CN204086853U - A kind of brshless DC motor speed variable analogue means - Google Patents
A kind of brshless DC motor speed variable analogue means Download PDFInfo
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- CN204086853U CN204086853U CN201420484883.3U CN201420484883U CN204086853U CN 204086853 U CN204086853 U CN 204086853U CN 201420484883 U CN201420484883 U CN 201420484883U CN 204086853 U CN204086853 U CN 204086853U
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Abstract
The utility model belongs to a kind of rotating speed analogue means, specifically a kind of brshless DC motor speed variable analogue means is disclosed, the input end of brushless DC motor control circuit voltage-pulse-width conversion circuit is connected with alignment circuit output terminal, the output terminal of voltage-pulse-width conversion circuit is connected with the input end of position encoded generation circuit, pulse distributor respectively, and the position encoded output terminal of generation circuit is connected with the input end of pulse distributor; The feedback end of voltage-pulse-width conversion circuit, pulse distributor is also connected with the feedback end of alignment circuit; The output terminal of pulse distributor is connected with the input end of isolated drive circuit, and the output terminal of isolated drive circuit is connected with the input end of power inversion circuit.This device can analog-driven brshless DC motor real-world operation operating mode, and structure is simple, easy to use, frequency of operation and efficiency high, more than 15000rpm high rotating speed simulation requirement can be met.
Description
Technical field
The utility model belongs to a kind of rotating speed analogue means, is specifically related to a kind of brshless DC motor speed variable analogue means.
Background technology
Along with the development of Power Electronic Technique, space flight servo-drive system recent development trend is for replacing brush motor to realize driven by energy function with brshless DC motor, the indispensable electronic installation that motor driver operates as brshless DC motor, energy and power engineering as the hydraulic servo of rocket Navigation Control is originated, and its functional reliability plays a decisive role to rocket flight success or failure.For ensureing the quality of production and the high reliability of motor driver, the core power device power inversion assembly of motor driver has to pass through the screening of the actual applying working condition of strict simulation in process of production.The electric hydaulic driven by energy device of space flight servo-drive system is in rotating speed Rapid Variable Design thus in the dynamic changing process that thereupon changes of load in flight course always, for realizing the power inverting assembly screening operation of the actual applying working condition of simulation space flight servo-drive system, JP sends out this device.
Because brshless DC motor remains the broad and level and smooth excellent governor control characteristics of brush DC motors, have that structure is simple, reliability is high, easy maintenance and an operational efficiency advantages of higher simultaneously.The continuous running of brshless DC motor needs the accurate commutation of Electronic Control, and it controls complexity also increases greatly, needs to have been come by special brushless direct current motor driver.
The necessary devices that motor driver controls as brshless DC motor running.For completing fact examination and the screening verification work of the power circuit of motor driver power amplifier board, need to simulate its rotating speed to it.
In prior art, brshless DC motor speed variable analogue means generally truly rotates generation by a real brshless DC motor under the driving of another motor driver, a set of motor driver must be equipped with, the speed variable simulation system of brshless DC motor and supporting large power supply composition, device structure bulky complex, involve great expense, complex operation, product batch production needs cannot be adapted to, and because general analogue means high speed performance is lower than the motor driver in this project, therefore the rotating speed simulation under the comparatively slow-speed of revolution (≤5000rpm) can only be realized, any speed conditions cannot be simulated.
Summary of the invention
The purpose of this utility model is to provide a kind of brshless DC motor speed variable analogue means, this device can analog-driven brshless DC motor real-world operation operating mode, structure is simple, easy to use, frequency of operation and efficiency high, more than 15000rpm high rotating speed simulation requirement can be met.
Realize the technical scheme of the utility model object: a kind of brshless DC motor speed variable analogue means, this packaging is put and is drawn together alignment circuit, brushless DC motor control circuit, isolated drive circuit, power inversion circuit; Brushless DC motor control circuit is made up of voltage-pulse-width conversion circuit, position encoded generation circuit and pulse distributor; The input end of voltage-pulse-width conversion circuit is connected with alignment circuit output terminal, the output terminal of voltage-pulse-width conversion circuit is connected with the input end of position encoded generation circuit, pulse distributor respectively, and the position encoded output terminal of generation circuit is connected with the input end of pulse distributor; The feedback end of voltage-pulse-width conversion circuit, pulse distributor is also connected with the feedback end of alignment circuit; The output terminal of pulse distributor is connected with the input end of isolated drive circuit, and the output terminal of isolated drive circuit is connected with the input end of power inversion circuit.
Described alignment circuit is slide rheostat, and one end of slide rheostat is connected with the input end of voltage-pulse-width conversion circuit, and the other end of slide rheostat is connected with the feedback end of pressure-pulse-width conversion circuit, pulse distributor.
Described isolated drive circuit is made up of multiple optocouplers of parallel connection, and the former limit of multiple optocoupler is all connected with pulse distributor output terminal, and the secondary of multiple optocoupler is all connected with the input end of power inversion circuit.
Described isolated drive circuit comprises the first optocoupler, the second optocoupler, the 3rd optocoupler, the 4th optocoupler, the 5th optocoupler, the 6th optocoupler; The former limit of the first optocoupler, the second optocoupler, the 3rd optocoupler, the 4th optocoupler, the 5th optocoupler, the 6th optocoupler is connected with pulse distributor output terminal; The secondary of the first optocoupler, the second optocoupler, the 3rd optocoupler, the 4th optocoupler, the 5th optocoupler, the 6th optocoupler is connected with the input end of power inversion circuit.
Described power inversion circuit is that three phase full bridge connection forms by multiple field effect transistor, and the grid G of each field effect transistor is connected with the secondary of an optocoupler separately.
Described power inversion circuit comprises the first field effect transistor, the second field effect transistor, the 3rd field effect transistor, the 4th field effect transistor, the 5th field effect transistor, the 6th field effect transistor, and the secondary of the first optocoupler, the second optocoupler, the 3rd optocoupler, the 4th optocoupler, the 5th optocoupler, the 6th optocoupler is connected with the grid G of the first field effect transistor, the second field effect transistor, the 3rd field effect transistor, the 4th field effect transistor, the 5th field effect transistor, the 6th field effect transistor respectively; Be connected to each other between the drain D of the first field effect transistor, the second field effect transistor, the 3rd field effect transistor, between the drain D of the source S of the source S of the first field effect transistor, the source S of the second field effect transistor, the 3rd field effect transistor, the drain D of the 4th field effect transistor, the 5th field effect transistor, the drain D of the 6th field effect transistor, be connected to each other the output terminal forming brshless DC motor drive current; Be connected to each other between the source S of the source S of the 4th field effect transistor, the source S of the 5th field effect transistor, the 6th field effect transistor.
Advantageous Effects of the present utility model is: (1) the utility model is using the voltage signal of alignment circuit as speed controling signal, by the pulse-width control signal of Closed-loop control, input using the digital rotary speed instruction that processor exports as instruction, in real time produce with rotary speed instruction identical hypothetical rotor position signal according to rotational speed setup voltage according to rotary speed instruction by brushless DC motor control circuit, reach the object making power device on off state consistent with actual condition.(2) the three-phase drive control signal of corresponding motor speed simulation is produced according to analog voltage, by adjusting the rotating speed simulating signal that corresponding rotating speed magnitude of voltage can obtain corresponding in real time, reaching and the height of varying duty time-dependent current operating mode in rocket servo control mechanism flight course is unanimously simulated.(3) achieve and changed to pwm signal by rotational speed setup voltage signal, and the pwm signal produced voluntarily after the three-phase distribution of corresponding rotating speed, can the on off state of real simulation driver under electro-hydraulic servomechanism duty, eliminate actual electro-hydraulic servomechanism, reduce production cost.(4) possess according to rotating speed analog voltage generation alternation three-phase drive control signal (PWM1 ~ PWM6) function, the program is complicated reliable, development difficulty is large, frequency of operation is up to 1MHz, real-time is high, thus can adapt to more than 15000rpm high rotating speed simulation requirement, and work efficiency is high.(5) isolated drive circuit realizes the completely isolated and reliable driving of power circuit and control circuit, power inversion circuit high voltagehigh frequency switching process is prevented to produce interference to control circuit, there is good Electro Magnetic Compatibility, simultaneously, buffer circuit has blocked the connection between power circuit and weak control circuit, improve the security of weak control circuit work, comprehensively ensure that product high reliability.(6) brushless DC motor control circuit is integrated with position of rotation coding self-generating function, the alternation position of rotation coding of actual translator running still can be simulated when there is no motor rotation, thus make power inverting assembly in the true Operation Conditions work of simulated machine, reach real working condition band and carry screening object.(7) this device achieves the functions such as variable speed simulation and power circuit driving with the simplest circuit structure, equivalence can replace servo control mechanism variable working condition, variable speed fact work, function is complete, in process of producing product, effectively simplify filler test frock, serve good effect; Equipment simplifies greatly, and circuit structure is simple.
Accompanying drawing explanation
Fig. 1 is the system diagram of a kind of brshless DC motor speed variable analogue means provided by the utility model;
Fig. 2 is the circuit theory diagrams of a kind of brshless DC motor speed variable analogue means provided by the utility model.
In figure: 1. alignment circuit, R. slide rheostat;
2. brushless DC motor control circuit, 201. voltages-pulse-width conversion circuit; 202. position encoded generation circuit, 203. pulse distributors;
3. isolated drive circuit, 301. first optocouplers, 302. second optocouplers, 303. the 3rd optocouplers, 304. the 4th optocouplers, 305. the 5th optocouplers, 306. the 6th optocouplers;
4. power inversion circuit, 401. first field effect transistor, 402. second field effect transistor, 403. the 3rd field effect transistor, 404. the 4th field effect transistor, 405. the 5th field effect transistor, 406. the 6th field effect transistor;
5. brshless DC motor.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, a kind of brshless DC motor speed variable analogue means provided by the utility model, comprises alignment circuit 1, brushless DC motor control circuit 2, isolated drive circuit 3, power inversion circuit 4; Brushless DC motor control circuit 2 is made up of voltage-pulse-width conversion circuit 201, position encoded generation circuit 202 and pulse distributor 203.The input end of voltage-pulse-width conversion circuit 201 is connected with alignment circuit 1 output terminal, the output terminal of voltage-pulse-width conversion circuit 201 is connected with the input end of position encoded generation circuit 202, pulse distributor 203 respectively, and the output terminal of position encoded generation circuit 202 is connected with the input end of pulse distributor 203.Voltage-pulse-width conversion circuit 201 output pulse width modulation signal is respectively to position encoded generation circuit 202 and pulse distributor 203, the digital rotating speed analog position coding that pulse-width signal process is converted to this pulsewidth corresponding by position encoded generation circuit 202 exports to pulse distributor 203, digital rotating speed analog position coding is carried out sector logical operation and produces 6 way switch vectors by pulse distributor 203, and the pulse-width signal that 6 way switch vectors and voltage-pulse-width conversion circuit 201 export carries out logical and and produces 6 road PWM vectors.The output terminal of pulse distributor 203 is connected with the input end of isolated drive circuit 3, and the output terminal of isolated drive circuit 3 is connected with the input end of power inversion circuit 4.
As shown in Figure 2, alignment circuit 1 is slide rheostat R, and fast circuit 1 produces or receive the rotational speed regulation voltage signal of the change that brshless DC motor produces by rheostat R, the corresponding motor speed 0 ~ 15000rpm of rotational speed regulation voltage signal 0 ~ 10V.The sliding end of slide rheostat R is connected with the input end of voltage-pulse-width conversion circuit 201, and the sliding end of slide rheostat R is connected with the feedback end of voltage-pulse-width conversion circuit 201, pulse distributor 203.
Brushless DC motor control circuit 2 adopts the chip of the model A3P250 of Actel company.
As shown in Figure 2, isolated drive circuit 3 is made up of the first optocoupler 301, second optocoupler 302 of parallel connection, the 3rd optocoupler 303, the 4th optocoupler 304, the 5th optocoupler 305, the 6th optocoupler 306.First optocoupler 301, second optocoupler 302, the 3rd optocoupler 303, the 4th optocoupler 304, the 5th optocoupler 305, the 6th optocoupler 306 all can adopt model to be the optocoupler of HCPL4504.The former limit of the former limit of the first optocoupler 301, the former limit of the second optocoupler 302, the 3rd optocoupler 303, the former limit of the 4th optocoupler 304, the former limit of the 5th optocoupler 305, the former limit of the 6th optocoupler 306 are all connected with pulse distributor 203 output terminal.The secondary of the secondary of the first optocoupler 301, the secondary of the second optocoupler 302, the 3rd optocoupler 303, the secondary of the 4th optocoupler 304, the secondary of the 5th optocoupler 305, the secondary of the 6th optocoupler 306 are all connected with the input end of power inversion circuit 4.
As shown in Figure 2, power inversion circuit 4 is made up of the first field effect transistor 401, second field effect transistor 402, the 3rd field effect transistor 403, the 4th field effect transistor 404, the 5th field effect transistor 405, the 6th field effect transistor 406.Namely power inversion circuit (4) is that three phase full bridge connection forms by six groups of field effect transistor MOSFET, and the model of field effect transistor is IXTV110N25TS.The secondary of the first optocoupler 301 is connected with the grid G of the first field effect transistor 401, the secondary of the second optocoupler 302 is connected with the grid G of the second field effect transistor 402, the secondary of the 3rd optocoupler 303 is connected with the grid G of the 3rd field effect transistor 403, the secondary of the 4th optocoupler 304 is connected with the grid G of the 4th field effect transistor 404, the secondary of the 5th optocoupler 305 is connected with the grid G of the 5th field effect transistor 405, and the secondary of the 6th optocoupler 306 is connected with the grid G of the 6th field effect transistor 406.Be connected to each other between the drain D of the first field effect transistor 401, second field effect transistor 402, the 3rd field effect transistor 403, between the drain D of the source S of the source S of the first field effect transistor 401, the source S of the second field effect transistor 402, the 3rd field effect transistor 403, the drain D of the 4th field effect transistor 404, the 5th field effect transistor 405, the drain D of the 6th field effect transistor 406, be connected to each other the output terminal forming brshless DC motor drive current.Be connected to each other between the source S of the source S of the 4th field effect transistor 404, the source S of the 5th field effect transistor 405, the 6th field effect transistor 406.
As shown in Fig. 1 and Tu, the principle of work of a kind of brshless DC motor speed variable analogue means provided by the utility model is as follows: alignment circuit 1 produces or receive the rotational speed regulation voltage signal of the change that brshless DC motor produces according to slide rheostat R, and this rotational speed regulation voltage signal voltage-pulse-width conversion circuit 201 transferred in brushless DC motor control circuit 2 produces the single channel pwm signal of corresponding pulsewidth.Single channel pwm signal simultaneously in-position coding produces circuit 202 and pulse distributor 203, and position encoded generation circuit 202 produces the digit position coding of cycle accumulor according to pwm signal, and by digit position coding input pulse distributor 203.Pulse distributor 203 produces three-phase drive control signal PWM1 ~ PWM6 according to single channel pwm signal and digit position coding.The optocoupler that three-phase drive control signal PWM1 ~ PWM6 exports isolated drive circuit 3 to different through 6 tunnels respectively carries out isolation drive and amplifies enhancing, and namely three-phase drive control signal PWM1 ~ PWM6 is respectively through the first optocoupler 301, second optocoupler 302, the 3rd optocoupler 303, the 4th optocoupler 304, the 5th optocoupler 305, the 6th optocoupler 306 isolation drive.Isolation drive also amplifies the drive singal of grid G that the three-phase drive control signal PWM1 ~ PWM6 after strengthening produces driving first field effect transistor 401, second field effect transistor 402, the 3rd field effect transistor 403, the 4th field effect transistor 404, the 5th field effect transistor 405, the 6th field effect transistor 406 respectively.First field effect transistor 401, second field effect transistor 402, the 3rd field effect transistor 403, the 4th field effect transistor 404, the 5th field effect transistor 405, the 6th field effect transistor 406 are according to grid G drive singal continuous switch in turn, first field effect transistor 401, second field effect transistor 402, the 3rd field effect transistor 403, the 4th field effect transistor 404, the 5th field effect transistor 405, the 6th field effect transistor 406 produce the exchange current driving brshless DC motor 5 to operate continuously, thus realize analog-driven brshless DC motor real-world operation operating mode.
In conjunction with the accompanying drawings and embodiments the 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.The content be not described in detail in the utility model all can adopt prior art.
Claims (6)
1. a brshless DC motor speed variable analogue means, is characterized in that: this device comprises alignment circuit (1), brushless DC motor control circuit (2), isolated drive circuit (3), power inversion circuit (4); Brushless DC motor control circuit (2) is made up of voltage-pulse-width conversion circuit (201), position encoded generation circuit (202) and pulse distributor (203); The input end of voltage-pulse-width conversion circuit (201) is connected with alignment circuit (1) output terminal, the output terminal of voltage-pulse-width conversion circuit (201) is connected with the input end of position encoded generation circuit (202), pulse distributor (203) respectively, and the output terminal of position encoded generation circuit (202) is connected with the input end of pulse distributor (203); The feedback end of voltage-pulse-width conversion circuit (201), pulse distributor (203) is also connected with the feedback end of alignment circuit (1); The output terminal of pulse distributor (203) is connected with the input end of isolated drive circuit (3), and the output terminal of isolated drive circuit (3) is connected with the input end of power inversion circuit (4).
2. a kind of brshless DC motor speed variable analogue means according to claim 1, it is characterized in that: described alignment circuit (1) is slide rheostat, one end of slide rheostat is connected with the input end of voltage-pulse-width conversion circuit (201), and the other end of slide rheostat is connected with the feedback end of pressure-pulse-width conversion circuit (201), pulse distributor (203).
3. a kind of brshless DC motor speed variable analogue means according to claim 2, it is characterized in that: described isolated drive circuit (3) is made up of multiple optocouplers of parallel connection, the former limit of multiple optocoupler is all connected with pulse distributor (203) output terminal, and the secondary of multiple optocoupler is all connected with the input end of power inversion circuit (4).
4. a kind of brshless DC motor speed variable analogue means according to claim 3, is characterized in that: described isolated drive circuit (3) comprises the first optocoupler (301), the second optocoupler (302), the 3rd optocoupler (303), the 4th optocoupler (304), the 5th optocoupler (305), the 6th optocoupler (306); The former limit of the first optocoupler (301), the second optocoupler (302), the 3rd optocoupler (303), the 4th optocoupler (304), the 5th optocoupler (305), the 6th optocoupler (306) is connected with pulse distributor (203) output terminal; The secondary of the first optocoupler (301), the second optocoupler (302), the 3rd optocoupler (303), the 4th optocoupler (304), the 5th optocoupler (305), the 6th optocoupler (306) is connected with the input end of power inversion circuit (4).
5. a kind of brshless DC motor speed variable analogue means according to claim 4, it is characterized in that: described power inversion circuit (4) is that three phase full bridge connection forms by multiple field effect transistor, and the grid G of each field effect transistor is connected with the secondary of an optocoupler separately.
6. a kind of brshless DC motor speed variable analogue means according to claim 4, it is characterized in that: described power inversion circuit (4) comprises the first field effect transistor (401), second field effect transistor (402), 3rd field effect transistor (403), 4th field effect transistor (404), 5th field effect transistor (405), 6th field effect transistor (406), first optocoupler (301), second optocoupler (302), 3rd optocoupler (303), 4th optocoupler (304), 5th optocoupler (305), the secondary of the 6th optocoupler (306) respectively with the first field effect transistor (401), second field effect transistor (402), 3rd field effect transistor (403), 4th field effect transistor (404), 5th field effect transistor (405), the grid G of the 6th field effect transistor (406) connects, be connected to each other between the drain D of the first field effect transistor (401), the second field effect transistor (402), the 3rd field effect transistor (403), between the drain D of the source S of the source S of the first field effect transistor (401), the source S of the second field effect transistor (402), the 3rd field effect transistor (403), the drain D of the 4th field effect transistor (404), the 5th field effect transistor (405), the drain D of the 6th field effect transistor (406), be connected to each other the output terminal forming brshless DC motor drive current, be connected to each other between the source S of the source S of the 4th field effect transistor (404), the source S of the 5th field effect transistor (405), the 6th field effect transistor (406).
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| CN201420484883.3U CN204086853U (en) | 2014-08-26 | 2014-08-26 | A kind of brshless DC motor speed variable analogue means |
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| CN201420484883.3U CN204086853U (en) | 2014-08-26 | 2014-08-26 | A kind of brshless DC motor speed variable analogue means |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761858A (en) * | 2018-07-25 | 2020-02-07 | 中国石油化工股份有限公司 | Reheating generator set simulation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761858A (en) * | 2018-07-25 | 2020-02-07 | 中国石油化工股份有限公司 | Reheating generator set simulation system |
| CN110761858B (en) * | 2018-07-25 | 2022-03-08 | 中国石油化工股份有限公司 | Reheating generator set simulation system |
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