CN205509471U - Air compressor motor protection system - Google Patents
Air compressor motor protection system Download PDFInfo
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- CN205509471U CN205509471U CN201620087953.0U CN201620087953U CN205509471U CN 205509471 U CN205509471 U CN 205509471U CN 201620087953 U CN201620087953 U CN 201620087953U CN 205509471 U CN205509471 U CN 205509471U
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Abstract
The utility model discloses an air compressor motor protection system belongs to compressor control field. An air compressor motor protection system, includes main contactor, main motor, main contactor and main motor install in three -phase circuit, still include the exchangeable detector of electric current, thermodetector, actuating mechanism, electric current display list, wherein the exchangeable detector of electric current set up between main contactor and main motor's three -phase circuit, the current signal of the exchangeable detector of electric current shows through the electric current display list, and in the conveying entry control system, control system and actuating mechanism are connected, control main contactor opening and closing, thermodetector connects main motor, and with in the signal transfer entry control system, control system embeds there is wireless transmission module, control system passes through wireless transmission module and outside mobile terminal wireless connection. It can be realized fast motor protection, and simple structure is with low costs, and have long -range monitoring alarm function.
Description
Technical field
This utility model relates to compressor control field, more particularly, it relates to a kind of air compressor motor protection.
Background technology
Refrigeration compressor includes the electro-motor driving this refrigeration compressor.The electric current that can also include stoping to electro-motor including the system of this refrigeration compressor exceedes one or more device of predetermined value.Such as, breaker protector may be embodied to so that electric current flow through this breaker protector before flowing to electro-motor.Breaker protector can include the electric heater generating heat owing to electric current flows through breaker protector.Breaker protector trips when the electric current flowing through breaker protector is more than predetermined value and forbids that electric current arrives electro-motor.
The most such as, positive temperature coefficient (PTC) device and/or negative temperature coefficient (NTC) device may be embodied as thermally contacting with motor winding, to obtain the temperature relevant to the temperature of motor.It is then possible to use the resistance of PTC device and/or NTC device come directly and motor temperature is determined indirectly.If using PTC device and/or NTC measurement device or the motor temperature that determines more than predetermined temperature, then can take one or more remedial action, such as turn off motor.
Being structure AC generator/alternator for producing a kind of normal method of three AC voltage sources, wherein rotating excitation field passes through three groups of electric wire windings, and often group is separated by 120 degree around the circumference of generator/alternator.Phase voltage refers to stride across the voltage that any one AC voltage source of the one group of electric wire winding etc. in such as AC generator/alternator is measured.Three-phase power can be used for providing power to motor and other devices many.Such as, three-phase power can be used for providing power to the hermetic compressor motor of the motor in such as reciprocating compressor.The winding of motor can be connected to three-phase power line by difference configuration.
Chinese patent application; application number 201180044024.1; publication date 2013-05-08; disclose the system and method for protecting three-phase motor; a kind of for protecting the system of the three-phase electric motor of compressor; described motor receives the first phase, the second phase and third phase from three phase mains, and described system includes single-phase line break protector, the first current sensor and control module.Described single-phase line break protector makes described motor and the first phase disconnect in response to temperature more than predetermined temperature threshold.Described first current sensor measurement electric current by described single-phase line break protector.Described control module determines current value according to measured electric current, and makes described motor and the second phase and third phase disconnect in response to described current value less than or equal to predetermined threshold, but mechanism structure is complicated, and logic is complicated, and cost is high.
Summary of the invention
1. to solve the technical problem that
Complicated for structure present in prior art, the problem that cost is high, the invention provides a kind of air compressor motor protection, it can realize quickly protecting motor, simple in construction, low cost and have long-distance monitoring and alarming function.
2. technical scheme
The purpose of this utility model is achieved through the following technical solutions.
A kind of air compressor motor protection, including main contactor, main motor, main contactor and main motor are installed in three-phase circuit, also include current inductance detector, temperature detector, actuator, electric current display table, wherein said current inductance detector is arranged between the three-phase circuit of main contactor and main motor, the current signal of current inductance detector is shown by electric current display table, and transmit in control system, control system is connected with actuator, control the opening and closing of main contactor, temperature detector connects main motor, and signal transmission is entered in control system, control system is built-in with wireless transport module, control system is by wireless transport module and outside mobile terminal wireless connections.
Further, described control system is PLC.
Further, described control system connects alarm device.It is provided with display alarm and outside alarm bell is reported to the police, can preferably carry out warning and inform.
Further, described control system is connected with main motor, and described main motor is governor motor.When detecting that electric current exceedes set definite value certain limit, control the speed of main motor, keep electric current within normal operation range.
Further, described mobile terminal is mobile phone or panel computer, can be monitored running situation by mobile terminal, can the ruuning situation of monitoring device constantly at the scene away from equipment.
3. beneficial effect
Compared to prior art, it is an advantage of the current invention that:
(1) current detecting link is increased, by actual current during instrument reflection work, it is simple to check three-phase equilibrium, effectively protection motor reliability service；
(2) by temperature detection and the multi-level detection method of current detecting, obtain the running status of motor constantly, and disconnect when breaking down, and report to the police；
(3) there is alarm device by control system connection, be provided with display alarm and outside alarm bell is reported to the police, can preferably carry out warning and inform；
(4) control system is built-in with wireless transport module, control system is by wireless transport module and outside mobile terminal wireless connections, by mobile terminal, running situation can be monitored, can the ruuning situation of monitoring device constantly at the scene away from equipment；
(5) main motor is governor motor.When detecting that motor temperature exceedes set definite value certain limit, PLC controls the speed of main motor, keeps electric current within normal operation range, it is ensured that system stable.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model；
Label declaration in figure:
1, main contactor；2, current inductance detector；3, main motor；4, temperature detector；5, mobile terminal；6, actuator；7, electric current display table.
Detailed description of the invention
Below in conjunction with Figure of description and specific embodiment, this utility model is described in detail.
Embodiment 1
A kind of air compressor motor protection, including main contactor 1, main motor 3, main contactor 1 and main motor 3 are installed in three-phase circuit, main motor 3 is by star triangle start, it is operated in rated voltage 380 volts, also include current inductance detector 2, temperature detector 4, actuator 6, electric current display table 7, wherein said current inductance detector 2 is arranged between the three-phase circuit of main contactor 1 and main motor 3, the current signal of current inductance detector 2 is shown by electric current display table 7, and transmit in control system, described control system is PLC..Described control system connects alarm device.It is provided with display alarm and outside alarm bell is reported to the police, can preferably carry out warning and inform.
Control system is connected with actuator 6, actuator 6 is killer switch, control the opening and closing of main contactor 1, temperature detector 4 connects main motor 3, and signal transmission is entered in control system, control system is built-in with wireless transport module, and control system is mobile phone by the mobile terminal 5 described in mobile terminal 5 wireless connections of wireless transport module with outside.
Heat protection function is passed through in the protection of main motor 3.Add current inductance detector 2, and show in electric current display table 7, how to occur electric current to increase or phase shortage, detector unit commutating voltage changes, PLC controls actuator 6 after processing, and disconnects the main contactor 1 of major loop, effectively controls quitting work of main motor 3.When the heat that temperature detector 4 detects main motor 3 reaches certain threshold value when, also can transmit a signal to control system, control actuator 6 and main motor 3 cuts out.And transmitting a signal to mobile terminal 5 by wireless signal, mobile terminal 5 shows current state and reports to the police.
Work process is as follows, the motor that the main motor in this place 3 uses power to be 50KW, threshold current is 100A, main motor 3 operates in after starting main contactor 1 and works under rated voltage, when there is phase shortage or overcurrent, as exceeded 100A, or when a certain phase current is 0, current inductance detector 2 is to current data, shown by on-the-spot electric current display table 7, reflection size of current, it is simultaneously entered in PLC, carry out computational analysis, will be switched off signal output executing mechanism 6, control to disconnect main contactor 1, make winner's motor 3 autostop, effectively protect main motor 3 intact, and report to the police at the scene, and alarm signal and motor condition signal are transmitted to mobile terminal 5 by wireless module, remotely monitoring field situation, reply in time.When the heat that temperature detector 4 detects main motor 3 reaches certain threshold value when; if design temperature is threshold value at 120 DEG C; when temperature is more than 120 DEG C time; control, in input PLC, to carry out computational analysis, will be switched off signal output executing mechanism 6; control to disconnect main contactor 1; make winner's motor 3 autostop, effectively protect main motor 3 intact, complete the protection to main motor 3.
Embodiment 2
A kind of air compressor motor protection, is installed in three-phase circuit including main contactor 1, main motor 3, main contactor 1 and main motor 3; main motor 3 is by star triangle start; being operated in rated voltage 380 volts, main motor 3 is governor motor, and control system is connected with main motor 3.
System also includes current inductance detector 2, temperature detector 4, actuator 6, electric current display table 7, wherein said current inductance detector 2 is arranged between the three-phase circuit of main contactor 1 and main motor 3, the current signal of current inductance detector 2 is shown by electric current display table 7, and transmitting in control system, described control system is PLC..Described control system connects alarm device.It is provided with display alarm and outside alarm bell is reported to the police, can preferably carry out warning and inform.
Control system is connected with actuator 6, actuator 6 is killer switch, control the opening and closing of main contactor 1, temperature detector 4 connects main motor 3, and signal transmission is entered in control system, control system is built-in with wireless transport module, and control system is panel computer by the mobile terminal 5 described in mobile terminal 5 wireless connections of wireless transport module with outside.
Heat protection function is passed through in the protection of main motor 3.Add current inductance detector 2, and show in electric current display table 7, how to occur electric current to increase or phase shortage, detector unit commutating voltage changes, PLC controls actuator 6 after processing, and disconnects the main contactor 1 of major loop, effectively controls quitting work of main motor 3.When the heat that temperature detector 4 detects main motor 3 reaches certain threshold value when, also can transmit a signal to control system, control actuator 6 and main motor 3 cuts out.And transmitting a signal to mobile terminal 5 by wireless signal, mobile terminal 5 shows current state and reports to the police.
Work process is as follows, the motor that the main motor in this place 3 uses power to be 50KW, threshold current is 100A, main motor 3 operates in after starting main contactor 1 and works under rated voltage, when there is phase shortage or overcurrent, as exceeded 100A, or when a certain phase current is 0, current inductance detector 2 is to current data, shown by on-the-spot electric current display table 7, reflection size of current, it is simultaneously entered in PLC, carry out computational analysis, will be switched off signal output executing mechanism 6, control to disconnect main contactor 1, make winner's motor 3 autostop, effectively protect main motor 3 intact, and report to the police at the scene, and alarm signal and motor condition signal are transmitted to mobile terminal 5 by wireless module, remotely monitoring field situation, reply in time.
When the heat that temperature detector 4 detects main motor 3 reaches certain threshold value when, control system sets, if design temperature is threshold value at 120 DEG C, control system sets main motor 3 speed regulating section, in the certain limit of threshold value, control main motor 3 speed and reduce a part, guarantee system the most overheated, time this place design temperature is 100-120 DEG C, motor speed reduces by 10%, after carrying out a speed governing, no longer carry out speed governing, when temperature continues to be increased beyond 120 DEG C time, control in input PLC, carry out computational analysis, will be switched off signal output executing mechanism 6, control to disconnect main contactor 1, make winner's motor 3 autostop, effectively protect main motor 3 intact, complete the protection to main motor 3.This programme has been effectively ensured the time span of main motor 3 work, ensure that the operational excellence of equipment in the case of not affecting work efficiency, and workload increases, and downtime reduces, and work efficiency increases.
Below being schematically described the invention and embodiment thereof, this description does not has restricted, in the case of without departing substantially from the spirit or essential characteristics of the present invention, it is possible to realize the present invention in other specific forms.Shown in accompanying drawing is also one of embodiment of the invention, and actual structure is not limited thereto, and any reference in claim should not limit involved claim.So, if those of ordinary skill in the art is enlightened by it, in the case of without departing from this creation objective, design the frame mode similar to this technical scheme and embodiment without creative, the protection domain of this patent all should be belonged to.Additionally, " an including " word is not excluded for other elements or step, " one " word before element is not excluded for including " multiple " this element.In claim to a product, multiple elements of statement can also be realized by software or hardware by an element.The first, the second word such as grade is used for representing title, and is not offered as any specific order.
Claims (5)
- null1. an air compressor motor protection，Including main contactor (1)、Main motor (3)，Main contactor (1) and main motor (3) are installed in three-phase circuit，It is characterized in that: also include current inductance detector (2)、Temperature detector (4)、Actuator (6)、Electric current display table (7)，Wherein said current inductance detector (2) is arranged between the three-phase circuit of main contactor (1) and main motor (3)，The current signal of current inductance detector (2) is shown by electric current display table (7)，And transmit in control system，Control system is connected with actuator (6)，Control the opening and closing of main contactor (1)，Temperature detector (4) connects main motor (3)，And signal transmission is entered in control system，Control system is built-in with wireless transport module，Control system is by wireless transport module and outside mobile terminal (5) wireless connections.
- A kind of air compressor motor protection the most according to claim 1, it is characterised in that: described control system is PLC.
- A kind of air compressor motor protection the most according to claim 1, it is characterised in that: described control system connects alarm device.
- A kind of air compressor motor protection the most according to claim 1, it is characterised in that: described main motor (3) is governor motor, and control system is connected with main motor (3).
- 5. according to a kind of air compressor motor protection described in claim 1 or 4, it is characterised in that: described mobile terminal (5) is mobile phone or panel computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620087953.0U CN205509471U (en) | 2016-01-27 | 2016-01-27 | Air compressor motor protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620087953.0U CN205509471U (en) | 2016-01-27 | 2016-01-27 | Air compressor motor protection system |
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| CN205509471U true CN205509471U (en) | 2016-08-24 |
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| CN201620087953.0U Active CN205509471U (en) | 2016-01-27 | 2016-01-27 | Air compressor motor protection system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100833A (en) * | 2017-05-24 | 2017-08-29 | 泰州年糕房车技术有限公司 | A kind of compressor protector |
| CN108418183A (en) * | 2018-04-08 | 2018-08-17 | 广东美的暖通设备有限公司 | Control method, motor unit, heat pump system and the storage medium of motor unit |
| CN115053067A (en) * | 2020-02-05 | 2022-09-13 | 沃尔沃卡车集团 | Method for operating an electric air compressor assembly |
-
2016
- 2016-01-27 CN CN201620087953.0U patent/CN205509471U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100833A (en) * | 2017-05-24 | 2017-08-29 | 泰州年糕房车技术有限公司 | A kind of compressor protector |
| CN108418183A (en) * | 2018-04-08 | 2018-08-17 | 广东美的暖通设备有限公司 | Control method, motor unit, heat pump system and the storage medium of motor unit |
| CN108418183B (en) * | 2018-04-08 | 2020-03-06 | 广东美的暖通设备有限公司 | Control method of motor unit, heat pump system and storage medium |
| CN115053067A (en) * | 2020-02-05 | 2022-09-13 | 沃尔沃卡车集团 | Method for operating an electric air compressor assembly |
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