CN103219938B - A kind of current detection circuit - Google Patents
A kind of current detection circuit Download PDFInfo
- Publication number
- CN103219938B CN103219938B CN201310035107.5A CN201310035107A CN103219938B CN 103219938 B CN103219938 B CN 103219938B CN 201310035107 A CN201310035107 A CN 201310035107A CN 103219938 B CN103219938 B CN 103219938B
- Authority
- CN
- China
- Prior art keywords
- resistance
- electric capacity
- comparator
- input
- detection circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 238000007599 discharging Methods 0.000 claims description 8
- 238000004378 air conditioning Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The embodiment of the invention discloses a kind of current detection circuit, be applied to without in the external drive circuit of Hall DC fan, can by waveform analysis to input current, that is PWM Algorithm determines the current residing position of rotor, thus make motor by the stable running of predetermined speed.
Description
Technical field
The embodiment of the present invention relates to electronic circuit field, is specifically related to a kind of being applied to without the current detection circuit in the external drive circuit of Hall DC fan.
Background technology
Air-conditioning, also referred to as air regulator, is a kind of adjustment for parameters such as the temperature to air in region, humidity, cleanliness factor and air velocitys, to meet the unit of human comfort or technical process requirement.
Along with the development of China's air-conditioning industry, China has become the first in the world air-conditioning producing country, and the use of air conditioner is also more and more universal.The blower fan that current air-conditioning uses mainly can be divided into alternating current machine and be built-in with feedback two kinds, direct current machine.
Wherein because there is the shortcomings such as efficiency is low, noise is large in alternating current machine, reduces the use on air-conditioning gradually; Along with the development of modern technologies, the popularization of brshless DC motor, solve the defect of alternating current machine, now commercially mostly adopt and be built-in with feedback direct current machine, but this motor because cost is high, motor internal limited space, non-easy heat radiation and built-in drive circuit plate in use fragile, cause in enormous quantities popularization to there is failure rate and the higher difficult problem of cost.
Utilize without Hall DC fan drive plate, motor-drive circuit is combined with ac control circuit, adopt DC frequency-changing 180 degree of vector control technologies, save built-in Hall feedback circuit, the difficult problem that built-in drive circuit is fragile and cost is high can be solved.
Summary of the invention
Embodiments provide a kind of current detection circuit, be applied to without in the external drive circuit of Hall DC fan, can by waveform analysis to input current, that is PWM Algorithm determines the current residing position of rotor, thus make motor by the stable running of predetermined speed.
Current detection circuit in the embodiment of the present invention, comprising:
Two pins of input: the first input pin (a) and the second input pin (b), eight resistance: the first resistance (R1), second resistance (R2), 3rd resistance (R3), 4th resistance (R4), 5th resistance (R5), 6th resistance (R6), 7th resistance (R7) and the 8th resistance (R8), two comparators: the first comparator (B1) and the second comparator (B2), four electric capacity: the first electric capacity (C1), second electric capacity (C2), 3rd electric capacity (C3) and the 4th electric capacity (C4), output two pins: the first output pin (c) and the second output pin (d),
First input pin (a) and the second input pin (b) connect any two-phase of three phase mains as the pin of current detection circuit input, and the first input pin (a) is connected with the first resistance (R1), the second input pin (b) is connected with the second resistance (R2);
One end and the first comparator (B1) electrode input end of the first resistance (R1), the 3rd resistance (R3), the first electric capacity (C1) connect together, and the DC power supply of the 3rd resistance (R3) another termination predeterminated voltage, the other end ground connection of the first electric capacity (C1);
One end and the second comparator (B2) electrode input end of the second resistance (R2), the 4th resistance (R4), the second electric capacity (C2) connect together, and the DC power supply of the 4th resistance (R4) another termination predeterminated voltage, the other end ground connection of the second electric capacity (C2);
5th resistance (R5), one end of the 6th resistance (R6) and the negative input of the first comparator (B1) connect together, and other one end ground connection of the 5th resistance (R5), the output of other termination first comparator (B1) of the 6th resistance (R6);
7th resistance (R7), one end of the 8th resistance (R8) and the negative input of the second comparator (B2) connect together, and other one end ground connection of the 7th resistance (R7), the output of other termination second comparator (B2) of the 8th resistance (R8);
The DC power supply of one termination predeterminated voltage of the 3rd electric capacity (C3) and the 4th electric capacity (C4), one end ground connection in addition.
Alternatively, described first comparator (B1) and the second comparator (B2) are integrated in above one piece of integrated transporting discharging chip (IC), and the supply pin of described integrated transporting discharging chip (IC) connects the DC power supply of predeterminated voltage.
Alternatively, the predetermined voltage range of described DC power supply is 4 to 6V.
Alternatively, described current detection circuit is applied to without in the external drive circuit of Hall DC fan.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages: the current detection circuit of above scheme is applied to without in the external drive circuit of Hall DC fan, owing to passing through the waveform analysis to input current, that is PWM Algorithm determines the current residing position of rotor, after determining the position that rotor is current, just can determine next step driving of rotor, motor thus can be made by predetermined speed runs steadily.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is embodiment of the present invention current detection circuit structural representation.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, in the embodiment of the present invention, current detection circuit comprises:
Two pins of input: the first input pin a and the second input pin b, eight resistance: the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8, two comparators: the first comparator B1 and the second comparator B2, four electric capacity: the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4, output two pins: the first output pin c and the second output pin d;
First input pin a and the second input pin b is as any two-phase of the pin connection three phase mains of current detection circuit input, and the first input pin a is connected with the first resistance R1, and the second input pin b is connected with the second resistance R2;
One end and the first comparator B1 electrode input end of the first resistance R1, the 3rd resistance R3, the first electric capacity C1 connect together, and the DC power supply of the 3rd another termination predeterminated voltage of resistance R3, the other end ground connection of the first electric capacity C1;
One end and the second comparator B2 electrode input end of the second resistance R2, the 4th resistance R4, the second electric capacity C2 connect together, and the DC power supply of the 4th another termination predeterminated voltage of resistance R4, the other end ground connection of the second electric capacity C2;
One end of 5th resistance R5, the 6th resistance R6 and the negative input of the first comparator B1 connect together, and other one end ground connection of the 5th resistance R5, the output of an other termination first comparator B1 of the 6th resistance R6;
One end of 7th resistance R7, the 8th resistance R8 and the negative input of the second comparator B2 connect together, and other one end ground connection of the 7th resistance R7, the output of an other termination second comparator B2 of the 8th resistance R8;
The DC power supply of the one termination predeterminated voltage of the 3rd electric capacity C3 and the 4th electric capacity C4, one end ground connection in addition.
The current detection circuit of above scheme is applied to without in the external drive circuit of Hall DC fan, owing to passing through the waveform analysis to input current, that is PWM Algorithm determines the current residing position of rotor, after determining the position that rotor is current, next step that just can determine rotor drives, and motor thus can be made by the stable running of predetermined speed.
Alternatively, described first comparator B1 and the second comparator B2 is integrated in above one piece of integrated transporting discharging chip IC, and the supply pin of described integrated transporting discharging chip IC connects the DC power supply of predeterminated voltage.
Alternatively, the predetermined voltage range of described DC power supply is 4 to 6V.
It should be noted that the preferred value of the predeterminated voltage of the DC power supply in the embodiment of the present invention is 5V.
Alternatively, described current detection circuit is applied to without in the external drive circuit of Hall DC fan.
The current detection circuit of above scheme is applied to without in the external drive circuit of Hall DC fan, owing to passing through the waveform analysis to input current, that is PWM Algorithm determines the current residing position of rotor, after determining the position that rotor is current, just can determine next step driving of rotor, thus motor can be made by the stable running of predetermined speed, 3rd electric capacity C3 and the 4th electric capacity C4 as the storage capacitor of integrated transporting discharging chip IC, can provide stable power supply to integrated transporting discharging chip IC simultaneously.
These are only the present invention's preferably embodiment; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the embodiment of the present invention discloses, the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (4)
1. a current detection circuit, is characterized in that, comprising:
Two pins of input: the first input pin (a) and the second input pin (b), eight resistance: the first resistance (R1), second resistance (R2), 3rd resistance (R3), 4th resistance (R4), 5th resistance (R5), 6th resistance (R6), 7th resistance (R7) and the 8th resistance (R8), two comparators: the first comparator (B1) and the second comparator (B2), four electric capacity: the first electric capacity (C1), second electric capacity (C2), 3rd electric capacity (C3) and the 4th electric capacity (C4), output two pins: the first output pin (c) and the second output pin (d),
First input pin (a) and the second input pin (b) connect any two-phase of three phase mains as the pin of current detection circuit input, and the first input pin (a) is connected with the first resistance (R1), the second input pin (b) is connected with the second resistance (R2);
One end and the first comparator (B1) electrode input end of the first resistance (R1), the 3rd resistance (R3), the first electric capacity (C1) connect together, and the DC power supply of the 3rd resistance (R3) another termination predeterminated voltage, the other end ground connection of the first electric capacity (C1);
One end and the second comparator (B2) electrode input end of the second resistance (R2), the 4th resistance (R4), the second electric capacity (C2) connect together, and the DC power supply of the 4th resistance (R4) another termination predeterminated voltage, the other end ground connection of the second electric capacity (C2);
5th resistance (R5), one end of the 6th resistance (R6) and the negative input of the first comparator (B1) connect together, and other one end ground connection of the 5th resistance (R5), the output of other termination first comparator (B1) of the 6th resistance (R6);
7th resistance (R7), one end of the 8th resistance (R8) and the negative input of the second comparator (B2) connect together, and other one end ground connection of the 7th resistance (R7), the output of other termination second comparator (B2) of the 8th resistance (R8);
The DC power supply of one termination predeterminated voltage of the 3rd electric capacity (C3) and the 4th electric capacity (C4), one end ground connection in addition.
2. current detection circuit according to claim 1, it is characterized in that, described first comparator (B1) and the second comparator (B2) are integrated in above one piece of integrated transporting discharging chip (IC), and the supply pin of described integrated transporting discharging chip (IC) connects the DC power supply of predeterminated voltage.
3. current detection circuit according to claim 1 and 2, is characterized in that, the predetermined voltage range of described DC power supply is 4 to 6V.
4. current detection circuit according to claim 3, is characterized in that, described current detection circuit is applied to without in the external drive circuit of Hall DC fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310035107.5A CN103219938B (en) | 2013-01-29 | 2013-01-29 | A kind of current detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310035107.5A CN103219938B (en) | 2013-01-29 | 2013-01-29 | A kind of current detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103219938A CN103219938A (en) | 2013-07-24 |
| CN103219938B true CN103219938B (en) | 2015-11-11 |
Family
ID=48817494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310035107.5A Active CN103219938B (en) | 2013-01-29 | 2013-01-29 | A kind of current detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103219938B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570804A (en) * | 2013-10-12 | 2015-04-29 | 樱花卫厨（中国）股份有限公司 | Applying circuit for detecting current of fan in real time |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324142A (en) * | 2000-05-12 | 2001-11-28 | 埃布姆工厂股份有限两合公司 | Electronic switching system for brushless dc electric motor |
| CN101166008A (en) * | 2006-10-18 | 2008-04-23 | 松下电器产业株式会社 | Motor drive device and motor drive device for washing and drying machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3804427B2 (en) * | 2000-09-28 | 2006-08-02 | 松下電器産業株式会社 | Rotor position detector |
| JP4684763B2 (en) * | 2005-06-29 | 2011-05-18 | ルネサスエレクトロニクス株式会社 | Stationary position detection circuit |
| JP4367555B2 (en) * | 2007-06-20 | 2009-11-18 | 株式会社デンソー | Energization timing determination circuit and motor energization timing determination method |
| JP2009011134A (en) * | 2007-06-29 | 2009-01-15 | Toshiba Corp | Motor control apparatus, motor control system, motor control method, semiconductor device, and electronic equipment |
-
2013
- 2013-01-29 CN CN201310035107.5A patent/CN103219938B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324142A (en) * | 2000-05-12 | 2001-11-28 | 埃布姆工厂股份有限两合公司 | Electronic switching system for brushless dc electric motor |
| CN101166008A (en) * | 2006-10-18 | 2008-04-23 | 松下电器产业株式会社 | Motor drive device and motor drive device for washing and drying machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103219938A (en) | 2013-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1925307A (en) | Motor speed control integrated circuit | |
| CN207150412U (en) | Power package module, control circuit and air conditioner | |
| CN203086393U (en) | Parallel driving circuit of double brushless direct current motors | |
| CN202634345U (en) | ECM motor controller capable of adapting to different frequencies and different supply voltages | |
| CN204481723U (en) | A kind of brushless direct current motor controller based on STM32 single-chip microcomputer | |
| CN104283437A (en) | Converter | |
| CN104113261A (en) | Air-conditioner compressor control circuit and variable frequency air-conditioner | |
| WO2016101467A1 (en) | Isolation speed regulation interface circuit and electrical equipment system using same | |
| CN103219938B (en) | A kind of current detection circuit | |
| CN102748835B (en) | System for controlling split units of household central air conditioner | |
| CN108458457B (en) | Variable frequency air conditioner circuit board and variable frequency air conditioner | |
| CN103414225A (en) | Electric vehicle charger with temperature-control fan | |
| CN106526484A (en) | Energy-saving aging system of direct current motor driver and aging method thereof | |
| CN104467386A (en) | High-stability low-pass filter inverter system | |
| CN108667311A (en) | The frequency-variable controller and air conditioner of three phase mains | |
| CN104362909A (en) | Brushless direct-current motor controller | |
| CN204810186U (en) | Sinusoidal wave brushless DC motor driver | |
| CN103166183B (en) | Protection circuit | |
| CN209233733U (en) | The frequency-variable controller and air conditioner of three phase mains | |
| CN204025831U (en) | A kind of wireless valve controller based on M-Bus bus | |
| CN206517305U (en) | A kind of power conversion circuit | |
| CN206272529U (en) | Direct current generator commutating circuit | |
| CN205754012U (en) | A kind of inverter | |
| CN205559344U (en) | Fan motor drive circuit | |
| CN205670517U (en) | Control loop, A.C. contactor and the power equipment of a kind of ac contactor coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20240326 Granted publication date: 20151111 |