CN110031758A - A kind of method for detecting open phase and system of three-phase brushless dc motor - Google Patents
A kind of method for detecting open phase and system of three-phase brushless dc motor Download PDFInfo
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- CN110031758A CN110031758A CN201910264648.2A CN201910264648A CN110031758A CN 110031758 A CN110031758 A CN 110031758A CN 201910264648 A CN201910264648 A CN 201910264648A CN 110031758 A CN110031758 A CN 110031758A
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- motor
- signal
- phase
- photoelectrical coupler
- digital frequency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- General Physics & Mathematics (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The present invention relates to motor phase failure detection field more particularly to the method for detecting open phase and system of a kind of three-phase brushless dc motor, including obtaining the FG signal of motor as signal to be detected；Signal to be detected is inputted in rc low pass filter and filter out frequency glitches processing, switchs to d. c. voltage signal output；The d. c. voltage signal exports after photoelectrical coupler into digital frequency meter, and digital frequency meter shows the frequency of signal to be detected；By the signal frequency that digital frequency meter is shown judge motor whether phase shortage；It is shown the invention has the advantages that carrying out detection by the frequency to motor FG signal, technical staff can be allowed intuitive and exact judgement current motor whether there is the bad problem of phase shortage, detection process is enormously simplified, reduce testing cost.
Description
Technical field
The present invention relates to motor phase failure detection field more particularly to a kind of method for detecting open phase of three-phase brushless dc motor
And system.
Background technique
Electromagnetism of the three-phase brushless dc motor in single-phase or two-phase phase shortage, since the voltage of input is lower, in motor
Torque can not overcome the cogging torque of motor itself, cause motor that can not operate or rotate inability, cause one to motor itself
Therefore fixed damage either in the starting of motor or operational process, requires the carry out pile defection to motor.But
Existing brshless DC motor detection process is excessively cumbersome, and detection circuit structure is excessively complicated, so that testing cost rises, is not inconsistent
Close practical application.
Summary of the invention
One of the objects of the present invention is to provide a kind of method for detecting open phase of three-phase brushless dc motor, for simplifying inspection
Survey process.
To achieve the goals above, technical scheme is as follows:
A kind of method for detecting open phase of three-phase brushless dc motor, comprising the following steps:
(1) the FG signal of motor is obtained as signal to be detected；
(2) signal to be detected is inputted in rc low pass filter and filter out frequency glitches processing, switch to d. c. voltage signal
Output；
(3) d. c. voltage signal exports after photoelectrical coupler into digital frequency meter, and digital frequency meter shows to be checked
Survey the frequency of signal；
(4) by the signal frequency that digital frequency meter is shown judge motor whether phase shortage.
Further, it needs to handle by clamper before the d. c. voltage signal input optocoupler.
The second object of the present invention is to provide a kind of pile defection system of three-phase brushless dc motor, including capacitance-resistance is low
Bandpass filter, filter capacitor group, photoelectrical coupler and digital frequency meter, the input terminal of rc low pass filter is for receiving motor
The FG signal of sending, the input terminal of filter capacitor group are electrically connected with the driving voltage of motor；The rc low pass filter it is defeated
Outlet, filter capacitor group output end connect with the input terminal of photoelectrical coupler, the output end of photoelectrical coupler and number frequency
The input terminal of rate meter connects.
Further, clamp diode is electrically connected between the low cylinder filter of the capacitance-resistance and photoelectrical coupler.
Further, zener diode is electrically connected between the filter capacitor group and photoelectrical coupler.
Further, pull-up resistor one is electrically connected between the zener diode and photoelectrical coupler.
Further, pull-up resistor two is electrically connected between the photoelectrical coupler and digital frequency meter.
It is shown the present invention has the advantages that carrying out detection by the frequency to motor FG signal, technical staff can be allowed straight
See and exact judgement current motor be with the presence or absence of the bad problem of phase shortage, enormously simplify detection process, reduce detection at
This.
Detailed description of the invention
Fig. 1 is detection system schematic diagram of the present invention；
Fig. 2 is the FG signal frequency figure shown in digital frequency meter；
Label declaration
Rc low pass filter 1, filter capacitor group 2, photoelectrical coupler 3, pull-up resistor 1, pull-up resistor 25, two pole of clamper
Pipe 6, zener diode 7.
Specific embodiment
Present invention is further described in detail with reference to embodiments.
The present embodiment proposes a kind of method for detecting open phase of three-phase brushless dc motor, comprising the following steps:
Step 1: the FG signal of motor is obtained as signal to be detected；
Step 2: signal to be detected is inputted in rc low pass filter 1 and filter out frequency glitches processing, switchs to DC voltage
Signal output,；
Step 3: output is into digital frequency meter after photoelectrical coupler 3 after clamper processing for the d. c. voltage signal, number
Word frequency meter shows the frequency of signal to be detected, and signal frequency figure is with reference to figure two；
Step 4: by the signal frequency that digital frequency meter is shown judge motor whether phase shortage.
To support above-mentioned steps, the present embodiment also proposed a kind of pile defection system of three-phase brushless dc motor, join
Examine figure one, including rc low pass filter 1, filter capacitor group 2, photoelectrical coupler 3 and digital frequency meter, rc low pass filter
1 input terminal is used to receive the FG signal of motor sending, and the input terminal of filter capacitor group 2 is electrically connected with the driving voltage of motor；
The output end of the rc low pass filter 1, the output end of filter capacitor group 2 are connect with the input terminal of photoelectrical coupler 3, light
The output end of electric coupler 3 and the input terminal of digital frequency meter connect.
It is electrically connected with clamp diode 6 between the low cylinder filter of capacitance-resistance and photoelectrical coupler 3, for protecting circuit.
Zener diode 7 is electrically connected between filter capacitor group 2 and photoelectrical coupler 3, for protecting circuit.
Pull-up resistor 1, photoelectrical coupler 3 and numerical frequency are electrically connected between zener diode 7 and photoelectrical coupler 3
Pull-up resistor 25 is electrically connected between meter, for increasing the stability of circuit.
The working principle of the present embodiment is as described below, and motor is started to work, and the power device in motor generates FG signal simultaneously
It is sent to rc low pass filter 1, rc low pass filter 1 will form steady dc voltage after the target signal filter frequency glitches
Signal, d. c. voltage signal enter in photoelectrical coupler 3 after clamp diode 6, the type of clamp diode 6 in the present embodiment
Number for IN4148 and positive and negative electrode voltage is 5V, the model PC817C of photoelectrical coupler 3；At the same time, the VCC electricity of motor
The voltage in source (i.e. driving power) enters photoelectricity coupling after passing sequentially through filter capacitor group 2, zener diode 7 and pull-up resistor 1
In clutch 3, the filter capacitor group 2 in the present embodiment includes the filter capacitor of three electrical connections；Photoelectrical coupler 3 is by the voltage of 5V
Signal exports after pull-up resistor 25 to digital frequency meter, and digital frequency meter detects the frequency of this signal, and in display screen
Middle display, technical staff by display signal frequency determine motor whether phase shortage.
Claims (7)
1. a kind of method for detecting open phase of three-phase brushless dc motor, it is characterised in that: the following steps are included:
(1) the FG signal of motor is obtained as signal to be detected；
(2) signal to be detected is inputted in rc low pass filter and filter out frequency glitches processing, switch to d. c. voltage signal
Output；
(3) d. c. voltage signal exports after photoelectrical coupler into digital frequency meter, and digital frequency meter shows to be checked
Survey the frequency of signal；
(4) by the signal frequency that digital frequency meter is shown judge motor whether phase shortage.
2. a kind of method for detecting open phase of three-phase brushless dc motor as described in claim 1, it is characterised in that: the direct current
It needs to handle by clamper before voltage signal input optocoupler.
3. a kind of pile defection system of three-phase brushless dc motor, it is characterised in that: including rc low pass filter, filtered electrical
Appearance group, photoelectrical coupler and digital frequency meter, the input terminal of rc low pass filter are used to receive the FG signal of motor sending, filter
The input terminal of wave capacitance group is electrically connected with the driving voltage of motor；The output end of the rc low pass filter, filter capacitor group
Output end connect with the input terminal of photoelectrical coupler, the input terminal of the output end of photoelectrical coupler and digital frequency meter connects
It connects.
4. a kind of pile defection system of three-phase brushless dc motor as claimed in claim 3, it is characterised in that: the capacitance-resistance
Clamp diode is electrically connected between low cylinder filter and photoelectrical coupler.
5. a kind of pile defection system of three-phase brushless dc motor as claimed in claim 3, it is characterised in that: the filtering
Zener diode is electrically connected between capacitance group and photoelectrical coupler.
6. a kind of pile defection system of three-phase brushless dc motor as claimed in claim 5, it is characterised in that: the pressure stabilizing
Pull-up resistor one is electrically connected between diode and photoelectrical coupler.
7. a kind of pile defection system of three-phase brushless dc motor as claimed in claim 3, it is characterised in that: the photoelectricity
Pull-up resistor two is electrically connected between coupler and digital frequency meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910264648.2A CN110031758A (en) | 2019-04-03 | 2019-04-03 | A kind of method for detecting open phase and system of three-phase brushless dc motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910264648.2A CN110031758A (en) | 2019-04-03 | 2019-04-03 | A kind of method for detecting open phase and system of three-phase brushless dc motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110031758A true CN110031758A (en) | 2019-07-19 |
Family
ID=67237329
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910264648.2A Pending CN110031758A (en) | 2019-04-03 | 2019-04-03 | A kind of method for detecting open phase and system of three-phase brushless dc motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112654876A (en) * | 2019-07-26 | 2021-04-13 | 东芝三菱电机产业系统株式会社 | Power conversion device and phase loss detection device |
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| US20060049786A1 (en) * | 2004-03-09 | 2006-03-09 | Foxconn Technology Co.,Ltd | Circuit for fan motor |
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| CN101413975A (en) * | 2007-10-16 | 2009-04-22 | 深圳市汇川技术股份有限公司 | Three-phase power input phase lack detection circuit |
| CN102426302A (en) * | 2011-09-15 | 2012-04-25 | 广州三晶电气有限公司 | Three-phase power input open-phase detection circuit |
| CN103954902A (en) * | 2014-04-30 | 2014-07-30 | 广东威灵电机制造有限公司 | Fault detection method and fault detection device for direct-current motor drive and control circuit |
| CN203965581U (en) * | 2014-04-30 | 2014-11-26 | 广东威灵电机制造有限公司 | The failure detector of direct current generator Drive and Control Circuit |
| CN105548884A (en) * | 2016-01-21 | 2016-05-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor testing method |
| CN106787989A (en) * | 2016-12-23 | 2017-05-31 | 深圳拓邦股份有限公司 | A kind of pile defection device and method of Brush-Less DC motor control circuit |
| CN207832988U (en) * | 2017-12-29 | 2018-09-07 | 福建安麟智能科技股份有限公司 | A kind of Three phase power phase shortage reverse phase detection circuit |
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2019
- 2019-04-03 CN CN201910264648.2A patent/CN110031758A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1433950A (en) * | 2002-01-24 | 2003-08-06 | 北京航天万源稀土电机应用技术有限公司 | Rareearth permanent-magnet self-synchronous gearless elevator driving control system |
| US20060049786A1 (en) * | 2004-03-09 | 2006-03-09 | Foxconn Technology Co.,Ltd | Circuit for fan motor |
| CN101413975A (en) * | 2007-10-16 | 2009-04-22 | 深圳市汇川技术股份有限公司 | Three-phase power input phase lack detection circuit |
| CN201185342Y (en) * | 2008-04-19 | 2009-01-21 | 中国铝业股份有限公司 | Phase-lacking detection protector for hoisting electric machine of groove-controlled machine |
| CN102426302A (en) * | 2011-09-15 | 2012-04-25 | 广州三晶电气有限公司 | Three-phase power input open-phase detection circuit |
| CN103954902A (en) * | 2014-04-30 | 2014-07-30 | 广东威灵电机制造有限公司 | Fault detection method and fault detection device for direct-current motor drive and control circuit |
| CN203965581U (en) * | 2014-04-30 | 2014-11-26 | 广东威灵电机制造有限公司 | The failure detector of direct current generator Drive and Control Circuit |
| CN105548884A (en) * | 2016-01-21 | 2016-05-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor testing method |
| CN106787989A (en) * | 2016-12-23 | 2017-05-31 | 深圳拓邦股份有限公司 | A kind of pile defection device and method of Brush-Less DC motor control circuit |
| CN207832988U (en) * | 2017-12-29 | 2018-09-07 | 福建安麟智能科技股份有限公司 | A kind of Three phase power phase shortage reverse phase detection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112654876A (en) * | 2019-07-26 | 2021-04-13 | 东芝三菱电机产业系统株式会社 | Power conversion device and phase loss detection device |
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Application publication date: 20190719 |