CN103414303A - Two-in-one coaxial direct current brushless motor - Google Patents
Two-in-one coaxial direct current brushless motor Download PDFInfo
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- CN103414303A CN103414303A CN2013103228890A CN201310322889A CN103414303A CN 103414303 A CN103414303 A CN 103414303A CN 2013103228890 A CN2013103228890 A CN 2013103228890A CN 201310322889 A CN201310322889 A CN 201310322889A CN 103414303 A CN103414303 A CN 103414303A
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Abstract
The invention discloses a two-in-one coaxial direct current brushless motor. The two-in-one coaxial direct current brushless motor is an integrated motor formed by combining two direct current brushless motors which are basically identical in power in a coaxial mode, wherein the performance of the integrated motor is improved obviously. The two-in-one coaxial direct current brushless motor comprises a common rotating shaft, a first motor and a second motor. The first motor and the second motor are both direct current brushless motors. The first motor and the second motor are arranged on the common rotating shaft in a series connection mode. Through process control, when the two-in-one coaxial direct current brushless motor is started, the synthesized torque of the two-in-one coaxial direct current brushless motor is always greater than zero, and the minimum synthesized torque is the maximum torque of one of the motors. Therefore, the torque amplitude of the whole motor is effectively reduced, no dead angle exists during motor operation, the starting performance is better, vibrations caused by electromagnetic switching between the motors are reduced, and noise is lowered; meanwhile, under the condition that the outer diameters of the motors do not change basically, the motors are overlapped coaxially and then operate simultaneously to achieve the effect of outputting higher torque.
Description
Technical field
The present invention relates to the DC Brushless Motor art, refer in particular to a kind of with low cost, the high-effect motor that performance is more excellent, its be by public rotating shaft export the stack moment of torsion two-in-one coaxial direct current brushless motor.
Background technology
Existing DC Brushless Motor includes two kinds of external rotor DC Brushless Motor (as shown in Figure 1) and internal rotor DC Brushless Motor (as shown in Figure 2) usually, and they all include rotor combination, stator combination and connector; The rotor combination major part has permanent rotor magnet 6 (6 '), rotor rack 7 (7 ') and rotating shaft 8 etc., rotor rack 7 (7 ') is the major part of connection rotating shaft 8 and permanent rotor magnet 6 (6 '), by assembling rear rotor magnet 6 (6 '), fix with the position of rotating shaft 8, (Fig. 3 be existing common external rotor DC Brushless Motor when halted state, stator and rotor are at radially mutual alignment schematic diagram; And, Fig. 4 be existing common internal rotor DC Brushless Motor when halted state, stator and rotor are at radially mutual alignment schematic diagram.) rotor magnet 6 (6 ') and rotating shaft 8 synchronous rotaries while moving; Main wired group 1, drive circuit 2, the stator holder 3 etc. of holding of stator combination, line holds group 1 and includes stator core and line bag etc., and stator core is formed by stacking by silicon steel sheet, and silicon steel sheet is designed to profile of tooth, and line surrounds on the tooth of stator core; Connector mainly contains the axle upper periphery parts such as bearing 4, buckle, end cap 5, pad, spring, and they are connected rotor combination and location and installation with stator combination, and after installation, rotor combination can rotate freely; After power turn-on, by induction and the switching of drive circuit 2, the stator field checker, impel rotor magnet 6 (6 ') effectively to rotate and, by the rotating shaft output torque, form a complete DC Brushless Motor.
The stator number of teeth of conventional DC brushless motor is quantitatively identical with the rotor magnetic pole number, and all symmetrical along spindle central; When motor stops, stator polarity tooth is inhaled mutually with rotor magnet, make stator polarity tooth mid point and rotor field polarity mid point be in alignment phase, therefore, in the moment of motor starting, the active force that stator field and rotor field produce is radially reaching maximum, but is being circumferentially zero, the starting torque that is motor is zero, the motor starting difficulty; And the moment of the each switch polarity of stator during motor operation, the moment of torsion of motor output is all zero, so DC Brushless Motor stall in running has dead angle (annotate: direct current brush motor in running without Dead Core Problems); Simultaneously, due to the maximum torque of motor, be the peak swing value of moment of torsion, so the change in torque during motor operation is large, motor is easily shaken, and the operation noise is large.
The problem that can not start for DC Brushless Motor, existing way is, the electrode tooth of stator is designed to the asymmetric profile of both sides size, when motor is static like this, stator polarity tooth and rotor magnet suction mutually can make the polarity mid point of rotor and stator polarity tooth mid point depart from a phase bit, thereby guarantee that when energising started, the moment of torsion of motor was non-vanishing, reach the purpose of motor starting, the dependence that is in operation is used to power and is made motor energy continuous operation; By such design, although motor starting can start and operation, but the moment of torsion while starting is relatively very little, difficulty in starting when so load is larger, the zero moment of torsion of motor still exists, and the moment of torsion amplitude of motor does not improve, so during stall, dead angle still exists, motor is easily shaken, and the motor operation noise is large, and motor is only suitable for using in the not high occasion of little load quality requirements.
Difficulty in starting for above-mentioned DC Brushless Motor, the operation stall has the problem of dead angle and the large initiation motor shake of moment of torsion amplitude and noise, what employing was maximum at present is to solve with the three-phase motor circuit, but the circuit cost of this solution three characteristics of the middle term motor circuit is expensive, circuit is complicated and circuit space is relatively large, circuit needs the shortcomings such as plug-in in micro motor, and its application is restricted.
Summary of the invention
In view of this, the present invention is directed to the disappearance of prior art existence, its main purpose is to provide a kind of two-in-one coaxial direct current brushless motor, and it superposes mutually by the moment of torsion by two motors, makes its minimum synthetic moment of torsion be greater than zero always, and minimum synthetic moment of torsion is the peak torque of a motor wherein, greatly reduced the moment of torsion amplitude, motor operation is without dead angle, and startability is good, motor electromagnetism switching vibration reduces, and effectively reduces noise.
For achieving the above object, the present invention adopts following technical scheme:
A kind of two-in-one coaxial direct current brushless motor, include public rotating shaft, the first motor and the second motor, and this first motor and the series connection of the second motor are arranged in this public rotating shaft; When startup or operation, the moment moment of torsion of this first motor and the second motor generation misplaces, its synthetic moment of torsion is greater than zero always, when the first motor torsional moment was zero, it is maximum that the second motor torsional moment reaches, when the first motor torsional moment is maximum, the second motor torsional moment is zero, being its minimum synthetic moment of torsion is the peak torque of a motor wherein, and in the motor operation process, without dead angle, the motor starting performance is good.
As a kind of preferred version, described the first motor includes the first stator and the first rotor matched, and aforementioned the second motor includes the second stator and the second rotor matched; Wherein, this first stator and the second stator all with aforementioned public rotating shaft arranged concentric, and, this first rotor and the second rotor all be completely fixed in public rotating shaft and with public rotating shaft synchronous rotary; The polarity of the magnetic field mid point of this first rotor and the first stator polarity tooth mid point misplace at the relative phase of radially projecting with respect to bitrochanteric polarity of the magnetic field mid point and the second stator polarity tooth mid point at the relative phase of radially projecting, and the dislocation angle equals the 180 °/stator number of teeth.
As a kind of preferred version, described the first stator includes the first stator holder, First Line holds group and the first drive circuit, and this First Line holds group and the first drive circuit is fixed on the first stator holder; Described the second stator includes the second stator holder and the second line holds group and the second drive circuit, and this second line holds group and the second drive circuit is fixed on the second stator holder; Described the first rotor includes the first rotor frame and the first rotor magnet, and this first rotor magnet is fixed in the first rotor frame; Described the second rotor includes the second rotor rack and the second rotor magnet, and this second rotor magnet is fixed in the second rotor rack; This first rotor frame and the second rotor rack are fixed in public rotating shaft simultaneously; Between this first stator holder and the second stator holder, be connected with an adapter sleeve and fix by this adapter sleeve, bearing all is installed be used to supporting public rotating shaft on this first stator holder and the second stator holder, this public rotating shaft and the first rotor and the rotation of the second rotor synchronous.
As a kind of preferred version, described the first stator holder and two stator holders of the second stator holder for separating; And, described the first rotor frame and the second rotor rack and public rotating shaft design for integral type, this the first rotor frame and the second rotor rack all are the structure that cross section is the U font, the U-shaped opening direction is opposite, and aforementioned the first rotor magnet and the second rotor magnet are individually fixed in the vestibule of the first rotor frame and the second rotor rack.
As a kind of preferred version, described the first motor and the second motor are all the external rotor DC Brushless Motor, and its two-in-one coaxial direct current brushless motor is two-in-one coaxial external rotor DC Brushless Motor; And, when aforementioned adapter sleeve is cylindrical shape, this first stator holder, the second stator holder and adapter sleeve enclose and form a closed containing cavity, the first motor and the second motor are positioned at this closed containing cavity fully, during motor operations, rotor is no longer outside exposed, so this two-in-one coaxial external rotor DC Brushless Motor is transformed into " internal rotor " motor.
As a kind of preferred version, described the first stator includes the first stator holder, First Line holds group and the first drive circuit, and this First Line holds group and the first drive circuit is fixed on the first stator holder; Described the second stator includes the second stator holder and the second line holds group and the second drive circuit, and this second line holds group and the second drive circuit is fixed on the second stator holder; Described the first rotor includes the first rotor frame and the first rotor magnet, and this first rotor magnet is fixed in the first rotor frame; Described the second rotor includes the second rotor rack and the second rotor magnet, and this second rotor magnet is fixed in the second rotor rack; This first rotor frame is fixed in public rotating shaft, bearing all is installed be used to supporting public rotating shaft on this first stator holder and the second stator holder, and after public rotating shaft was installed and located, this second rotor rack was fixed in public rotating shaft by tool again; This public rotating shaft and the first rotor and the rotation of the second rotor synchronous.
As a kind of preferred version, described the first stator holder and the second stator holder are designed to the shared stator holder of integral type; Aforementioned the first rotor magnet and the second rotor magnet are individually fixed in the vestibule of the first rotor frame and the second rotor rack, and, this the first rotor frame separates before installation with the second rotor rack, and the first rotor frame and public rotating shaft are designed to one or the second rotor rack and public rotating shaft and are designed to one.
As a kind of preferred version, described the first motor and the second motor are all the external rotor DC Brushless Motor, and its two-in-one coaxial direct current brushless motor is two-in-one coaxial external rotor DC Brushless Motor; And, when this shared stator holder becomes inner circle shape containing cavity along the first rotor frame and the second rotor rack periphery design, the first rotor and bitrochanteric periphery are encased, thereby make this two-in-one coaxial external rotor DC Brushless Motor become the safer semi-enclosed external-rotor motor of operation.
As a kind of preferred version, described the first motor and the second motor are all the external rotor DC Brushless Motor, and its two-in-one coaxial direct current brushless motor is two-in-one coaxial external rotor DC Brushless Motor; And, when this shared stator holder becomes inner circle shape containing cavity along the first rotor frame and the second rotor rack periphery design, the first rotor and bitrochanteric periphery are encased, when further at the two ends of aforementioned shared stator holder, adding upper end cover or guard and surrounding the first motor and the second motor fully, this two-in-one coaxial external rotor DC Brushless Motor is transformed into " internal rotor " motor.
As a kind of preferred version, described the first stator includes shared stator holder, First Line holds group and the first drive circuit, and this First Line holds group and the first drive circuit is fixed in the vestibule that shares stator holder one end; Described the second stator includes shared stator holder, the second line holds group and the second drive circuit, and this second line holds group and the second drive circuit is fixed in the vestibule that shares the stator holder other end; Described the first rotor includes the first rotor frame and the first rotor magnet, and this first rotor magnet is annular, and its fixed cover is in the first rotor frame outside; Described the second rotor includes the second rotor rack and the second rotor magnet, and this second rotor magnet is annular, and its fixed cover is in the second rotor rack outside; The integral type that is designed to this first rotor and the second rotor rack is fixed in public rotating shaft; Should share the stator holder two ends end cap was installed, bearing was installed be used to supporting public rotating shaft in end cap, this public rotating shaft and the first rotor and the rotation of the second rotor synchronous.
After the present invention adopted technique scheme, its beneficial effect was:
One, effective control by processing procedure, by after two coaxial stacks of DC Brushless Motor, while making this two-in-one coaxial direct current brushless motor start, the moment moment of torsion of this first motor and the second motor generation misplaces, its synthetic moment of torsion is greater than zero always, when the first motor torsional moment is zero, it is maximum that the second motor torsional moment reaches, when the first motor torsional moment is maximum, the second motor torsional moment is zero, being its minimum synthetic moment of torsion is the peak torque of a motor wherein, effectively reduced the moment of torsion amplitude of whole motor, motor operation is without dead angle, startability is better, the vibration that the switching of motor electromagnetism causes reduces, noise reduces, simultaneously, the motor outside dimension is substantially constant in the situation that guarantee, by after the coaxial stack of motor, two motors are worked simultaneously, reach and export the more effect of high pulling torque.
Two, in outer-rotor type two-in-one coaxial motor, by aforementioned the first stator holder and the second stator holder are arranged dorsad, or aforementioned the first rotor frame and the second rotor rack are arranged dorsad, on the one hand, make overall structure more compact, and simple in structure, be easy to processing and fabricating, easy to assembly; On the other hand, the external rotor of this motor part is effectively hidden, thereby become safer " false internal rotor " motor;
Three, in inner-rotor type two-in-one coaxial motor, compare in conventional art two groups of coaxial being series at together of common motor, the present invention's coaxial motor only needs two bearings and two bearing caps, it has reduced two bearings and two bearing caps, so, on the one hand, simplify part and assembling process, reduced production cost; On the other hand, its overall structure is more compact, is conducive to the integral arrangement of equipment, has saved space;
Four, aforementioned the first motor and the second motor are all DC Brushless Motor, and its high life makes motor without maintenance cost, and this motor has the advantages that efficiency is high, manufacturing cost is low, are conducive to marketing and use.
For more clearly setting forth architectural feature of the present invention and effect, the present invention is described in detail below in conjunction with accompanying drawing and specific embodiment.
The accompanying drawing explanation
Fig. 1 is existing common external rotor DC Brushless Motor schematic diagram;
Fig. 2 is existing common internal rotor DC Brushless Motor schematic diagram:
Fig. 3 be existing common external rotor DC Brushless Motor when halted state, stator polarity tooth and rotor magnet are at radially mutual alignment schematic diagram:
Fig. 4 be existing common internal rotor DC Brushless Motor when halted state, stator polarity tooth and rotor magnet are at radially mutual alignment schematic diagram:
Fig. 5 is the structural representation of the first embodiment of the present invention;
Fig. 6 is the partial structurtes schematic diagram of the first embodiment of the present invention;
Fig. 7 is the structural representation of the second embodiment of the present invention;
Fig. 8 is the partial structurtes schematic diagram of the second embodiment of the present invention;
Fig. 9 is the decomposing schematic representation of Fig. 8;
Figure 10 a is the stator polarity tooth of the first of the present invention or the second embodiment the first motor and rotor magnet at radially mutual alignment schematic diagram;
Figure 10 b is the stator polarity tooth of the first of the present invention or the second embodiment the second motor and rotor magnet at radially mutual alignment schematic diagram;
Figure 11 is moment of torsion and the phase place schematic diagram of the first motor operation one week output;
Figure 12 is moment of torsion and the phase place schematic diagram of the second motor operation one week output;
Figure 13 is synthetic moment of torsion and the phase place schematic diagram of the first motor and the second motor operation one week output;
Figure 14 is the structural representation of the third embodiment of the present invention;
Figure 15 a is the present invention's the stator polarity tooth of the third embodiment the first motor and rotor magnet at radially mutual the schematic diagram of putting:
Figure 15 b is the present invention's the stator polarity tooth of the third embodiment the second motor and rotor magnet at radially mutual the schematic diagram of putting.
The accompanying drawing identifier declaration:
1, line holds group 2, drive circuit
3, stator holder 4, bearing
5, end cap 6, permanent rotor magnet
6 ', permanent rotor magnet 7, rotor rack
7 ', rotor rack 8, rotating shaft
10, public rotating shaft 21, the first stator holder
22, First Line holds group 23, the first rotor frame
24, the first rotor magnet 25, the first drive circuit
31, the second stator holder 32, the second line hold group
33, the second rotor rack 34, the second rotor magnet
35, the second drive circuit 40, riveted cover
50, adapter sleeve 60, buckle
70, spring 80a, bearing
90, housing 22 ', First Line hold group
The 23 ', first internal rotor frame 24 ', the first inner rotor magnets
The 25 ', first drive circuit 32 ', the second line hold group
The 33 ', second internal rotor frame 34 ', the second inner rotor magnets
The 35 ', second drive circuit 80b, bearing cap.
Embodiment
Refer to Fig. 5 to shown in Figure 15, it has demonstrated the concrete structure of the present invention's preferred embodiment, include public rotating shaft 10, the first coaxial motor and the second motor (seeing Fig. 5 or Fig. 7 or Figure 14), this first motor and the second motor are all the external rotor DC Brushless Motor or are all the internal rotor DC Brushless Motor, the first motor is identical with the torque direction of the second motor output, and the polarity of the magnetic field mid point of this first rotor and the first stator polarity tooth mid point misplace at the relative phase of radially projecting with respect to bitrochanteric polarity of the magnetic field mid point and the second stator polarity tooth mid point at the relative phase of radially projecting, the dislocation angle equals the 180 °/stator number of teeth (see shown in Figure 10 a and Figure 10 b or shown in Figure 15 a and Figure 15 b),
As shown in Figure 5 and Figure 6, it is the concrete structure of the first embodiment of the present invention, this first motor and the second motor are all the external rotor DC Brushless Motor, include public rotating shaft 10, the first stator matched and the first external rotor (i.e. the main member of the first motor), and the second stator matched and the second external rotor (i.e. the main member of the second motor), wherein, in the middle of this first stator holder 21 and the second stator holder 31, all be installed as bearing 80a, for supporting public rotating shaft 10 and guaranteeing the first stator and the second stator and the first rotor and the second rotor arranged concentric, and by adapter sleeve 50, that the first stator holder 21 and the second stator holder 31 is fixing, and, this the first rotor and the second rotor all be completely fixed in public rotating shaft 10 with public rotating shaft 10 synchronous rotaries, the polarity of the magnetic field mid point of this first external rotor and the first stator polarity tooth mid point misplace at the relative phase of radially projecting at the relative phase of radially projecting polarity of the magnetic field mid point and the second stator polarity tooth mid point with respect to the second external rotor, the dislocation angle equals the 180 °/stator number of teeth (as shown in Figure 10 a and Figure 10 b), in the present embodiment, its stator number of teeth is 4, the dislocation angle equals 45 °, namely the position of this first stator polarity tooth mid point and the second stator polarity tooth mid point is identical, the polarity of the magnetic field mid point of the first rotor and the position shape dislocation at 45 ° of bitrochanteric polarity of the magnetic field mid point, certainly, can be also that the position of the polarity of the magnetic field mid point of aforementioned the first rotor and bitrochanteric polarity of the magnetic field mid point is identical, position the first stator polarity tooth mid point and the second stator polarity tooth mid point forms dislocation, or the formation dislocation of the position of aforementioned the first stator polarity tooth mid point and the second stator polarity tooth mid point, and the formation dislocation of the position of the polarity of the magnetic field mid point of the first rotor and bitrochanteric polarity of the magnetic field mid point, at this, with the present embodiment, be not limited, the two-in-one coaxial direct current brushless motor of above-mentioned three kinds of structures, when it starts, the moment moment of torsion of the first motor and the second motor generation misplaces, synthetic moment of torsion is greater than zero always, and minimum synthetic moment of torsion is the peak torque of a motor wherein, like this, in the two-in-one coaxial direct current brushless motor running without dead angle, the starting torque of motor is large, and startability is good.
Particularly, this first stator includes the first stator holder 21, First Line and holds group the 22 and first drive circuit 25, and this first drive circuit 25 is pressed close to the first stator holder end and First Line and held and organize 22 and jointly be fixed on the middle pipe of the first stator holder 21; This second stator includes the second stator holder 31, the second line and holds group the 32 and second drive circuit 35, and this first drive circuit 25 is pressed close to the first stator holder end and First Line and held and organize 22 and jointly be fixed on the middle pipe of the first stator holder 21; This first rotor includes the first rotor frame 23 and the first rotor magnet 24, this second rotor includes the second rotor rack 33 and the second rotor magnet 34, in this embodiment, this the first rotor frame 23 and the second rotor rack 33 are all iron-clad, and this first rotor magnet 24 and the second rotor magnet 34 are all the annular permanent-magnet body; Wherein, this first drive circuit 25 is fixed on this First Line and holds group 22 1 sides, this second drive circuit 35 is fixed on this second line and holds group 32 1 sides, this first stator holder 21 and the second stator holder 31 all are the structure that cross section is the mountain font, and end, sidewall and middle pipe have been included, between this sidewall and middle pipe, be formed with the first containing cavity, aforementioned First Line holds group the 22, first drive circuit 25 and the second line and holds group the 32, second drive circuit 35 and be correspondingly positioned at respectively in the first containing cavity of the first stator holder 21 and the second stator holder 31; And, this the first rotor frame 23 and the second rotor rack 33 all are the structure that cross section is the U font, included bottom and sidewall, aforementioned the first rotor magnet 24 and the second rotor magnet 34 are respectively in the corresponding inside sidewalls vestibule that is fixed in the first rotor frame 23 and the second rotor rack 33.
In the present embodiment, this first stator holder 21 and the second stator holder 31 are to arrange in opposite directions, this first stator holder 21 and two stator holders of the second stator holder 31 for separating; In this first stator holder 21 and the second stator holder 31, be respectively arranged with stepped hole in order to bearing 80a to be installed, have buckle slot at the public rotating shaft end of the first rotor; During installation, at the public rotating shaft end of the first rotor, load onto buckle 60, in the public rotating shaft of the second rotor, load onto spring 70, in pipe step and the second stator holder 31, pipe step place respectively is mounted with bearing 80a be used to supporting public rotating shaft 10 in the first stator holder 21, bearing 80a in the first stator holder 21 is buckle 60 location in pipe step and the public rotating shaft of the first rotor in the first stator holder, and the bearing 80a in the second stator holder 31 is spring 70 location in pipe step and the public rotating shaft of the second rotor in the second stator holder; And the sidewall of this first stator holder 21 and the second stator holder 31 is connected and fixed by adapter sleeve 50, thus, the first stator holder 21 and the second stator holder 31 enclose and form the second containing cavity, and aforementioned the first rotor frame 23 and the second rotor rack 33 are positioned at this second containing cavity; (when aforementioned adapter sleeve 50 is cylindrical shape, this first stator holder 21, the second stator holder 31 and connect magnanimous 50 and enclose and form a closed containing cavity.) and, this first rotor frame 23 and the second rotor rack 33 are attaching type setting dorsad, namely aforementioned U-shaped opening direction is opposite, this the first rotor frame 23 and the second rotor rack 33 are fixed in aforementioned public rotating shaft 10 jointly, this the first rotor frame 23, the second rotor rack 33 and public rotating shaft 10 are equivalent to the integral type design, and the sidewall of this first rotor frame 23 holds between group 22 at sidewall and the First Line of the first stator holder 21, the sidewall of this second rotor rack 33 holds between group 32 at sidewall and second line of the second stator holder 31, so, the rotor portion of this motor all is enclosed in closed containing cavity, motor rotor has obtained effectively hiding, thereby become safer " internal rotor " motor, and this first rotor frame 23 and the second rotor rack 33 are connected on a riveted cover 40 jointly, and this riveted cover 40 is connected in aforementioned public rotating shaft 10.
As shown in Figure 7 to 9, it is the concrete structure of the second embodiment of the present invention, its structure and principle and aforementioned the first embodiment are roughly the same, its difference is: this first stator holder 21 and the second stator holder 31 are to arrange dorsad, its both ends attaching type connects and is positioned at centre position, this first stator holder 21 and the second stator holder 31 openings are respectively towards two ends, in the present embodiment, this first stator holder 21 and the second stator holder 31 are the one-body molded stator holder that shares, include sidewall, be arranged in the pipe in centre position and manage the end face in centre position perpendicular to this, these end face both sides are formed with respectively aforementioned the first containing cavity, and, aforementioned the first rotor frame 23 and the second rotor rack 33 are to arrange in opposite directions, its opening is all towards the aforementioned end face that is positioned at centre position, and the sidewall of this first rotor frame 23 holds between group 22 at sidewall and the First Line of the first stator holder 21, the sidewall of this second rotor rack 33 holds between group 32 at sidewall and second line of the second stator holder 31, so, the external rotor of this motor part is effectively hidden, thereby become safer " internal rotor " motor, and the bottom of this first rotor frame 23 and the second rotor rack 33 is connected on different riveted covers 40, and this two riveteds cover 40 is connected and fixed in aforementioned public rotating shaft 10, this the first rotor frame 23 separates before installation with the second rotor rack 33, and this first rotor frame 23 is designed to one with public rotating shaft 10 or the second rotor rack 33 is designed to one with public rotating shaft 10, during assembling, after first public rotating shaft 10 being installed and having located, then the first rotor or the second rotor were adopted before the motor overall package completes be pressed into, the mode such as cementing, locking and public rotating shaft be connected and fixed (can complete by tool in this processing procedure), when aforementioned shared stator holder becomes inner circle shape containing cavity along the first rotor frame and the second rotor rack periphery design, the first rotor and bitrochanteric periphery are encased, thereby make this two-in-one coaxial external rotor DC Brushless Motor become safer " semiclosed rotor " motor of operation, and when at the two ends of " semiclosed motor ", adding upper end cover or guard and surrounding the first motor and the second motor fully, this two-in-one coaxial external rotor DC Brushless Motor can be transformed into " internal rotor " motor.
As can be known by above-mentioned the first embodiment and the second embodiment, this first motor is that a pair of specification is similar, the external rotor DC Brushless Motor of switched in opposite to the second motor, the first motor and the second motor are generally the incomplete motor of structure, they need to share bearing 80 parts such as grade, the most important thing is that they need to share a public rotating shaft 10, form the two-in-one coaxial external-rotor DC brushless motor, in anabolic process, the relative position in the stator polarity tooth of two motors and the magnetic field of rotor magnet is shown in shown in Figure 10 a and Figure 10 b, makes two motors switch on while moving, and 0 of the moment of torsion of the first motor and the second motor staggers and forms complementary, such the first motor output torque distributes and sees Figure 11, and the second motor output torque distributes and sees Figure 12, and the synthetic moment of torsion of two-in-one coaxial direct current brushless motor distributes and sees Figure 13, the output torque of common single-motor distributes also as shown in figure 11, by contrast Figure 11 and Figure 13, can find out, the moment of torsion amplitude ratio average torque of common motor is also large, the moment of torsion amplitude ratio is greater than 1, and in the synthetic moment of torsion of two-in-one coaxial direct current brushless motor: its minimum synthetic moment of torsion is the max. output torque of one of them motor, average synthetic moment of torsion is the average output torque sum of two motors, amplitude is far smaller than average torque, the moment of torsion amplitude ratio is very little, minimal torque is near average torque, therefore, the two-in-one coaxial direct current brushless motor operation is without dead angle, start without difficulty, motor electromagnetism switching vibration reduces, noise reduces.(annotate: this moment of torsion amplitude refers to motor maximum output torque and minimal torque poor in normal course of operation, and this moment of torsion amplitude ratio refers to the ratio of the mean value of torque of the moment of torsion amplitude of motor and motor.)
As shown in figure 14, it is the concrete structure of the third embodiment of the present invention, different from above-mentioned two kinds of embodiment is, this first motor and the second motor are all the internal rotor DC Brushless Motor, in this embodiment, include First Line and hold group 22 ', the first drive circuit 25 ', the first inner rotor magnets 24 ', the first internal rotor frame 23 ', the second line holds group 32 ', the second drive circuit 35 ', the second inner rotor magnets 34 ', the second internal rotor frame 33 ', two bearings 80a, two end cap (bearing cap) 80b, housing 90 and public rotating shaft 10, wherein, this first inner rotor magnets 24 ' and the second inner rotor magnets 34 ' are the annular alnico magnets, these housing 90 two ends are equipped with end cap 80b, bearing are installed be used to supporting public rotating shaft 10 in this end cap 80b, and end cap 80b must guarantee that public rotating shaft 10 is concentric with each diameter of stator bore while installing, between this housing 90 and two bearings lid 80b, be formed with the 3rd accommodation space, this first inner rotor magnets 24 ' is enclosed within the first internal rotor frame 23 ' and above with public rotating shaft 10, is connected to form the first rotor, this second inner rotor magnets 34 ' is enclosed within the second internal rotor frame 33 ' and above with public rotating shaft 10, is connected to form the second rotor, this the first rotor and the second rotor and synchronous rotary, and, aforementioned First Line hold group the 22 ' and second line hold organize 32 ' respectively correspondence be arranged at the periphery of the first inner rotor magnets 24 ' and the second inner rotor magnets 34 ', this first drive circuit 25 ' is fixedly connected on the side that First Line holds group 22 ', this second drive circuit 35 ' is fixedly connected on the side that the second line holds group 32 ', and this First Line holds group 22 ', the first drive circuit 25 ' and the second line hold group 32 ', the second drive circuit 35 ' is connected to (annotate: this housing 90 is equivalent to aforementioned First Line and holds the shared stator holder that group the 22 ' and second line holds group 32 ') on the vestibule inwall at aforementioned housing 90 two ends.
In this kind inner-rotor type two-in-one coaxial motor, compare in conventional art two groups of coaxial being series at together of common motor, the present invention's coaxial motor only needs two bearings and two bearing caps, it has reduced two bearings and two bearing caps, so, on the one hand, simplify part and assembling process, reduced production cost; On the other hand, its overall structure is more compact, is conducive to the integral arrangement of equipment, has saved space.And, in anabolic process, the relative position in the stator polarity tooth of two motors and the magnetic field of rotor magnet is shown in shown in Figure 15 a and Figure 15 b, with above-mentioned two kinds of embodiment, the polarity of the magnetic field mid point of this first internal rotor and the first stator poles shape tooth mid point misplace at the relative phase of radially projecting at the relative phase of radially projecting polarity of the magnetic field mid point and the second stator polarity tooth mid point with respect to the second internal rotor, the dislocation angle equals the 180 °/stator number of teeth (as shown in Figure 15 a and Figure 15 b), in the present embodiment, its stator number of teeth is 4, and the dislocation angle equals 45 °; Be specifically that aforementioned First Line holds group the 22 ' and second line and holds that to organize 32 ' position identical, and aforementioned the first inner rotor magnets 24 ' and the second inner rotor magnets 34 ' be the 45° angle degree and shift to install, to reach the output torque inferred-zero, to increase peak torque and the little effect of amplitude.
Design focal point of the present invention is, mainly tie up in the situation that assurance motor radial dimension is identical, by by two coaxial stacks of motor, thereby increase the height of motor, two motors are worked simultaneously, reach the effect that increases by one times of output torque, simultaneously, effective control by processing procedure, while making this two-in-one coaxial direct current brushless motor start, the moment moment of torsion of the first motor and the second motor generation misplaces, synthetic moment of torsion is greater than zero always, and minimum synthetic moment of torsion is the peak torque of a motor wherein, effectively reduced the moment of torsion amplitude of whole motor, motor operation is without dead angle, startability is good, motor electromagnetism switching vibration reduces, noise reduces, secondly, product overall structure of the present invention is very compact, simple in structure, be easy to processing and fabricating, easy to assembly, like this, effectively reduces production cost, and it has good service behaviour, is conducive to marketing and use.
The above, it is only preferred embodiment of the present invention, not technical scope of the present invention is imposed any restrictions, therefore every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any trickle modification, equivalent variations and modification that above embodiment does.
Claims (1)
1. a two-in-one coaxial direct current brushless motor, include public rotating shaft, the first motor and the second motor, and this first motor and the series connection of the second motor are arranged in this public rotating shaft, described the first motor includes the first stator and the first rotor matched, and aforementioned the second motor includes the second stator and the second rotor matched, wherein, this first stator and the second stator all with aforementioned public rotating shaft arranged concentric, and, this first rotor and the second rotor all be completely fixed in public rotating shaft and with public rotating shaft synchronous rotary, described the first motor and the second motor are the conventional DC brushless motor with zero moment of torsion defect, the polarity of the magnetic field mid point of this first rotor and the first stator polarity tooth mid point misplace at the relative phase of radially projecting with respect to bitrochanteric polarity of the magnetic field mid point and the second stator polarity tooth mid point at the relative phase of radially projecting, the dislocation angle equals the 180 °/stator number of teeth, when startup or operation, the moment moment of torsion of this first motor and the second motor generation misplaces, its synthetic moment of torsion is greater than zero always, when the first motor torsional moment is zero, it is maximum that the second motor torsional moment reaches, when the first motor torsional moment is maximum, the second motor torsional moment is zero, and minimum synthetic moment of torsion is the peak torque of a motor wherein, in the motor operation process without dead angle, described the first stator includes the first stator holder, First Line holds group and the first drive circuit, and described the second stator includes the second stator holder and the second line holds group and the second drive circuit, described the first rotor includes the first rotor frame and the first rotor magnet, and described the second rotor includes the second rotor rack and the second rotor magnet, it is characterized in that:
This first stator holder and the second stator holder all are the structure that cross section is the mountain font, and end, sidewall and middle pipe have been included, this first stator holder and the second stator holder be opening respectively towards the setting dorsad at two ends, and the first stator holder and the second stator holder are the one-body molded shared stator holder that is connected in centre position of both ends attaching type; Aforementioned First Line holds outside the middle pipe that group is installed in the first stator holder, and the second line holds outside the middle pipe that group is installed in the second stator holder; In the middle pipe of this first stator holder and the second stator holder, be respectively arranged with stepped hole in order to bearing to be installed, have buckle slot at the public rotating shaft end of the first rotor; During installation, load onto buckle at the public rotating shaft end of the first rotor, load onto spring in the public rotating shaft of the second rotor; In pipe step and the second stator holder, pipe step place respectively is mounted with bearing be used to supporting public rotating shaft in the first stator holder, bearing in the first stator holder is the snaps into position in pipe step and the public rotating shaft of the first rotor in the first stator holder, and the bearing in the second stator holder is the spring location in pipe step and the public rotating shaft of the second rotor in the second stator holder;
This first rotor frame and the second rotor rack all are the structure that cross section is the U font, have included bottom and sidewall, and this first rotor frame and the second rotor rack are that opening is all towards the setting in opposite directions in aforementioned centre position;
And the sidewall of this first rotor frame holds between group at sidewall and the First Line of aforementioned the first stator holder, the sidewall of this second rotor rack holds between group at sidewall and second line of aforementioned the second stator holder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103228890A CN103414303A (en) | 2011-03-10 | 2011-03-10 | Two-in-one coaxial direct current brushless motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103228890A CN103414303A (en) | 2011-03-10 | 2011-03-10 | Two-in-one coaxial direct current brushless motor |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110057534 Division CN102148551B (en) | 2011-03-10 | 2011-03-10 | Two-in-one coaxial direct current brushless motor |
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| CN2013103228890A Pending CN103414303A (en) | 2011-03-10 | 2011-03-10 | Two-in-one coaxial direct current brushless motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105934870A (en) * | 2014-02-26 | 2016-09-07 | 三菱电机株式会社 | Dynamo-electric machine |
| CN109751262A (en) * | 2017-11-08 | 2019-05-14 | 建准电机工业股份有限公司 | Coaxial double ceiling fans |
-
2011
- 2011-03-10 CN CN2013103228890A patent/CN103414303A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105934870A (en) * | 2014-02-26 | 2016-09-07 | 三菱电机株式会社 | Dynamo-electric machine |
| CN105934870B (en) * | 2014-02-26 | 2018-09-07 | 三菱电机株式会社 | Electric rotating machine |
| CN109751262A (en) * | 2017-11-08 | 2019-05-14 | 建准电机工业股份有限公司 | Coaxial double ceiling fans |
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Address after: 523003 Guangdong province Dongguan City Huangjiang Town villa building 8 902 pinnacle in baohu Lake Applicant after: Zeng Zhaohong Address before: 523003 Guangdong province Dongguan City Huangjiang Town villa building 8 902 pinnacle in baohu Lake Applicant before: Zeng Shaohong |
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Application publication date: 20131127 |