CN102621491A - Motor parameter detector - Google Patents

Motor parameter detector Download PDF

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Publication number
CN102621491A
CN102621491A CN2012100861552A CN201210086155A CN102621491A CN 102621491 A CN102621491 A CN 102621491A CN 2012100861552 A CN2012100861552 A CN 2012100861552A CN 201210086155 A CN201210086155 A CN 201210086155A CN 102621491 A CN102621491 A CN 102621491A
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CN
China
Prior art keywords
module
parameter
sensor
dsp chip
links
Prior art date
Application number
CN2012100861552A
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Chinese (zh)
Inventor
潘海鹏
顾敏明
姚俊
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浙江理工大学
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Priority to CN2012100861552A priority Critical patent/CN102621491A/en
Publication of CN102621491A publication Critical patent/CN102621491A/en

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Abstract

The invention discloses a motor parameter detector to solve the technical problem of real-time detection of motor parameters. The detector comprises a hardware platform composed of a central processing unit (CPU) micro control unit (MCU) module, a measurement module, a display module, a communication module and the like. A C8051F340 single chip microcomputer serving as the CPU forms a main control circuit, wherein the single chip microcomputer is connected with a digital signal processor (DSP) chip for power energy metering through a software process improvement (SPI) bus, is connected with a torque sensor, a rotation speed sensor, a winding temperature rising sensor, a liquid crystal display (LCD) screen, a keyboard and a relevant interface circuit, and communicates with principal computer (PC) software through a 485 network, so that further analysis and management of uploaded data are achieved on computers, and a human-computer interaction is achieved; and the DSP chip for power energy metering is connected with a voltage transformer and a current transformer so as to detect three-phase voltage and current signals. The motor parameter detector has the advantages of being capable of collecting electrical parameters for alternating current induction motors and synchronous motors, high in automation degree, and simple to operate, and guaranteeing the accuracy of measurement results and the stability of the system operation on the basis of increasing the instrument operation speed.

Description

A kind of parameter of electric machine detector

Technical field

The present invention relates to a kind of parameter of electric machine detector.

Background technology

Early stage domestic each manufacturer all adopts conventional electrical instrument to measure when carrying out electromechanical testing, and its working method all adopts manual operations, artificial reading, manual record, artificial treatment data.Its shortcoming is to can't directly measuring such as some parameters such as rotational speed and torques, and error is very big, inefficiency, and measurement data is dispersed big, and the measurement result precision is low, and real-time is not high.

The development of Along with computer technology; The appearance of large scale integrated circuit and microprocessor; Motor Measuring Technology has got into the microcomputer testing stage; Domestic general Motor Measuring System is the center basically with the computing machine at present, and a series of instruments such as control electric weight appearance, dynamometer machine, temperature measurer carry out the detection of the parameter of electric machine.Computing machine motor test macro has that measuring speed is fast, precision is high, real-time, advantage such as the data result error is little, the system automation degree high, stability is strong, yet exists system constructing complicated, shortcomings such as expensive.

Summary of the invention

To the problems referred to above, the object of the present invention is to provide a cover parameter of electric machine detection system, the technical matters that solve is real-time, quick, safe, economic testing of electric motors parameter.The present invention has realized the real-time liquid crystal display to the high-speed sampling and the parameters of each phase voltage, electric current, power, rotating speed, torque and temperature signal in the motor operation course; And carry out communication through 485 networks and PC upper computer software; Realize the functions such as real-time collection, chart demonstration, data storage, historical data analysis and printing of data on computers, thereby strengthened the human-computer interaction function of system.

For realizing above-mentioned purpose, the present invention adopts following technical scheme: a kind of parameter of electric machine detector comprises the hardware platform of being made up of central processor MCU module, measurement module, display module and communication module etc.Wherein said central processor MCU links to each other with dsp chip, torque sensor, speed probe, winding temperature rise sensor, liquid crystal display, keyboard and relevant interface circuit with electric energy metrical; Said electric energy metrical links to each other with voltage transformer (VT), current transformer with dsp chip.

Parameter detecting of the present invention is that each phase voltage, electric current, reactive power, active power, applied power, power factor (PF) and rotating speed, torque and temperature signal are detected.Wherein said electric energy metrical links to each other with voltage transformer (VT), current transformer with dsp chip and is used to detect three-phase voltage, three-phase current signal; Said torque sensor, speed probe, winding temperature rise sensor are respectively applied for and detect torque, rotating speed and temperature signal.

After the present invention constitutes governor circuit the signal of dsp chip and each sensor gained is carried out data processing as central processing unit with the C8051F340 single-chip microcomputer; Show in real time to liquid crystal display; And carry out communication through 485 networks and PC upper computer software; Realize on computers realizing man-machine interaction to uploading the further analysis and the management of data.

PC upper computer software of the present invention has been realized the functions such as real-time collection, chart demonstration, data storage, historical data analysis and printing of data based on the LabVIEW platform development.

The present invention is owing to adopt above technical scheme, and it has the following advantages:

1. automaticity of the present invention is high, reduces the manpower work, reduce cost, and simple to operate, complete function has improved work efficiency.

2. the present invention has utilized special-purpose electric energy metrical to use dsp chip, has improved the instrument arithmetic speed, has reduced error, has improved the accuracy and the system stability of data.

3. the present invention communicates through 485 networks and PC upper computer software; With data upload to computing machine; Overcome the little restriction of microprocessor reserves; The functions such as real-time collection, chart demonstration, data storage, historical data analysis and printing of data have been realized on computers, convenient analysis and research in the future.

Therefore compare with existing ordinary recognition instrument, on the function with degree easy to use on, very advantageous all.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is a use wiring diagram of the present invention.

Fig. 3 is the partial circuit schematic diagram of dsp chip in the measurement module.

Fig. 4 is the installation and connection figure of optoelectronic switch.

Fig. 5 is the installation diagram of torque sensor.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed explanation.

Parameter of electric machine detector comprises by the central processor MCU module, measurement module, the hardware platform that display module and communication module etc. are formed.Specifically as shown in Figure 1; System constitutes governor circuit with the C8051F340 single-chip microcomputer as central processing unit; Wherein said central processor MCU links to each other through spi bus with dsp chip with electric energy metrical, and links to each other with torque sensor, speed probe, winding temperature rise sensor, liquid crystal display, keyboard and relevant interface circuit, and carries out communication through 485 networks and PC upper computer software; Realize on computers realizing man-machine interaction to uploading the further analysis and the management of data; Wherein electric energy metrical links to each other with voltage transformer (VT), current transformer with dsp chip and is used to detect three-phase voltage, current signal.The parameter that the present invention can measure comprises: each phase voltage, electric current, reactive power, active power, applied power, power factor (PF) and rotating speed, torque and temperature.

The course of work:

1. initial setting up:

As shown in Figure 2: at first that the present invention is corresponding with the three-phase electricity interface end of motor, electric machine controller continuous; Then rotating speed of the present invention, torque, temperature detection port are linked to each other with motor side corresponding sensor signal wire, and PORT COM of the present invention is linked to each other with the PC host computer.

2. parameter detecting:

The detection of three phase electrical parameters: the testing circuit of three phase electrical parameters is main with electric energy metrical use dsp chip mainly in the measurement module; It is integrated 7 road second order sigma2delta ADC; Wherein 3 the tunnel are used for the three-phase voltage sampling; 3 the tunnel are used for current sample, and can measure respectively to reach mutually and close parameters such as comprising first-harmonic, harmonic wave and all-wave active power, reactive power, applied power, power factor (PF) mutually.

Specifically as shown in Figure 3: system adopts the mutual inductor mode to insert in the electric current and voltage sample circuit, and wherein PT is a voltage transformer (VT), and CT is a current transformer; Three-phase voltage (Va; Vb, Vc), three-phase current (Ia, Ib; Ic) feed mutual inductor and carry out Filtering Processing after send into dsp chip A/D converter sample; And be kept at the result in the relevant register, because dsp chip is that 0.5V, current sampling signal have best conversion accuracy when being the 0.1V left and right sides at voltage sampling signal, so be directed against different nominal operation values; Can make dsp chip get into best metering state through changing mutual inductor ratio, the parallel resistance value of mutual inductor secondary side or the voltage amplification factor of dsp chip.

After sampling is accomplished, through to going electric current, voltage signal after the DC component to carry out obtaining after a series of digital signal processing such as multiplication, addition, digital filtering the active power of each phase; Similarly, adopt displacement 90 degree to obtain reactive power afterwards voltage signal; The calculating of applied power is to calculate through PQS applied power formula ; The calculating of power factor (PF) is then calculated formula through power factor (PF) and is calculated, and its symbol is confirmed by the symbol of reactive power; Through the SPI interface data are sent into the MCU single-chip microcomputer at last and carry out further calculation process.

The detection of rotating speed: as shown in Figure 4; The present invention puts a porose code-disc on machine shaft; Height with support adjustment optoelectronic switch is in the groove of optoelectronic switch code-disc, and makes the light beam of the light emitted end output of optoelectronic switch just in time can pass the aperture of code-disc.When motor rotated, with the speed rotation, when light emitted end emitted light beams was passed the code-disc aperture, the light source receiving end received the light source output low level to porose code-disc with motor; When otherwise light source did not pass aperture, light beam was blocked, and receiving end can not receive light source output high level.The pulse signal that the one row frequency size that will produce thus changes with motor speed is passed to the internal counter of MCU single-chip microcomputer through signal wire, calculates pulsed frequency through mcu programming, thereby measures the actual tachometer value of motor.

The detection of torque: similar with the detection method of rotating speed; As shown in Figure 5; The present invention installs torque sensor on the rotation axis of motor; Utilize torque sensor to detect the voltage signal with the torque proportion relation, send into the MCU single-chip microcomputer through signal wire and carry out further data processing, thereby calculate corresponding actual motor torque value.

The detection of temperature: as shown in Figure 2; With the voltage signal that the temperature rise sensor obtains, deliver to the inner A/D converter of MCU single-chip microcomputer, be digital signal with analog signal conversion; Multiply by the scale-up factor after the dividing potential drop, measure corresponding actual temperature value through the mode of tabling look-up at last.

2. data processing:

The data of each collecting unit collection all will reach the MCU single-chip microcomputer in the parameter detecting link; After carrying out calculation process by single-chip microcomputer internal data memory and program storage; Show in real time to liquid crystal display; And carry out communication through 485 networks and PC upper computer software, realize on computers realizing man-machine interaction to uploading the further analysis and the management of data.

3. man-machine interaction:

Upper computer software of the present invention is based on the LabVIEW platform development, carries out communication through 485 networks and system, and its major function has: the Electric Machine Control parameter is provided with, and the collection of data and waveform show, the analysis of data and management.

Claims (5)

1. a parameter of electric machine detector is characterized in that: comprise the hardware platform of being made up of central processor MCU module, measurement module, display module and communication module etc.Wherein said central processor MCU links to each other with dsp chip, torque sensor, speed probe, winding temperature rise sensor, liquid crystal display, keyboard and relevant interface circuit with electric energy metrical; Said electric energy metrical links to each other with voltage transformer (VT), current transformer with dsp chip.The detectable parameter of the present invention comprises each phase voltage, electric current, reactive power, active power, applied power, power factor (PF) and rotating speed, torque and temperature.
2. parameter of electric machine detector according to claim 1 is characterized in that: constitute governor circuit with the C8051F340 single-chip microcomputer as core component in the said central processor MCU module; The MCU single-chip microcomputer links to each other through spi bus with dsp chip with electric energy metrical in the said measurement module, and links to each other with torque sensor, speed probe, winding temperature rise sensor; Utilize liquid crystal display and keyboard interface to realize man-machine interaction in the said display module; Carry out communication through 485 networks and PC upper computer software in the said communication module.
3. parameter of electric machine detector according to claim 1 is characterized in that: said electric energy metrical is with dsp chip and voltage transformer (VT), and current transformer links to each other and is used to detect three-phase voltage, three-phase current signal; Said torque sensor, speed probe, winding temperature rise sensor are respectively applied for and detect torque, rotating speed and temperature signal.
4. parameter of electric machine detector according to claim 3; It is characterized in that: electric energy metrical will be passed to the central processor MCU module with the various signals of dsp chip and sensor gained; After carrying out data processing by single-chip microcomputer, show in real time to liquid crystal display, and carry out communication through 485 networks and PC upper computer software; Realize on computers realizing man-machine interaction to uploading the further analysis and the management of data.
5. parameter of electric machine detector according to claim 4 is characterized in that: said PC upper computer software has been realized the functions such as real-time collection, chart demonstration, data storage, historical data analysis and printing of data based on the LabVIEW platform development.
CN2012100861552A 2012-03-21 2012-03-21 Motor parameter detector CN102621491A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103257289A (en) * 2013-04-03 2013-08-21 浙江工业大学 Single CPU power quality detecting and two-way power metering combination system
CN103293000A (en) * 2013-05-24 2013-09-11 东营市胜软石油技术开发有限公司 Multi-motor detection device of elevating system of self-elevating drilling platform and application method
CN103744394A (en) * 2014-01-02 2014-04-23 哈尔滨工程大学 Device and method for monitoring hydrofoil catamaran flap and tail wing servo system
CN104049557A (en) * 2014-05-12 2014-09-17 南昌大学 Connecting rod characteristic analyzing and displaying method based on LabVIEM and single-chip microcomputer
CN104122431A (en) * 2014-07-15 2014-10-29 哈尔滨工程大学 Current and voltage sensor integrated box and motor parameter real-time acquisition apparatus and method with same
CN104155605A (en) * 2014-07-24 2014-11-19 上海镭隆科技发展有限公司 Test equipment and test method for portable motor with mutarotation motion control
CN104865526A (en) * 2015-06-10 2015-08-26 南京康尼机电股份有限公司 Operating parameter detection circuit arranged in DC permanent magnetic brushless motor and method thereof
CN105978409A (en) * 2016-07-04 2016-09-28 杨勇 Multi-motor array driving structure and control method
CN106680711A (en) * 2016-09-27 2017-05-17 无锡纳旭测控科技有限公司 New-energy motor hybrid performance tester
CN108089127A (en) * 2017-12-15 2018-05-29 格力电器(武汉)有限公司 A kind of test equipment and method suitable for stepper motor
CN108988575A (en) * 2018-05-30 2018-12-11 国网新源控股有限公司回龙分公司 A kind of high reliability generating set

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103257289A (en) * 2013-04-03 2013-08-21 浙江工业大学 Single CPU power quality detecting and two-way power metering combination system
CN103293000A (en) * 2013-05-24 2013-09-11 东营市胜软石油技术开发有限公司 Multi-motor detection device of elevating system of self-elevating drilling platform and application method
CN103293000B (en) * 2013-05-24 2016-01-20 东营市胜软石油技术开发有限公司 The application process of lifting system of self-lifting well drilling platform multi-motor pick-up unit
CN103744394A (en) * 2014-01-02 2014-04-23 哈尔滨工程大学 Device and method for monitoring hydrofoil catamaran flap and tail wing servo system
CN103744394B (en) * 2014-01-02 2017-07-11 哈尔滨工程大学 A kind of monitoring device and method of hydrofoil catamaran flap empennage servo-drive system
CN104049557A (en) * 2014-05-12 2014-09-17 南昌大学 Connecting rod characteristic analyzing and displaying method based on LabVIEM and single-chip microcomputer
CN104122431A (en) * 2014-07-15 2014-10-29 哈尔滨工程大学 Current and voltage sensor integrated box and motor parameter real-time acquisition apparatus and method with same
CN104155605A (en) * 2014-07-24 2014-11-19 上海镭隆科技发展有限公司 Test equipment and test method for portable motor with mutarotation motion control
CN104865526A (en) * 2015-06-10 2015-08-26 南京康尼机电股份有限公司 Operating parameter detection circuit arranged in DC permanent magnetic brushless motor and method thereof
CN105978409A (en) * 2016-07-04 2016-09-28 杨勇 Multi-motor array driving structure and control method
CN106680711A (en) * 2016-09-27 2017-05-17 无锡纳旭测控科技有限公司 New-energy motor hybrid performance tester
CN108089127A (en) * 2017-12-15 2018-05-29 格力电器(武汉)有限公司 A kind of test equipment and method suitable for stepper motor
CN108988575A (en) * 2018-05-30 2018-12-11 国网新源控股有限公司回龙分公司 A kind of high reliability generating set

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