CN204046475U - A kind of down-hole brushless DC motor driving controller - Google Patents
A kind of down-hole brushless DC motor driving controller Download PDFInfo
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- CN204046475U CN204046475U CN201420526346.0U CN201420526346U CN204046475U CN 204046475 U CN204046475 U CN 204046475U CN 201420526346 U CN201420526346 U CN 201420526346U CN 204046475 U CN204046475 U CN 204046475U
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Abstract
The utility model relates to a kind of down-hole brshless DC motor without position driving governor, comprises power circuit, drive circuit, communicating circuit, pressure acquisition circuit and main control unit.Drive circuit receives the control signal of main control unit, and pressure signal is sent to main control unit by pressure acquisition circuit, and pressure set points is sent to main control unit by communicating circuit, and power circuit is electrically connected with above-mentioned each unit and powers.Driving governor of the present utility model have employed motor without position sensor control mode, does not need to install rotor-position sensor on motor, has the advantages such as with low cost, reliability is high, cable is simple; Driving governor of the present utility model has intelligent pressure controlling functions, can control by complete independently underground liquid pressure arm, is the important technology guarantee of research and development small size vertical drilling tool.
Description
Technical field
The utility model relates to brshless DC motor drived control field, down-hole, is specifically related to a kind of hydraulic pressure closed loop intelligent drives control circuit of the position-sensor-free type of drive for oil-well drilling equipment underground liquid pressure arm brshless DC motor.
Background technology
Downhole petroleum equipment work under bad environment, arrangement space is narrow and small, and reliability requirement is high, must can rapid-maintenance or replacing once break down.But Related product domestic is at present all based on hall position sensor or revolves change position transducer, completes electronics commutation by detection rotor positional information, realize brshless DC motor drived control.The use of position transducer not only increases manufacture and the maintenance cost of brshless DC motor, increase motor size, be unfavorable for the research and development of small size underground equipment, also the application of Related product is made to be limited to the environmental suitability of position transducer, and the relativeness of driving governor product and position transducer is fixed, need during maintenance again to match use according to position sensor information, the quick-replaceable of product is deteriorated.
Utility model content
The purpose of this utility model is to provide a kind of hydraulic pressure closed loop intelligent drives controller for underground liquid pressure arm brshless DC motor, this Drive and Control Circuit have employed motor without position sensor control mode, do not need that mechanical position sensor is installed and detect motor rotor position signal to realize electronics commutation, and the electronics commutation point of brshless DC motor only need be calculated in real time by the physical quantity such as operating voltage, operating current detected in drive circuit, avoid all drawback of position transducer in underground equipment application.
Realize the technical scheme of the utility model object: a kind of hydraulic pressure closed loop intelligent drives controller for underground liquid pressure arm brshless DC motor, wherein, comprise power circuit, drive circuit, communicating circuit, pressure acquisition circuit and main control unit, drive circuit receives the control signal of main control unit, pressure signal is sent to main control unit by pressure acquisition circuit, pressure set points is sent to main control unit by communicating circuit, and power circuit is electrically connected with above-mentioned each unit and powers.
Driving governor also comprises protective circuit, and power circuit provides the energy for protective circuit, and operating current and operating voltage signal are sent to protective circuit by drive circuit, and guard signal is sent to main control unit by protective circuit.
Described drive circuit receives the pwm control signal of main control unit, amplifies the work of rear drive inverter circuit through boostrap circuit signal; Hydraulic arm pressure sensor signal is transformed to digital signal by pressure acquisition circuit, send to main control unit, the pressure set points that pressure signal and communicating circuit receive is carried out closed loop computing by main control unit, exports PWM and controls brshless DC motor rotation to drive circuit.
Described protective circuit monitoring driving circuital current, voltage, judged the operating state of drive circuit by protective circuit, once occur abnormal, protective circuit output protection signal is to main control unit, and the main control unit short time closes PWM and exports to protect drive circuit.
Described power circuit receives 24 ~ 48V wide region DC power supply, is transformed into+5V ,+3.3V needed for driving governor self ,+1.8V power supply, and needed for pressure sensor ± 15V power supply.
Described main control unit gathers drive circuit works voltage, operating current, according to electronics commutation algorithm, calculates brushless dc organic electronic commutation point in real time, and realize the drived control of brshless DC motor by the high-speed data processing capacity of main control unit.
Described communicating circuit is used for the digital bus communications function of driving governor and external equipment, receives external pressure command value, returns driving governor operating state.
Described control chip is high-performance digital signal processor DSP, and described communicating circuit is CAN transceiver.
Advantageous Effects of the present utility model: driving governor of the present utility model does not use mechanical position sensor to detect motor rotor position information, there are following three large advantages: first, reduce brshless DC motor manufacturing cost, reducing motor body size, is the important technology guarantee of minor caliber down equipment research and development; Secondly, brshless DC motor body can at reliably working under comparatively rugged environment, and between driving governor and motor, connection cable is succinct, and global reliability is high; Again, driving governor is good to matching between motor, can quick-replaceable, and maintainability is good.Driving governor product carries pressure closed loop and number bus communication simultaneously, and cancel closedown monitoring, once find that motor abnormality stops, again can rotating by drive motors in 2s.Above feature makes driving governor product can realize the highly reliable drived control of brshless DC motor as independently intelligent unit.
Accompanying drawing explanation
A kind of down-hole brshless DC motor that Fig. 1 carries for the utility model is without the system schematic of position driving governor;
A kind of down-hole brshless DC motor that Fig. 2 carries for the utility model is without the structural representation of position driving governor.
In figure: 1. power circuit, 2. drive circuit, 3. communicating circuit, 4. pressure acquisition circuit, 5. protective circuit; 6. main control unit, 7. miniature DC/DCI, 8. miniature DC/DCII, 9. signal conditioning circuit, 10. bootstrapping drives; 11. three-phase inversions, 12. current detecting, 13. voltage detecting, 14. relay protective scheme.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, a kind of hydraulic pressure closed loop intelligent drives controller for underground liquid pressure arm brshless DC motor, it comprises power circuit 1, drive circuit 2, communicating circuit 3, pressure acquisition circuit 4, protective circuit 5, main control unit 6.Power circuit 1 is drive circuit 2, communicating circuit 3, pressure acquisition circuit 4, protective circuit 5 and main control unit 6 provide the reliable and stable energy; Drive circuit 2 receives the pwm control signal of main control unit 6, amplifies the work of rear drive brshless DC motor through signal; The analog signal of pressure sensor in hydraulic arm is transformed to digital signal and send main control unit 6 by pressure acquisition circuit 4, and the pressure set points that pressure signal and communicating circuit 3 receive is carried out closed loop computing, exports PWM and controls brshless DC motor rotation to drive circuit 2; Operating current, the operating voltage signal of drive circuit 2 enter protective circuit 5, the operating state of drive circuit 2 is judged by protective circuit 5, once occur abnormal, protective circuit 5 output protection signal is to main control unit 6, and main control unit 6 will be closed PWM the short time and be exported to protect driving governor; Simultaneously the operating current of drive circuit 2, operating voltage signal send main control unit 6 after being nursed one's health by signal conditioning circuit, and the commutation moment of brshless DC motor is calculated in real time by the electronics commutation algorithm of main control unit 6, after the power amplification of overdrive circuit 2, control brshless DC motor rotate.
As shown in Figure 2, power circuit 1 comprises miniature DC/DCI7 and miniature DC/DCII8, and wherein 24 ~ 48V wide region D.C. regulated power supply is transformed to ± 15V and+5V by miniature DC/DCI7; + 5V DC power supply is transformed to+3.3V and+1.8V by miniature DC/DCII8 further, for driving governor provides the energy.
Drive circuit 2 adopts power drive integrated chip 10, and integrated level is high, volume is little, and type of drive drives for bootstrapping, and this type of drive compact conformation, peripheral component quantity used is few, drive efficiency is high; Three-phase inverting circuit 11 adopts three-phase MOSFET bridge, and MOSFET power device has the advantage that voltage driven, switching loss are little, be suitable for low voltage application.
Communicating circuit 3 adopts highly reliable CAN digital bus communications, mainly completes pressure instruction reception, time synchronized control, bus reset instruction and driving governor operating state and returns.
Protective circuit 5 comprises the multiple protective such as overcurrent protection and under-voltage protection pattern; wherein drive circuit works current transitions is magnitude of voltage by sampling resistor by overcurrent protection; compare generation over-current signal by voltage comparator with set point, and then realize electric current reduction object by main control unit 6 short-time switching-off drive circuit 2.
Main control unit 6 is control cores of driving governor, adopt high-performance digital signal processor DSP, mainly complete motor rotor position detection, motor speed calculating, pressure acquisition, pressure closed loop computing, pwm control signal generate class real time motor and run control task, and communication management, operating state return class un-real time job.Main control unit gathers drive circuit works voltage, operating current, according to electronics commutation algorithm, calculates brushless dc organic electronic commutation point in real time, and realize the drived control of brshless DC motor by the high-speed data processing capacity of main control unit.
Driving governor has software online management function, can be communicated by communicating circuit 3 with host computer, is realized software upgrading and the version management of driving governor by upper computer software, improves reliability and the maintainability of driving governor.
Driving governor has cancel closedown autoboot function; operating voltage, the operating current of main control unit 6 Real-Time Monitoring drive circuit 2; once find that brshless DC motor is improper out of service; main control unit 6 reset control logic immediately; again drive motors rotates, and detects that shutting down to the time interval restarted is less than 2s.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from the utility model aim.
Claims (8)
1. the driving governor for underground liquid pressure arm brshless DC motor, it is characterized in that: comprise power circuit (1), drive circuit (2), communicating circuit (3), pressure acquisition circuit (4) and main control unit (6), drive circuit (2) receives the control signal of main control unit (6), pressure signal is sent to main control unit (6) by pressure acquisition circuit (4), pressure set points is sent to main control unit (6) by communicating circuit (3), main control unit (6) gathers the operating current of drive circuit (2), operating voltage signal, power circuit (1) is electrically connected with above-mentioned each unit and powers.
2. driving governor according to claim 1; it is characterized in that: also comprise protective circuit (5); power circuit (1) is protective circuit (5) power supply; operating current and operating voltage signal are sent to protective circuit (5) by drive circuit (2), and guard signal is sent to main control unit (6) by protective circuit (5).
3. driving governor according to claim 1, it is characterized in that: hydraulic arm pressure sensor signal is transformed to digital signal by described pressure acquisition circuit (4), send to main control unit (6), the pressure set points that pressure signal and communicating circuit (3) receive is carried out closed loop computing by main control unit (6), export PWM and control brshless DC motor rotation to drive circuit (2), realize downhole intelligent and control.
4. driving governor according to claim 1, is characterized in that: main control unit (6) is realized and external device communication by communicating circuit (3), and communication mode adopts high reliability CAN number bus technology.
5. driving governor according to claim 3, is characterized in that: develop software online management function, is realized software upgrading and the version management of driving governor by communicating circuit (3).
6. driving governor according to claim 2; it is characterized in that: the operating current of drive circuit (2), operating voltage signal enter protective circuit (5); the operating state of drive circuit (2) is judged by protective circuit (5); once occur abnormal; protective circuit (5) output protection signal is to main control unit (6), and main control unit (6) will be closed PWM the short time and be exported to protect drive circuit (2).
7. driving governor according to claim 1, it is characterized in that: main control unit (6) gathers operating voltage, the operating current of drive circuit (2), by electronics commutation algorithm, in the commutation moment of real-time calculating brshless DC motor, control the driving of brshless DC motor.
8. driving governor according to claim 7; it is characterized in that: operating voltage, the operating current of main control unit (6) monitoring drive circuit (2); when find brshless DC motor improper out of service time; main control unit (6) reset control logic; again drive motors rotates, and shuts down the time interval restarted and is less than 2s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420526346.0U CN204046475U (en) | 2014-09-13 | 2014-09-13 | A kind of down-hole brushless DC motor driving controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420526346.0U CN204046475U (en) | 2014-09-13 | 2014-09-13 | A kind of down-hole brushless DC motor driving controller |
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| Publication Number | Publication Date |
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| CN204046475U true CN204046475U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420526346.0U Active CN204046475U (en) | 2014-09-13 | 2014-09-13 | A kind of down-hole brushless DC motor driving controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682791A (en) * | 2014-09-13 | 2015-06-03 | 北京精密机电控制设备研究所 | Underground brushless direct current motor drive controller |
| CN107370422A (en) * | 2015-07-06 | 2017-11-21 | 湖南工业大学 | A kind of single phase poaer supply line sends the circuit of more DC brushless motor speed-regulating signals |
-
2014
- 2014-09-13 CN CN201420526346.0U patent/CN204046475U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682791A (en) * | 2014-09-13 | 2015-06-03 | 北京精密机电控制设备研究所 | Underground brushless direct current motor drive controller |
| CN107370422A (en) * | 2015-07-06 | 2017-11-21 | 湖南工业大学 | A kind of single phase poaer supply line sends the circuit of more DC brushless motor speed-regulating signals |
| CN107370422B (en) * | 2015-07-06 | 2019-08-06 | 湖南工业大学 | A kind of single phase poaer supply line sends the circuit of more DC brushless motor speed-regulating signals |
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