CN201024037Y - Electromagnet contact-free control device - Google Patents
Electromagnet contact-free control device Download PDFInfo
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- CN201024037Y CN201024037Y CNU2007200104326U CN200720010432U CN201024037Y CN 201024037 Y CN201024037 Y CN 201024037Y CN U2007200104326 U CNU2007200104326 U CN U2007200104326U CN 200720010432 U CN200720010432 U CN 200720010432U CN 201024037 Y CN201024037 Y CN 201024037Y
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Abstract
The utility model relates to an electromagnet no-contact point control device, which comprises a three-phase AC power supply and a control unit. The technical point of the utility model is that output terminals of the AC power supply and the control unit are respectively connected with input terminals of a transformation and rectifier unit and an electricity shut-down protection unit; the output terminals of the transformation and rectifier unit are respectively connected with the excitation demagnetization conversion and control unit and an automatic charging unit; a computer logic and control unit receives the control signal of the electricity shut-down protection unit and the electricity is supplied by a batter group; the computer logic and control unit provides the excitation demagnetization conversion reflowing logic instructions without contact points of a load and reflowing protection unit for the excitation demagnetization conversion and control unit; the output terminals of the computer logic and control unit are connected with the excitation demagnetization conversion and control unit by an hold and control unit. The utility model is mainly characterized in that the utility model saves the routine protection elements, and radically solves the over-voltage problem at two ends of the electromagnet coils. Therefore, the utility model largely reduces the safe hidden trouble. Furthermore, the utility model has the advantages of reasonable structure and high automation, etc.
Description
Technical field
The utility model relates to a kind of industrial weight-lifting equipment technical field, specifically a kind of control system of electromagnet without contact of direct supply being provided for the large-scale lifting electromagnet of direct current and realizing contact pointless control.Purpose provides safe and reliable control for the work of lifting electromagnet.
Background technology
At present, the lifting electromagnet control technology also rests on former Soviet Union's level of the fifties.Though the speed of development of electronic component is very fast in recent years, aspect the lifting electromagnet control technology employing is being arranged more, not very desirable.Because the lifting electromagnet coil belongs to big inductance element, when leading to big electric current, magnet coil can store very big magnetic field energy in coil, when turn-offing the electromagnet field voltage, the huge energy that is stored in the excitation coil of electromagnet will discharge at short notice, and the releasing pattern of this energy is exactly arcing between the contact of DC contactor; Produce over voltage, the normally transient high voltage of rated operational voltage more than ten times at breakerless electronic component (as IGBT) two ends.Just when DC contactor disconnects, produce huge pyrophoric behavio(u)r,, just need safeguard and change the contact so the contact of DC contactor can will burn out after of short duration work a period of time usually; Breakerless electronic component (as IGBT) is burnt out, just need to safeguard and change.Generation is higher than the transient high voltage of rated operational voltage more than ten times at the magnet coil two ends, and this high potential is very unfavorable to the insulation of magnet coil, is easy to the insulation of breakdown potential magnet coil.Adopting electronic component to replace DC contactor under this mode of operation is a very big difficult problem.The high potential that the magnet coil two ends produce is to be difficult to solve for general electronic component.The cost height is fragile, is the actual conditions of using at present.In view of the situation, be badly in need of a kind of energy of exploitation stable operation, no spark, noiselessness, the energy-saving lifting electromagnet non-contact controlling device of being convenient to safeguard.
Summary of the invention
The purpose of this utility model provides the control control system of electromagnet without contact that a kind of work for lifting electromagnet provides safe and reliable continuous working.To solve lifting electromagnet when adopting new electronic component IGBT to do contact pointless control, serviceability is more stable, and is more reliable, more economical durable, and energy-conservation lifting electromagnet non-contact controlling device.
The purpose of this utility model is achieved in that it comprises three-phase alternating-current supply and control unit, transformation and rectification unit, keep and control unit, it is characterized in that: the mouth of source of AC and control unit joins with the input end of transformation and rectification unit and power down protection unit respectively, and transformation connects with control unit and automatic charhing unit with excitatory demagnetization conversion respectively with the mouth of rectification unit; Computer logic and control unit are accepted the control signal of power down protection unit and by battery-powered; Computer logic and control unit provide the excitatory demagnetization conversion afterflow logical order that load and afterflow protected location are carried out contact pointless control for excitatory demagnetization conversion and control unit; The mouth of computer logic and control unit links by maintenance and control unit and excitatory demagnetization conversion and control unit.
Above-mentioned excitatory demagnetization conversion and control unit comprise driving circuit, executive circuit and relay; Computer logic and control unit comprise Programmable Logic Controller and relay; Load and afterflow protected location comprise magnet coil, current-limiting resistance and electronic switch.
Adopt modular design because the major loop of this device is whole, integrated functions such as three phase rectifier, excitation, demagnetization, full automaticity charging in multifunction module.Control system all adopts the control of PLC microcomputer logic, thereby obtains the needed multi-functional DC control supply of lifting electromagnet.It is the most advanced desirable rectification control convenience of lifting electromagnet.Its most outstanding characteristics are energy-conservation 30%, do not have the reactive loss phenomenon, and particularly control circuit adopts the backup power power supply, and the function that detects backup power is arranged, and makes device more safe and reliable.Full automaticity combined type charging modes is adopted in the emergency battery charging, can make emergency battery forever be in saturation conditions.Battery adopts the totally enclosed maintenance-free battery.Therefore, this system one carries on a shoulder pole the maintenance that seldom needs repairing of putting into production.All magnet control parameters can reach optimization, idealized, have also prolonged the service life of electromagnet.It is zero that magnetic switching time is protected in outage; Producers and equipment are had more safety.The holding time factory setting of emergency battery is 15 minutes, adopts computing machine to carry out accuracy control, thereby has prolonged the service life of battery.Power failure, power down, phase shortage phenomenon are carried out optimized control, make this system more safe and reliable.
Principal feature of the present utility model is: removed the unnecessary protection element from, i.e. the shortcoming of resistance, electric capacity protection: volume is big, poor reliability, the shortcoming that the cost cost is high; The utility model also has simple in structure, and materials are economized, and have fundamentally solved the overvoltage problem at magnet coil two ends, therefore, have reduced potential safety hazard widely; And the volume of energy-saving lifting electromagnet non-contact controlling device of the present utility model only is 1/4th of a like product; And, also have rational in infrastructure, long service life, easy and simple to handle, the degree of automation height is used and is safeguarded advantages such as very convenient.
Description of drawings
Fig. 1 is a logic control block diagram of the present utility model;
Fig. 2 is circuit control principle figure of the present utility model;
Fig. 3 is that the structural representation sketch cuts open in office of the present utility model.
To be described in further detail the utility model by example below; but following example only is the utility model example wherein; the rights protection scope of not representing the utility model and being limited, rights protection scope of the present utility model is as the criterion with claims.
The specific embodiment
Example 1
Shown in Fig. 1-3, lifting electromagnet non-contact controlling device technical scheme among the figure is: the mouth of source of AC and control unit 1 joins with the input end of transformation and rectification unit 2 and power down protection unit 4 respectively, and transformation connects with control unit 3 and automatic charhing unit 5 with excitatory demagnetization conversion respectively with the mouth of rectification unit 2; Computer logic and control unit 7 are accepted the control signal of power down protection unit 4 and are powered by battery pack 8; Computer logic and control unit 7 provide the excitatory demagnetization conversion afterflow logical order that load and afterflow protected location 9 are carried out contact pointless control for excitatory demagnetization conversion and control unit 3; The mouth of computer logic and control unit 7 links with control unit 6 and excitatory demagnetization conversion and control unit 3 by keeping.The utility model is to adopt the on-off element of novel insulated gate bipolar high power transistor IGBT as direct current circuit, and is furnished with control protection electric circuit.Three-phase alternating-current supply AC, be connected to transformation and rectification unit 2 through source of AC and control unit 1, the vdc of its rectification output, be connected on the excitation coil of electromagnet with control unit 3 by excitatory demagnetization conversion, provide direct supply for automatic charhing unit 5 simultaneously, carry out the full automaticity charging for battery pack 8, so just formed governor circuit; Computer logic and control unit 7 are accepted the control signal of control box K, power down protection unit 4, by battery pack 8 power supplies.By the control of control box K,, thereby realize that the contact pointless that load and afterflow protected location 9 are carried out controls for excitatory demagnetization conversion and control unit 3 provide accurate excitatory demagnetization conversion logic instruction.Because of load is the lifting electromagnet coil, belong to big inductance element, when magnet coil leads to big electric current, can store very big magnetic field energy, i.e. over voltage phenomenon in coil, in order to protect the power circuit of IGBT, increased afterflow protected location 9 at the magnet coil two ends; Be R4, MOS4 on-off element, the mode of operation of accuracy control MOS4 of logic is clamped down on the superpotential rising of pointed pulse by computer time, plays a protective role.
In addition, by shown in Figure 3,10 among the figure is control housing, and S1 and S2 are the control housing door lock, and E is a stand by battery.
The concrete operations step:
1, use preceding preparation: at first the instrument of testing fixture, voltage transformer, contactless switch, electronic component have or not damage, screw that the non-loosening phenomenon is arranged, otherwise install after needing to handle again.With three-phase alternating-current supply, operating case, the lifting electromagnet of feedway, carefully connect the wire according to the detailed service instructions of this device.Key switch KN on the operating case is moved on the position of pass to the automatic air-break switch ZK that closes, at first CJ1, CJ2, the work of CJ3 open-phase protection relay, the adhesive of CJ0 relay; Voltage transformer B gets electric, three rectifier bridge Q1, Q2 work.At this moment volt meter V1, V2, amperemeter/ammtr A1 and indicator lamp L1, L2 all have indication, prove three-phase alternating-current supply, rectifying circuit, stand by battery E, automatic charge device are all working properly, and dead work is ready;
2, suction operation: on the position that the key switch KN on the operating case is moved to open, electromagnet TL is put into by on the material of handling, operating switch K is moved to a place, i.e. suction position, computing machine P1 begins to carry out the logical program evaluation work; Driving circuit P2 work, J1, J2 adhesive, the MOS1 conducting, the excitatory work of forward, electromagnet TL gets electric work, and material is held;
3, handling operation: just can carry out handling after material is held;
4, blowing operation: operating switch K is moved to the b place, be the blowing position, computing machine P1 begins to carry out the logical program evaluation work, driving circuit P2 work, J1 disconnects, after the J2 time-delay disconnects, J3 adhesive, MOS2 conducting, reverse excitatory work, electromagnet TL gets electric work, and the absorbate material puts down automatically, has also just finished the electromagnet suction and the discharging work of one-period after blowing is finished.Computing machine P1 automatically resets, and waits for the operation of next cycle of operations;
Must guarantee when 5, operating personal leaves hoisting crane that operating switch K moves the b place to, promptly on the blowing position.
Claims (6)
1. control system of electromagnet without contact, it comprises three-phase alternating-current supply and control unit (1), transformation and rectification unit (2), keep and control unit (6), it is characterized in that: the mouth of source of AC and control unit (1) joins with the input end of transformation and rectification unit (2) and power down protection unit (4) respectively, and the mouth of transformation and rectification unit (2) links with excitatory demagnetization conversion and control unit (3) and automatic charhing unit (5) respectively; Computer logic and control unit (7) are accepted the control signal of power down protection unit (4) and are powered by battery pack (8); Computer logic and control unit (7) carry out the excitatory demagnetization that contact pointless controls to load and afterflow protected location (9) and change the afterflow logical order for excitatory demagnetization conversion and control unit (3) provide; The mouth of computer logic and control unit (7) links with control unit (6) and excitatory demagnetization conversion and control unit (3) by keeping.
2. control system of electromagnet without contact according to claim 1 is characterized in that: the mouth of charhing unit (5) also is connected with one and accepts automatic electrically-charged battery pack (8) automatically.
3. control system of electromagnet without contact according to claim 1 is characterized in that: excitatory demagnetization conversion and control unit (3) comprise driving circuit, executive circuit and relay.
4. control system of electromagnet without contact according to claim 1 is characterized in that: computer logic and control unit (7) comprise Programmable Logic Controller and relay.
5. control system of electromagnet without contact according to claim 1 is characterized in that: load and afterflow protected location (9) comprise magnet coil, current-limiting resistance and electronic switch.
6. control system of electromagnet without contact according to claim 5 is characterized in that: electronic switch wherein is IGBT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200104326U CN201024037Y (en) | 2007-02-02 | 2007-02-02 | Electromagnet contact-free control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200104326U CN201024037Y (en) | 2007-02-02 | 2007-02-02 | Electromagnet contact-free control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201024037Y true CN201024037Y (en) | 2008-02-20 |
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ID=39097891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200104326U Expired - Fee Related CN201024037Y (en) | 2007-02-02 | 2007-02-02 | Electromagnet contact-free control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201024037Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455402A (en) * | 2010-11-02 | 2012-05-16 | 上海华普汽车有限公司 | Rectifier bridge detector |
| CN104876109A (en) * | 2014-02-28 | 2015-09-02 | 大连星航机电设备有限公司 | Protection apparatus for overcurrent or short circuit generated during combination of multiple lifting electromagnets |
-
2007
- 2007-02-02 CN CNU2007200104326U patent/CN201024037Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455402A (en) * | 2010-11-02 | 2012-05-16 | 上海华普汽车有限公司 | Rectifier bridge detector |
| CN102455402B (en) * | 2010-11-02 | 2014-08-13 | 上海华普汽车有限公司 | Rectifier bridge detector |
| CN104876109A (en) * | 2014-02-28 | 2015-09-02 | 大连星航机电设备有限公司 | Protection apparatus for overcurrent or short circuit generated during combination of multiple lifting electromagnets |
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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: 20080220 |