CN203119732U - Single-phase brushless DC motor - Google Patents
Single-phase brushless DC motor Download PDFInfo
- Publication number
- CN203119732U CN203119732U CN 201320088888 CN201320088888U CN203119732U CN 203119732 U CN203119732 U CN 203119732U CN 201320088888 CN201320088888 CN 201320088888 CN 201320088888 U CN201320088888 U CN 201320088888U CN 203119732 U CN203119732 U CN 203119732U
- Authority
- CN
- China
- Prior art keywords
- direct current
- stator core
- stator
- single phase
- phase direct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The utility model provides a single-phase brushless DC motor, which comprises a stator and a rotor positioned inside the stator. The stator comprises a stator core and a coil wound onto the stator core. The stator core is provided with a yoke and a plurality of teeth extending from the yoke to the central direction of the stator core. The central part of the stator core is provided with an inner circular hole. The inner edge of each tooth is provided with a first arc and a second arc. The distance between the circle centers of the first arc and the inner circular hole is smaller than the distance between the circle centers of the second arc and the inner circular hole. The single-phase brushless DC motor also comprises a control circuit used for powering the coil. The control circuit is composed of a single-chip microcomputer and four power tubes, wherein the four power tubes are in bridging connection with each other and are used for receiving the output signals of the single-chip microcomputer. The above single-phase brushless DC motor is relatively low in production cost. Due to the arrangement of an eccentric air gap, the single-phase brushless DC motor is relatively large in starting torque, so that the starting of the motor is facilitated.
Description
Technical field
The utility model relates to machine field, especially relates to a kind of brushless single phase direct current machine for fan.
Background technology
Motor is widely used in the various electric equipments of industrial production and life, and prior motor can be divided into direct current machine and alternating current machine, and wherein brshless DC motor is widely used in such as on the electric equipments such as electric fan.
Existing brshless DC motor has stator and rotor, and stator comprises stator core and be wrapped in coil on the stator core, and the middle part of stator core offers the rotor installing hole, and rotor is installed in the rotor installing hole.Rotor has rotor body, and rotor body has rotor core and the permanent magnet of injection mo(u)lding on rotor core usually, and armature spindle is installed in the rotor body and with the rotation of rotor and rotates, and outputting power thus.
Number of phases branch according to the brushless DC motor stator coil, existing brshless DC motor is divided into brushless single phase direct current machine and three-phase brushless dc motor, and in the three-phase brushless dc motor, the coil that is wrapped on the stator core is three-phase, it is reliable, noise is low, efficient up to, reach usually 70% or more than.But the production cost of three-phase brushless dc motor is higher, influences the use of three-phase brushless dc motor.
The production cost of brushless single phase direct current machine is low, but has many inherent shortcomings, and is less as starting torque, and there is the dead point in the running, and noise height, operational efficiency are low, usually 55% or below, cause the single-phase DC motor to be difficult to be applied in the lower powered electric equipment.
Summary of the invention
Main purpose of the present utility model provides the brushless single phase direct current machine that a kind of production cost is low and detent torque is bigger.
For realizing main purpose of the present utility model, the rotor that the brushless single phase direct current machine that the utility model provides has stator and is positioned at stator, stator has stator core and is wrapped in coil on the stator core, a plurality of teeth that stator core has yoke portion and extends to the stator core center position from yoke portion, and the middle part of stator core is provided with interior circular hole, wherein, have first circular arc and second circular arc on the inward flange of each tooth, distance between the center of circle of first circular arc and interior circular hole is less than the distance between the center of circle of second circular arc and interior circular hole, and the brushless single phase direct current machine also is provided with the control circuit to coil power supply, the power tube that control circuit has single-chip microcomputer and receives four bridge-types connections of single-chip microcomputer output signal.
By such scheme as seen, the tooth of brushless single phase direct current machine has two sections circular arcs, and the radius of two sections circular arcs is unequal, produces eccentric air gap like this when the brushless single phase direct current machine starts, thereby strengthen the detent torque of motor, motor can be started under the less situation of starting power.And control circuit uses the electric current of single-chip microcomputer and four power tube control flowing through coil, can avoid using special-purpose control chip to reduce the production cost of motor like this.
A preferred scheme is, the equal in length of the length of first circular arc and second circular arc, and first circular arc and second circular arc be on two concentric circless, and this concentrically ringed center of circle is the center of circle of stator core.
This shows that the two ends circular arc can be simplified the design of the stator punching of making stator core like this on two concentric circless, and two sections arc length equate to be conducive to the generation of eccentric air gap, more stable when making the motor operation.
Further scheme is that the brushless single phase direct current machine also has front end housing and the rear end cap that is installed in outside the stator core two sides.
This shows, front end housing and rear end cap are installed in the both sides of stator core, the sidewall that is stator core will be exposed at outward between front end housing and the rear end cap, be conducive to the heat that stator core produces like this and in time lead away from air, avoid stator core overheated and influence the work of motor.
Further scheme is, rotor has armature spindle and is sleeved on the outer rotor body of armature spindle, rotor body has rotor core and the permanent magnet of injection mo(u)lding outside rotor core, and the perisporium of rotor core is provided with many ribs that extend radially outwardly along rotor core from perisporium.
As seen, rotor body is made of rotor core and permanent magnet, is conducive to rotor body and produces stable magnetic field, guarantees that rotor can rotation stably under the magnetic field that stator produces.
Further scheme is, the axial height of permanent magnet is more than or equal to the axial height of rotor core, and the two end faces of permanent magnet is provided with a plurality of briquettings that radially extend to axis direction from the permanent magnet inwall, and a plurality of briquettings are connected on the end face of rotor core.
This shows, use a plurality of briquettings to be connected on the end face of rotor core, rotor core can be securely fixed in the permanent magnet, avoid rotor core to come off from permanent magnet.
Description of drawings
Fig. 1 is the structure chart of stator among the utility model embodiment.
Fig. 2 is the STRUCTURE DECOMPOSITION figure that stator has dwindled among the utility model embodiment.
Fig. 3 is stator laminating structure figure among the utility model embodiment.
Fig. 4 is the partial enlarged drawing of stator punching among the utility model embodiment.
Fig. 5 is the structure of the utility model embodiment rotor.
Fig. 6 is the STRUCTURE DECOMPOSITION structure that the utility model embodiment rotor has dwindled.
Fig. 7 is the structure structure for amplifying of permanent magnet among the utility model embodiment.
Fig. 8 is the utility model embodiment rotor main body structure structure for amplifying.
Fig. 9 is the electrical schematic diagram of power tube, drive circuit and single-chip microcomputer in the control circuit among the utility model embodiment.
Figure 10 is the electrical schematic diagram of power circuit in the control circuit among the utility model embodiment.
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment
Motor of the present utility model has stator and is installed in the interior rotor of stator, as Fig. 1 and shown in Figure 2, stator 10 has stator core 11 and is wrapped in a plurality of coils 35 on the stator core 11, and stator core 11 is overrided to form by the identical stator punching of multi-disc shape.Stator core 11 roughly is square, circular hole 17 in its middle part is provided with, and rotor is installed in the interior circular hole 17.Offer a screw hole 12 respectively on four angles of stator core 11, so that front end housing and rear end cap are installed in the both sides of stator core 11.
As shown in Figure 3, the silicon steel sheet of stator punching 20 for roughly being square, its four angles are respectively equipped with rounded corner, and offer through hole 25 on each angle respectively, after multi-disc stator punching 20 laminates and forms stator core 11, the through hole 25 of multi-disc stator punching 20 will form screw hole 12.The middle part of stator punching 20 is provided with interior circular hole 22, and the center of circle of interior circular hole 22 is the center of stator punching 20.
From Fig. 3 and Fig. 4 as seen, the equal in length of the length of first circular arc 27 and second circular arc 28, and between first circular arc 27 and second circular arc 28, be connected with one section line segment 29 that radially extends along stator punching 20.
As Fig. 1 and shown in Figure 2, with multi-disc stator punching 20 laminate form stator core 11 after, has yoke portion 14 outside the interior circular hole 17 of stator core 11, and have a plurality of teeth 15 that radially extend to stator core 11 center positions along stator core 11 from yoke portion 14, form groove 16 between two adjacent teeth 15.Be wound with coil 35 on each tooth 15.In the present embodiment, a plurality of coils 35 are connected in series each other, form a single-phase direct current machine.
Identical with stator punching 20, the inward flange of each tooth 15 of stator core 11 has two sections circular arcs, be respectively first circular arc 18 and second circular arc 19, distance between two sections circular arcs and the interior circular hole center of circle is unequal, and namely the distance between first circular arc 18 and interior circular hole 17 centers of circle is less than the distance between second circular arc 19 and interior circular hole 17 centers of circle.In addition, the equal in length of first circular arc 18, second circular arc 19, and be on two concentric circless in the center of circle in the center of circle with interior circular hole 17, two concentrically ringed semidiameters are between 0.3 millimeter to 1.0 millimeters.
Because each tooth 15 has the unequal two sections circular arcs of radius, when electric motor starting, will produce eccentric air gap, the detent torque of motor is bigger, is conducive to motor and starts under lower powered situation, can be applied in such as in the small-sized electric equipment such as electric fan.
Be set with insulation framework outside stator core 11, insulation framework is made of upper skeleton 31 and lower skeleton 32, and insulation framework is sleeved on outside each tooth 15, and a plurality of coils 35 are wrapped on the insulation framework, directly contacts with tooth 15 to avoid coil 35.
Be separately installed with front end housing and rear end cap in the both sides of stator core 11, all not shown front end housing and rear end cap among Fig. 1 and Fig. 2.In the present embodiment, front end housing has four screw holes, and the screw hole 12 with stator core 11 is corresponding respectively.And rear end cap also has four screw holes, also is that four screw holes 12 with stator core 11 are corresponding respectively.During assembling motor, front end housing and rear end cap are installed in the both sides of stator core 11 respectively, and use screw that front end housing, rear end cap and stator core 11 is fixing, are exposed between front end housing and the rear end cap outside four of stator core 11 sidewalls 13 like this, the heat that stator core 11 produces during the motor operation will be dispersed in the air by sidewall 13, be conducive to the timely heat radiation of stator core 11.
The rotor of motor is installed in the interior circular hole 17 of stator 10, but and relative stator rotate.Referring to Fig. 5 and Fig. 6, rotor 40 has armature spindle 41 and is sleeved on armature spindle 41 rotor body 50 outward, and an end of armature spindle 41 is inserted with bearing pin 42, and when armature spindle 41 rotations, bearing pin 42 drives such as rotations such as fan blade around the axis rotation of armature spindle 41.Also be provided with the two ends that jump ring assembly 43,44, two jump ring assemblies 43,44 lay respectively at rotor body 50 on the armature spindle 41.
Be provided with a plurality of briquettings 55 at interior circular hole 56 near end face 54 places of permanent magnets 53, along radially the extending to axis direction of permanent magnet 53, and briquetting 55 is connected on the end face of stator core 51 each briquetting 55 from the inwall of interior circular hole 56.Like this, stator core 51 can be fixed in the permanent magnet 53 by briquetting 55.Be equipped with a plurality of briquettings 55 in each end of permanent magnet 53, a plurality of briquettings 55 circumferentially evenly distributing along permanent magnet 53 of same end face.
In the present embodiment, the axial height of permanent magnet 53 is greater than the axial height of rotor core 51, it is fixing with rotor core 51 at permanent magnet 53 briquetting 55 to be set, do not need the structure of permanent magnet 53 being arranged to wrap up rotor core 51, can save the use of permanent magnetic material, thereby save the production cost of motor.Certainly, the axial height of permanent magnet 53 also can be designed to equate with the axial height of rotor core 51.
Front end housing or the rear end cap of motor are outside equipped with circuit board, circuit board is provided with control circuit, control circuit has single-chip microcomputer and by monolithic processor controlled a plurality of power tubes, and be connected with drive circuit between single-chip microcomputer and the power tube, drive circuit comprises a plurality of triodes, for the signal that receives single-chip microcomputer output and to the power tube output drive signal.
Referring to Fig. 9, control circuit has power tube Q1, Q2, Q3, the Q4 that four bridge-types connect, and four power tube Q1, Q2, Q3, Q4 are field effect transistor, and four power tube Q1, Q2, Q3, Q4 and motor body M constitute the H bridge.Motor body M is stator and the rotor of motor, and four power tube Q1, Q2, Q3, Q4 are to the coil output current of stator, thus rotation direction and the rotating speed of control rotor.
Control circuit has single-chip microcomputer 60 and drive circuit, drive circuit comprises first drive circuit and second drive circuit, first drive circuit comprises four triode U5, U6, U7, U8, wherein triode U5 receives the signal of single-chip microcomputer 60 outputs, and to triode U6 output signal, the break-make of triode U6, U7 control power tube Q1.Triode U8 also receives the signal of telecommunication of single-chip microcomputer 60 outputs, and the break-make of control power tube Q2.
Second drive circuit comprises four triode U1, U2, U3, U4, and wherein triode U1 receives the signal of single-chip microcomputer 60 outputs, and to triode U2 output signal, the break-make of triode U2, U3 control power tube Q3.Triode U4 also receives the signal of telecommunication of single-chip microcomputer 60 outputs, and the break-make of control power tube Q4.
Because four power tube Q1, Q2, Q3, Q4 and motor body M constitute the H bridge, therefore four power tube Q1, Q2, Q3, Q4 lead at the signal lower whorl conductance of single-chip microcomputer 10 outputs, as in very first time section, power tube Q1, Q4 conducting, power tube Q2, Q3 end, electric current can flow through power tube Q1, motor body M and power tube Q4, in second time period, power tube Q1, Q3 conducting, power tube Q1, Q4 end, electric current flow through power tube Q3, motor body M and power tube Q2, thus realize control to motor.
By the signal of control single chip computer 60 outputs, can change the make-and-break time of power tube Q1, Q2, Q3, Q4, thereby change the size of current of the stator coil of flowing through, and then the rotating speed of control rotor.
Control circuit also is provided with power circuit, as shown in figure 10, current circuit comprises the bridge rectifier that four diode D1, D2, D3, D4 constitute, rectification circuit and filter capacitor C5 are connected in parallel, rectification circuit and filter capacitor C5 have constituted current rectifying and wave filtering circuit, convert the AC signal that receives to direct current signal VCC.
Power circuit also comprises transformation chip 61, and transformation chip 61 receives the direct current signal VCC of current rectifying and wave filtering circuit output, and uses for drive circuit with direct current signal VCC step-down and through forming DC power supply VDD after voltage-stabiliser tube D7, the D26 voltage stabilizing.
Because the brushless single phase direct current machine adopts the structure of single phase winding, it is simple in structure, and production cost is lower.And the tooth of stator core adopts two sections unequal circular arc designs of radius, produces eccentric air gap when electric motor starting, is conducive to the startup of motor.
Certainly, above-described embodiment only be the utility model preferred embodiment, during practical application more change can be arranged, for example, the length of the length of first circular arc and second circular arc is unequal; Perhaps, rotor body is not to be made of rotor core and permanent magnet, but directly outside armature spindle injection moulding form columned permanent magnet as rotor body, such change also can realize the purpose of this utility model.
It is emphasized that at last the utility model is not limited to above-mentioned execution mode, also should be included in the protection range of the utility model claim as the change of the quantity of tooth on the stator punching, the variations such as change of stator core shape.
Claims (10)
1. the brushless single phase direct current machine comprises
Stator and the rotor that is positioned at described stator, described stator has stator core and is wrapped in coil on the described stator core, a plurality of teeth that described stator core has yoke portion and extends to the stator core center position from described yoke portion, and the middle part of described stator core is provided with interior circular hole;
It is characterized in that:
Have first circular arc and second circular arc on the inward flange of each described tooth, the distance between the center of circle of described first circular arc and described interior circular hole is less than the distance between the center of circle of described second circular arc and interior circular hole;
Described brushless single phase direct current machine also is provided with the control circuit to described coil power supply, the power tube that described control circuit has single-chip microcomputer and receives four bridge-types connections of described single-chip microcomputer output signal.
2. brushless single phase direct current machine according to claim 1 is characterized in that:
The equal in length of the length of described first circular arc and described second circular arc.
3. brushless single phase direct current machine according to claim 2 is characterized in that:
Described first circular arc and described second circular arc are on two concentric circless, and the center of circle that is described stator core, the described concentrically ringed center of circle.
4. brushless single phase direct current machine according to claim 3 is characterized in that:
Two described concentrically ringed semidiameters are between 0.3 millimeter to 1 millimeter.
5. according to claim 1 or 4 each described brushless single phase direct current machines, it is characterized in that:
Described brushless single phase direct current machine also has front end housing and the rear end cap that is installed in outside the described stator core two sides.
6. according to claim 1 or 4 each described brushless single phase direct current machines, it is characterized in that:
Described control circuit also is provided with the drive circuit that is connected between described single-chip microcomputer and the described power tube, and described drive circuit receives the signal of described single-chip microcomputer and drives described power tube work.
7. brushless single phase direct current machine according to claim 6 is characterized in that:
Described control circuit also is provided with the power circuit to described drive circuitry, and described power circuit has current rectifying and wave filtering circuit and receives the transformation chip of described current rectifying and wave filtering circuit output signal.
8. according to claim 1 or 4 each described brushless single phase direct current machines, it is characterized in that:
Described rotor has armature spindle and is sleeved on the outer rotor body of described armature spindle, described rotor body has rotor core and the permanent magnet of injection mo(u)lding outside described rotor core, and the perisporium of described rotor core is provided with many ribs that extend radially outwardly along rotor core from described perisporium.
9. brushless single phase direct current machine according to claim 8 is characterized in that:
The axial height of described permanent magnet is more than or equal to the axial height of described rotor core, and the two end faces of described permanent magnet is provided with a plurality of briquettings that radially extend to axis direction from described permanent magnet inwall, and a plurality of described briquettings are connected on the end face of described rotor core.
10. brushless single phase direct current machine according to claim 9 is characterized in that:
A plurality of described briquetting on the same end face of described permanent magnet was upwards evenly arranged in the week of described permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320088888 CN203119732U (en) | 2013-02-26 | 2013-02-26 | Single-phase brushless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320088888 CN203119732U (en) | 2013-02-26 | 2013-02-26 | Single-phase brushless DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203119732U true CN203119732U (en) | 2013-08-07 |
Family
ID=48900047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320088888 Expired - Fee Related CN203119732U (en) | 2013-02-26 | 2013-02-26 | Single-phase brushless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203119732U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286346A (en) * | 2016-09-30 | 2017-01-04 | 依必安派特风机(上海)有限公司 | A kind of axial fan |
| CN108288902A (en) * | 2018-04-10 | 2018-07-17 | 青岛千钧投资企业（有限合伙） | Permanent magnet brushless motor for electric vehicle |
| CN108418379A (en) * | 2018-05-03 | 2018-08-17 | 湖州越球电机有限公司 | A kind of BLDC motors of low cost |
| CN108599406A (en) * | 2018-01-26 | 2018-09-28 | 捷和电机制品(深圳)有限公司 | Single-phase brushless direct-current motor |
-
2013
- 2013-02-26 CN CN 201320088888 patent/CN203119732U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106286346A (en) * | 2016-09-30 | 2017-01-04 | 依必安派特风机(上海)有限公司 | A kind of axial fan |
| CN108599406A (en) * | 2018-01-26 | 2018-09-28 | 捷和电机制品(深圳)有限公司 | Single-phase brushless direct-current motor |
| CN108599406B (en) * | 2018-01-26 | 2024-04-09 | 捷和电机制品(深圳)有限公司 | Single-phase brushless DC motor |
| CN108288902A (en) * | 2018-04-10 | 2018-07-17 | 青岛千钧投资企业（有限合伙） | Permanent magnet brushless motor for electric vehicle |
| CN108288902B (en) * | 2018-04-10 | 2023-02-10 | 深圳市斗索科技有限公司 | Permanent magnet brushless motor for electric vehicle |
| CN108418379A (en) * | 2018-05-03 | 2018-08-17 | 湖州越球电机有限公司 | A kind of BLDC motors of low cost |
| CN108418379B (en) * | 2018-05-03 | 2024-03-01 | 湖州越球电机有限公司 | Low-cost BLDC motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203734386U (en) | Stator used in motor and motor used in machine | |
| JP5867628B2 (en) | Double stator type switched reluctance rotating machine | |
| US10033242B2 (en) | Electrical machines and methods of assembling the same | |
| CN203119732U (en) | Single-phase brushless DC motor | |
| US10110105B2 (en) | Disc power generator | |
| JP2016174521A (en) | Single-phase brushless motor | |
| CN104967253B (en) | At a high speed without Hall three-phase motor of dust collector | |
| US7755236B2 (en) | Ceiling fan motor | |
| CN203708050U (en) | Stator used in motor and bipolar motor used in machine | |
| CN103199642A (en) | Motor | |
| JP2017085877A (en) | Airflow regulator | |
| CN204858787U (en) | Rotor punching and permanent -magnet machine who uses thereof | |
| CN103001424A (en) | Axial-radial excitation permanent magnet brushless outward turning motor | |
| CN204118995U (en) | Individual layer many drivings winding magnetic suspension switched reluctance motor | |
| CA2834124A1 (en) | Reduced cogging torque permanent magnet machine | |
| CN203193470U (en) | Single-phase brushless direct current motor | |
| CN204992936U (en) | There is not hall three -phase dust catcher motor at a high speed | |
| WO2019119803A1 (en) | Fan assembly and household appliance | |
| JP5795170B2 (en) | Power generation system | |
| CN207782509U (en) | motor and compressor | |
| CN207994879U (en) | Motor and food cooking machine | |
| CN105305750A (en) | Motor and rotor power device, aircraft | |
| CN204089369U (en) | A kind of spindle nose disk generator | |
| JP2016178801A (en) | Switched reluctance rotary machine and rotary device | |
| CN204231101U (en) | A kind of external rotor generator without bearing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20210226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |