CN204439257U - A kind of small-sized super high speed motor experiment loading unit - Google Patents
A kind of small-sized super high speed motor experiment loading unit Download PDFInfo
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- CN204439257U CN204439257U CN201520172634.5U CN201520172634U CN204439257U CN 204439257 U CN204439257 U CN 204439257U CN 201520172634 U CN201520172634 U CN 201520172634U CN 204439257 U CN204439257 U CN 204439257U
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Abstract
The utility model discloses a kind of small-sized super high speed motor experiment loading unit, comprise base, motor, eddy-current disc, field copper, excitation sleeve, support and dynamometer machine load; Wherein, motor is positioned on base, motor connects eddy-current disc, eddy-current disc is nested in excitation sleeve, eddy-current disc and excitation sleeve coaxially arranged in parallel, by magnetic Field Coupling transmitted power, excitation sleeve is wound with field copper, field copper connects voltage adjustable DC power supply, produce exciting current, exciting current produces uniform single pole magnetic field in excitation sleeve, and this magnetic field induction current in the eddy-current disc rotated produces retarding torque, torque measurement system measures described retarding torque, is provided with rotary speed detecting system and measures motor speed or eddy-current disc rotating speed.The utility model structure is simple, moment of inertia is little, almost without additional radial pressure, dynamometer machine rotor without frictional dissipation, easy for installation, vibration and noise reducing, be applicable to the performance test of small-sized super high speed motor.
Description
Technical field
The utility model relates to a kind of small-sized super high speed motor experiment loading unit.
Background technology
In the performance test of motor, extensively adopt various dynamometer machine as load, the kind of dynamometer machine is a lot, mainly contains magnetic hysteresis dynamometer machine, eddy current dynamometer, magnetic dynamometer machine, synchronous dynamometer machine etc.In conventional motor test, between motor and dynamometer machine, general employing machenical coupling rigid connection, realizes power transimission.But in super high speed motor, the coaxiality error that shaft coupling is installed can cause very large vibration noise, affect measuring accuracy, test in some cases and even cannot carry out, because miniature high-speed motor speed is very high, load torque is very little, requires that proving installation inertia is little and load torque and high-speed electric expreess locomotive are strictly coaxial, otherwise asymmetric radial force can be produced to motor shaft system, cause shafting vibration to affect measuring accuracy, even can damage high-speed electric expreess locomotive bearing.Magnetic coupling can realize the contactless power transimission between motor and dynamometer machine, but non-uniform air-gap can cause larger asymmetric radial force when the quality of magnetic coupling self and installation, add the dynamometer machine friction rotor loss that cannot ignore, cause accuracy of detection lower.
Chinese patent CN1211729A " contactless is torque-measuring apparatus ", Chinese patent CN104155038A " non-contact electric saw power method for fast measuring ", field coil is utilized to produce single pole magnetic field in the air gap of ferromagnetic material, this magnetic field and the locally coupled generation load torque of eddy-current disc, realize noncontact to load, this structure is more applicable for middle and slow speed of revolution duty factor, but it is also inadaptable for miniature high-speed motor, because the moment of torsion that in above-mentioned patent, eddy-current disc produces is non-uniform Distribution on dish, motor shaft can be made to produce asymmetric radial force, cause shafting vibration, affect measuring accuracy.
Chinese patent 101488691 " air gap variant eddy speed regulating induction motor and working method ", Chinese patent CN10140042C " adjustable magnetic coupler " produces symmetrical load torque by eddy-current disc and permanent magnetic disk or armature winding magnetic field induction, realize noncontact to load, but this structure must ensure that between eddy-current disc and permanent magnetic disk or stator core, air gap is even, otherwise load torque can produce larger mal-distribution, cause motor shafting vibration, this structure visible proposes very high requirement for the right alignment of eddy-current disc axle and motor shaft, middle low speed occasion Project Realization is easier to, but high-speed electric expreess locomotive is then difficult to realize.
Utility model content
The utility model is in order to solve the problem, propose a kind of small-sized super high speed motor experiment loading unit, can to realize between high-speed electric expreess locomotive with dynamometer machine load contactless is coupled for this device, overcome asymmetric load torque that right alignment alignment error causes thus reduce installation difficulty, reduce vibration noise and frictional dissipation, improve measuring accuracy.
To achieve these goals, the utility model adopts following technical scheme:
A kind of small-sized super high speed motor experiment loading unit, comprises base, motor, eddy-current disc, field copper, excitation sleeve, support and dynamometer machine load, wherein, motor is positioned on base, motor connects eddy-current disc, eddy-current disc is nested in excitation sleeve, eddy-current disc and excitation sleeve coaxially arranged in parallel, by magnetic Field Coupling transmitted power, excitation sleeve is wound with field copper, field copper connects voltage adjustable DC power supply, produce adjustable exciting current, exciting current produces uniform single pole magnetic field in excitation sleeve, this magnetic field induction current in the eddy-current disc rotated produces retarding torque, torque measurement system measures described retarding torque, excitation sleeve is fixed on rack shaft one end, the rack shaft other end is connected with dynamometer machine load, be provided with rotary speed detecting system and measure motor speed or eddy-current disc rotating speed.
Described dynamometer machine load is weight.
Described excitation sleeve can rotate with rack shaft.
Described field copper is concentric type concentratred winding, by copper cash or aluminum steel coiling, when flowing through DC excitation electric current, produces unipolarity uniform magnetic field in excitation sleeve.
The number of turn of described field copper and wire diameter magnetic flux density as requested and field power supply voltage are determined.
The internal diameter of described excitation sleeve is greater than the external diameter of eddy-current disc.
Described eddy-current disc is disc, is non-magnetic conductive material.
Described excitation sleeve is cylindrical shape, is nonmagnetic substance.
Described torque testing system comprises foil gauge, signal processing circuit and digital display device, and described strain gauge adhesion is on rack shaft, and foil gauge connection signal treatment circuit, signal processing circuit connects digital display device.
The quality of described weight is corresponding with the size of tested torque with the length of the arm of force.
Principle of work of the present utility model is: by single pole magnetic field even in excitation sleeve and eddy-current disc inductively, produces load torque symmetrically, and can to realize between high-speed electric expreess locomotive with dynamometer machine load contactless is coupled.Because excitation sleeve is static, therefore dynamometer machine end does not have mechanical loss, reduces the moment of inertia of tested High-speed Electric arbor system simultaneously.In addition, when the eddy-current disc in high-speed electric expreess locomotive shaft extension and excitation sleeve install exist with axle misalignment time, what produce in excitation sleeve due to DC excitation electric current is even single pole magnetic field, coupled relation and the amplitude size of high-speed electric expreess locomotive eddy-current disc and the interior evenly single pole magnetic field of excitation sleeve all do not change, namely on eddy-current disc, still can produce load torque equally symmetrically, avoid the vibration of motor shaft system, thus do not affect high-speed electric expreess locomotive torque measurement precision, the small-sized super high speed motor experiment loading unit that visible the utility model provides can reduce installation difficulty preferably, reduce vibration noise and frictional dissipation, improve measuring accuracy.
The beneficial effects of the utility model are: structure is simple, moment of inertia is little, almost without additional radial pressure, dynamometer machine rotor without frictional dissipation, easy for installation, vibration and noise reducing, be applicable to the performance test of small-sized hypervelocity high-speed electric expreess locomotive.
Accompanying drawing explanation
Fig. 1 is the principle schematic of the small-sized super high speed motor experiment loading unit of the utility model;
Fig. 2 is small-sized super high speed motor experiment loading unit A-A sectional view.
1-chassis; 2-motor; 3-eddy-current disc; 4-field copper; 5-excitation sleeve; 6-support; 7-weight.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
As shown in Figure 1, form primarily of the eddy-current disc 3 of High Rotation Speed, static excitation sleeve 5 and torque detection system.During use, eddy-current disc 3 is coaxially connected with motor 2 output shaft, the field copper 4 of excitation sleeve 5 connects adjustable DC power supply, exciting current produces uniform single pole magnetic field in excitation sleeve 5, this magnetic field induction current in the eddy-current disc rotated produces retarding torque, the size of this torque is monitored by torque detection system and shows, then can obtain bearing power in conjunction with Rotating speed measring.Regulate exciting current can regulating load power easily.
As shown in Figure 1, eddy-current disc 3 adopts non-magnetic conductive material manufacture, such as copper, aluminium, stainless steel etc., the axial force that motor is subject to can be reduced, rigid connection is adopted between eddy-current disc and motor shaft, eddy-current disc is installed to after on motor shaft, answers entirety to carry out dynamic balance running, to ensure stationarity during high speed operation of motor.
As depicted in figs. 1 and 2, excitation sleeve 5 is static, but can deflect certain angle around axle, to realize the balance of eddy-current brake torque and weight gravitational torque.Excitation sleeve 5 adopts nonmagnetic substance to make, and to ensure that excitation sleeve internal magnetic field is even, and excitation sleeve diameter is greater than eddy-current disc external diameter, to ensure effective regional magnetic field homogeneity.Field copper 4 adopts enamel covered wire coiling, and its number of turn and wire diameter magnetic flux density as requested and field power supply voltage are determined.
Torque testing system is made up of high sensitivity foil gauge, signal processing circuit and digital display device, and strain gauge adhesion is on the axle of excitation sleeve.Weight 7 in Fig. 1, its quality is corresponding with the size of tested torque with the length of the arm of force, can design some column weights hammer, to improve the versatility of device.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (10)
1. a small-sized super high speed motor experiment loading unit, is characterized in that: comprise base, motor, eddy-current disc, field copper, excitation sleeve, support and dynamometer machine load, wherein, motor is positioned on base, motor connects eddy-current disc, eddy-current disc is nested in excitation sleeve, eddy-current disc and excitation sleeve coaxially arranged in parallel, by magnetic Field Coupling transmitted power, excitation sleeve is wound with field copper, field copper connects voltage adjustable DC power supply, produce adjustable exciting current, exciting current produces uniform single pole magnetic field in excitation sleeve, this magnetic field induction current in the eddy-current disc rotated produces retarding torque, torque measurement system measures described retarding torque, excitation sleeve is fixed on rack shaft one end, the rack shaft other end is connected with dynamometer machine load, be provided with rotary speed detecting system and measure motor speed or eddy-current disc rotating speed.
2. a kind of small-sized super high speed motor experiment loading unit as claimed in claim 1, is characterized in that: described excitation sleeve can rotate around rack shaft.
3. a kind of small-sized super high speed motor experiment loading unit as claimed in claim 1, is characterized in that: described field copper is concentric type concentratred winding, by copper cash or aluminum steel coiling, when flowing through DC excitation electric current, produces unipolarity uniform magnetic field in excitation sleeve.
4. a kind of small-sized super high speed motor experiment loading unit as claimed in claim 2, is characterized in that: described excitation sleeve diameter is greater than the external diameter of eddy-current disc.
5. a kind of small-sized super high speed motor experiment loading unit as claimed in claim 1, it is characterized in that: described eddy-current disc is disc, is non-magnetic conductive material.
6. a kind of small-sized super high speed motor experiment loading unit as claimed in claim 1, it is characterized in that: described torque testing system comprises foil gauge, signal processing circuit and digital display device, described strain gauge adhesion is on rack shaft, foil gauge connection signal treatment circuit, signal processing circuit connects digital display device.
7. a kind of small-sized super high speed motor experiment loading unit as claimed in claim 1, is characterized in that: described excitation sleeve is cylindrical shape, is made up of nonmagnetic substance.
8. a kind of small-sized super high speed motor experiment loading unit as claimed in claim 1, is characterized in that: described dynamometer machine load is weight.
9. a kind of small-sized super high speed motor experiment loading unit as claimed in claim 8, is characterized in that: the quality of described weight is corresponding with the size of tested torque with the length of the arm of force.
10. a kind of small-sized super high speed motor experiment loading unit as claimed in claim 1, is characterized in that: the number of turn of described field copper and wire diameter magnetic flux density as requested and field power supply voltage are determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520172634.5U CN204439257U (en) | 2015-03-25 | 2015-03-25 | A kind of small-sized super high speed motor experiment loading unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520172634.5U CN204439257U (en) | 2015-03-25 | 2015-03-25 | A kind of small-sized super high speed motor experiment loading unit |
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| Publication Number | Publication Date |
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| CN204439257U true CN204439257U (en) | 2015-07-01 |
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| CN201520172634.5U Expired - Fee Related CN204439257U (en) | 2015-03-25 | 2015-03-25 | A kind of small-sized super high speed motor experiment loading unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697686A (en) * | 2015-03-25 | 2015-06-10 | 王晛 | Small-sized ultra-high-speed motor test loading device |
-
2015
- 2015-03-25 CN CN201520172634.5U patent/CN204439257U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697686A (en) * | 2015-03-25 | 2015-06-10 | 王晛 | Small-sized ultra-high-speed motor test loading device |
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| 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: 20150701 Termination date: 20160325 |
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| CF01 | Termination of patent right due to non-payment of annual fee |