CN205753359U - Motor with real-time tracking overload protection arrangement - Google Patents
Motor with real-time tracking overload protection arrangement Download PDFInfo
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- CN205753359U CN205753359U CN201620622739.0U CN201620622739U CN205753359U CN 205753359 U CN205753359 U CN 205753359U CN 201620622739 U CN201620622739 U CN 201620622739U CN 205753359 U CN205753359 U CN 205753359U
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Abstract
This utility model discloses the motor of a kind of band real-time tracking overload protection arrangement; it it is critical only that: includes motor and apparatus for real time tracking; described apparatus for real time tracking includes electric current real-time monitoring device and voltage real-time monitoring device; described electric current real-time monitoring device monitoring motor input current size; voltage real-time monitoring device monitoring motor input voltage size; described voltage real-time monitoring device and electric current real-time monitoring device are connected with the signal input part of PLC respectively, and the signal output part of described PLC is connected with motor through ON-OFF control circuit.Use the motor of band real-time tracking overload protection arrangement of the present utility model, power input to a machine can be monitored in real time, if motor is overload operation, then can close motor alert notice operator in time.
Description
Technical field
This utility model relates to motor device field, particularly relates to the electricity of a kind of band real-time tracking overload protection arrangement
Machine.
Background technology
In large-size chemical manufacturing enterprise, more (in chemical enterprise, primary electricity using device is a motor producing plant area
Motor), and power is relatively big, more or multiple production plant area shares a transformer-supplied, makes electric moter voltage unstable.Meanwhile, have
Transmission line of electricity long, make on transmission line of electricity loss increase, voltage drop also decreases, in order to ensure that being powered equipment normally supplies
Electricity, it has to promote the output voltage of Circuit Fault on Secondary Transformer.The most just cause system voltage higher, and at the most of chemical industry of China
In manufacturing enterprise, system voltage is the most higher, not the 380V (herein referring to low pressure) known to us, 400V～430V is relatively conventional,
Even up to more than the 450V having.Under these conditions, operator the most do not pay close attention to voltage, still make motor operating current reach
The indicated electric current of motor nameplate, the most in fact motor overload operation, can make electrical machine insulation accelerated ageing, the most overheated burning
Ruin.
Utility model content
For solving above technical problem, this utility model provides the motor of a kind of band real-time tracking overload protection arrangement, logical
Cross and gather the real-time input current of motor and voltage, calculate motor real-time actually enter power, with this specified with motor
Power compares, it is judged that motor whether overload operation.
Technical scheme is as follows:
The motor of a kind of band real-time tracking overload protection arrangement, it it is critical only that: includes apparatus for real time tracking and motor, institute
Stating apparatus for real time tracking and include electric current real-time monitoring device and voltage real-time monitoring device, described electric current real-time monitoring device is monitored
Motor input current size, voltage real-time monitoring device monitoring motor input voltage size；
Described voltage real-time monitoring device and electric current real-time monitoring device are respectively with the signal input part of PLC even
Connecing, the signal output part of described PLC is connected with motor through ON-OFF control circuit.
Use said structure, in the input current of energy motor in real time and voltage input PLC, and calculate electricity
Whether the actual power of machine, finally work overloadingly with the rated power multilevel iudge motor of the motor of input in PLC；If motor
Overwork can cut off motor power in time, it is to avoid motor makes motor winding insulation accelerated ageing, overheated burns.
Further, described ON-OFF control circuit includes threephase switch K and three-phase contactor KM, and described motor power is defeated
Entering end and connect one end of threephase switch K through three-phase contactor KM, the other end of threephase switch K is connected with three phase mains, described three-phase
One termination power of catalyst KM coil, the main contacts of other end contact relay KN, the normally-closed contact ground connection of described relay K N,
The coil one of described relay K N terminates the signal output part of PLC, other end ground connection.
Using said structure, PLC output signal controls disconnection and the Guan Bi of relay K N normally-closed contact, thus controls three-phase
The disconnection of the input current of contactor coil and conducting, control the break-make of three-phase contactor main contacts, reaches to control motor power
The purpose of break-make.
Further, the signal output part of described PLC is also connected with warning circuit, and described warning circuit includes
Buzzer and LED, the signal output part of described PLC respectively with the first audion VT1 and the base stage of the second audion VT2, institute
The colelctor electrode stating the first audion VT1 and the second audion VT2 is all connected with power supply VCC, described first audion VT1 and second
The emitter stage of audion VT2 is respectively through described buzzer and LED ground connection.
Use said structure, can timely alert notice operator during motor overload operating.
Further, described real-time current detection device is current transformer.
Use said structure, the input current of motor can be monitored in real time.
Beneficial effect: use the motor of band real-time tracking overload protection arrangement of the present utility model, can be to the input of motor
Power is monitored in real time, if motor is overload operation, then can close motor alert notice operator in time.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is circuit theory diagrams of the present utility model；
Fig. 3 is the circuit connection diagram of relay and three-phase contactor.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, Figure 2, Figure 3 shows, the motor of a kind of band real-time tracking overload protection arrangement, including apparatus for real time tracking 1
And motor, described apparatus for real time tracking 1 includes electric current real-time monitoring device 2 and voltage real-time monitoring device 3, and described electric current is real-time
Monitoring device 2 monitoring and voltage real-time monitoring device 3 monitoring motor input current and voltage swing the most in real time.
Described voltage real-time monitoring device 3 and electric current real-time monitoring device 2 are respectively with the signal input part of PLC even
Connect, the input voltage of the motor that PLC monitors according to voltage real-time monitoring device 3 and electric current real-time monitoring device 2 and
Galvanometer calculates the actual power of motor, and has inputted the rated power ratio of motor in PLC with motor before working
Relatively, it is judged that whether motor works overloadingly.
Described motor power input connects one end of threephase switch K through three-phase contactor KM, the other end of threephase switch K with
Three phase mains connect, a termination power of described three-phase contactor KM coil, the main contacts of other end contact relay KN, described in continue
The normally-closed contact ground connection of electrical equipment KN, the coil one of described relay K N terminates the signal output part of PLC, another termination
Ground.
The signal output part of described PLC is the most respectively with the base stage of the first audion VT1, the first audion VT1 the most even
Connecing, PLC controls the break-make of the two audion.
The colelctor electrode of described first audion VT1 and the second audion VT2 is all connected with power supply.
If motor overload works, PLC output signal, relay K N coil obtains electric, and the normally closed of relay K N is opened
Closing and disconnect, three-phase contactor KM coil blackout, three-phase contactor KM main contacts disconnects, and motor power is cut off, and motor stops work
Make；First audion VT1 and the second audion VT2 all must conduct, buzzer and LED work, reports to the police to operator.
It is last it should be noted that foregoing description is only preferred embodiment of the present utility model, the common skill of this area
Art personnel, under enlightenment of the present utility model, on the premise of this utility model objective and claim, can make
Represent as multiple types, within such conversion each falls within protection domain of the present utility model.
Claims (4)
1. the motor of a band real-time tracking overload protection arrangement, it is characterised in that: include apparatus for real time tracking (1) and motor,
Described apparatus for real time tracking (1) includes electric current real-time monitoring device (2) and voltage real-time monitoring device (3), and described electric current is real-time
Monitoring device (2) monitoring motor input current size, voltage real-time monitoring device (3) monitoring motor input voltage size；
Described voltage real-time monitoring device (3) and electric current real-time monitoring device (2) are respectively with the signal input part of PLC even
Connecing, the motor of described PLC controls end and is connected with motor through ON-OFF control circuit.
The motor of band real-time tracking overload protection arrangement the most according to claim 1, it is characterised in that: described on-off control electricity
Road includes that threephase switch K and three-phase contactor KM, described motor power input meet the one of threephase switch K through three-phase contactor KM
End, the other end of threephase switch K is connected with three phase mains, a termination power of described three-phase contactor KM coil, another termination
Relay K N normally closed switch one end, described relay K N normally closed switch other end ground connection, the coil one of described relay K N terminates
The signal output part of PLC, other end ground connection.
The motor of band real-time tracking overload protection arrangement the most according to claim 1, it is characterised in that: described electric current is supervised in real time
Surveying device (2) is current transformer.
The motor of band real-time tracking overload protection arrangement the most according to claim 1, it is characterised in that: described PLC
Signal output part be also connected with warning circuit, described warning circuit includes buzzer and LED, the signal alarm of described PLC
End base stage with the first audion VT1 and the second audion VT2 respectively is connected, described first audion VT1 and the second audion
The colelctor electrode of VT2 is all connected with power supply VCC, described first audion VT1 through described buzzer ground connection, the second audion VT2's
Emitter stage is through described LED ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620622739.0U CN205753359U (en) | 2016-06-22 | 2016-06-22 | Motor with real-time tracking overload protection arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620622739.0U CN205753359U (en) | 2016-06-22 | 2016-06-22 | Motor with real-time tracking overload protection arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205753359U true CN205753359U (en) | 2016-11-30 |
Family
ID=57383801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620622739.0U Active CN205753359U (en) | 2016-06-22 | 2016-06-22 | Motor with real-time tracking overload protection arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205753359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112202384A (en) * | 2020-08-25 | 2021-01-08 | 海南广源隆节能环保股份有限公司 | Automatic control safety protection method and device for photoelectric water control system |
-
2016
- 2016-06-22 CN CN201620622739.0U patent/CN205753359U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112202384A (en) * | 2020-08-25 | 2021-01-08 | 海南广源隆节能环保股份有限公司 | Automatic control safety protection method and device for photoelectric water control system |
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| GR01 | Patent grant |