CN204179974U - Brushless DC motor revolution speed control device - Google Patents
Brushless DC motor revolution speed control device Download PDFInfo
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- CN204179974U CN204179974U CN201420568852.6U CN201420568852U CN204179974U CN 204179974 U CN204179974 U CN 204179974U CN 201420568852 U CN201420568852 U CN 201420568852U CN 204179974 U CN204179974 U CN 204179974U
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Abstract
The utility model relates to Brushless DC motor revolution speed control device, includes a Brushless DC motor, at least one hall sensing element, an inverter circuit, a gate drive circuit and a microcontroller.Mainly produce the output of high torsion when the slow-speed of revolution operates through the mutual mode of the coil circuit of two stators that drives, and through the rotating speed control effects driving the mode of the coil circuit of arbitrary stator to produce low torsion when high rotation speed operation to export, high-power power supply is not needed to operate by starter, and can switch at motor running and change to drive the mode of the coil circuit of arbitrary stator to operate to the rotating speed of setting, not only can reduce the restriction that Brushless DC motor uses power supply, and also relatively electric energy is saved in the full-time operation process of Brushless DC motor, and then produce the output of high torsion when reaching slow-speed of revolution running, and the rotating speed control effects of low torsion output is produced when high rotation speed operation, the brushless motor control device that the change of large-scale velocity of rotation is corresponding can be carried out.
Description
Technical field
The utility model, about a kind of motor rotary speed control technology, aims to provide one and can produce the output of high torsion when the slow-speed of revolution operates, and produce the Brushless DC motor revolution speed control device of low torsion output when high rotation speed operation.
Background technology
Press, motor (also known as motor) mainly can convert electrical energy into mechanical energy, use driving device to rotate, vibrate or rectilinear motion, and be extensively employed for automatically controlling and electromechanical integration field, more there are many household appliances on the living conditions, all need to apply to motor to carry out the running of being correlated with, more and more variation is used also in type and the work of relative motor.
Although the kind of motor is a lot, according to the difference of drive current, roughly can be divided into d.c. motor and alternating current motor, and for basic structure, forms primarily of stator (Stator) and rotor (Rotor); Wherein, although alternating current motor structure is simply cheap, early stage because speed Control is comparatively difficult, be mainly used in the application scenario of determining rotating speed or multistage speed change in the past.
Because alternating current motor is when real-world operation, its rotating speed is directly proportional to the power frequency of input, the higher rotating speed of frequency is faster in principle, along with application of frequency converter industrially has suitable time in the speed Control of alternating current motor, add the fast development of large scale integrated circuit in recent years, the progress of power electronic element, the software that complicated control law is able to based on mat microprocessor is achieved, the speed Control of alternating current motor can be reached by digital converter drive unit, and then be widely used in various field.
The rotor of general d.c. motor is electromagnet (being coiled into enamelled wire), stator is then permanent magnet, take permanent magnet as the magnetic field of surrounding, the electromagnet that coil is coiled into is center roller, mainly through changing sense of current mode in good time, reach the object making rotor can continue rotation according to same direction; Such as, have brush d.c. motor to flow through brush by electric current to rotate through armature again, the generation of its vertical magnetic field adopts the congruence winding increasing many groups on rotor, via the adjustment of brush (brush) with commutation (commuttor), make the electric current of inflow armature, rotor field can be controlled and remain on the direction of vertical magnetic field.
As for, Brushless DC motor mainly solves brush and the phase changer maintenance issues of brush d.c. motor, its operating principle with have the maximum difference of brush direct current motor, be that Brushless DC motor changes the commutation with electronic type, reach the object making rotor and stator field remain on predetermined phase difference.
But, when the existing Brushless DC motor commonly used is for carrying out adjustment of rotational speed, though can pass through the mode changing piezoelectric voltage to reach, can feel comparatively easily simple by contrast, but when if motor adds load, turn round hypodynamic problem by seriously causing, must select the power supply of relatively high power that motor can be allowed to start running from inactive state, so not only cause the restriction of the available power supply of Brushless DC motor, and in the full-time operation process of Brushless DC motor also relatively consume electric power.
Utility model content
Namely the technical problem that the utility model solves is providing a kind of Brushless DC motor revolution speed control device, makes applied Brushless DC motor can produce high torsion when the slow-speed of revolution operates and exports, and produce the output of low torsion when high rotation speed operation.
The technological means that the utility model adopts is as described below.
Object is taken off for reaching, Brushless DC motor revolution speed control device of the present utility model, at least include: a Brushless DC motor, be provided with two stators, a rotor, these two stators are along an identical axle center spread configuration, each stator has one in circular body, the stator tooth extended towards this body central is provided with in this body, a boots portion is formed in each stator tooth tail end, the coil of predetermined lock number is arranged with on each stator tooth, and the boots portion of these two stators is interlaced around being a circular hole configuration, this rotor is located in the circular hole configuration of these two stators relatively, this rotor in a rotating shaft around being provided with plural permanet magnet, and total permanet magnet is to form the interconnected mode spread configuration in south/arctic in this rotating shaft periphery, one inverter circuit, is electrically connected in two of this Brushless DC motor between stator and DC power supply, and gate drive circuit and a microcontroller, form this microcontroller by this gate drive circuit and this inverter circuit is electrically connected, connected by this microcontroller and outsidely pass speed control signal.
Utilize above-mentioned technical characteristic, Brushless DC motor revolution speed control device of the present utility model, in time using, two stators are formed and DC power supply is electrically connected through inverter circuit, and under coordinating the integrating operation of microcontroller and gate drive circuit, according to the signal that received rotating speed control signal and hall sensing element transmit, to drive the coil circuit of two stators alternately, or drive the mode of coil circuit of arbitrary stator, allow be energized stator and rotor form interaction electromagnetic field, make rotor continue to rotate in the same direction.Thus can pass through and mutual drive the mode of the coil circuit of two stators to produce high torsion when the slow-speed of revolution operate to export, and through the rotating speed control effects driving the mode of the coil circuit of arbitrary stator to produce the output of low torsion when high rotation speed operation.
According to above-mentioned technical characteristic, in this Brushless DC motor revolution speed control device, the periphery place be provided with in the rotor periphery place of this Brushless DC motor can arrange at least one hall sensing element, produces corresponding current signal for the permanet magnet position with this rotor changes.
According to above-mentioned technical characteristic, adopt series system electrical connection in this inverter circuit.
According to above-mentioned technical characteristic, its scope of gap in this adjacent boots portion is between 2mm to 5mm.
According to above-mentioned technical characteristic, be the electrical angle of this interval of those adjacent windings " 180 degree/m " in those stator tooths, m is the quantity of stator.
According to above-mentioned technical characteristic, be provided with at least one hall sensing element in the rotor periphery place of this Brushless DC motor and this microcontroller is electrically connected, detected the rotating speed of this rotor by this hall sensing element.
According to above-mentioned technical characteristic, at least two hall sensing elements are provided with and this microcontroller is electrically connected in the rotor periphery place of this Brushless DC motor, the rotating speed of this rotor is detected, the sequential exchanged by another hall sensing element detecting current by a wherein hall sensing element.
According to above-mentioned technical characteristic, at least three hall sensing elements are provided with and this microcontroller is electrically connected in the rotor periphery place of this Brushless DC motor, the rotating speed of this rotor is detected by a wherein hall sensing element, the sequential exchanged by another hall sensing element detecting current, and, by again one hall sensing element detect judge turning to of this rotor.
According to above-mentioned technical characteristic, the outside current signal passing speed control signal and this at least one hall sensing element is connected in this microcontroller, and according to the signal that received rotating speed control signal and hall sensing element transmit, control this gate drive circuit to drive the coil circuit of two stators alternately.
According to above-mentioned technical characteristic, the outside current signal passing speed control signal and this at least one hall sensing element is connected in this microcontroller, and according to the signal that received rotating speed control signal and hall sensing element transmit, drive the mode of the coil circuit of arbitrary stator, allow be energized stator and corresponding rotor form interaction electromagnetic field.
Described each stator is respectively equipped with eight stator tooths, and this rotor is provided with eight permanet magnets.
Described each stator is respectively equipped with even number stator tooth, and this rotor is provided with even number permanet magnet.
Described each stator is respectively equipped with even number stator tooth, and this rotor is provided with the even number permanet magnet of corresponding stator.
Described each stator is formed by the silicon steel sheet of plural identical configuration is stacked.
The boots portion that the axial length of described each permanet magnet contains these two stators arranges scope.
The beneficial effect that the utility model produces: specifically, Brushless DC motor revolution speed control device disclosed by the utility model, can pass through the mutual mode of the coil circuit of two stators that drives and produce the output of high torsion when the slow-speed of revolution operates, and through the rotating speed control effects driving the mode of the coil circuit of arbitrary stator to produce low torsion when high rotation speed operation to export, high-power power supply is not needed to operate by starter, and can switch to after motor running to the rotating speed of setting and change to drive the mode of the coil circuit of arbitrary stator to operate, not only can reduce the restriction that Brushless DC motor uses power supply, and also relatively electric energy is saved in the full-time operation process of Brushless DC motor.
Accompanying drawing explanation
Fig. 1 is Brushless DC motor revolution speed control device structure composed schematic diagram of the present utility model.
Fig. 2 is Brushless DC motor stereoscopic figure of the present utility model.
Fig. 3 is brushless direct-current motor structure exploded view of the present utility model.
Fig. 4 is brushless direct-current motor structure cutaway view of the present utility model.
Fig. 5 is Brushless DC motor of the present utility model when operating in the mode of the coil circuit driving two stators alternately, the magnetic interaction relation schematic diagram of its stator and rotor.
Fig. 6 is Brushless DC motor of the present utility model when operating in the mode of the coil circuit driving arbitrary stator, the magnetic interaction relation schematic diagram of its stator and rotor.
Figure number illustrates:
Q1 ~ Q8 electric crystal
11 hall sensing elements
12 inverter circuits
13 gate drive circuits
14 microcontrollers
20 Brushless DC motors
21 stators
211 bodies
212 stator tooths
213 boots portions
214 coils
22 rotors
221 rotating shafts
222 permanet magnets.
Embodiment
The utility model mainly provides one can produce high torsion when the slow-speed of revolution operates and exports, and the Brushless DC motor revolution speed control device of low torsion output is produced when high rotation speed operation, and then produce the output of high torsion when reaching slow-speed of revolution running, and the rotating speed control effects of low torsion output is produced when high rotation speed operation, the brushless motor control system that the change of large-scale velocity of rotation is corresponding can be carried out, shown in Brushless DC motor revolution speed control device structure composed schematic diagram as of the present utility model in Fig. 1, Brushless DC motor revolution speed control device of the present utility model, include: a Brushless DC motor 20, at least one hall sensing element 11, one inverter circuit 12, one gate drive circuit 13 and a microcontroller 14.
Please coordinate referring to figs. 1 through shown in Fig. 5 simultaneously, wherein, this Brushless DC motor 20, be provided with two stators 21, a rotor 22, these two stators 21 are along an identical axle center spread configuration, each stator 21 has one in circular body 211, the stator tooth 212 extended towards this body 211 center is provided with in this body 211, a boots portion 213 is formed in each stator tooth 212 tail end, the coil 214 of predetermined lock number is arranged with on each stator tooth 212, its scope of gap in the boots portion 213 that each stator 21 is adjacent is between 2mm to 5mm, described gap is less than 2mm then coiling difficulty, be greater than 5mm and easily produce useless magnetic force, and cost is higher, and the boots portion 213 of these two stators 21 is interlaced around being a circular hole configuration, this rotor 22 is located in the circular hole configuration of these two stators 21 relatively, and this rotor 22 is around being provided with plural permanet magnet 222 in a rotating shaft 221, and total permanet magnet 222 is to form the interconnected mode spread configuration in south/arctic in this rotating shaft periphery.
Wherein, those stator tooth 212 adjacent windings 214 are for being spaced the electrical angle of " 180 degree/m ", m is the quantity of stator 21, at this, the pass unambiguously of mechanical angle and electrical angle is determined by stator quantity, again, those stator tooth adjacent windings are for being spaced the electrical angle of " 180 degree/m ", and m is the quantity of stator.
Therefore, the one-period of electrical angle is not corresponding with the one-period of mechanical angle, for preferred embodiment of the present utility model, and two stators 21, the stator tooth 212 of those stators 21 is eight, and the one-period of its electrical angle is equivalent to 1/4 of the anglec of rotation of this rotor 22.Now, even electrical angle is the induced voltage in constant angle, the induced voltage gone out in the position probing that mechanical angle is different can also be become.If mechanical angle is different, then also can there is the mechanical structure based on stator 21 quantity and situation about changing in induced voltage.
The rotor 22 periphery place of this Brushless DC motor 20 is located at relatively by this at least one hall sensing element 11, produces corresponding current signal for permanet magnet 222 position with this rotor 22 changes; In the present embodiment, three hall sensing elements 11 be electrically connected with this microcontroller 14 are provided with in the rotor 22 periphery place of this Brushless DC motor 20, by the rotating speed of wherein this rotor of hall sensing element sensing, by the sequential of a wherein hall sensing element sensing exchanging electrical current, and a hall sensing element sensing judges turning to of this rotor.
This inverter circuit 12 is electrically connected between two stators 21 of this Brushless DC motor 20 and DC power supply, this inverter circuit 12 is made up of at least four power components, those power components connect with electrical equipment and are formed this inverter circuit 12, wherein the utility model preferred embodiment is eight power components, secondly, this inverter circuit 12 adopts series system to be electrically connected.As for, this gate drive circuit 13 forms this microcontroller 14 and is electrically connected with this inverter circuit 12, and connect the outside current signal passing speed control signal and this at least one hall sensing element 11 by this microcontroller 14, this power component also can be electric crystal; Wherein, as shown in the embodiment of Fig. 1 and Fig. 2, this inverter circuit 12 includes eight electric crystal Q1 ~ Q8, this electric crystal Q1 ~ Q4 connects the coil circuit of a wherein stator, this electric crystal Q5 ~ Q8 then connects the coil circuit of another stator, this gate drive circuit 13 connects this electric crystal Q1 ~ Q8 respectively, uses and controls this electric crystal Q1 ~ Q8 open circuit or open circuit.
And, according to received rotating speed control signal and hall sensing element 11 the signal of feedbacking to microcontroller 14, and then control this gate drive circuit 13 so that signal is passed to inverter circuit 12, this inverter circuit 12 opens a plurality of power component simultaneously, form south/arctic in the switching electromagnetic field switching corresponding power component to interlock, to start the mutual coil circuit driving two stators 21 simultaneously, that is this gate drive circuit 13 controls this electric crystal Q1 ~ Q8 open circuit or open circuit, and the coil circuit of two stators 21 is energized alternately.
Also or, according to received rotating speed control signal and hall sensing element 11 the signal of feedbacking to microcontroller 14, and then control this gate drive circuit 13 so that signal is passed to inverter circuit 12, this inverter circuit 12 only drives the power component of minority, in switching the power component of the arbitrary stator of impact, and then drive the mode of coil circuit of arbitrary stator 21, be energized stator 21 is allowed to form interaction electromagnetic field with corresponding rotor 22, that is this gate drive circuit 13 controls this electric crystal Q1 ~ Q8 open circuit or open circuit, and make the single-phase energising of coil circuit of arbitrary stator 21.
In principle, Brushless DC motor revolution speed control device of the present utility model, in time using, namely form two stators 21 through inverter circuit 12 to be electrically connected with DC power supply, and be engaged in microcontroller 14 with under the integrating operation of gate drive circuit 13, according to the signal that received rotating speed control signal and hall sensing element 11 transmit, to drive the coil circuit (as shown in Figure 5) of two stators 21 alternately, or drive the mode of coil circuit (as shown in Figure 6) of arbitrary stator 21, be energized stator 21 is allowed to form interaction electromagnetic field with rotor 22, rotor 22 is made to continue to rotate in the same direction.Certainly, utilize hall sensing element in above-described embodiment as transducer to detect the position of motor rotor, also utilize other transducer to detect the position of motor rotor.
That is, Brushless DC motor device disclosed by the utility model, do not need high-power power supply that applied Brushless DC motor can be made to start running from inactive state, and can switch to further after running to the rotating speed of setting and change to drive the mode of the coil circuit of arbitrary stator to operate, not only can reduce the restriction that Brushless DC motor uses power supply, and also relatively save electric energy in the full-time operation process of Brushless DC motor.
Moreover the Brushless DC motor 20 that the utility model is applied is in time implementing, and described each stator 21 can be formed by the silicon steel sheet of plural identical configuration is stacked respectively; In the present embodiment, each stator 21 is respectively equipped with eight stator tooths, this rotor 22 is provided with eight permanet magnets 222, and the boots portion 213 that the axial length of each permanet magnet 222 contains these two stators 21 arranges scope is good, to assume as a matter of course ear, this each stator 21 can be respectively equipped with even number stator tooth, this rotor 22 is provided with even number permanet magnet 222, as: eight corresponding four permanet magnets 222 of stator 21 tooth, also or, each stator 21 can be respectively equipped with even number stator tooth, and this rotor 22 is provided with the even number permanet magnet 222 of corresponding stator 21.
It is worth mentioning that, the Brushless DC motor that the utility model is applied, in time specifically implementing, the stator tooth quantity of each stator and the permanet magnet quantity of rotor, different quantity configuration designs can be had according to the size of reality, and under suitable drive circuit coordinates running, effectively control the coil commutation phase sequence of each stator, the running efficiency of overall Brushless DC motor can be improved easily or increase the excursion of rotating speed.
Tradition located by prior art is compared, Brushless DC motor revolution speed control device disclosed by the utility model, can pass through the mutual mode of the coil circuit of two stators that drives and produce the output of high torsion when the slow-speed of revolution operates, and through the rotating speed control effects driving the mode of the coil circuit of arbitrary stator to produce low torsion when high rotation speed operation to export, high-power power supply is not needed to operate by starter, and can switch to after motor running to the rotating speed of setting and change to drive the mode of the coil circuit of arbitrary stator to operate, not only can reduce the restriction that Brushless DC motor uses power supply, and also relatively electric energy is saved in the full-time operation process of Brushless DC motor, and then produce the output of high torsion when reaching slow-speed of revolution running, and the rotating speed control effects of low torsion output is produced when high rotation speed operation, the brushless motor control system that the change of large-scale velocity of rotation is corresponding can be carried out.
Claims (15)
1. a Brushless DC motor revolution speed control device, is characterized in that, at least comprises:
One Brushless DC motor, be provided with two stators, a rotor, these two stators are along an identical axle center spread configuration, each stator has one in circular body, the stator tooth extended towards this body central is provided with in this body, a boots portion is formed in each stator tooth tail end, the coil of predetermined lock number is arranged with on each stator tooth, and the boots portion of these two stators is interlaced around being a circular hole configuration, this rotor is located in the circular hole configuration of these two stators relatively, this rotor in a rotating shaft around being provided with plural permanet magnet, and total permanet magnet is to form the interconnected mode spread configuration in south/arctic in this rotating shaft periphery,
One inverter circuit, is electrically connected in two of this Brushless DC motor between stator and DC power supply; And
One gate drive circuit and a microcontroller, form this microcontroller by this gate drive circuit and this inverter circuit is electrically connected, and connects outside biography speed control signal by this microcontroller.
2. Brushless DC motor revolution speed control device as claimed in claim 1, it is characterized in that, this Brushless DC motor revolution speed control device, the periphery place be provided with in the rotor periphery place of this Brushless DC motor can arrange at least one hall sensing element, produces corresponding current signal for the permanet magnet position with this rotor changes.
3. Brushless DC motor revolution speed control device as claimed in claim 1, is characterized in that, this inverter circuit adopts series system electrical connection.
4. Brushless DC motor revolution speed control device as claimed in claim 1, it is characterized in that, its scope of gap in this adjacent boots portion is between 2mm to 5mm.
5. Brushless DC motor revolution speed control device as claimed in claim 1, it is characterized in that, those stator tooths are the electrical angle of this interval of those adjacent windings " 180 degree/m ", and m is the quantity of stator.
6. Brushless DC motor revolution speed control device as claimed in claim 2, it is characterized in that, this Brushless DC motor revolution speed control device, be provided with at least one hall sensing element in the rotor periphery place of this Brushless DC motor and this microcontroller is electrically connected, detected the rotating speed of this rotor by this hall sensing element.
7. Brushless DC motor revolution speed control device as claimed in claim 2, it is characterized in that, this Brushless DC motor revolution speed control device, at least two hall sensing elements are provided with and this microcontroller is electrically connected in the rotor periphery place of this Brushless DC motor, the rotating speed of this rotor is detected, the sequential exchanged by another hall sensing element detecting current by a wherein hall sensing element.
8. Brushless DC motor revolution speed control device as claimed in claim 2, it is characterized in that, this Brushless DC motor revolution speed control device, at least three hall sensing elements are provided with and this microcontroller is electrically connected in the rotor periphery place of this Brushless DC motor, the rotating speed of this rotor is detected by a wherein hall sensing element, by another hall sensing element detecting current exchange sequential, and, by again one hall sensing element detect judge turning to of this rotor.
9. Brushless DC motor revolution speed control device as claimed in claim 2, it is characterized in that, this microcontroller connects the outside current signal passing speed control signal and this at least one hall sensing element, and according to the signal that received rotating speed control signal and hall sensing element transmit, control this gate drive circuit to drive the coil circuit of two stators alternately.
10. Brushless DC motor revolution speed control device as claimed in claim 2, it is characterized in that, this microcontroller connects the outside current signal passing speed control signal and this at least one hall sensing element, and according to the signal that received rotating speed control signal and hall sensing element transmit, drive the mode of the coil circuit of arbitrary stator, allow be energized stator and corresponding rotor form interaction electromagnetic field.
11. as wherein arbitrary in claim 1 to 10 as described in Brushless DC motor revolution speed control device, it is characterized in that, each stator is respectively equipped with eight stator tooths, and this rotor is provided with eight permanet magnets.
12. as wherein arbitrary in claim 1 to 10 as described in Brushless DC motor revolution speed control device, it is characterized in that, each stator is respectively equipped with even number stator tooth, and this rotor is provided with even number permanet magnet.
13. as wherein arbitrary in claim 1 to 10 as described in Brushless DC motor revolution speed control device, it is characterized in that, each stator is respectively equipped with even number stator tooth, and this rotor is provided with the even number permanet magnet of corresponding stator.
14. as wherein arbitrary in claim 1 to 10 as described in Brushless DC motor revolution speed control device, it is characterized in that, each stator is formed by the silicon steel sheet of plural identical configuration is stacked respectively.
15. as wherein arbitrary in claim 1 to 10 as described in Brushless DC motor revolution speed control device, it is characterized in that, the boots portion that the axial length of each permanet magnet contains these two stators arranges scope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420568852.6U CN204179974U (en) | 2014-09-29 | 2014-09-29 | Brushless DC motor revolution speed control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420568852.6U CN204179974U (en) | 2014-09-29 | 2014-09-29 | Brushless DC motor revolution speed control device |
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| CN204179974U true CN204179974U (en) | 2015-02-25 |
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| CN201420568852.6U Expired - Fee Related CN204179974U (en) | 2014-09-29 | 2014-09-29 | Brushless DC motor revolution speed control device |
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| CN (1) | CN204179974U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471331A (en) * | 2014-09-29 | 2016-04-06 | 瑞展动能股份有限公司 | Brushless DC motor rotation speed control system |
-
2014
- 2014-09-29 CN CN201420568852.6U patent/CN204179974U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471331A (en) * | 2014-09-29 | 2016-04-06 | 瑞展动能股份有限公司 | Brushless DC motor rotation speed control system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |