CN2048256U - Cantilever dish-type d.c. generator with symmetrical double-magnetic body - Google Patents
Cantilever dish-type d.c. generator with symmetrical double-magnetic body Download PDFInfo
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- CN2048256U CN2048256U CN 89202481 CN89202481U CN2048256U CN 2048256 U CN2048256 U CN 2048256U CN 89202481 CN89202481 CN 89202481 CN 89202481 U CN89202481 U CN 89202481U CN 2048256 U CN2048256 U CN 2048256U
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- magnet
- bearing
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- end cap
- cantilever
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Abstract
The utility model relates to a cantilever dish-type D. C. Generator with symmetrical double-magnetic body, comprising a stator exciting circuit which adopts symmetric structure with double magnets; a rotor whose rotating shaft is provided with cantilever type and a disc typed armature winding which is formed of the formation of symmetric double-layer sector coil by solidifying thermosetting plastic. Thu utility model which is convenient to assemble ensures the dimension of air gap between the stator and the rotor and eliminates the axial float of the rotating shaft of the electrical motor. The cantilever dish-type D. C. Generator with symmetrical double-magnetic body has the advantages of little deformation of the armature winding, high intensity and good regulating characteristics of the electrical motor. As compared with the DC disk electric motors with single magnet, the utility model which improves the air gap magnetic density and the efficiency of the electrical motor about 10% is especially suitable for small power DC permanent motor whose horsepower is less than 200 watts.
Description
This motor is a kind of permanent magnet direct current motor.
Existing DC-disc type motor adopts axial air-gap magnetic field, its structure is that a circular ring magnet or some blocks of sector magnets (claiming single magnet again) are housed in the stator cage perpendicular to rotating shaft, epitrochanterian two bearings are installed in two ends of armature rotor axle respectively, because armature rotor is a non-magnet material, axial air-gap between stator and the armature rotor biend is bigger, magnetic in this air gap is close lower, and efficiency of motor is not high.Be installed in the two ends of armature rotor axle again respectively owing to two bearings, in order both to guarantee the design axial air-gap between armature rotor biend and the stator, guarantee that again the end play between two bearings of motor is zero, eliminate the axial endplay of armature rotor, the requirement height of motor assembling is installed and is adjusted difficulty.
The purpose of this utility model provides a kind of DC-disc type motor of new construction, and is close because of improving axial air-gap magnetic, and improves efficiency of motor, and it is easy to adjust that the structure of this motor makes it to assemble, and manufacturing cost reduces.
The utility model is that a kind of structure is the cantilevered DC-disc type motor of symmetric double magnet, a circular ring magnet or some blocks of sector magnets are respectively arranged on stator left end cap and the right end cap, constitute symmetric double magnet magnetic circuit, rotor is installed and is adopted cantilever type, two bearings are contained in the same side of armature winding in the rotating shaft, the opposite side of armature winding is a commutator in the rotating shaft, and armature winding is the disc type double layer sector coil of symmetry.
Describe summary of the invention of the present utility model and embodiment in detail below in conjunction with accompanying drawing.
As shown in Figure 1, this motor stator left end cap ［ 13 ］, a right end cap ［ 4 ］ and a left side, the ringshaped magnet ［ 12 ］ of right each circular ring magnet or some fan-shaped block magnet assembly units has constituted the symmetric double magnet magnetic circuit of motor, about the ringshaped magnet of each circular ring magnet or some fan-shaped block magnet assembly units be contained in stator left end cap and the right end cap symmetrically respectively, stator left end cap and right end cap are corresponding to main magnetic circuit part (installation magnet segment) shape symmetry, size equates, the material of circular ring magnet or fan-shaped block magnet is a ferrite permanent-magnet materials, or samarium-cobalt alloy, or Nd-Fe-Bo permanent magnet material.Armature rotor ［ 3 ］ as depicted in figs. 1 and 2, because it is cantilever structure that rotor is installed, bearing ［ 1 ］ (two rolling bearings or two sliding bearings of keeping at a certain distance away) is contained in the same end of rotating shaft ［ 6 ］, the rotating shaft stage casing is the armature rotor ［ 3 ］ of the disc type double layer sector coil of symmetry, the outward appearance of armature rotor resembles one and spends indigo plant, among Fig. 2, the lead-in wire node of ［ 21 ］ expression winding.Commutator ［ 16 ］ is contained in the other end of rotating shaft ［ 6 ］ with respect to bearing ［ 1 ］.
The end play of this motor is zero, the structure of this part is such (Fig. 1): two certain distances of rolling bearing or sliding bearing interval of bearing ［ 1 ］ are contained in bearing pedestal ［ 7 ］ the inside, bearing pedestal ［ 7 ］ connects (riveted joint or spot welding) mutually with stator left end cap ［ 13 ］, front shroud ［ 10 ］ covers on the bearing pedestal ［ 7 ］, snap ring ［ 11 ］ is stuck in the rotating shaft ［ 6 ］ of two ends about two bearings, between two rolling bearings or the sliding bearing adjustment cushion film ［ 8 ］ and sleeve ［ 9 ］ are arranged, holding screw ［ 2 ］ is arranged, in order to the relative position between fixed bearing block ［ 7 ］ and the sleeve ［ 9 ］ on the bearing pedestal ［ 7 ］.Motor when assembling, select the adjustment cushion film ［ 8 ］ of suitable thickness, it is zero just can making the end play of the motor bearings after the general assembly.In the installation process, as long as adjust the relative position between bearing pedestal ［ 7 ］ and the sleeve ［ 9 ］, just can guarantee the air gap size of designing requirement between motor stator and the rotor, use the relative position of holding screw ［ 2 ］ fixed bearing block ［ 7 ］ and sleeve ［ 9 ］ at last.
Back cover ［ 5 ］ is the dust cap of motor, and brush carrier assembly ［ 15 ］ is arranged in the interior space of back cover, and it is made up of brush ［ 17 ］, spring ［ 18 ］ and brush holder ［ 19 ］.Insulating pad ［ 20 ］ prevents that brush holder ［ 19 ］ from contacting with right end cap ［ 4 ］.Sheet shape connector ［ 14 ］ is the plug of DC power supply, by drawing in the back cover ［ 5 ］.Brush carrier assembly ［ 15 ］ all connects with right end cap ［ 4 ］ mutually with back cover ［ 5 ］.
This motor adopts axial air-gap magnetic field, and magnetic pole is evenly distributed on the plane perpendicular to rotating shaft, and the magnet in this symmetric double magnet magnetic circuit can also can be assembled into ringshaped magnet with some blocks of fan-shaped block magnet, as shown in Figure 3 with the magnet of two annulars.In disc DC motor,, adopt the magnetic pole logarithm usually more than or equal to 3 in order to reduce the length of end winding.Employing magnetic pole logarithm is 4 structural shape in Fig. 3.
Stator left end cap and right end cap can form with the sheet metal punching out, because they install the shape symmetry of magnet segment, size is equal, thereby have saved the punch die quantity of punching out processing, have reduced manufacturing cost.
The cantilever structure of the utility model disc DC motor rotor shaft is convenient to assembling and is adjusted, and can guarantee the air gap size between motor stator and the rotor, and the end play that can make motor bearings again is zero.
In order to make full use of the permanent magnetic material of motor, the inside and outside end of armature winding is placed outside the axial air-gap magnetic field, and adopted the form (see figure 2) of symmetrical double-deck sector (-shaped) coil, what the wiring of armature winding was adopted is whole connected mode apart from single wave winding, and armature winding is shaped to solidify with thermoset plastics at last and forms.This armature winding has the utilance height of copper cash, and intensity is good, and plastic compression solidifies the back and is out of shape advantages such as little.
The utility model disc DC motor is compared with single magnet magnetic circuit motor, owing to adopt the magnetic structure of symmetric double magnet, when not increasing the permanent magnetic material consumption, can improve air gap flux density, improve the uniformity of air gap flux density under the magnetic pole, reduce the copper consumption of armature winding, improve the adjusting function of motor, improve efficiency of motor.
The utility model structure is specially adapted to the following small-power permanent magnet direct current motor of two hectowatts.For example: when the axial air-gap of motor is 3.5～4 millimeters, the thickness of ferrite bead is 9 millimeters, and air gap flux density improves 10%.At rotating speed be about 2400 rev/mins, power output is 50 watt-hours, efficiency of motor reaches 65%, improves about 10% than the efficient with single magnet permanent magnet direct current motor of power.
Fig. 1 symmetric double magnet cantilever type DC-disc type motor
The armature winding of Fig. 2 symmetric figure double layer sector coil
Fig. 3 annular magnetic steel magnetic pole distributes
Below be two embodiment of the present utility model (as Figure 1-3):
Motor overall dimension (outer diameter D * width B):
114.4 * 24 millimeters
Motor axial length: 79.5 millimeters
Circular ring magnet (two): ferrite permanent-magnet materials
60 millimeters of 100 millimeters diameter of bores of external diameter
9 millimeters of thickness (magnetic field orientating)
Number of pole-pairs: 4
Armature rotor diameter: 110 millimeters
The thickness of armature rotor sheet: 2.6 millimeters
Armature winding: 33 coils
Each coil: 14 circles, φ 0.53/0.59 high strength enamelled wire, whole apart from single wave winding wiring.
At DC power supply voltage is 24 volts, and current of electric is 3.2 ampere-hours, and power output is 50 watts.
Motor overall dimension (outer diameter D * width B):
150 * 15 millimeters
Motor axial length: 79.5 millimeters
Fan-shaped block magnet (32): Nd-Fe-Bo permanent magnet material
The external arc diameter: 130 millimeters,
Interior arc diameter:
80 millimeters
18 ° at corresponding central angle
3 millimeters of thickness (magnetic field orientating)
Number of pole-pairs: 8
Armature rotor diameter: 144 millimeters
Armature rotor sheet thickness: 3.5 millimeters
Armature winding: 33 coils
Each coil: 8 circles, φ 0.8/0.86 high strength enamelled wire, whole apart from single wave winding wiring.
Motor is 24 volts at DC power supply voltage, and current of electric is 8 ampere-hours, and power output is 150 watts.
Claims (5)
1, a kind of DC disc-type electric motor, its formation comprises the stator end cap, magnet, rotating shaft and bearing, armature rotor, commutator, the brush carrier assembly, and front shroud and back cover, it is characterized in that by stator left end cap [13], right end cap [4] and about each circular ring magnet or some blocks of sector magnets [12] constitute symmetric double magnet magnetic circuit, each magnet [12] is contained in respectively in stator left end cap [13] and the right end cap [4] symmetrically about said, armature rotor [3] is the disc type double layer sector coil of symmetry, rotor is installed as cantilever type, bearing [1] is two rolling bearings that keep at a certain distance away or sliding bearing, be contained in the same end of axle [6], the bearing pedestal [7] of dress bearing [1] connects mutually with left end cap [13].
2, DC-disc type motor as claimed in claim 1, it is characterized in that forming between two rolling bearings or two sliding bearings of bearing ［ 1 ］, adjustment cushion film ［ 8 ］ and sleeve ［ 9 ］ are arranged, be useful on the holding screw ［ 2 ］ of relative position between fixed bearing block ［ 7 ］ and the sleeve ［ 9 ］ on the bearing pedestal ［ 7 ］.
3, DC-disc type motor as claimed in claim 1 or 2 is characterized in that the magnet in two magnet magnetic circuits is two circular ring magnets, or is assembled into ringshaped magnet with some blocks of fan-shaped block magnet.
4, DC-disc type motor as claimed in claim 3 is characterized in that ferromagnetic material is ferrite permanent-magnet materials or samarium-cobalt alloy or Nd-Fe-Bo permanent magnet material.
5, DC-disc type motor as claimed in claim 1 or 2 is characterized in that the whole connected mode apart from single wave winding of armature rotor ［ 3 ］ wiring employing, is shaped with thermoset plastics and solidifies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202481 CN2048256U (en) | 1989-03-11 | 1989-03-11 | Cantilever dish-type d.c. generator with symmetrical double-magnetic body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202481 CN2048256U (en) | 1989-03-11 | 1989-03-11 | Cantilever dish-type d.c. generator with symmetrical double-magnetic body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2048256U true CN2048256U (en) | 1989-11-22 |
Family
ID=4860214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89202481 Withdrawn CN2048256U (en) | 1989-03-11 | 1989-03-11 | Cantilever dish-type d.c. generator with symmetrical double-magnetic body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2048256U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102714440A (en) * | 2010-01-14 | 2012-10-03 | 日立工机株式会社 | Electric operating machine |
| US8988019B2 (en) | 2010-01-14 | 2015-03-24 | Hitachi Koki Co., Ltd. | Electric operating machine |
| CN105406614A (en) * | 2015-12-04 | 2016-03-16 | 北京青云航空仪表有限公司 | Landing guide apparatus |
| US9359937B2 (en) | 2010-03-31 | 2016-06-07 | Hitachi Koki Co., Ltd. | Two-cycle engine and engine tool comprising the same |
-
1989
- 1989-03-11 CN CN 89202481 patent/CN2048256U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102714440A (en) * | 2010-01-14 | 2012-10-03 | 日立工机株式会社 | Electric operating machine |
| US8917037B2 (en) | 2010-01-14 | 2014-12-23 | Hitachi Koki Co., Ltd. | Electric operating machine |
| US8988019B2 (en) | 2010-01-14 | 2015-03-24 | Hitachi Koki Co., Ltd. | Electric operating machine |
| CN102714440B (en) * | 2010-01-14 | 2015-09-30 | 日立工机株式会社 | Electric operating machine |
| US9359937B2 (en) | 2010-03-31 | 2016-06-07 | Hitachi Koki Co., Ltd. | Two-cycle engine and engine tool comprising the same |
| CN105406614A (en) * | 2015-12-04 | 2016-03-16 | 北京青云航空仪表有限公司 | Landing guide apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |