CN203406808U - Frequency conversion apparatus for taper motor of crane - Google Patents
Frequency conversion apparatus for taper motor of crane Download PDFInfo
- Publication number
- CN203406808U CN203406808U CN201320357910.6U CN201320357910U CN203406808U CN 203406808 U CN203406808 U CN 203406808U CN 201320357910 U CN201320357910 U CN 201320357910U CN 203406808 U CN203406808 U CN 203406808U
- Authority
- CN
- China
- Prior art keywords
- relay
- button
- normally
- branch road
- series
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model provides a frequency conversion apparatus for a taper motor of a crane. The frequency conversion apparatus includes a breaker (QC), a master contactor (MC), a transformer (TB 0), a motor (M3) and a control circuit; an input terminal of the breaker (QC) is connected with an output terminal of a primary power supply wire, an output terminal of the breaker (QC) is connected to an input terminal of the transformer (TB 0) and an input terminal of the master contactor (MC), and a secondary output terminal of the transformer (TB 0) is connected with two input terminals of the control circuit; and a frequency converter (BP) is disposed between the master contactor (MC) and the motor (M3), an output terminal of the frequency converter (BP) is connected to an input terminal of a brake unit, and an output terminal of the break unit is connected to a break resistor. The frequency conversion apparatus for the taper motor of the crane can effectively reduce an instantaneous current during starting process of the motor, and prevent from impact wear of gears caused by sudden starting.
Description
Technical field
The utility model relates to a kind of crane device, especially a kind of crane Cone-shaped electric machine device.
Background technology
Cone-shaped electric machine is usually used on electric block hoisting equipment, and as large and small car travelling mechanism and lifting mechanism, traditional Cone-shaped electric machine comes controlling run and shutdown by contacts of contactor closed and disconnected.Due to large and small car in crane job process and lifting mechanism Fraquent start, stop or crawl, because electric motor starting electric current is greater than rated current 6-7 doubly, will make like this contacts of contactor easily burn out, and operation makes contacts of contactor back-moving spring easily tired so continually, even occur phenomenon of rupture, solenoid is also easily subject to thermal breakdown simultaneously.In addition, in real work, gear impact wear is more serious, and noise is also larger, and steel construction also easily occurs that distortion or girder bow decline.
Summary of the invention
The technical problems to be solved in the utility model is: during available technology adopting contactor control circuit, contactor is fragile, the immediate current of motor in start-up course is excessive, starts or stops suddenly gear wear and the noise that can cause, and also can cause steel construction distortion and girder bow to decline.
In order to address the above problem, the utility model proposes a kind of crane Cone-shaped electric machine converter plant, comprise: circuit breaker, total contactor, transformer, motor and control circuit, the input of circuit breaker is connected with the output of main power source, the output of circuit breaker is connected with the input of total contactor with the input of transformer respectively, the secondary output end of transformer is connected with two inputs of control circuit, between total contactor and motor, be provided with frequency converter, the output of frequency converter is connected with brake unit input, the output of brake unit is connected with brake resistance.
In order to realize anxious stopping, total rising, always stop, rise, fall, left, right, the function of front and rear motion, the utility model is designed to comprise joystick by control circuit, total branch road that rises, always stop branch road, ascending branch road, descending branch road, left branch road, right branch road, front branch road and rear branch road, joystick comprises emergency stop switch, total button that rises, always stop button, rise button, button falls, left button, right button, front button and rear button, always play branch road, always stop branch road, ascending branch road, descending branch road, left branch road, right branch road, after front branch road and rear branch circuit parallel connection again and emergency stop switch be series between two inputs of control circuit, total play the coil that a route always plays button and total contactor and be composed in series, always stop a route and always stop button, the coil of the normally opened contact of total contactor and total contactor is composed in series, and ascending branch route rises button, the second relay normally-closed contact, the first relay coil, the first limit switch, load limiter is composed in series, and button falls in descending branch route, the first relay normally-closed contact, the second relay coil, the second limit switch is composed in series, a left route left button, the 4th relay normally-closed contact, the 3rd relay coil, the 3rd limit switch is composed in series, a right right button of route, the 3rd relay normally-closed contact, the 4th relay coil, the 4th limit switch is composed in series, button before front route, the 6th relay normally-closed contact, the 5th relay coil, the 5th limit switch is composed in series, and props up afterwards button after route, the 5th relay normally-closed contact, the 6th relay coil, the 6th limit switch is composed in series.
In order to realize the control of frequency converter to motor under varying environment, the designed frequency converter of the utility model comprises fault end, multistage speed end and DC signal output end, fault end is MCM end and MO1 end, multistage speed end is MI3 end, MI2 end and MI1 end, DC signal output end is DCM end, when frequency converter is used for electric block Electric Machine Control, between MCM end and DCM end, be in series with the 5th relay normally-closed contact and the 6th relay normally-closed contact, between MO1 holds and holds with MI3, short circuit is connected, between MI2 end and DCM end, be connected to the normally opened contact of the 6th relay, between MI1 end and DCM end, be connected to the normally opened contact of the 5th relay, when frequency converter is used for monkey Electric Machine Control, between MCM end and DCM end, be in series with the 3rd relay normally-closed contact and the 4th relay normally-closed contact, between MO1 holds and holds with MI3, short circuit is connected, between MI2 end and DCM end, be connected to the 4th relay normally open contact, between MI1 end and DCM end, be connected to the 3rd relay normally open contact, when frequency converter is used for crane Electric Machine Control, between MI3 end and DCM end, be connected with the parallel circuits of the normally opened contact of the first overcurrent protector and the normally opened contact of the second overcurrent protector, between MI2 end and DCM end, be connected to the second relay normally open contact, between MI1 end and DCM end, be connected to the first relay normally open contact.
In order to have misphase, disconnected phase time open circuit in general supply, the utility model also comprises a phase sequence relay, and the input of phase sequence relay is connected with the three-phase output end of circuit breaker, and the normally-closed contact of phase sequence relay is in series with total contactor coil.
Advantage of the present utility model is: (1) adopts frequency converter progressively to increase starting current, has avoided circuit instant starting currents excessive; (2) adopt frequency converter progressively to control the motor rotating speed that increases progressively and successively decrease, reduced moment startup and stopped the impact to transmission mechanism and steel construction, having reduced gear wear, fracture, steel construction distortion or girder bow declines, reduce impact noise and low frequency power consumption simultaneously, reduced maintenance and the use cost of machinery and electrical equipment.
Accompanying drawing explanation
Fig. 1 is frequency conversion main circuit schematic diagram of the present utility model;
Fig. 2 is control circuit schematic diagram of the present utility model;
Fig. 3 is electric block motor inverter control principle drawing of the present utility model;
Fig. 4 is vehicle motor Frequency Converter Control schematic diagram of the present utility model;
Fig. 5 is cargo motor Frequency Converter Control schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, the crane Cone-shaped electric machine converter plant that the utility model proposes comprises: circuit breaker Q C, total contactor MC, transformer TB0, motor M 3 and control circuit, the output L1 of the input of circuit breaker Q C and main power line, L2, L3 is connected, the output L22 of circuit breaker Q C, L33 is connected with the input of transformer TB0, the output L21 of circuit breaker Q C, L22, L23 is connected with the input of total contactor MC, two input L11 of the secondary output end of transformer TB0 and control circuit, L10 is connected, between total contactor MC and motor M 3, be provided with frequency converter B P, the output P of frequency converter B P, N is connected with brake unit input, the output PB of brake unit, P1 is connected with brake resistance.
Between total contactor MC and motor M 3, frequency converter B P is set and replaces original contactor, the flimsy problem of contactor while not only having avoided original employing contactor, and can make circuit in starting or stoping process, have the process of a buffering, reduced the immediate current of motor in start-up course, reduce the gear wear and the noise that owing to starting or stoping suddenly, cause, and can reduce the problem of steel construction distortion and the decline of girder bow.
Output at frequency converter B P connects brake unit, output at brake unit connects brake resistance, when 3 decelerations of frequency converter B P control motor M stop, motor M 3 produces regenerative current, make frequency converter B P DC bus-bar voltage exceed set point, external brake unit and brake resistance just can discharge motor M 3 and produce regenerative current, guarantee that frequency converter B P voltage is normal, avoid frequency converter B P to produce fault.
As shown in Figure 1; on converter circuit, also comprise a phase sequence relay XJ; the input of phase sequence relay XJ is connected with three-phase output end L21, L22, the L23 of circuit breaker Q C; the normally-closed contact 5,6 of phase sequence relay XJ and total contactor MC coil are in series; if general supply has misphase or disconnected phase; phase sequence relay XJ action, its normally-closed contact disconnects, and circuit is in halted state.
As shown in Figure 2, control circuit of the present utility model comprises joystick SB, total branch road that rises, always stop branch road, ascending branch road, descending branch road, left branch road, right branch road, front branch road and rear branch road, joystick SB comprises emergency stop switch, total button that rises, always stop button, rise button, button falls, left button, right button, front button and rear button, always play branch road, always stop branch road, ascending branch road, descending branch road, left branch road, right branch road, after front branch road and rear branch circuit parallel connection, be series at again two input L11 of control circuit with emergency stop switch, between L10, a total route always plays button and is composed in series with the coil of total contactor MC, always stops a route and always stops button, the coil of the normally opened contact of total contactor MC and total contactor MC is composed in series, and ascending branch route rises button, the second relay K A2 normally-closed contact, the first relay K A1 coil, the first limit switch XK1, load limiter GK is composed in series, and button falls in descending branch route, the first relay K A1 normally-closed contact, the second relay K A2 coil, the second limit switch XK2 is composed in series, a left route left button, the 4th relay K A4 normally-closed contact, the 3rd relay K A3 coil, the 3rd limit switch XK3 is composed in series, a right right button of route, the 3rd relay K A3 normally-closed contact, the 4th relay K A4 coil, the 4th limit switch XK4 is composed in series, button before front route, the 6th relay K A6 normally-closed contact, the 5th relay K A5 coil, the 5th limit switch XK5 is composed in series, and props up afterwards button after route, the 5th relay K A5 normally-closed contact, the 6th relay K A6 coil, the 6th limit switch XK6 is composed in series.
When emergency stop switch screws out connection on operating grip SB, enter ready state, when push handle SB rise button time the first relay K A1 action, frequency converter B P controls progressively speedup operation of motor M 3, the first limit switch XK1 action when rising to the limit, frequency converter B P controls motor M 3 and progressively slows down and stop, load limiter GK action while surpassing rated load weight equally, frequency converter B P controls motor M 3 and progressively slows down and stop; When push handle SB button falls and time the second relay K A2 action, frequency converter B P controls progressively speedup operation of motor M 3, the second limit switch XK2 action when dropping to the limit, frequency converter B P controls motor M 3 and progressively slows down and stop; The 3rd relay K A3 action when the left button of push handle SB, frequency converter B P controls progressively speedup operation of motor M 3, and when the 3rd limit switch XK3 action extremely in limited time left, frequency converter B P controls motor M 3 and progressively slows down and stop; The 4th relay K A4 action when the right button of push handle SB, frequency converter B P controls progressively speedup operation of motor M 3, and when the 4th limit switch XK4 action extremely in limited time to the right, frequency converter B P controls motor M 3 and progressively slows down and stop; The 5th relay K A5 action when the front button of push handle SB, frequency converter B P controls progressively speedup operation of motor M 3, and when the 5th limit switch XK5 action extremely in limited time forward, frequency converter B P controls motor M 3 and progressively slows down and stop; The 6th relay K A6 action when the rear button of push handle SB, frequency converter B P controls progressively speedup operation of motor M 3, and when the 6th limit switch XK6 action extremely in limited time backward, frequency converter B P controls motor M 3 and progressively slows down and stop.
As shown in Figure 3, when frequency converter B P is used for electric block Electric Machine Control, between MCM end and DCM end, be in series with the 5th relay K A5 normally-closed contact and the 6th relay K A6 normally-closed contact, between MO1 holds and holds with MI3, short circuit is connected, between MI2 end and DCM end, be connected to the 6th relay K A6 normally opened contact, between MI1 end and DCM end, be connected to the 5th relay K A5 normally opened contact.
When the 5th relay K A5 normally opened contact is closed, send motor M 3 forward instructions to frequency converter B P, when disconnecting, the 5th relay K A5 normally opened contact shuts down; When the 6th relay K A6 normally opened contact is closed, send motor M 3 reversion instructions to frequency converter B P, when disconnecting, the 6th relay K A6 normally opened contact shuts down; The 5th relay K A5 normally-closed contact and the 6th relay K A6 normally-closed contact are connected serially between MCM and DCM and MO1 end hold with MI3 between short circuit be connected to the fault automatic reset circuit of frequency converter B P.
As shown in Figure 4, when frequency converter B P carries out variable frequency control for the vehicle motor of crane, between MCM end and DCM end, be in series with the 3rd relay K A3 normally-closed contact and the 4th relay K A4 normally-closed contact, between MO1 holds and holds with MI3, short circuit is connected, between MI2 end and DCM end, be connected to the 4th relay K A4 normally opened contact, between MI1 end and DCM end, be connected to the 3rd relay K A3 normally opened contact.
When the 3rd relay K A3 normally opened contact is closed, send motor M 3 forward instructions to frequency converter B P, when disconnecting, the 3rd relay K A3 normally opened contact shuts down; When the 4th relay K A4 normally opened contact is closed, send motor M 3 reversion instructions to frequency converter B P, when disconnecting, the 4th relay K A4 normally opened contact shuts down; The 3rd relay K A3 normally-closed contact and the 4th relay K A4 normally-closed contact are connected serially between MCM and DCM and MO1 end hold with MI3 between short circuit be connected to the fault automatic reset circuit of frequency converter B P.
As shown in Figure 5; when frequency converter B P carries out variable frequency control for the cargo motor of crane; between MI3 end and DCM end, be connected with the parallel circuits of the normally opened contact of the first overcurrent protector F1 and the normally opened contact of the second overcurrent protector F2; between MI2 end and DCM end, be connected to the second relay K A2 normally opened contact, between MI1 end and DCM end, be connected to the first relay K A1 normally opened contact.
When the first relay K A1 normally opened contact is closed, send motor M 3 forward instructions to frequency converter B P, when disconnecting, the first relay K A1 normally opened contact shuts down; When the second relay K A2 normally opened contact is closed, send motor M 3 reversion instructions to frequency converter B P, when disconnecting, the second relay K A2 normally opened contact shuts down; The normally opened contact of the normally opened contact of the first overcurrent protector F1 and the second overcurrent protector F2 is connected in parallel between MO1 end and DCM end; when motor M 3 breaks down; the first overcurrent protector F1 or the second overcurrent protector F2 normally opened contact are closed; send halt instruction to frequency converter B P, to guarantee crane production safety.
Claims (4)
1. a crane Cone-shaped electric machine converter plant, comprise: circuit breaker (QC), total contactor (MC), transformer (TB0), motor (M3) and control circuit, the input of described circuit breaker (QC) is connected with the output of main power source, the output of described circuit breaker (QC) is connected with the input of total contactor (MC) with the input of transformer (TB0) respectively, the secondary output end of described transformer (TB0) is connected with two inputs of control circuit, it is characterized in that: between described total contactor (MC) and motor (M3), be provided with frequency converter (BP), the output of described frequency converter (BP) is connected with brake unit input, the output of described brake unit is connected with brake resistance.
2. crane Cone-shaped electric machine converter plant according to claim 1, is characterized in that: described control circuit comprises joystick (SB), total branch road that rises, always stop branch road, ascending branch road, descending branch road, left branch road, right branch road, front branch road and rear branch road, described joystick (SB) comprises emergency stop switch, total button that rises, always stop button, rise button, button falls, left button, right button, front button and rear button, described total branch road, always stop branch road, ascending branch road, descending branch road, left branch road, right branch road, after front branch road and rear branch circuit parallel connection again and emergency stop switch be series between two inputs of control circuit, the coil that described total route always plays button and total contactor (MC) is composed in series, a described route of always stopping is always stopped button, the coil of the normally opened contact of total contactor (MC) and total contactor (MC) is composed in series, and described ascending branch route rises button, the second relay (KA2) normally-closed contact, the first relay (KA1) coil, the first limit switch (XK1) and load limiter (GK) are composed in series, and button falls in described descending branch route, the first relay (KA1) normally-closed contact, the second relay (KA2) coil and the second limit switch (XK2) are composed in series, and route left button is propped up on a described left side, the 4th relay (KA4) normally-closed contact, the 3rd relay (KA3) coil and the 3rd limit switch (XK3) are composed in series, and the right button of route is propped up on the described right side, the 3rd relay (KA3) normally-closed contact, the 4th relay (KA4) coil and the 4th limit switch (XK4) are composed in series, button before a described front route, the 6th relay (KA6) normally-closed contact, the 5th relay (KA5) coil and the 5th limit switch (XK5) are composed in series, button after a described rear route, the 5th relay (KA5) normally-closed contact, the 6th relay (KA6) coil and the 6th limit switch (XK6) are composed in series.
3. crane Cone-shaped electric machine converter plant according to claim 2, it is characterized in that: described frequency converter (BP) comprises fault end, multistage speed end and DC signal output end, described fault end is MCM end and MO1 end, described multistage speed end is MI3 end, MI2 end and MI1 end, described DC signal output end is DCM end, when frequency converter (BP) is during for electric block Electric Machine Control, between described MCM end and DCM end, be in series with the 5th relay (KA5) normally-closed contact and the 6th relay (KA6) normally-closed contact, between described MO1 holds and holds with MI3, short circuit is connected, between described MI2 end and DCM end, be connected to the 6th relay (KA6) normally opened contact, between described MI1 end and DCM end, be connected to the 5th relay (KA5) normally opened contact, when frequency converter (BP) is during for monkey Electric Machine Control, between described MCM end and DCM end, be in series with the 3rd relay (KA3) normally-closed contact and the 4th relay (KA4) normally-closed contact, between described MO1 holds and holds with MI3, short circuit is connected, between described MI2 end and DCM end, be connected to the 4th relay (KA4) normally opened contact, between described MI1 end and DCM end, be connected to the 3rd relay (KA3) normally opened contact, when frequency converter (BP) is during for crane Electric Machine Control, between described MI3 end and DCM end, be connected with the parallel circuits of the normally opened contact of the first overcurrent protector (F1) and the normally opened contact of the second overcurrent protector (F2), between described MI2 end and DCM end, be connected to the second relay (KA2) normally opened contact, between described MI1 end and DCM end, be connected to the first relay (KA1) normally opened contact.
4. according to the crane Cone-shaped electric machine converter plant described in claim 2 or 3; it is characterized in that: described crane Cone-shaped electric machine converter plant also comprises a phase sequence relay (XJ); the input of described phase sequence relay (XJ) is connected with the output of circuit breaker (QC), and the normally-closed contact of phase sequence relay (XJ) is in series with total contactor (MC) coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320357910.6U CN203406808U (en) | 2013-06-20 | 2013-06-20 | Frequency conversion apparatus for taper motor of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320357910.6U CN203406808U (en) | 2013-06-20 | 2013-06-20 | Frequency conversion apparatus for taper motor of crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203406808U true CN203406808U (en) | 2014-01-22 |
Family
ID=49942728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320357910.6U Expired - Fee Related CN203406808U (en) | 2013-06-20 | 2013-06-20 | Frequency conversion apparatus for taper motor of crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203406808U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869810A (en) * | 2014-04-01 | 2014-06-18 | 新乡新起机器设备有限公司 | Multifunctional and automatic electric hoist test platform electrical control system |
| CN104038136A (en) * | 2014-06-09 | 2014-09-10 | 烟台宝钢钢管有限责任公司 | Cutting saw safety voltage control system |
| CN108821196A (en) * | 2018-08-17 | 2018-11-16 | 山东爱普电气设备有限公司 | A kind of magnetic navigation AGV electric control system and method |
| CN113931708A (en) * | 2021-09-29 | 2022-01-14 | 华能山东石岛湾核电有限公司 | Steam turbine barring drive circuit and device |
-
2013
- 2013-06-20 CN CN201320357910.6U patent/CN203406808U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869810A (en) * | 2014-04-01 | 2014-06-18 | 新乡新起机器设备有限公司 | Multifunctional and automatic electric hoist test platform electrical control system |
| CN104038136A (en) * | 2014-06-09 | 2014-09-10 | 烟台宝钢钢管有限责任公司 | Cutting saw safety voltage control system |
| CN108821196A (en) * | 2018-08-17 | 2018-11-16 | 山东爱普电气设备有限公司 | A kind of magnetic navigation AGV electric control system and method |
| CN108821196B (en) * | 2018-08-17 | 2023-08-04 | 山东爱普电气设备有限公司 | Magnetic navigation AGV electrical control system and method |
| CN113931708A (en) * | 2021-09-29 | 2022-01-14 | 华能山东石岛湾核电有限公司 | Steam turbine barring drive circuit and device |
| CN113931708B (en) * | 2021-09-29 | 2023-11-21 | 华能山东石岛湾核电有限公司 | Steam turbine jigger driving circuit and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101665220B (en) | Variable-frequency speed-regulating control system of crane | |
| CN203406808U (en) | Frequency conversion apparatus for taper motor of crane | |
| CN103928915A (en) | Non-full-phase protecting circuit of circuit breaker | |
| CN203787951U (en) | Three-phase inconsistent protective circuit of circuit breaker | |
| CN201961980U (en) | Voltage and speed regulation control system for bridge crane | |
| CN103928916A (en) | Three-phase inconsistency protection circuit of circuit breaker | |
| CN201538620U (en) | Control circuit of elevator brake system | |
| CN201976067U (en) | Variable frequency control device of fan | |
| CN203590094U (en) | Control system by soft starter for start-up of four motors | |
| CN203416199U (en) | Centrifuge emergency brake circuit structure | |
| CN204559446U (en) | A kind of wind generating set yaw control circuit | |
| CN112645218B (en) | Crane brake electrical control loop and control method thereof | |
| CN203269452U (en) | Steady braking circuit for variable amplitudes of single-jib crane | |
| CN204549870U (en) | Crane hoisting mechanism control setup | |
| CN201797302U (en) | Protective device for lifting of heavy crown block | |
| CN107472264B (en) | Diesel locomotive driver controller with load defencive function | |
| CN201976066U (en) | Frequency conversion control device of air compressor | |
| CN204810180U (en) | Starting drive | |
| CN203714643U (en) | Switch magnetic resistance control type speed regulation scraper conveyor | |
| CN102267663A (en) | Light-load system for cranes | |
| US2774027A (en) | Braking control system for electric motors | |
| US1313688A (en) | Hammer mfg | |
| CN203903808U (en) | Lifting mechanism control device for grab crane | |
| CN209045378U (en) | The four-bar mechanism of circuit breaker/load switch operating device | |
| CN102738770B (en) | Unloading overvoltage control method for auxiliary power generation system of locomotive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20170620 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |