CN110308391A - A kind of low cost current of electric Acquisition Circuit and its acquisition method - Google Patents
A kind of low cost current of electric Acquisition Circuit and its acquisition method Download PDFInfo
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- CN110308391A CN110308391A CN201910493899.8A CN201910493899A CN110308391A CN 110308391 A CN110308391 A CN 110308391A CN 201910493899 A CN201910493899 A CN 201910493899A CN 110308391 A CN110308391 A CN 110308391A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 39
- 239000003990 capacitor Substances 0.000 claims abstract description 14
- 238000005070 sampling Methods 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 8
- 101100096719 Arabidopsis thaliana SSL2 gene Proteins 0.000 claims description 4
- 101100366560 Panax ginseng SS10 gene Proteins 0.000 claims description 4
- 101100366707 Arabidopsis thaliana SSL11 gene Proteins 0.000 claims description 3
- 101100366710 Arabidopsis thaliana SSL12 gene Proteins 0.000 claims description 3
- 101100366711 Arabidopsis thaliana SSL13 gene Proteins 0.000 claims description 3
- 101100366561 Panax ginseng SS11 gene Proteins 0.000 claims description 3
- 101100366562 Panax ginseng SS12 gene Proteins 0.000 claims description 3
- 101100366563 Panax ginseng SS13 gene Proteins 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- 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
- G01R31/343—Testing dynamo-electric machines in operation
Abstract
The invention discloses a kind of inexpensive current of electric Acquisition Circuit and its acquisition methods, are related to technical field of motors.The present invention includes resistance R1, R2, R3, R4, R5, capacitor C1, C2, diode D1, D2, single-chip microcontroller and metal-oxide-semiconductor K, and the cathode of diode D2 accesses the ADC_CUR1 interface of single-chip microcontroller by concatenated resistance R2 and R3；Resistance R5 and capacitor C1 is composed in parallel between filter circuit access diode D2 and resistance R2, and diode D1 and resistance R1 compose in parallel voltage regulator circuit and connect between resistance R2 and R3；Single-chip microcontroller CUR1_SEL interface is accessed between resistance R2 and R3 by resistance R4；The anode of diode D2 is connect by motor M1 with metal-oxide-semiconductor K.The present invention by detect with the concatenated metal-oxide-semiconductor of motor by current value motor current value is detected, to the difficulty detected by current of electric, structure of the invention is simple for reduction, it is low in cost, when keeping the accuracy to current detecting, cost is greatly reduced, improves productive profit.
Description
Technical field
The invention belongs to technical field of motors, more particularly to a kind of inexpensive current of electric Acquisition Circuit and its acquisition side
Method.
Background technique
It needs on some vehicles or some production equipments using motor.In order to understand motor when using motor
The parameters such as operation conditions, motor speed when, need to be acquired the current data of motor.Common acquisition method is to pass through
Several detection devices directly detect motor circuit, although the precision of detection is higher, cost is larger, it is difficult to promote.
Summary of the invention
The purpose of the present invention is to provide a kind of inexpensive current of electric Acquisition Circuit and its acquisition methods, solve existing
The problem that current of electric Acquisition Circuit is complicated and collection process is troublesome.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions:
The present invention be a kind of Low-cost electric machine Current Voltage Acquisition Circuit, including resistance R1, R2, R3, R4, R5, capacitor C1, C2,
Diode D1, D2, single-chip microcontroller and metal-oxide-semiconductor K；The anode of the diode D2 is connect with metal-oxide-semiconductor K；The cathode of the diode D2
It is connect with resistance R2；The resistance R5 and capacitor C1 compose in parallel filter circuit, the one end Jie diode D2 of filtered circuit
Between resistance R2, the filter circuit other end ground connection；The resistance R2 accesses the ADC_CUR1 of single-chip microcontroller by resistance R3
Interface；Between the mono- end Jie resistance R3 of capacitor C2 and the ADC_CUR1 interface of single-chip microcontroller, the capacitor C2 other end ground connection；
The selection resistance CUR1_SEL interface of the single-chip microcontroller accesses between resistance R2 and resistance R3 after connecting with resistance R4；Two pole
Pipe D1 and resistance R1 composition voltage regulator circuit parallel with one another, it is described between voltage regulator circuit one end the Jie resistance R2 and resistance R3
Another termination high level of voltage regulator circuit.
Preferably, the motor that the Acquisition Circuit to be acquired is arranged between diode D2 and metal-oxide-semiconductor K.
Preferably, the cathode of the diode D1 is connect with high level, and the anode of the diode D1 is connect with resistance R2.
A kind of acquisition method of low cost current of electric Acquisition Circuit, comprising the following steps:
SS10: the Acquisition Circuit is attached performance detection to machine winding；
SS20: the Acquisition Circuit carries out a reference value correction to the conducting resistance R0 of metal-oxide-semiconductor K；
SS30: step-down value V when detection metal-oxide-semiconductor K conducting, on metal-oxide-semiconductor K；
SS40: electric current is calculated according to the relationship of the step-down value V and conducting resistance R0 that detect.
Preferably, the step SS01 is further comprising the steps of:
SS11: the metal-oxide-semiconductor K is closed, and single-chip microcontroller selection resistance CUR1_SEL interface is set as high-impedance state, while sampling is arranged
Difference threshold x；
SS12: the Chip Microcomputer A/D C_CUR1 interface is sampled, and sampled value AD0 is obtained；
SS13: the metal-oxide-semiconductor K is disconnected, then is sampled by Chip Microcomputer A/D C_CUR1 interface, sampled value AD1 is obtained；
SS14: double sampling value AD0 and AD1 is compared, and carries out failure to machine winding according to the difference of double sampling value
Judgement illustrates that machine winding is normal, otherwise judges machine winding for failure if the difference of double sampling value is less than x.
The invention has the following advantages:
1, the present invention by detect with motor concatenated metal-oxide-semiconductor by current value motor current value is detected, reduction
To the difficulty detected by current of electric.
2, structure of the invention is simple, low in cost, when keeping the accuracy to current detecting, greatly reduces cost,
Improve productive profit.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is that a kind of some components of Low-cost electric machine Current Voltage Acquisition Circuit of the invention connect circuit diagram；
Fig. 2 is a kind of acquisition method flow chart of Low-cost electric machine Current Voltage Acquisition Circuit of the invention；
Fig. 3 is flow chart of steps included in SS10 step in Fig. 2.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one:
Refering to Figure 1, the present invention be a kind of Low-cost electric machine Current Voltage Acquisition Circuit, including resistance R1, R2, R3, R4,
R5, capacitor C1, C2, diode D1, D2, single-chip microcontroller and metal-oxide-semiconductor K；The anode of diode D2 is connect with metal-oxide-semiconductor K；Diode D2's
Cathode is connect with resistance R2；Resistance R5 and capacitor C1 composes in parallel filter circuit, one end Jie diode D2 of filtered circuit and electricity
It hinders between R2, filter circuit other end ground connection；Resistance R2 accesses the ADC_CUR1 interface of single-chip microcontroller by resistance R3；Capacitor C2 mono-
It terminates between resistance R3 and the ADC_CUR1 interface of single-chip microcontroller, capacitor C2 other end ground connection；The selection resistance CUR1_ of single-chip microcontroller
SEL interface accesses between resistance R2 and resistance R3 after connecting with resistance R4；Diode D1 and resistance R1 composition pressure stabilizing parallel with one another
Circuit, between voltage regulator circuit one end Jie resistance R2 and resistance R3, another termination high level of voltage regulator circuit.
Wherein, the motor that Acquisition Circuit to be acquired is arranged between diode D2 and metal-oxide-semiconductor K.
Wherein, the cathode of diode D1 is connect with high level, and the anode of diode D1 is connect with resistance R2.
It please refers to shown in Fig. 2, a kind of acquisition method of low cost current of electric Acquisition Circuit, comprising the following steps:
SS10: Acquisition Circuit is attached performance detection to machine winding；
SS20: Acquisition Circuit carries out a reference value correction to the conducting resistance R0 of metal-oxide-semiconductor K；
SS30: step-down value V when detection metal-oxide-semiconductor K conducting, on metal-oxide-semiconductor K；
SS40: electric current is calculated according to the relationship of the step-down value V and conducting resistance R0 that detect.
As shown in figure 3, step SS01 is further comprising the steps of:
SS11: metal-oxide-semiconductor K is closed, and single-chip microcontroller selection resistance CUR1_SEL interface is set as high-impedance state, while sampling difference is arranged
Threshold value x；
SS12: Chip Microcomputer A/D C_CUR1 interface is sampled, and sampled value AD0 is obtained；
SS13: metal-oxide-semiconductor K is disconnected, then is sampled by Chip Microcomputer A/D C_CUR1 interface, and sampled value AD1 is obtained；
SS14: double sampling value AD0 and AD1 is compared, and carries out failure to machine winding according to the difference of double sampling value
Judgement illustrates that machine winding is normal, otherwise judges machine winding for failure if the difference of double sampling value is less than x.
Embodiment two:
Refering to Figure 1, the present invention is a kind of inexpensive current of electric Acquisition Circuit and its acquisition method, working principle
Are as follows: when metal-oxide-semiconductor K conducting, can pass through because the resistance of metal-oxide-semiconductor K itself generates decompression V when electric current is from metal-oxide-semiconductor K flow direction motor
Relationship between measurement to the voltage on metal-oxide-semiconductor K and the resistance value of metal-oxide-semiconductor K itself calculates the size of electric current i, due to motor
It connects with metal-oxide-semiconductor, so calculated current value is the current value that motor passes through at this time.
When measuring the decompression V on metal-oxide-semiconductor K, while a reference value to the resistance R0 of metal-oxide-semiconductor K being needed to calibrate, due to
Resistance sizes vary with temperature, and when the temperature change of the metal-oxide-semiconductor K used is lower, can ignore influence of the temperature to resistance R0,
When the temperature change of the metal-oxide-semiconductor K used is larger, by the service manual of metal-oxide-semiconductor by temperature measurement to the benchmark of resistance R0
Value is calibrated.
Embodiment three:
Refering to Figure 1, the present invention is a kind of inexpensive current of electric Acquisition Circuit and its acquisition method, part electronics member
Device parameters are as follows:
| Device name or symbol | Parameter | Device name or symbol | Parameter |
| R1 | 33KΩ | R5 | 4.7KΩ |
| R2 | 14KΩ | C1 | 1nF |
| R3 | 47KΩ | C2 | 10nF |
| R4 | 1.5KΩ |
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means to combine
The embodiment or example particular features, structures, materials, or characteristics described be contained at least one embodiment of the present invention or
In example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.And
And particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples with suitable
Mode combine.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (5)
1. a kind of Low-cost electric machine Current Voltage Acquisition Circuit, it is characterised in that: including resistance R1, R2, R3, R4, R5, capacitor
C1, C2, diode D1, D2, single-chip microcontroller and metal-oxide-semiconductor K；The anode of the diode D2 is connect with metal-oxide-semiconductor K；The diode D2
Cathode connect with resistance R2；The resistance R5 and capacitor C1 compose in parallel filter circuit, the one end Jie bis- of filtered circuit
Between pole pipe D2 and resistance R2, the filter circuit other end ground connection；The resistance R2 accesses single-chip microcontroller by resistance R3
ADC_CUR1 interface；Between the mono- end Jie resistance R3 of capacitor C2 and the ADC_CUR1 interface of single-chip microcontroller, the capacitor C2 is another
One end ground connection；The selection resistance CUR1_SEL interface of the single-chip microcontroller connect with resistance R4 after access resistance R2 and resistance R3 it
Between；The diode D1 and resistance R1 composition voltage regulator circuit parallel with one another, the one end Jie resistance R2 of voltage regulator circuit and resistance
Between R3, another termination high level of voltage regulator circuit.
2. a kind of Low-cost electric machine Current Voltage Acquisition Circuit according to claim 1, which is characterized in that the acquisition electricity
The motor that road to be acquired is arranged between diode D2 and metal-oxide-semiconductor K.
3. a kind of Low-cost electric machine Current Voltage Acquisition Circuit according to claim 1, which is characterized in that the diode
The cathode of D1 is connect with high level, and the anode of the diode D1 is connect with resistance R2.
4. a kind of acquisition method of inexpensive current of electric Acquisition Circuit as described in claim 1-3, which is characterized in that including
Following steps:
SS10: the Acquisition Circuit is attached performance detection to machine winding；
SS20: the Acquisition Circuit carries out a reference value correction to the conducting resistance R0 of metal-oxide-semiconductor K；
SS30: step-down value V when detection metal-oxide-semiconductor K conducting, on metal-oxide-semiconductor K；
SS40: electric current is calculated according to the relationship of the step-down value V and conducting resistance R0 that detect.
5. a kind of acquisition method of inexpensive current of electric Acquisition Circuit according to claim 4, which is characterized in that described
Step SS01 is further comprising the steps of:
SS11: the metal-oxide-semiconductor K is closed, and single-chip microcontroller selection resistance CUR1_SEL interface is set as high-impedance state, while sampling is arranged
Difference threshold x；
SS12: the Chip Microcomputer A/D C_CUR1 interface is sampled, and sampled value AD0 is obtained；
SS13: the metal-oxide-semiconductor K is disconnected, then is sampled by Chip Microcomputer A/D C_CUR1 interface, sampled value AD1 is obtained；
SS14: double sampling value AD0 and AD1 is compared, and carries out failure to machine winding according to the difference of double sampling value
Judgement illustrates that machine winding is normal, otherwise judges machine winding for failure if the difference of double sampling value is less than x.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910493899.8A CN110308391A (en) | 2019-06-07 | 2019-06-07 | A kind of low cost current of electric Acquisition Circuit and its acquisition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910493899.8A CN110308391A (en) | 2019-06-07 | 2019-06-07 | A kind of low cost current of electric Acquisition Circuit and its acquisition method |
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| CN110308391A true CN110308391A (en) | 2019-10-08 |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02193592A (en) * | 1989-01-20 | 1990-07-31 | Pfu Ltd | Overcurrent detection system for motor |
| JPH11211758A (en) * | 1998-01-28 | 1999-08-06 | Ntt Data Corp | Load current detector and transformer |
| JP2001119987A (en) * | 1999-10-18 | 2001-04-27 | Meidensha Corp | Apparatus for diagnosing failure of motor drive circuit |
| CN201266833Y (en) * | 2008-06-03 | 2009-07-01 | 东华大学 | On-line pre-detection circuit and device for protection of shorted to earth of frequency changer output end |
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| CN103050932A (en) * | 2012-12-11 | 2013-04-17 | 深圳市高斯宝电气技术有限公司 | Electronic switch circuit for power over Ethernet |
| CN204068793U (en) * | 2014-08-27 | 2014-12-31 | 西京学院 | A kind of used in oil well logging pushing device digitlization current control circuit |
| CN105634348A (en) * | 2014-10-29 | 2016-06-01 | 金海新源电气江苏有限公司 | Brushless DC motor MOS tube driving circuit |
| CN206332435U (en) * | 2016-12-28 | 2017-07-14 | 深圳拓邦股份有限公司 | A kind of high current protection circuit |
| CN207036935U (en) * | 2017-07-17 | 2018-02-23 | 无锡机电高等职业技术学校 | A kind of brshless DC motor list resistor current sampling apparatus |
| WO2018218972A1 (en) * | 2017-06-01 | 2018-12-06 | 深圳源创智能照明有限公司 | Solar power supply system and charging and discharging detection and regulating circuit thereof |
| CN208508828U (en) * | 2018-08-13 | 2019-02-15 | 上海联芊电子科技有限公司 | Sample circuit and electric machine control system |
| CN210639251U (en) * | 2019-06-07 | 2020-05-29 | 浙江联宜电机有限公司 | Low-cost motor current acquisition circuit |
-
2019
- 2019-06-07 CN CN201910493899.8A patent/CN110308391A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02193592A (en) * | 1989-01-20 | 1990-07-31 | Pfu Ltd | Overcurrent detection system for motor |
| JPH11211758A (en) * | 1998-01-28 | 1999-08-06 | Ntt Data Corp | Load current detector and transformer |
| JP2001119987A (en) * | 1999-10-18 | 2001-04-27 | Meidensha Corp | Apparatus for diagnosing failure of motor drive circuit |
| CN201266833Y (en) * | 2008-06-03 | 2009-07-01 | 东华大学 | On-line pre-detection circuit and device for protection of shorted to earth of frequency changer output end |
| CN102969704A (en) * | 2012-11-06 | 2013-03-13 | 天津市松正电动汽车技术股份有限公司 | Pre-charging circuit |
| CN103050932A (en) * | 2012-12-11 | 2013-04-17 | 深圳市高斯宝电气技术有限公司 | Electronic switch circuit for power over Ethernet |
| CN204068793U (en) * | 2014-08-27 | 2014-12-31 | 西京学院 | A kind of used in oil well logging pushing device digitlization current control circuit |
| CN105634348A (en) * | 2014-10-29 | 2016-06-01 | 金海新源电气江苏有限公司 | Brushless DC motor MOS tube driving circuit |
| CN206332435U (en) * | 2016-12-28 | 2017-07-14 | 深圳拓邦股份有限公司 | A kind of high current protection circuit |
| WO2018218972A1 (en) * | 2017-06-01 | 2018-12-06 | 深圳源创智能照明有限公司 | Solar power supply system and charging and discharging detection and regulating circuit thereof |
| CN207036935U (en) * | 2017-07-17 | 2018-02-23 | 无锡机电高等职业技术学校 | A kind of brshless DC motor list resistor current sampling apparatus |
| CN208508828U (en) * | 2018-08-13 | 2019-02-15 | 上海联芊电子科技有限公司 | Sample circuit and electric machine control system |
| CN210639251U (en) * | 2019-06-07 | 2020-05-29 | 浙江联宜电机有限公司 | Low-cost motor current acquisition circuit |
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