CN103412598B - A kind of brshless DC motor hall sensor signal current conveying circuit - Google Patents
A kind of brshless DC motor hall sensor signal current conveying circuit Download PDFInfo
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- CN103412598B CN103412598B CN201310311623.6A CN201310311623A CN103412598B CN 103412598 B CN103412598 B CN 103412598B CN 201310311623 A CN201310311623 A CN 201310311623A CN 103412598 B CN103412598 B CN 103412598B
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Abstract
The invention discloses a kind of brshless DC motor hall sensor signal current conveying circuit, comprise two power modules, hall signal prime processing module, voltage and current signal modular converter, signal isolation and amplifier module, hall signal is processed by prime processing module, the output being input as hall signal prime processing module of voltage and current signal modular converter, the output being input as voltage and current signal modular converter of signal isolation and amplifier module, isolation signals output signal is output voltage signal, directly can carry out signal transacting by Access Control chip input interface, hall sensor signal transmission circuit is when carrying out hall signal long range propagation, hall signal can not be disturbed, ensure that the normal operation of brushless electric machine, the hall interface circuit avoiding prior art when long-distance transmissions hall signal usually because of defect that interference effect easily causes motor to run well, achieve the accuracy of Signal transmissions, common-path interference.
Description
Technical field
The present invention relates to a kind of current conveying circuit, particularly relate to a kind of brshless DC motor hall sensor signal current conveying circuit.
Background technology
The application of current brushless electric machine in industrial transmission is more and more extensive.Brushless electric machine is generally all provided with hall position sensor, hall position sensor can detect the position of permanent magnet rotor relative to stator armature winding, thus determine turn-on sequence and the conduction angle of each power tube in driving circuit, thus control stator armature electric current, also the magnetic state of armature field is just controlled, realize electronic commutation, ensure that the normal operation of brushless electric machine.Hall output signal is generally all TTL signal, and signal amplitude is not more than 15V.And industrial environment forceful electric power signal is now many, environment is relatively more severe, adds weather environment such as thunder and lightning etc., and these forceful electric power signals can be easy to produce interference to weak electric signal, and hall signal is also easy to disturbed; Hall signal, once disturbed, will send into rub-out signal to controller, causes the misoperation of motor maybe cannot run.Interference phenomenon during general short-distance transmission hall signal is also not obvious, but once needs long range propagation hall signal, interference phenomenon is just obvious, such as some occasion industrial needs brushless electric machine and driver to be installed separately, this just needs long hall signal line, and driver will obtain reliable hall signal, just must consider the impact disturbed, avoid the mistake of software to commutate, thus ensure the normal operation of brushless electric machine.
Summary of the invention
For being easily disturbed and causing motor rotation abnormal defect when overcoming hall signal long range propagation that prior art exists, the present invention proposes a kind of brshless DC motor hall sensor signal current conveying circuit.Do not disturb by forceful electric power during this transmission circuit long range propagation, the defect causing motor not run well by external interference when avoiding transmission, and have low-power consumption, stability is high, and circuit structure is simple, the advantage that reliability is strong.
The technical solution adopted for the present invention to solve the technical problems is: comprise the power module 1 for powering to Hall element and operational amplifier, hall signal for being exported by Hall element carries out the signal prime processing module processed, for the voltage and current signal modular converter voltage of signal prime processing module output signal being carried out converting, the current signal for being exported by voltage and current signal modular converter is converted to voltage signal and realizes the signal isolation and amplifier module of signal isolation; For the power module 2 powering to signal isolation and amplifier module output terminal; Described hall element output voltage Vi is connected to the ground of power module 1 by series resistor R1, resistance R2; The dividing potential drop Ui of described resistance R2 is connected to the in-phase input end of operational amplifier A 1 and operational amplifier A 2, and the inverting input of operational amplifier A 1 is connected to the ground of power module 1 by series resistor R3; The inverting input of operational amplifier A 1 is connected to the output terminal of operational amplifier A 1 by series resistor R4, the output terminal of operational amplifier A 1 is connected to the emitter of triode T by series resistor Rx, the inverting input of operational amplifier A 2 is directly connected to the emitter of triode T, the output terminal of operational amplifier A 2 is connected to the base stage of triode T by series resistor R5, the collector of triode outputs signal the output current signal after being conversion;
The input anode of described signal isolator part P is connected to the collector of triode T, the input cathode of signal isolator part P is connected to the ground of power module 1, the output head anode of signal isolator part P is connected to the anode of power module 2 by pull-up resistor R6, the negative pole of output end of signal isolator part P is directly connected to the ground of power module 2, and the output head anode of signal isolator part P draws output voltage signal Vo;
The current signal io that described voltage and current signal modular converter exports is directly proportional to input voltage Vi, the current signal io that voltage and current signal modular converter exports and resistance Rx is inversely proportional to, and output current io drives rear class signal isolator part P to realize the output of voltage signal again.
Described power module 1 is two independent isolating power supplys with described power module 2, can not altogether.
Beneficial effect
A kind of brshless DC motor hall sensor signal current conveying circuit that the present invention proposes, it comprises two power modules, a hall signal prime processing module, a voltage and current signal modular converter and a signal isolation and amplifier module, wherein hall signal is processed by prime processing module, the output being input as hall signal prime processing module of voltage and current signal modular converter, the output being input as voltage and current signal modular converter of signal isolation and amplifier module, isolation signals output signal is output voltage signal, directly can carry out signal transacting by Access Control chip input interface, long range propagation brushless motor Hall signal is when being subject to the interference of extraneous forceful electric power, hall signal can not be disturbed, the hall interface circuit avoiding prior art when long-distance transmissions hall signal usually because of defect that interference effect easily causes motor to run well, achieve the accuracy of Signal transmissions, common-path interference, hall sensor signal current conveying circuit structure is simple, and has low in energy consumption, and stability is high, the advantage that reliability is strong.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, a kind of brshless DC motor hall sensor signal of the present invention current conveying circuit is described in further detail.
Fig. 1 is brshless DC motor hall sensor signal current conveying circuit module diagram of the present invention.
Fig. 2 is brshless DC motor hall sensor signal current conveying circuit figure of the present invention.
Embodiment
The present embodiment is a kind of brshless DC motor hall sensor signal current conveying circuit.The present embodiment only gives the circuit of a wherein road hall sensor signal, and other two-way is identical with this transmission circuit.
Consulting Fig. 1, brshless DC motor hall sensor signal current conveying circuit of the present invention, comprising the power module 1 for powering to Hall element 3 and operational amplifier; Hall signal for being exported by Hall element 3 carries out the signal prime processing module 4 processed; For the voltage and current signal modular converter 5 that the voltage of signal prime processing module 4 output signal is carried out converting; Current signal for being exported by voltage and current signal modular converter 5 is converted to voltage signal and realizes the signal isolation and amplifier module 6 of signal isolation; For the power module 2 powering to signal isolation and amplifier module 6 output terminal; Wherein, the power module 1 of powering to Hall element and operational amplifier is two independent isolating power supplys with the power module 2 of powering to signal isolation and amplifier module output terminal, can not altogether.
As shown in Figure 2, function realizing circuit figure of the present invention is by operational amplifier A 1, operational amplifier A 2, signal isolator part P, PNP triode T, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, 5th resistance R5, 6th resistance R6, 7th resistance Rx forms, circuit obtains in the following way: ground hall element output voltage Vi being connected to power module 1 by series resistor R1 and resistance R2, the voltage division signal Ui of resistance R2 is accessed the in-phase input end of operational amplifier A 1 and operational amplifier A 2, the inverting input of operational amplifier A 1 is connected to the ground of power module 1 by series resistor R3, the inverting input of operational amplifier A 1 is connected to the output terminal of operational amplifier A 1 by series resistor R4, the output terminal of operational amplifier A 1 is connected to the emitter of triode T by series resistor Rx, the inverting input of operational amplifier A 2 is directly connected to the emitter of triode T, the output terminal of operational amplifier A 2 is connected to the base stage of triode T by series resistor R5, the collector of triode outputs signal the output current signal after being conversion.The current signal io that voltage and current signal modular converter exports is directly proportional to input voltage Vi, and the current signal io that voltage and current signal modular converter exports and resistance Rx is inversely proportional to.Output current io drives rear class signal isolator part P to realize the output of voltage signal again.
Relational expression step is as follows:
The voltage on operational amplifier A 1 in-phase input end is made to be U
p1, the voltage on operational amplifier A 1 inverting input is U
n1, the voltage on operational amplifier A 2 in-phase input end is U
p2, the voltage on operational amplifier A 2 inverting input is U
n2, the voltage on operational amplifier A 1 output terminal is U1, and on triode T emitter, voltage is U2, and the hall signal voltage of input is V
i, the voltage on R1, R2 dividing potential drop R2 is U
i, the electric current on Rx is i, and long range propagation electric current is io, and signal isolator part output voltage is Vo.The pass of constrained input signal is:
U
p1＝U
n1＝U
i
U
p2＝U
n2＝U2＝U
i
∴
By giving brshless DC motor, hall device and transmission circuit are powered, when brshless DC motor operates, directly the Hall voltage signal that brshless DC motor exports is connected to after 15V pull-up the input end of circuit, Hall voltage signal is through the voltage division processing of front stage circuits, again the signal after process is sent into Voltage to current transducer module, now voltage signal is converted into current signal according to the relation derived, again by process after signal transmit, now that current signal transmits, due to the common-path interference of current delivery, thus can long range propagation be realized, again by current signal transfer to rear class signal isolation module, it is output voltage signal after isolation module, thus directly can send into controller and carry out signal transacting.
A kind of device preferred version of the present embodiment:
Signal isolator part selects optocoupler PC817, amplifier selects LM358, PNP triode selects 2SB449, R1=4k Ω, R2=R3=R4=1k Ω, Rx=1.5k Ω, R5=100 Ω, Vi=15V, during motor rotation, the current signal that the Hall voltage signal of 15V just can be exchanged into io=20mA transmits, and enhances the anti-interference of signal.The current signal of 20mA also can drive rear class optocoupler PC817 normally to work simultaneously, makes rear class output voltage signal, serves buffer action, also achieve the transmitting of signal simultaneously.
Conclusion: output current size and Hall voltage signal V
isize is directly proportional, and output current size and resistance Rx resistance are inversely proportional to, by selecting the resistance of resistance R1, R2, R3, R4, Rx, carry out the size of controls transfer electric current, and then can, by Current Control in rational scope, realize current delivery, and the delay of signal be very little.
Claims (2)
1. a brshless DC motor hall sensor signal current conveying circuit, it is characterized in that: comprise Hall element, first power module (1), signal prime processing module, voltage and current signal modular converter, signal isolation and amplifier module, second source module (2), described signal prime processing module comprises resistance R1, resistance R2, described voltage and current signal modular converter comprises operational amplifier A 1, operational amplifier A 2, resistance R3, resistance R4, resistance Rx, resistance R5, triode T, described signal isolation and amplifier module comprises signal isolator part P, resistance R6, described hall element output voltage Vi is by series resistor R1, resistance R2 is connected to the ground of the first power module (1), the component voltage Ui of described resistance R2 is connected to the in-phase input end of operational amplifier A 1 and operational amplifier A 2, and the inverting input of operational amplifier A 1 is connected to the ground of the first power module (1) by series resistor R3, the inverting input of operational amplifier A 1 is connected to the output terminal of operational amplifier A 1 by series resistor R4, the output terminal of operational amplifier A 1 is connected to the emitter of triode T by series resistor Rx, the inverting input of operational amplifier A 2 is directly connected to the emitter of triode T, the output terminal of operational amplifier A 2 is connected to the base stage of triode T by series resistor R5, the collector of triode T outputs signal the output current signal io after being conversion, the input anode of signal isolator part P is connected to the collector of triode T, the input cathode of signal isolator part P is connected to the ground of the first power module (1), the output head anode of signal isolator part P is connected to the anode of second source module (2) by pull-up resistor R6, the negative pole of output end of signal isolator part P is directly connected to the ground of second source module (2), and the output head anode of signal isolator part P draws output voltage signal Vo, the current signal io that described voltage and current signal modular converter exports is directly proportional to the component voltage Ui of described resistance R2, the current signal io that voltage and current signal modular converter exports and resistance Rx is inversely proportional to, and the current signal io of output drives rear class signal isolator part P to realize the output of voltage signal Vo again.
2. brshless DC motor hall sensor signal current conveying circuit according to claim 1, is characterized in that: described first power module (1) and described second source module (2) are two independent isolating power supplys, can not altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310311623.6A CN103412598B (en) | 2013-07-23 | 2013-07-23 | A kind of brshless DC motor hall sensor signal current conveying circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310311623.6A CN103412598B (en) | 2013-07-23 | 2013-07-23 | A kind of brshless DC motor hall sensor signal current conveying circuit |
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| CN103412598A CN103412598A (en) | 2013-11-27 |
| CN103412598B true CN103412598B (en) | 2015-09-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108207764A (en) * | 2018-01-05 | 2018-06-29 | 山东优万电子科技有限公司 | A kind of paddle aerator used for aquiculture |
| CN109085417A (en) * | 2018-08-16 | 2018-12-25 | 珠海英搏尔电气股份有限公司 | The current detection circuit and electric machine controller of direct measuring type Hall sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63310394A (en) * | 1987-06-08 | 1988-12-19 | Asmo Co Ltd | Driving method for blower brushless motor |
| CN202143025U (en) * | 2011-06-16 | 2012-02-08 | 深圳市亿芯智控科技有限公司 | Hall interface circuit |
| CN202694069U (en) * | 2012-08-03 | 2013-01-23 | 北京经纬恒润科技有限公司 | Vehicle window anti-pinch system |
-
2013
- 2013-07-23 CN CN201310311623.6A patent/CN103412598B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63310394A (en) * | 1987-06-08 | 1988-12-19 | Asmo Co Ltd | Driving method for blower brushless motor |
| CN202143025U (en) * | 2011-06-16 | 2012-02-08 | 深圳市亿芯智控科技有限公司 | Hall interface circuit |
| CN202694069U (en) * | 2012-08-03 | 2013-01-23 | 北京经纬恒润科技有限公司 | Vehicle window anti-pinch system |
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