CN109541252A - A kind of rotatation speed test method of motor - Google Patents
A kind of rotatation speed test method of motor Download PDFInfo
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- CN109541252A CN109541252A CN201811348956.5A CN201811348956A CN109541252A CN 109541252 A CN109541252 A CN 109541252A CN 201811348956 A CN201811348956 A CN 201811348956A CN 109541252 A CN109541252 A CN 109541252A
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- motor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
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- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The invention discloses a kind of rotatation speed test methods of motor, it include magnetic field sensor, amplifying circuit, high-frequency signal filter, voltage zero-cross comparison circuit, frequency calculation circuit and frequency multiplier circuit, specific rotatation speed test method is the following steps are included: arrange a magnetic field sensor by the surrounding in motor to obtain the alternating electromagnetic field, the alternating electromagnetic field is converted into a faint ac signal, amplifying circuit amplifies mode by using automatic gain, the faint ac signal that magnetic field sensor is detected carries out automatic gain amplification.The present invention is compared with traditional non-contact measurement for rotation speed, this method does not need to install reflective object in tested motor, it uses more convenient, cost is lower, requirement to installation site is lower, the occasion of all motor speed tests is suitable for almost, if motor rotating part is without under exposed extreme test occasion, traditional measurement method is almost unable to complete measurement, and this method can be still applicable in.
Description
Technical field
The present invention relates to a kind of motor field, in particular to a kind of rotatation speed test method of motor.
Background technique
Motor refers to that a kind of calutron that electric energy conversion or transmitting are realized according to the law of electromagnetic induction, motor are now wide
It is general to apply to every field, it is even more indispensable in some mechanical manufacturing fields, and motor is when in use, require by
Accurate measurement of rotating speed could put into normal use, and existing rotatation speed test method needs to carry out contact installation, measurement accuracy
It is not high, the occasion of all motor speeds test can not be suitable for.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the defects of the prior art, provide a kind of measurement of rotating speed side of motor
Method, compared with traditional non-contact measurement for rotation speed, this method does not need to install reflective object in tested motor, uses more
Convenient, cost is lower, and the requirement to installation site is lower, is suitable for almost the occasion of all motor speed tests, as motor revolves
Without under exposed extreme test occasion, traditional measurement method is almost unable to complete measurement for transfer part point, and this method still can be with
It is applicable in.
In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions:
A kind of rotatation speed test method of motor of the present invention, includes magnetic field sensor, amplifying circuit, high-frequency signal filter, electricity
Press through zero balancing circuit, frequency calculation circuit and frequency multiplier circuit, specific rotatation speed test method the following steps are included:
A. when motor operates, faint alternating electromagnetic field is generated in four weekly assemblies of motor, arranges one by the surrounding in motor
A magnetic field sensor obtains the alternating electromagnetic field, which is converted to a faint ac signal；
B. amplifying circuit is by using automatic gain amplification mode, the faint ac signal that magnetic field sensor is detected,
Automatic gain amplification is carried out, so that the amplitude of ac signal is about 5V；
C. amplified ac signal introduces high-frequency signal filter, by high-frequency signal filter circuit first by amplified exchange
Some other high-frequency interferencing signals that many motor operatings generate can be mixed into electric signal to be filtered out, so that output is true
It can be with the ac signal of real time reaction motor speed；
D. ac signal is turned by carrying out Zero-cross comparator to filtered ac signal by voltage zero-cross comparison circuit
Pulse signal is changed into, so that subsequent digital circuits section can be used；
E. again frequency calculation circuit by way of clock synchronization, pulse signal is converted into the digital pulse signal of rule
Output；
F. digital pulse signal is carried out according to the motor pole number and reduction ratio parameter that are arranged on corresponding motor by frequency multiplier circuit
Process of frequency multiplication allows the real-time revolving speed of signal pulse number and motor at the corresponding relationship of 60:1, when finally use, need to only measure
The pulse frequency of the signal of frequency multiplier circuit output, can be obtained the real-time revolving speed of motor.
Compared with prior art, beneficial effects of the present invention are as follows:
Compared with traditional non-contact measurement for rotation speed, this method does not need to install reflective object in tested motor the present invention, makes
Use more convenient, cost is lower, and the requirement to installation site is lower, it is suitable for almost the occasion of all motor speeds tests,
If motor rotating part is without under exposed extreme test occasion, traditional measurement method is almost unable to complete measurement, and this method
It can still be applicable in.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is overall structure diagram of the invention；
In figure: 1, magnetic field sensor；2, amplifying circuit；3, high-frequency signal filter；4, voltage zero-cross comparison circuit；5, frequency meter
Calculate circuit；6, frequency multiplier circuit.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Wherein identical label all refers to identical component in attached drawing.
Embodiment 1
As shown in Figure 1, the present invention provides a kind of rotatation speed test method of motor, it include magnetic field sensor 1, amplifying circuit 2, height
Frequency signal filter 3, voltage zero-cross comparison circuit 4, frequency calculation circuit 5 and frequency multiplier circuit 6, specific rotatation speed test method include
Following steps:
A. when motor operates, faint alternating electromagnetic field is generated in four weekly assemblies of motor, arranges one by the surrounding in motor
A magnetic field sensor 1 obtains the alternating electromagnetic field, which is converted to a faint ac signal；
B. amplifying circuit 2 is by using automatic gain amplification mode, the faint ac signal that magnetic field sensor is detected,
Automatic gain amplification is carried out, so that the amplitude of ac signal is about 5V；
C. amplified ac signal introduces high-frequency signal filter 3, by high-frequency signal filter circuit first by amplified friendship
Some other high-frequency interferencing signals that many motor operatings generate can be mixed into galvanic electricity signal to be filtered out, so that output is true
Can be with the ac signal of real time reaction motor speed；
D. ac signal is turned by carrying out Zero-cross comparator to filtered ac signal by voltage zero-cross comparison circuit
Pulse signal is changed into, so that subsequent digital circuits section can be used；
E. again frequency calculation circuit 5 by way of clock synchronization, the digit pulse that pulse signal is converted into rule is believed
Number output；
F. by frequency multiplier circuit 6 according to the motor pole number and reduction ratio parameter being arranged on corresponding motor, to digital pulse signal into
Row process of frequency multiplication allows the real-time revolving speed of signal pulse number and motor when finally use, only to need to survey at the corresponding relationship of 60:1
The pulse frequency for obtaining the signal of frequency multiplier circuit output, can be obtained the real-time revolving speed of motor.
Specifically, arranging a magnetic field sensor 1 by the surrounding of the motor in operating to obtain the alternating electromagnetism first
, which is converted into a faint ac signal, is then put by amplifying circuit 2 by using automatic gain
Big mode, the faint ac signal that magnetic field sensor is detected carry out automatic gain amplification, so that ac signal
Amplitude is about 5V, and amplified ac signal is then introduced high-frequency signal filter 3, first will by high-frequency signal filter circuit
Some other high-frequency interferencing signals that many motor operatings generate can be mixed into amplified ac signal to be filtered out, from
And output really can be with the ac signal of real time reaction motor speed, by voltage zero-cross comparison circuit, after to filtering
Ac signal, carry out Zero-cross comparator, ac signal is converted into pulse signal, so that subsequent digital circuits section can
To use；Again through frequency calculation circuit 5 by way of clock synchronization, the digit pulse that pulse signal is converted into rule is believed
Number output；By frequency multiplier circuit 6 according to the motor pole number and reduction ratio parameter being arranged on corresponding motor, to digital pulse signal into
Row process of frequency multiplication allows the real-time revolving speed of signal pulse number and motor at the corresponding relationship of 60:1, when subsequent use, only needs to survey
The pulse frequency for obtaining the signal of frequency multiplier circuit output, can be obtained the real-time revolving speed of motor.
In conclusion the present invention, compared with traditional non-contact measurement for rotation speed, this method does not need to pacify in tested motor
Reflective object is filled, uses more convenient, cost is lower, and the requirement to installation site is lower, is suitable for almost all motors and turns
The occasion of speed test, if motor rotating part is without under exposed extreme test occasion, traditional measurement method is almost unable to complete
Measurement, and this method can be still applicable in.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (1)
1. a kind of rotatation speed test method of motor, which is characterized in that include magnetic field sensor (1), amplifying circuit (2), high frequency
Traffic filter (3), voltage zero-cross comparison circuit (4), frequency calculation circuit (5) and frequency multiplier circuit (6), specific measurement of rotating speed side
Method the following steps are included:
A. when motor operates, faint alternating electromagnetic field is generated in four weekly assemblies of motor, arranges one by the surrounding in motor
A magnetic field sensor (1) obtains the alternating electromagnetic field, which is converted to a faint ac signal；
B. amplifying circuit (2) amplifies mode, the faint exchange telecommunications that magnetic field sensor is detected by using automatic gain
Number, automatic gain amplification is carried out, so that the amplitude of ac signal is about 5V；
C. amplified ac signal introduces high-frequency signal filter (3), first will be amplified by high-frequency signal filter circuit
Some other high-frequency interferencing signals that many motor operatings generate can be mixed into ac signal to be filtered out, so that output is true
Real can be with the ac signal of real time reaction motor speed；
D. ac signal is turned by carrying out Zero-cross comparator to filtered ac signal by voltage zero-cross comparison circuit
Pulse signal is changed into, so that subsequent digital circuits section can be used；
E. again frequency calculation circuit (5) by way of clock synchronization, pulse signal is converted into the digit pulse of rule
Signal output；
F. by frequency multiplier circuit (6) according to the motor pole number and reduction ratio parameter being arranged on corresponding motor, to digital pulse signal
Process of frequency multiplication is carried out, allows the real-time revolving speed of signal pulse number and motor at the corresponding relationship of 60:1, when finally use, is only needed
The pulse frequency for measuring the signal of frequency multiplier circuit output, can be obtained the real-time revolving speed of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811348956.5A CN109541252A (en) | 2018-11-13 | 2018-11-13 | A kind of rotatation speed test method of motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811348956.5A CN109541252A (en) | 2018-11-13 | 2018-11-13 | A kind of rotatation speed test method of motor |
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| CN109541252A true CN109541252A (en) | 2019-03-29 |
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| CN201811348956.5A Pending CN109541252A (en) | 2018-11-13 | 2018-11-13 | A kind of rotatation speed test method of motor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113866634A (en) * | 2021-10-25 | 2021-12-31 | 广州蓝水环境设备科技有限公司 | Motor detection device and method and motor detector |
| CN113884877A (en) * | 2021-09-14 | 2022-01-04 | 江伟 | Motor fault data acquisition module suitable for motor variable speed operation mode |
| CN113960470A (en) * | 2021-08-24 | 2022-01-21 | 北京金风慧能技术有限公司 | Method and device for detecting shaft current of generator |
| CN114487946A (en) * | 2021-12-15 | 2022-05-13 | 捷飞特（大连）工业技术有限公司 | Sensor system for non-contact measurement of weak leakage motor |
| CN114578084A (en) * | 2022-03-07 | 2022-06-03 | 上海锦科电气科技有限公司 | Motor rotating speed testing method and device and readable storage medium |
| WO2022247051A1 (en) * | 2021-05-25 | 2022-12-01 | 精进电动科技股份有限公司 | Method and circuit for redundancy detection of motor rotational speed, and motor controller |
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| CN1036268A (en) * | 1988-03-31 | 1989-10-11 | 海德堡印刷机械股份公司 | Measure the method and the device of rotating speed |
| US20070021897A1 (en) * | 2005-07-25 | 2007-01-25 | Sin Etke Technology Co., Ltd. | Speedometer and motor vehicle arrangement |
| CN201965145U (en) * | 2010-12-03 | 2011-09-07 | 中国南方航空工业(集团)有限公司 | Rotating speed measuring conditioning device and engine |
| CN102778580A (en) * | 2012-07-23 | 2012-11-14 | 西安理工大学 | Method for detecting speed of permanent-magnetic synchronous motor |
| CN103235152A (en) * | 2013-04-17 | 2013-08-07 | 苏州奥科姆自动化科技有限公司 | Fan rotating speed test method |
| CN103580453A (en) * | 2013-11-15 | 2014-02-12 | 深圳市易驱电气有限公司 | Frequency converter with rotating speed tracking function and rotating speed tracking method with the frequency converter |
| CN104345170A (en) * | 2013-07-29 | 2015-02-11 | 王启平 | Hydraulic generator rotating speed measuring system |
| CN107612435A (en) * | 2017-09-11 | 2018-01-19 | 珠海格力节能环保制冷技术研究中心有限公司 | Computational methods and device, the storage medium and processor of motor rotor speed |
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2018
- 2018-11-13 CN CN201811348956.5A patent/CN109541252A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1036268A (en) * | 1988-03-31 | 1989-10-11 | 海德堡印刷机械股份公司 | Measure the method and the device of rotating speed |
| US20070021897A1 (en) * | 2005-07-25 | 2007-01-25 | Sin Etke Technology Co., Ltd. | Speedometer and motor vehicle arrangement |
| CN201965145U (en) * | 2010-12-03 | 2011-09-07 | 中国南方航空工业(集团)有限公司 | Rotating speed measuring conditioning device and engine |
| CN102778580A (en) * | 2012-07-23 | 2012-11-14 | 西安理工大学 | Method for detecting speed of permanent-magnetic synchronous motor |
| CN103235152A (en) * | 2013-04-17 | 2013-08-07 | 苏州奥科姆自动化科技有限公司 | Fan rotating speed test method |
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| CN103580453A (en) * | 2013-11-15 | 2014-02-12 | 深圳市易驱电气有限公司 | Frequency converter with rotating speed tracking function and rotating speed tracking method with the frequency converter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022247051A1 (en) * | 2021-05-25 | 2022-12-01 | 精进电动科技股份有限公司 | Method and circuit for redundancy detection of motor rotational speed, and motor controller |
| CN113960470A (en) * | 2021-08-24 | 2022-01-21 | 北京金风慧能技术有限公司 | Method and device for detecting shaft current of generator |
| CN113884877A (en) * | 2021-09-14 | 2022-01-04 | 江伟 | Motor fault data acquisition module suitable for motor variable speed operation mode |
| CN113866634A (en) * | 2021-10-25 | 2021-12-31 | 广州蓝水环境设备科技有限公司 | Motor detection device and method and motor detector |
| CN114487946A (en) * | 2021-12-15 | 2022-05-13 | 捷飞特（大连）工业技术有限公司 | Sensor system for non-contact measurement of weak leakage motor |
| CN114578084A (en) * | 2022-03-07 | 2022-06-03 | 上海锦科电气科技有限公司 | Motor rotating speed testing method and device and readable storage medium |
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Application publication date: 20190329 |
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