CN2742650Y - Motor protector - Google Patents
Motor protector Download PDFInfo
- Publication number
- CN2742650Y CN2742650Y CN 200420009595 CN200420009595U CN2742650Y CN 2742650 Y CN2742650 Y CN 2742650Y CN 200420009595 CN200420009595 CN 200420009595 CN 200420009595 U CN200420009595 U CN 200420009595U CN 2742650 Y CN2742650 Y CN 2742650Y
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- China
- Prior art keywords
- motor
- head
- water inlet
- motor protector
- temperature detecting
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- 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
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Abstract
The utility model relates to a motor protector, in particular to a transducer actual measurement type motor protector. The utility model adopts a protected-type of directly measuring the information on the electric motor; the electric motor coil is directly provided with a temperature detector head and a motor casing to inspect the leakage current; the electric motor outlet box is provided with a feed water detector head to inspect and get signals; besides, the motor protector adopts a unique coding style and realizes the information transmission only needing the earth connection of the original electric motor so as to achieve the purpose of displaying the problem position according to the type. The utility model has the protection functions of 'lack phase', 'electrical leakage', 'excessive heat', 'Normal', 'feed water' and 'under-pressure' and has the advantages of reliability and security.
Description
Affiliated technical field
The utility model relates to a kind of motor protector, especially a kind of transducer actual measurement formula motor protector.
Background technology
Well-known motor moves easy heating burnout under abnormal conditions.Thousands of for a long time scientific and technical personnel are thinking many ways aspect the useful life that prolongs motor, modal is the operating current that methods such as Current Transformer or series resistor are obtained motor in service, change the fault that size is estimated motor with electric current, as: faults such as stall, overload all are that this mode obtains.Though this mode sensitivity is higher, also have weak point, show that the motor of different capacity just need be provided with different protective currents, improperly will cause misoperation or also reactionless if adjust until burning out motor.The setting meeting of delay time is relevant with factors such as the size of motor power (output), radiating modes, brings difficulty to adjustment.
In order to address the above problem; someone adopts thermal relay to make the protective device of motor; promptly thermal relay is directly installed in the motor; when the temperature that produces when the temperature of motor and thermal relay contact overcurrent surpasses design temperature; the contact is pushed in bimetallic sector-meeting distortion open; cut off the motor power supply, reach the purpose of protection motor.No matter its protection philosophy is which kind of fault of motor and can causes that all motor temperature raises.And the heat-resistant limit of the main cause of burning motor to be motor temperature surpass enamelled wire causes insulation resistance to descend and puncture and burn.If design temperature is located within the highest heat-resistant limit of enamelled wire, just can effectively protect motor not burnt, with the mode of this monitoring temperature protection form, higher safety factor is arranged than " electric current estimation formula ".But because thermal relay itself is exactly the switch of motor operating current, so volume can not be done very for a short time, and can't directly be installed in the middle of the coil, the temperature that is measured and the temperature of coil have bigger difference, give temperature to be set to increase difficulty, regulate and inappropriately still can burn motor.
For this reason, there is the report U.S. to be developed into the thermal relay that can be installed in the motor winding.Though this thermal relay has overcome the shortcoming of the heat conduction generation temperature difference; but because its volume is less; can't use in the too big motor mounting of power; and the heat that produces by electric current of contact still can influence temperature is set; and threephase motor must be installed three thermal relays simultaneously; if three thermal relay temperature-sensitive tripping times are inconsistent, perhaps the contact is burnt adhesion by electric arc and still can be lost protective capability and cause motor to burn.
Summary of the invention
In order to overcome the deficiency of existing motor protector, the utility model provides a kind of transducer actual measurement formula motor protector that directly fault message of test run motor is taken as the leading factor from the motor, can reliably protecting motor safety and personal safety.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of motor protector; by power-supply circuit (1), display screen (8), integrated signal processing controls and display circuit (2), temperature detecting head (3), water inlet detection head (4), detection of electrical leakage head (5), starting switch (6) and close and cancel switch (7) is formed.The input of described power-supply circuit (1) is connected the input of A.C. contactor (13), and output is connected on integrated signal processing controls and the display circuit (2); Display screen (8) is installed in loam cake, and its connecting line is connected with integrated signal processing controls and display circuit (2); Temperature detecting head (3) is contained in the motor winding, and an end joins with any one of motor coil (17), and the other end is connected with an end of water inlet detection head (4); Water inlet detection head (4) is installed between outlet box (15) and the oil pocket (18), and an end is connected with temperature detecting head (3), and an end is connected with the motor earth connection; Detection of electrical leakage head (5) one ends are connected with motor casing (16), and an end is connected with motor earth connection (19).
Motor protector from the above mentioned, described power-supply circuit (1) is capacitance decompression, three phase rectifier, voltage stabilizing, filter circuit.
Motor protector from the above mentioned, described display screen (8) is made up of the semiconductor light emitting integrated package, prefabricated Chinese " normally ", " water inlet ", " moving ", " phase shortage ", " electric leakage ", " overheated ", " under-voltage " Presentation Function in the screen;
Motor protector from the above mentioned, the miniature thermoswitch head that described temperature detecting head (3) is formed 15 * 5 * 4mm by the bimetal leaf of aluminium flake and punching press and 0.2 * 1 * 10mm is contained in the motor winding.
The beneficial effects of the utility model are:
The utility model is the protected mode of straight measurement information on motor creatively; and unique decoding method; only needing to have realized former motor earth connection just can transmit the hope of various information; reaching classifies on display screen shows the purpose of abort situation or reason, and the motor security protection technology is stepped on a new stage.
Description of drawings
Fig. 1 motor protector schematic appearance
Fig. 2 motor protector internal circuit board position view
Fig. 3 motor protector motor and sensing station schematic diagram
Fig. 4 motor protector circuit diagram
1 power-supply circuit among the figure, 2 integrated signals are handled and display circuit, 3 temperature detecting heads, 4 water inlet detection heads, 5 leak source detection heads, 6 starting switches, 7 close and cancel switch, 8 display screens, 9 loam cakes, 10 lower covers, 11 3 core power input lines, 12 four-core power supply output lines, 13 A.C. contactors, 14 outlet boxes, 15 terminal blocks, 16 supports, 17 motor coils, 18 oil pockets, 19 earth connections, 20,21,22 motor power lines
Embodiment
Embodiment 1
A kind of motor protector; by power-supply circuit (1), display screen (8), integrated signal processing controls and display circuit (2), temperature detecting head (3), water inlet detection head (4), detection of electrical leakage head (5), starting switch (6) and close and cancel switch (7) is formed.The input of described power-supply circuit (1) is connected the input of A.C. contactor (13), and output is connected on integrated signal processing controls and the display circuit (2); Display screen (8) is installed in loam cake, and its connecting line is connected with integrated signal processing controls and display circuit (2); Temperature detecting head (3) is contained in the motor winding, and an end joins with any one of motor coil (17), and the other end is connected with an end of water inlet detection head (4); Water inlet detection head (4) is installed between outlet box (15) and the oil pocket (18), and an end is connected with temperature detecting head (3), and an end is connected with the motor earth connection; Detection of electrical leakage head (5) one ends are connected with motor casing (16), and an end is connected with motor earth connection (19).
Motor protector from the above mentioned, described power-supply circuit (1) is capacitance decompression, three phase rectifier, voltage stabilizing, filter circuit.
Motor protector from the above mentioned, described display screen (8) is made up of the semiconductor light emitting integrated package, prefabricated Chinese " normally ", " water inlet ", " moving ", " phase shortage ", " electric leakage ", " overheated ", " under-voltage " Presentation Function in the screen;
Motor protector from the above mentioned, the miniature thermoswitch head that described temperature detecting head (3) is formed 15 * 5 * 4mm by the bimetal leaf of aluminium flake punching press and 0.2 * 1 * 10mm is contained in the motor winding.
D9 is the heat alarm coding among Fig. 4, A connects any phase power supply of motor, C is the temperature control detection head, when motor winding (17) when temperature reaches design temperature (present embodiment is 105 ℃ ± 5 ℃), S8 conducting, electric current are by R3, and R4 flow path U1 to D9 enters A, U1 triggering and conducting S6 lights L2 " overheated " light-emitting block and J1 adhesive JKl-1 is disconnected and turn-offs S2, and the handing-over contactor discharges closes the motor power supply.D8 is that electric leakage signal picks up the coding of holding concurrently, B is connected with motor casing, when leaking off to casing, motor (surpasses 20V), leakage current enters R3, R4 through D8 to U2 and constitutes the loop, U2 is luminous, the S7 triggering and conducting, it is luminous fast to light L3 " electric leakage ", and makes J1 adhesive disconnection JK1-1 close motor current.
D is a water detection head into, be installed between outlet box (14) and the oil pocket (18), when the water inlet of outlet box (14) and oil pocket (18), the U2 that flows through when the U1 that flows through when R3, R4 electric current negative half period, positive half cycle makes U1, U2 luminous conducting simultaneously, the conducting electric current makes N1, Q4, Q3 conducting through D10, D11, light L4 " water inlet " light-emitting block, and make the J2 adhesive, disconnect JK2-1, cut-out is closed the power supply to motor to the power supply of ac contactor coil.
" phase shortage " signal is made up of Z2, R5, Q1, Q2, and voltage descended when its operation principle was phase shortage, and Q1 ends, and the Q2 conducting is lighted L1 " phase shortage " light-emitting block, and made the J1 adhesive, turn-offs A.C. contactor, cuts off the motor power supply.
" under-voltage " principle is similar with " phase shortage ".
K1 is a starting switch: K2 closes and removes switch.
The Chinese display part:
L1-L7 is semiconductor (LED) integrated light-emitting piece among the figure, wherein the L1 light-emitting area is 27 * 17 (mm) redness, the L2 light-emitting area is 27 * 17 (mm) redness, the L3 light-emitting area is 27 * 17 (mm) redness, the L4 light-emitting area is 27 * 17 (mm) redness, the L5 light-emitting area is 27 * 17 (mm) green, the L6 light-emitting area is 32 * 32 (mm) redness, the L7 light-emitting area is that the green .UI-U3 of 27 * 17 (mm) is a photocoupler, K1 is a starting switch, K2 manually shuts down and latch-release, J1, J2 is the miniature 12V relay of dpdt double-pole double-throw (DPDT), D8 is that " electric leakage " signal polarity is handled, and D9 is that " overheated " signal polarity is handled." overheated ", " electric leakage ", " water inlet " signal waveform are seen accompanying drawing 3.
After connecting three-phase 380V AC power, display screen shows " normally ", press the adhesive of K1 starting switch A.C. contactor, motor gets electric work, display screen shows " turning round " when running into fault, and as " overheated ", the bright S6 triggering and conducting of U1 lamp is lighted the L2 display screen and shown " overheated ", the JK1-1 of J1 adhesive simultaneously disconnects the ac contactor coil electric current and turn-offs and discharge, and cuts off S1, S5, the S4 power supply to motor.Other function classes seemingly.
Claims (4)
1, a kind of motor protector, by power-supply circuit (1), display screen (8), integrated signal processing controls and display circuit (2), temperature detecting head (3), water inlet detection head (4), detection of electrical leakage head (5), starting switch (6) and close and cancel switch (7) is formed; It is characterized in that: the input of power-supply circuit (1) is connected the input of A.C. contactor (13), and output is connected on integrated signal processing controls and the display circuit (2); Display screen (8) is installed in loam cake, and its connecting line is connected with integrated signal processing controls and display circuit (2); Temperature detecting head (3) is contained in the motor winding, and an end joins with any one of motor coil (17), and the other end is connected with an end of water inlet detection head (4); Water inlet detection head (4) is installed between outlet box (15) and the oil pocket (18), and an end is connected with temperature detecting head (3), and an end is connected with the motor earth connection; Detection of electrical leakage head (5) one ends are connected with motor casing (16), and an end is connected with motor earth connection (19).
2, motor protector according to claim 1 is characterized in that: power-supply circuit (1) is capacitance decompression, three phase rectifier, voltage stabilizing, filter circuit.
3, motor protector according to claim 1; it is characterized in that: display screen (8) is made up of the semiconductor light emitting integrated package, prefabricated Chinese " normally ", " water inlet ", " moving ", " phase shortage ", " electric leakage ", " overheated ", " under-voltage " Presentation Function in the screen.
4, motor protector according to claim 1 is characterized in that: the miniature thermoswitch head that temperature detecting head (3) is formed 15 * 5 * 4mm by the bimetal leaf of aluminium flake punching press and 0.2 * 1 * 10mm is contained in the motor winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420009595 CN2742650Y (en) | 2004-10-10 | 2004-10-10 | Motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420009595 CN2742650Y (en) | 2004-10-10 | 2004-10-10 | Motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2742650Y true CN2742650Y (en) | 2005-11-23 |
Family
ID=35478115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420009595 Expired - Fee Related CN2742650Y (en) | 2004-10-10 | 2004-10-10 | Motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2742650Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570396A (en) * | 2012-01-19 | 2012-07-11 | 刘立文 | Anti-explosion automatic switch of motor electric leakage early warning device |
| CN106253584A (en) * | 2016-08-24 | 2016-12-21 | 太仓宏璟瑞远物业管理有限公司 | A kind of motor of motor protector |
| CN107680317A (en) * | 2017-09-19 | 2018-02-09 | 河钢股份有限公司邯郸分公司 | A kind of calculator room equipment overtemperature alarm |
-
2004
- 2004-10-10 CN CN 200420009595 patent/CN2742650Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570396A (en) * | 2012-01-19 | 2012-07-11 | 刘立文 | Anti-explosion automatic switch of motor electric leakage early warning device |
| CN102570396B (en) * | 2012-01-19 | 2014-03-12 | 刘立文 | Anti-explosion automatic switch of motor electric leakage early warning device |
| CN106253584A (en) * | 2016-08-24 | 2016-12-21 | 太仓宏璟瑞远物业管理有限公司 | A kind of motor of motor protector |
| CN107680317A (en) * | 2017-09-19 | 2018-02-09 | 河钢股份有限公司邯郸分公司 | A kind of calculator room equipment overtemperature alarm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |