CN201909792U - Intelligent switch-off rotating speed tester for centrifugal switch - Google Patents
Intelligent switch-off rotating speed tester for centrifugal switch Download PDFInfo
- Publication number
- CN201909792U CN201909792U CN2011200150528U CN201120015052U CN201909792U CN 201909792 U CN201909792 U CN 201909792U CN 2011200150528 U CN2011200150528 U CN 2011200150528U CN 201120015052 U CN201120015052 U CN 201120015052U CN 201909792 U CN201909792 U CN 201909792U
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- sine
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- signal amplifier
- microprocessor
- centrifugal switch
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- Expired - Lifetime
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Abstract
The utility model relates to an intelligent switch-off rotating speed tester for a centrifugal switch, belongs to the technical field of detection and solves the problems that the existing tester has low test accuracy and is unsuitable for factory online detection of a motor. The intelligent switch-off rotating speed tester for the centrifugal switch comprises a shell. The surface of the shell is provided with an external power supply interface, a motor power supply connection port and an input and output device. A variable frequency sine-wave generator, a signal amplifier and a microprocessor are arranged inside the shell. After being amplified by the signal amplifier, a sine wave generated by the variable frequency sine-wave generator is conveyed to a variable frequency constant low voltage sine-wave power supply of a single-phase motor. The microprocessor controls the variable frequency sine-wave generator to continuously increase the frequency of the sine wave. When the centrifugal switch is switched off, a current flowing through the signal amplifier is changed abruptly and is fed back to the microprocessor and a rotating speed value is displayed through the input and output device. The tester has the advantages that the tester has high measurement accuracy and is particularly suitable for factory online detection of the motor.
Description
Technical field
The utility model belongs to the detection technique field, refers in particular to a kind of intelligent breaking speed of centrifugal switch tester.
Background technology
The breaking speed of centrifugal switch test is the essential items for inspection of motor delivery test.The breaking speed of centrifugal switch parameter is that the examination monopole asynchronous motor is in the energized starting process, centrifugal switch can the regulation the range of speeds in effective action, in time disconnect starting capacitance, make monophase machine reach the optimum start-up state and guarantee that motor can safe operation.Be that strict regulation is arranged to this parameter control in the national standard, the breaking speed of centrifugal switch the motor synchronous rotating speed 70%～85% between the time be qualified.There are measuring methods such as adopting tachometer torquemeter method and drawing method to carry out test at present to breaking speed of centrifugal switch, but all exist some problems: mainly be complex structure, problems such as complex operation and accuracy of measurement are not high, and be not suitable for the online detection of dispatching from the factory of motor.
Summary of the invention
The purpose of this utility model provides and a kind ofly can improve breaking speed of centrifugal switch accuracy of test and compact conformation and be suitable for the intelligent breaking speed of centrifugal switch tester of the online detection of Motor Production Test.
The purpose of this utility model is achieved in that intelligent breaking speed of centrifugal switch tester, comprise shell, case surface is provided with the external power source interface, the motor power connector, input-output unit, it is characterized in that: portion is equipped with the frequency conversion sine-wave generator in the enclosure, signal amplifier and microprocessor, described frequency conversion sine-wave generator, signal amplifier is connected with microprocessor with input-output unit, the frequency conversion sine-wave generator is connected with the motor power connector by signal amplifier, the sine wave that the frequency conversion sine-wave generator produces flows to the constant low-voltage sine-wave power of monophase machine one frequency conversion by the motor power connector after signal amplifier amplifies, microprocessor control of conversion sine-wave generator continuity ground increases sinusoidal wave frequency, when centrifugal switch disconnects, the electric current in the signal amplifier of flowing through is undergone mutation and is given microprocessor with the current break signal feedback, described microprocessor will this moment the output frequency of signal amplifier show by input-output unit after converting tachometer value to and carrying out the correction of rotating speed deviate, the control of conversion sine-wave generator is exported to monophase machine work by the motor normal working voltage value of setting to microprocessor in advance and frequency values by signal amplifier and the electric flux signal of monophase machine work is shown by input-output unit or the control signal amplifier quits work simultaneously.
Above-mentioned input-output unit comprises LCDs, startup/stop button and a plurality of input button in order to input parameter information, and described LCDs, startup/stop button and input button all are connected with above-mentioned microprocessor.
Above-mentioned electric flux signal comprises magnitude of voltage, current value and the power input to a machine value of monophase machine.
The outstanding compared to existing technology advantage of the utility model is:
1, the utility model is imported its frequency to the monophase machine that will detect and can progressively be become big sine-wave power by little continuity ground, the incoming frequency to monophase machine when centrifugal switch is disconnected converts tachometer value to and carries out drift correction, its revised tachometer value is exported by LCDs, and this test mode is more easy, accurate;
2, the utility model is simple to the test philosophy of the breaking speed of centrifugal switch of monophase machine, and compact conformation easy to operately and special is suitable for the online detection of dispatching from the factory of motor;
3, the utility model can make its frequency that is input on the monophase machine reach successional progressively increase, and not saltus step has improved the accuracy to the breaking speed of centrifugal switch test.
4, the utility model can have been saved detection station and time to motor in the detection of motor breaking speed of centrifugal switch test finishing back being carried out continuously to this motor electric flux, improves motor production efficiency;
5, the utility model is by motor normal working voltage and the frequency values set to microprocessor in advance, the power supply of exporting to this monophase machine work after amplifying by signal amplifier is the pure sine wave power supply of a constant voltage constant frequency, has improved the measuring accuracy that the motor electric flux detects;
6, the leakage field that has winding overhang during the monophase machine coil electricity disturbs, so can produce bigger error when under the no power situation, carrying out the single-phase motor centrifugal switch breaking speed tested, and this tester is the test of carrying out under the situation of monophase machine energising the single-phase motor centrifugal switch breaking speed, it has comprised the leakage field interference, thereby has improved measuring accuracy.
Description of drawings
Fig. 1 is a principle schematic of the present utility model.
Embodiment
The utility model is further described with specific embodiment below in conjunction with accompanying drawing, referring to Fig. 1:
Intelligence breaking speed of centrifugal switch tester, comprise shell, case surface is provided with the external power source interface, the motor power connector, input-output unit, it is characterized in that: portion is equipped with the frequency conversion sine-wave generator in the enclosure, signal amplifier and microprocessor, described frequency conversion sine-wave generator, signal amplifier is connected with microprocessor with input-output unit, the frequency conversion sine-wave generator is connected with the motor power connector by signal amplifier, the sine wave that the frequency conversion sine-wave generator produces flows to the constant low-voltage sine-wave power of monophase machine one frequency conversion by the motor power connector after signal amplifier amplifies, microprocessor control of conversion sine-wave generator continuity ground increases sinusoidal wave frequency, when centrifugal switch disconnects, the electric current in the signal amplifier of flowing through is undergone mutation and is given microprocessor with the current break signal feedback, described microprocessor will this moment the output frequency of signal amplifier show by input-output unit after converting tachometer value to and carrying out the correction of rotating speed deviate, the control of conversion sine-wave generator is exported to monophase machine work by the motor normal working voltage value of setting to microprocessor in advance and frequency values by signal amplifier and the electric flux signal of monophase machine work is shown by input-output unit or the control signal amplifier quits work simultaneously.
Above-mentioned input-output unit comprises LCDs, startup/stop button and a plurality of input button in order to input parameter information, and described LCDs, startup/stop button and input button all are connected with above-mentioned microprocessor.
Above-mentioned electric flux signal comprises magnitude of voltage, current value and the power input to a machine value of monophase machine.
Among Fig. 1, C1 is running electric capacity, and C2 is a starting capacitance, and K is a centrifugal switch, and L1 is the principal phase winding, and L2 is the parafacies winding.
This tester is when work, extraneous power supply is connected on to power on the external power source interface gives this tester, monophase machine is connected on this tester by the motor power connector, its frequency of exporting tester arrives the constant low-voltage sine-wave power of big continuity increase from childhood to monophase machine work, when the frequency of exporting to monophase machine increases to certain value (when rotating speed increases to certain value), centrifugal switch is got rid of under centrifugal action and is separated from, centrifugal switch K disconnects, work together to become by original running capacitor C 1 and starting capacitance C2 parallel connection this moment and have only 1 work of running capacitor C, promptly sport present revolution electric current by original starting current, signal amplifier is given microprocessor with the current break signal feedback, the microprocessor output frequency of signal amplifier at this moment converts tachometer value to and carries out drift correction, its revised tachometer value shows by LCDs, the tachometer value that shows on LCDs is exactly the breaking speed of single-phase motor centrifugal switch, and Computer Corp. of breaking speed of centrifugal switch is as follows:
Wherein, n is the breaking speed of centrifugal switch value, and f inputs to the low pressure sine wave freuqency of monophase machine when being the centrifugal switch disconnection, and p is the monophase machine number of pole-pairs, and Δ t is the rotating speed deviate.
When centrifugal switch disconnected, this tester can be controlled monophase machine and quit work, and this moment, microprocessor control signal amplifier stopped out-put supply to monophase machine; The sine-wave power that also can follow the magnitude of voltage 220V of continuous output monophase machine operate as normal and frequency values 50HZ is to monophase machine work, and microprocessor shows the current value and the monophase machine power input value of monophase machine operate as normal by LCDs.In actual test job process, all right peripheral hardware one digitron display screen, digitron display screen is connected with microprocessor, and digitron display screen has the Presentation Function equal with LCDs, is convenient to tester's remote watching test result.
Voltage, electric current and frequency that tester is exported to monophase machine can both show on LCDs, the number of pole-pairs of monophase machine, rotating speed higher limit, rotating speed lower limit also have rotating speed deviate etc. also can both to show on LCDs, and LCDs can also show the rotation speed change value of monophase machine.The difference of the actual speed value of rotating speed deviation when to be this tester to this single-phase motor centrifugal switch breaking speed test value and single-phase motor centrifugal switch disconnect, its rotating speed deviate can be revised automatically by the tachometer value that the input button is input in this tester when centrifugal switch disconnected, thereby has improved this tester greatly to single-phase motor centrifugal switch breaking speed accuracy of test by the automatic correction of rotating speed deviate.The number of pole-pairs of monophase machine, rotating speed higher limit, rotating speed lower limit and rotating speed deviate can be input in this tester and by LCDs by the input button and show, when the single-phase motor centrifugal switch breaking speed value of testing is lower than the rotating speed lower limit or is higher than the rotating speed higher limit, after test finished, this tester can send the underproof alarm sound of breaking speed of centrifugal switch of this monophase machine of prompting.
The foregoing description is preferred embodiment of the present utility model only, is not to limit protection domain of the present utility model according to this, so: all equivalences of doing according to structure of the present utility model, shape, principle change, and all should be covered by within the protection domain of the present utility model.
Claims (3)
1. intelligent breaking speed of centrifugal switch tester, comprise shell, case surface is provided with the external power source interface, the motor power connector, input-output unit, it is characterized in that: portion is equipped with the frequency conversion sine-wave generator in the enclosure, signal amplifier and microprocessor, described frequency conversion sine-wave generator, signal amplifier is connected with microprocessor with input-output unit, the frequency conversion sine-wave generator is connected with the motor power connector by signal amplifier, the sine wave that the frequency conversion sine-wave generator produces flows to the constant low-voltage sine-wave power of monophase machine one frequency conversion by the motor power connector after signal amplifier amplifies, microprocessor control of conversion sine-wave generator continuity ground increases sinusoidal wave frequency, when centrifugal switch disconnects, the electric current in the signal amplifier of flowing through is undergone mutation and is given microprocessor with the current break signal feedback, described microprocessor will this moment the output frequency of signal amplifier show by input-output unit after converting tachometer value to and carrying out the correction of rotating speed deviate, the control of conversion sine-wave generator is exported to monophase machine work by the motor normal working voltage value of setting to microprocessor in advance and frequency values by signal amplifier and the electric flux signal of monophase machine work is shown by input-output unit or the control signal amplifier quits work simultaneously.
2. intelligent breaking speed of centrifugal switch tester according to claim 1, it is characterized in that: described input-output unit comprises LCDs, startup/stop button and a plurality of input button in order to input parameter information, and described LCDs, startup/stop button and input button all are connected with above-mentioned microprocessor.
3. intelligent breaking speed of centrifugal switch tester according to claim 1 and 2 is characterized in that: described electric flux signal comprises magnitude of voltage, current value and the power input to a machine value of monophase machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200150528U CN201909792U (en) | 2011-01-18 | 2011-01-18 | Intelligent switch-off rotating speed tester for centrifugal switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200150528U CN201909792U (en) | 2011-01-18 | 2011-01-18 | Intelligent switch-off rotating speed tester for centrifugal switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201909792U true CN201909792U (en) | 2011-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200150528U Expired - Lifetime CN201909792U (en) | 2011-01-18 | 2011-01-18 | Intelligent switch-off rotating speed tester for centrifugal switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201909792U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116776A (en) * | 2011-01-18 | 2011-07-06 | 金米友 | Intelligent centrifugal switch turn-off rotation speed tester |
| CN105137115A (en) * | 2014-05-29 | 2015-12-09 | 浙江和超电机有限公司 | Single-phase asynchronous motor centrifugal switch contact breaking rotation speed tester |
-
2011
- 2011-01-18 CN CN2011200150528U patent/CN201909792U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116776A (en) * | 2011-01-18 | 2011-07-06 | 金米友 | Intelligent centrifugal switch turn-off rotation speed tester |
| CN102116776B (en) * | 2011-01-18 | 2012-09-19 | 金米友 | Intelligent centrifugal switch turn-off rotation speed tester |
| CN105137115A (en) * | 2014-05-29 | 2015-12-09 | 浙江和超电机有限公司 | Single-phase asynchronous motor centrifugal switch contact breaking rotation speed tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110727 Effective date of abandoning: 20120919 |