6A---be used for starting and shut-down operation.
Present embodiment is provided with nearly control and control far away, and nearly control i.e. control on the spot, the ZK switch is turned to " nearly control ", and 2 and 9 terminal ground connection of ZK switch are realized nearly control.The ZK switch is turned to " control far away ", with ZK switch 9 ground connection, 1 and 2 connect starting button realizes far distance controlled.
Operation principle and process are as follows:
1. starting
Isolating switch-the HK that closes, the secondary generation 36V of control transformer voltage, the switching circuit of microcomputer has electricity and locates initial condition, its K1 junction closure; Comprehensive protector of motor JDB1 and JDB2 insulation against ground detect; (the exhausted over the ground resistance of 380V motor is greater than 7+1.4K Ω if resistance meets the requirements over the ground; the exhausted over the ground resistance of 660V motor is greater than 22+4.4K Ω) the execution relay tip closure of JDB integrated protection then; when pressing starting button-S2; can make auxiliary relay-QJ get electric its normally opened contact closure; make auxiliary relay-J1 get electric its normally opened contact closure, vacuum A.C. contactor-CKJ1 adhesive makes motor small-power slow-speed of revolution running.When load current during, keep starting state, motor small-power slow-speed of revolution running less than the set point of switching device shifter always.
If toggle switch-and JK connects, and is the manual-operated emergent operating state, and motor can not speed governing, and double-speed motor can only be in starting operation under the rated power.
2. switch
The current detecting switching controls loop of forming by microcomputer-C and operating current sampler-LC.When load current during greater than (little to big) set point of switching device shifter, in the switching device shifter-release of K1 relay, its closing of contact of-K2 relay adhesive, make auxiliary relay-J2 get electric its normally opened contact closure, vacuum A.C. contactor-CKJ2 adhesive motor turns round under the rated power rated speed.When load current during less than (arriving little greatly) set point of switching device shifter, in the switching device shifter-the K2 relay discharges, and its closing of contact of-K1 relay adhesive is got back to starting state.Vacuum A.C. contactor-CKJ1 and-reliable electric blocking and mechanical latching are reliably arranged between the CKJ2, guarantees two vacuum A.C. contactor-CKJ1 and-CKJ2 can not be simultaneously electric adhesive.
3. stop
When pressing stop button-S1, its normally opened contact of-QJ coil blackout disconnects, vacuum A.C. contactor-CKJ1 or-the CKJ2 coil blackout, under the effect of spring mechanical counter-force, the disjunction of vacuum A.C. contactor main contact, major loop outage.
The execution relay adhesive of comprehensive protector of motor under normal circumstances, its normally opened contact-JDB closure, major loop operate as normal; When breaking down (overload, the phase failure and short circuit), to carry out relay and discharge, vacuum A.C. contactor outage major loop is cut off; When major loop had electric leakage, carrying out relay can not adhesive, the fail to start of double speed control switch.
Above-mentioned vacuum electromagnetic starter is contained in the flameproof enclosure.
Claims (3)
1, a kind of flame-proof mine double-speed motor speed governing vacuum electromagnetic starter, it comprises microcomputer-C, control circuit, it is characterized in that the operating current sampling sensor-LC that is connected with microcomputer-C and relay K 1, K2 form the current detecting switching circuit, it also comprises and is connected two AC vacuum contactor CKJ that are used for switching on and off two windings of double-speed motor with switching circuit
1, CKJ
2Be used for realizing two comprehensive protector of motor JDB of overload, the phase failure, short circuit and the earth leakage search/lockout protection of main motor branch road
1, JDB
2, the superpotential capacitance-resistance absorption plant RC that produces when being used for suppressing vacuum A.C. contactor on-off circuit; Its annexation is: two AC vacuum contactor CKJ
1, CKJ
2Parallel connection is connected two comprehensive protector of motor JDB with switching circuit
1, JDB
2Respectively with two AC vacuum contactor CKJ
1, CKJ
2Connect, at two comprehensive protector of motor JDB
1, JDB
2Output capacitance-resistance absorption plant RC respectively is housed.
2, flame-proof mine double-speed motor speed governing vacuum electromagnetic starter according to claim 1 is characterized in that microcomputer-C adopts single-chip microcomputer.
3, flame-proof mine double-speed motor speed governing vacuum electromagnetic starter according to claim 1 is characterized in that vacuum electromagnetic starter is contained in the flameproof enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200320048U CN201286009Y (en) | 2008-03-06 | 2008-03-06 | Vacuum electromagnetic starter for speed governing flame proof dual speed motor for mining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200320048U CN201286009Y (en) | 2008-03-06 | 2008-03-06 | Vacuum electromagnetic starter for speed governing flame proof dual speed motor for mining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201286009Y true CN201286009Y (en) | 2009-08-05 |
Family
ID=40950977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200320048U Expired - Fee Related CN201286009Y (en) | 2008-03-06 | 2008-03-06 | Vacuum electromagnetic starter for speed governing flame proof dual speed motor for mining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201286009Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281642A (en) * | 2015-10-13 | 2016-01-27 | 太原惠特科技有限公司 | Mining flameproof intrinsically-safe AC variable-frequency system suitable for two-speed motor |
| CN107217884A (en) * | 2016-04-28 | 2017-09-29 | 梁崇彦 | A kind of double-speed motor ball screw traction lowering or hoisting gear of two layers of parking apparatus |
| CN110737235B (en) * | 2019-11-01 | 2022-10-21 | 中核核电运行管理有限公司 | Double-speed motor control device and method |
| CN116054008A (en) * | 2023-02-07 | 2023-05-02 | 泰安众诚自动化设备股份有限公司 | Multifunctional power distribution device with oil temperature and oil level protection function |
-
2008
- 2008-03-06 CN CNU2008200320048U patent/CN201286009Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281642A (en) * | 2015-10-13 | 2016-01-27 | 太原惠特科技有限公司 | Mining flameproof intrinsically-safe AC variable-frequency system suitable for two-speed motor |
| CN107217884A (en) * | 2016-04-28 | 2017-09-29 | 梁崇彦 | A kind of double-speed motor ball screw traction lowering or hoisting gear of two layers of parking apparatus |
| CN110737235B (en) * | 2019-11-01 | 2022-10-21 | 中核核电运行管理有限公司 | Double-speed motor control device and method |
| CN116054008A (en) * | 2023-02-07 | 2023-05-02 | 泰安众诚自动化设备股份有限公司 | Multifunctional power distribution device with oil temperature and oil level protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20100306 |