CN102710185B - Device and method for time sequence open-phase control of three three-phase asynchronous motors - Google Patents
Device and method for time sequence open-phase control of three three-phase asynchronous motors Download PDFInfo
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- CN102710185B CN102710185B CN201210195348.1A CN201210195348A CN102710185B CN 102710185 B CN102710185 B CN 102710185B CN 201210195348 A CN201210195348 A CN 201210195348A CN 102710185 B CN102710185 B CN 102710185B
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Abstract
The invention provides a device and a method for time sequence open-phase control of three three-phase asynchronous motors. The device mainly comprises a main control box 1, a secondary control box 2 and three-phase asynchronous motors M, wherein the main control box 1 comprises a control unit, a fuse E, an automatic switch QF, a contactor KM and a three-phase three-wire power cord; and the secondary control box 2 comprises an alternating current contactor KM and a three-phase three-wire power cord. The time difference given by three phases of a power supply is determined according to the sequence of the contactor KM; and different loads are selected by a control system according to the difference of the time sequences given by three phases of the power supply. According to the device and the method disclosed by the invention, operation conditions of equipment and the operation environment of maintainers can be effectively improved, the fault rate of the equipment is reduced, the safety accident rate of the maintainers is reduced, a large amount of cables and noble cable pulleys are omitted and the expenses of materials and construction are greatly saved.
Description
Technical field
The invention belongs to automation field, be specifically related to a kind of sequential phase shortage for fields such as electric crane, expedition pump class and blower fans and control three threephase asynchronous device and methods.
Background technology
In some industry, military field, some electric cranes, expedition pump and the electric components such as fan-type are in environment position severe, with a varied topography.
In such environment, control panel is because vibration, dust, there was dampness in the air fault are more, lifetime; If at these local repair apparatus, people also will be in unsafe condition.
In order to reduce the failure rate of electric equipment, increase the useful life of electric equipment, and to maintainer, create the environment of a safety, the electric equipment of controlling these loads need to be concentrated and move on to that environment is good, the place of easy access (as: basic control system of single-beam electric crane being moved on to ground from high-altitude).
But in the local time that these control system parts are moved on to other, need to increase power cable.For example: when the control system critical piece of single-beam electric crane is moved on to ground from high-altitude, need to be aloft to increasing by 23 core power cables between ground.These newly-increased power cables cause difficulty of construction, construction cost greatly to increase, and have also increased the fault of system newly.
Summary of the invention
The present invention aims to provide a kind of three threephase asynchronous devices and methods therefors of control for electric crane, expedition pump class, long-range blower fan even load, object is to use minimum three-phase three-wire system cable, realize three threephase asynchronouses of Long-distance Control, improve the service conditions of control panel and people's operational environment.
For reaching this object, the present invention has adopted following technical scheme:
Sequential phase shortage is controlled three threephase asynchronous devices, it is characterized in that, main control box 1, auxiliary control case 2 and threephase asynchronous M, consists of;
Main control box 1 comprises control unit, fuse E, automatic switch QF, contactor KM and three-phase three-wire system power line L-L;
Auxiliary control case 2 comprises A.C. contactor KM, three-phase three-wire system power line L-L;
Three cover fuse E1 in main control box 1, E2, E3 is connected in live wire inlet wire side L1, L2, the L3 of three-phase three-wire system power line successively, fuse E1, E2, E3 output live wire is followed successively by L1/1, L2/1, L3/1; Automatic switch QF1, automatic switch QF2, automatic switch QF3 are used electric wire and are connected on three-phase firewire L1/1, L2/1, L3/1; Automatic switch QF1 output line is three-phase power line 1L1,1L2,1L3; Automatic switch QF2 output line is three-phase power line 2L1,2L2,2L3; Automatic switch QF3 output line is three-phase power line 3L1,3L2,3L3; Live wire 1L1 connects any one main contacts input of contactor KM11, live wire 1L2 connects contactor KM12 main contacts B phase input, live wire 1L2 connects contactor KM13 main contacts C phase input, live wire 1L3 connects contactor KM12 main contacts C phase input, and live wire 1L3 connects contactor KM13 main contacts B phase input; Live wire 2L2 connects any one main contact input of contactor KM21, live wire 2L1 connects contactor KM22 main contacts A phase input, live wire 2L1 connects contactor KM23 main contacts C phase input, live wire 2L3 connects contactor KM22 main contacts C phase input, and live wire 2L3 connects contactor KM23 main contacts A phase input; Live wire 3L3 connects any one main contact input of contactor KM31, live wire 3L1 connects contactor KM32 main contacts A phase input, live wire 3L1 connects contactor KM33 main contacts B phase input, live wire 3L2 connects contactor KM32 main contacts B phase input, and live wire 3L2 connects contactor KM33 main contacts A phase input; Live wire 1L1,2L1,2L3,3L1,3L2 are respectively after contactor electric contact KM11, KM22, KM23, KM32, KM33, and five wires are parallel to L1 ' and draw outside main control box (1); 1L2,1L3,2L2,3L1,3L2 are respectively after contactor electric contact KM12, KM13, KM21, KM33, KM32, and five wires are parallel to L2 ' and draw outside main control box 1; Live wire 1L2,1L3,2L1,2L3,3L3 are respectively after contactor electric contact KM13, KM12, KM23, KM22, KM31, and five wires are parallel to L3 ' and draw outside main control box 1, form three-phase three-wire system power supply and guide in auxiliary control case 2;
Interior three A.C. contactors of auxiliary control case 2 often open that three-phase three-wire system power supply L1 ' is guided in electric contact KM14, KM24, the parallel connection of KM34 upper end, L2 ', L3 ' are upper, and three A.C. contactors are often opened electric contact KM14, KM24, auxiliary control case 2 outsides are drawn in KM34 lower end; Contactor coil KM14 is series at contactor KM24 and the normally closed electric contact of KM34, and power line originates in the live wire L2 ' of three-phase three-wire system power supply, ends at the live wire L3 ' of three-phase three-wire system power supply; Contactor coil KM24 is series at contactor KM34 and the normally closed electric contact of KM14, and power line originates in the live wire L1 ' of three-phase three-wire system power supply, ends at the live wire L3 ' of three-phase three-wire system power supply; Contactor coil KM34 is series at contactor KM24 and the normally closed electric contact of KM14, and power line originates in the live wire L1 ' of three-phase three-wire system power supply, ends at the live wire L2 ' of three-phase three-wire system power supply; The corresponding threephase asynchronous M that connects of A.C. contactor lead-out wire of auxiliary control case 2 inside.
The automatic switch QF parameter of described main control box 1 inside is mated with corresponding threephase asynchronous respectively.
The control unit of described main control box 1 inside is button, change over switch, remote controller, PLC, microcomputer or wiring board.
A kind of method of applying three threephase asynchronous devices of above-mentioned sequential phase shortage control, it is characterized in that, at main control box 1, interior every 3 contactor KM are a combination, in these 3 contactor KM, there is the rotating of two-phase power supply and the control motor of 2 output motors, another output residue phase power supply, and this phase power supply of output lags behind a period of time, it is 0.2-0.5 second that the time is no less than contactor KM adhesive operate time; Every group of contactor KM sends the power supply of phase shortage in short-term not of the same race, the phase shortage power supply auxiliary control case 2 of reaching the spot in short-term, the contactor KM of auxiliary control case 2 inside is used the power supply of phase shortage in short-term of sending here to select as condition, determine which major loop contactor action in auxiliary control case 2, determine which platform motor M action, and determine that according to phase sequence motor M is forward or reversion; It is identical that the contactor KM that the inner contactor KM that exports residue phase of main control box 1 starts operate time and auxiliary control case 2 inside starts operate time; According to contactor KM, determine the time difference that the three-phase of power supply provides operate time, the time sequencing of utilizing the three-phase of power supply to provide is different, by control system, selects different loads; Concrete grammar is:
When startup threephase asynchronous M1 makes its forward:
Q0.2 and Q0.4 provide signal, KM12 adhesive, KM14 and KM11 adhesive, the operation of threephase asynchronous M1 forward;
When startup threephase asynchronous M1 makes its reversion:
Q0.3 and Q0.4 provide signal, KM13 adhesive, KM14 and KM11 adhesive, the threephase asynchronous M1 operation of reversing;
When startup threephase asynchronous M2 makes its forward:
Q0.5 and Q0.7 provide signal, KM22 adhesive, KM24 and KM21 adhesive, the operation of threephase asynchronous M2 forward;
When startup threephase asynchronous M2 makes its reversion:
Q0.6 and Q0.7 provide signal, KM23 adhesive, KM24 and KM21 adhesive, the threephase asynchronous M2 operation of reversing;
When startup threephase asynchronous M3 makes its forward:
Q1.0 and Q1.2 provide signal, KM32 adhesive, KM34 and KM31 adhesive, the operation of threephase asynchronous M3 forward;
When startup threephase asynchronous M3 makes its reversion:
Q1.1 and Q1.2 provide signal, KM33 adhesive, KM34 and KM31 adhesive, the threephase asynchronous M3 operation of reversing.
By the auxiliary contact of contactor KM14, KM24, KM34 inside or the electric contact of use auxiliary relay, realize motor forward/backward rotation and interlock, between motor and motor, interlock.
Beneficial effect of the present invention is:
1, the present invention can effectively improve the service conditions of equipment and maintainer's operating environment, reduces equipment failure rate, reduces maintainer's security incident rate.
2, the present invention can avoid using a large amount of cables and expensive cable coaster, greatly saves Master Cost and operating expenses.
Accompanying drawing explanation
Accompanying drawing is that sequential phase shortage is controlled three threephase asynchronous device elementary diagrams.
In figure: 1 is main control box; 2 is auxiliary control case; M is threephase asynchronous; E is fuse; QF is automatic switch; KM is contactor; L is three-phase three-wire system power firestreak; A, B, C are contactor main contacts input phase place; KM11, KM12, KM13, KM14, KM21, KM22, KM23, KM24, KM31, KM32, KM33, KM34 are contactor; Q0.2, Q0.3, Q0.4, Q0.5, Q0.6, Q0.7, Q1.0, Q1.1, Q1.2 are respectively control unit output point.
Embodiment
Sequential phase shortage of the present invention is controlled three threephase asynchronous devices, main control box 1, auxiliary control case 2 and threephase asynchronous M, consists of.
Main control box 1 comprises control unit, fuse E, automatic switch QF, contactor KM and three-phase three-wire system power line live wire L-L.
Auxiliary control case 2 comprises A.C. contactor KM, three-phase three-wire system power line L-L.
Three cover fuse E1 in main control box 1, E2, E3 is connected in live wire inlet wire side L1, L2, the L3 of three-phase three-wire system power line successively, fuse E1, E2, E3 output live wire is followed successively by L1/1, L2/1, L3/1; Automatic switch QF1, automatic switch QF2, automatic switch QF3 are used electric wire and are connected on three-phase firewire L1/1, L2/1, L3/1; Automatic switch QF1 output line is three-phase power line 1L1,1L2,1L3; Automatic switch QF2 output line is three-phase power line 2L1,2L2,2L3; Automatic switch QF3 output line is three-phase power line 3L1,3L2,3L3; Live wire 1L1 connects any one main contacts input of contactor KM11, live wire 1L2 connects contactor KM12 main contacts B phase input, live wire 1L2 connects contactor KM13 main contacts C phase input, live wire 1L3 connects contactor KM12 main contacts C phase input, and live wire 1L3 connects contactor KM13 main contacts B phase input; Live wire 2L2 connects any one main contact input of contactor KM21, live wire 2L1 connects contactor KM22 main contacts A phase input, live wire 2L1 connects contactor KM23 main contacts C phase input, live wire 2L3 connects contactor KM22 main contacts C phase input, and live wire 2L3 connects contactor KM23 main contacts A phase input; Live wire 3L3 connects any one main contact input of contactor KM31, live wire 3L1 connects contactor KM32 main contacts A phase input, live wire 3L1 connects contactor KM33 main contacts B phase input, live wire 3L2 connects contactor KM32 main contacts B phase input, and live wire 3L2 connects contactor KM33 main contacts A phase input; Live wire 1L1,2L1,2L3,3L1,3L2 are respectively after contactor electric contact KM11, KM22, KM23, KM32, KM33, and five wires are parallel to L1 ' and draw outside main control box 1; 1L2,1L3,2L2,3L1,3L2 are respectively after contactor electric contact KM12, KM13, KM21, KM33, KM32, and five wires are parallel to L2 ' and draw outside main control box 1; Live wire 1L2,1L3,2L1,2L3,3L3 are respectively after contactor electric contact KM13, KM12, KM23, KM22, KM31, five wires are parallel to L3 ' and draw outside main control box 1, and live wire L1 ', L2 ', L3 ' form three-phase three-wire system power supply and guide in auxiliary control case 2;
Interior three A.C. contactors of auxiliary control case 2 often open that three-phase three-wire system power supply L1 ' is guided in electric contact KM14, KM24, the parallel connection of KM34 upper end, L2 ', L3 ' are upper, and three A.C. contactors are often opened electric contact KM14, KM24, auxiliary control case 2 outsides are drawn in KM34 lower end; Contactor coil KM14 is series at contactor KM24 and the normally closed electric contact of KM34, and power line originates in the live wire L2 ' of three-phase three-wire system power supply, ends at the live wire L3 ' of three-phase three-wire system power supply; Contactor coil KM24 is series at contactor KM34 and the normally closed electric contact of KM14, and power line originates in the live wire L1 ' of three-phase three-wire system power supply, ends at the live wire L3 ' of three-phase three-wire system power supply; Contactor coil KM34 is series at contactor KM24 and the normally closed electric contact of KM14, and power line originates in the live wire L1 ' of three-phase three-wire system power supply, ends at the live wire L2 ' of three-phase three-wire system power supply; The corresponding threephase asynchronous M that connects of A.C. contactor lead-out wire of auxiliary control case 2 inside.
The automatic switch QF parameter of described main control box 1 inside is mated with corresponding threephase asynchronous respectively.
The control unit of described main control box 1 inside is button, change over switch, remote controller, PLC, microcomputer or wiring board.
A kind of sequential phase shortage is controlled the method for three threephase asynchronous devices, at 12 contactors of the interior installation of main control box 1, wherein every 3 contactor KM are a combination, in these 3 contactor KM, there is the rotating of two-phase power supply and the control motor of 2 output motors, another output residue phase power supply, and this phase power supply of output lags behind a period of time, it is 0.2-0.5 second that the time is no less than contactor KM adhesive operate time; Every group of contactor KM sends the power supply of phase shortage in short-term not of the same race, the phase shortage power supply auxiliary control case 2 of reaching the spot in short-term, the contactor KM of auxiliary control case 2 inside is used the power supply of phase shortage in short-term of sending here to select as condition, determine which major loop contactor action in auxiliary control case 2, determine which platform motor M action, and determine that according to phase sequence motor M is forward or reversion; It is identical that the contactor KM that the inner contactor KM that exports residue phase of main control box 1 starts operate time and auxiliary control case 2 inside starts operate time; According to contactor KM, determine the time difference that the three-phase of power supply provides operate time, the time sequencing of utilizing the three-phase of power supply to provide is different, by control system, selects different loads.Concrete grammar is:
When startup threephase asynchronous M1 makes its forward:
Q0.2 and Q0.4 provide signal, KM12 adhesive, KM14 and KM11 adhesive, the operation of threephase asynchronous M1 forward;
When startup threephase asynchronous M1 makes its reversion:
Q0.3 and Q0.4 provide signal, KM13 adhesive, KM14 and KM11 adhesive, the threephase asynchronous M1 operation of reversing;
When startup threephase asynchronous M2 makes its forward:
Q0.5 and Q0.7 provide signal, KM22 adhesive, KM24 and KM21 adhesive, the operation of threephase asynchronous M2 forward;
When startup threephase asynchronous M2 makes its reversion:
Q0.6 and Q0.7 provide signal, KM23 adhesive, KM24 and KM21 adhesive, the threephase asynchronous M2 operation of reversing;
When startup threephase asynchronous M3 makes its forward:
Q1.0 and Q1.2 provide signal, KM32 adhesive, KM34 and KM31 adhesive, the operation of threephase asynchronous M3 forward;
When startup threephase asynchronous M3 makes its reversion:
Q1.1 and Q1.2 provide signal, KM33 adhesive, KM34 and KM31 adhesive, the threephase asynchronous M3 operation of reversing.
By the auxiliary contact of contactor KM14, KM24, KM34 inside or the electric contact of use auxiliary relay, realize motor forward/backward rotation and interlock, between motor and motor, interlock.
Claims (5)
1. sequential phase shortage is controlled three threephase asynchronous devices, it is characterized in that, main control box (1), auxiliary control case (2) and threephase asynchronous M, consists of;
Main control box (1) comprises control unit, fuse E, automatic switch QF, contactor KM and three-phase three-wire system power line L-L;
Auxiliary control case (2) comprises A.C. contactor KM, three-phase three-wire system power line L-L;
Three cover fuse E1 in main control box (1), E2, E3 is connected in live wire inlet wire side L1, L2, the L3 of three-phase three-wire system power line successively, fuse E1, E2, E3 output live wire is followed successively by L1/1, L2/1, L3/1; Automatic switch QF1, automatic switch QF2, automatic switch QF3 are used electric wire and are connected on three-phase firewire L1/1, L2/1, L3/1; Automatic switch QF1 output line is three-phase power line 1L1,1L2,1L3; Automatic switch QF2 output line is three-phase power line 2L1,2L2,2L3; Automatic switch QF3 output line is three-phase power line 3L1,3L2,3L3; Live wire 1L1 connects any one main contacts input of contactor KM11, live wire 1L2 connects contactor KM12 main contacts B phase input, live wire 1L2 connects contactor KM13 main contacts C phase input, live wire 1L3 connects contactor KM12 main contacts C phase input, and live wire 1L3 connects contactor KM13 main contacts B phase input; Live wire 2L2 connects any one main contact input of contactor KM21, live wire 2L1 connects contactor KM22 main contacts A phase input, live wire 2L1 connects contactor KM23 main contacts C phase input, live wire 2L3 connects contactor KM22 main contacts C phase input, and live wire 2L3 connects contactor KM23 main contacts A phase input; Live wire 3L3 connects any one main contact input of contactor KM31, live wire 3L1 connects contactor KM32 main contacts A phase input, live wire 3L1 connects contactor KM33 main contacts B phase input, live wire 3L2 connects contactor KM32 main contacts B phase input, and live wire 3L2 connects contactor KM33 main contacts A phase input; Live wire 1L1,2L1,2L3,3L1,3L2 are respectively after contactor electric contact KM11, KM22, KM23, KM32, KM33, and five wires are parallel to L1 ' and draw outside main control box (1); 1L2,1L3,2L2,3L1,3L2 are respectively after contactor electric contact KM12, KM13, KM21, KM33, KM32, and five wires are parallel to L2 ' and draw outside main control box (1); Live wire 1L2,1L3,2L1,2L3,3L3 are respectively after contactor electric contact KM13, KM12, KM23, KM22, KM31, five wires are parallel to L3 ' and draw outside main control box (1), form three-phase three-wire system power supply and guide in auxiliary control case (2);
Interior three A.C. contactors of auxiliary control case (2) often open that three-phase three-wire system power supply L1 ' is guided in electric contact KM14, KM24, the parallel connection of KM34 upper end, L2 ', L3 ' are upper, and three A.C. contactors are often opened electric contact KM14, KM24, auxiliary control case (2) outside is drawn in KM34 lower end; Contactor coil KM14 is series at contactor KM24 and the normally closed electric contact of KM34, and power line originates in the live wire L2 ' of three-phase three-wire system power supply, ends at the live wire L3 ' of three-phase three-wire system power supply; Contactor coil KM24 is series at contactor KM34 and the normally closed electric contact of KM14, and power line originates in the live wire L1 ' of three-phase three-wire system power supply, ends at the live wire L3 ' of three-phase three-wire system power supply; Contactor coil KM34 is series at contactor KM24 and the normally closed electric contact of KM14, and power line originates in the live wire L1 ' of three-phase three-wire system power supply, ends at the live wire L2 ' of three-phase three-wire system power supply; The corresponding threephase asynchronous M that connects of A.C. contactor lead-out wire that auxiliary control case (2) is inner.
2. sequential phase shortage according to claim 1 is controlled three threephase asynchronous devices, it is characterized in that, the inner automatic switch QF parameter of described main control box (1) is mated with corresponding threephase asynchronous respectively.
3. sequential phase shortage according to claim 1 is controlled three threephase asynchronous devices, it is characterized in that, the inner control unit of described main control box (1) is button, change over switch, remote controller, PLC, microcomputer or wiring board.
4. an application rights requires sequential phase shortage described in 1 to control the method for three threephase asynchronous devices, it is characterized in that, in main control box (1), every 3 contactor KM are a combination, in these 3 contactor KM, there is the rotating of two-phase power supply and the control motor of 2 output motors, another output residue phase power supply, and this phase power supply of output lags behind a period of time, it is 0.2-0.5 second that the time is no less than contactor KM adhesive operate time; Every group of contactor KM sends the power supply of phase shortage in short-term not of the same race, the phase shortage power supply auxiliary control case (2) of reaching the spot in short-term, the inner contactor KM of auxiliary control case (2) is used the power supply of phase shortage in short-term of sending here to select as condition, determine which major loop contactor action in auxiliary control case (2), determine which platform motor M action, and determine that according to phase sequence motor M is forward or reversion; The contactor KM of the inner output residue of main control box (1) phase starts operate time and the inner contactor KM of auxiliary control case (2), and to start operate time identical; According to contactor KM, determine the time difference that the three-phase of power supply provides operate time, the time sequencing of utilizing the three-phase of power supply to provide is different, by control system, selects different loads; Concrete grammar is:
When startup threephase asynchronous M1 makes its forward:
Q0.2 and Q0.4 provide signal, KM12 adhesive, KM14 and KM11 adhesive, the operation of threephase asynchronous M1 forward;
When startup threephase asynchronous M1 makes its reversion:
Q0.3 and Q0.4 provide signal, KM13 adhesive, KM14 and KM11 adhesive, the threephase asynchronous M1 operation of reversing;
When startup threephase asynchronous M2 makes its forward:
Q0.5 and Q0.7 provide signal, KM22 adhesive, KM24 and KM21 adhesive, the operation of threephase asynchronous M2 forward;
When startup threephase asynchronous M2 makes its reversion:
Q0.6 and Q0.7 provide signal, KM23 adhesive, KM24 and KM21 adhesive, the threephase asynchronous M2 operation of reversing;
When startup threephase asynchronous M3 makes its forward:
Q1.0 and Q1.2 provide signal, KM32 adhesive, KM34 and KM31 adhesive, the operation of threephase asynchronous M3 forward;
When startup threephase asynchronous M3 makes its reversion:
Q1.1 and Q1.2 provide signal, KM33 adhesive, KM34 and KM31 adhesive, the threephase asynchronous M3 operation of reversing;
Q0.2, Q0.3, Q0.4, Q0.5, Q0.6, Q0.7, Q1.0, Q1.1, Q1.2 are respectively the control unit output point of main control box (1).
5. application rights according to claim 4 requires the method for three threephase asynchronous devices of sequential phase shortage control described in 1, it is characterized in that, by the auxiliary contact of contactor KM14, KM24, KM34 inside or the electric contact of use auxiliary relay, realize motor forward/backward rotation and interlock, between motor and motor, interlock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210195348.1A CN102710185B (en) | 2012-06-13 | 2012-06-13 | Device and method for time sequence open-phase control of three three-phase asynchronous motors |
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| CN201210195348.1A CN102710185B (en) | 2012-06-13 | 2012-06-13 | Device and method for time sequence open-phase control of three three-phase asynchronous motors |
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