CN2602379Y - Permanent-magnet brushless DC tachometer - Google Patents
Permanent-magnet brushless DC tachometer Download PDFInfo
- Publication number
- CN2602379Y CN2602379Y CN 03218607 CN03218607U CN2602379Y CN 2602379 Y CN2602379 Y CN 2602379Y CN 03218607 CN03218607 CN 03218607 CN 03218607 U CN03218607 U CN 03218607U CN 2602379 Y CN2602379 Y CN 2602379Y
- Authority
- CN
- China
- Prior art keywords
- shell
- stator
- direct current
- rotor
- permanent
- 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
Abstract
The utility model relates to a permanent-magnet brushless DC tachometer for DC motors, comprising a closed shell cavity which consists of a cylindrical shell and a front end cover and a back end cover in a matching way. A stator iron core and a stator winding are arranged in the inner circumference of the shell; the stator iron core is internally provided with a permanent magnet rotor; the rotating axles on the two ends of the rotor lean on the end covers on the two sides of the machine cover through a front bearing and a back bearing; a rectifying plate is arranged at one side of the shell cavity; and the shell is externally connected with a connection terminal. When the speed measuring machine is in operation, the precisely calculated stator which is inserted with a permanent magnet cuts the stator winding under the driving of a direct current motor and a wave-shaped symmetrical three phase alternating current voltage comes into being in the stator winding; after being commutated by a commutation loop on a commutation plate, the voltage provides a direct current voltage which has a direct ration linearity relation with the rotating speed of the direct current motor. The utility model has the advantages of small size, low cost, no maintaining and high using efficiency.
Description
Affiliated technical field
The utility model belongs to the electromechanical device technical field, relates to a kind of and the matching used DC tachogenerator of direct current generator.
Background technology
At present, what the direct current generator that China's electromechanics trade is produced was all supporting is the old-fashioned DC generation tachometer that brush is arranged of the eighties development in last century, not only volume is big, cost is high for this class formation tachometer, waste material, and need to regularly replace carbon brush in using and regularly clean carbon dust, otherwise can damage tachometer or influence rate accuracy.This phenomenon has seriously influenced the overall performance and the image appearance of China's motor, has restricted the capacity to earn foreign exchange through exports of China's motor.
The utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, so a kind of novel structure is provided, volume is little, cost is low, Maintenance free and the high brush-less permanent magnetic DC tachogenerator of effective utilization.
The technical solution that adopts is so for achieving the above object: the brush-less permanent magnetic DC tachogenerator that is provided has the closed housing chamber that a pair is made of aluminium alloy system tubular shell and the cooperation of forward and backward Aluminum Alloy Cover, week is provided with the stator core that is inlaid with double-deck short distance winding coil on it in housing, cover is installed with permanent magnet rotor in stator core, the two ends of rotor rotary shaft is bearing on the casing end covers at two sides by forward and backward bearing, one side is provided with cowling panel in the shell chamber, is provided with connection terminal outside housing.Tachometer is in service, under driving, direct current generator cuts off stator coil through the accurate rotor that is inlaid with permanent magnet that calculates with the speed that per minute n changes, to in stator coil, produce the three-phase alternating voltage of waveform symmetry, this voltage through commutating circuit rectification on cowling panel after, the DC voltage of the linear relationship that is directly proportional with DC motor rotation speed is provided.
Compared with prior art, the rare earth permanent-magnetic material (rubidium iron B permanent magnetic material) that the utility model adopts China to have affluent resources is developed into the brush-less permanent magnetic DC tachogenerator, removed the carbon brush that needs periodic replacement and safeguard, simplified manufacturing process, saved material, reduced manufacturing cost, the supporting AC-DC motor of this tachometer can satisfy the requirement of motor speed control device, wherein particularly supporting alternating-current variable frequency motor can be direct-connected between motor and blower fan, this be old-fashioned DC generation tachometer can not accomplish; In addition, this DC velocity measuring also can use as speed control in the automation control system and monitoring element separately.
Description of drawings
Accompanying drawing is the structural representation of an embodiment of the utility model.
Embodiment
Referring to accompanying drawing, brush-less permanent magnetic DC tachogenerator described in the utility model mainly is made up of housing 4, stator core 6, stator coil 5, permanent magnet rotor 3, front end end cover 1, rear end cap 8, front and back bearings 2,7, cowling panel 9, connection terminal 10 etc.For every magnetic and weight reduction, housing 4 and forward and backward end cap 1,8 are all cast with aluminium alloy.Enclosure interior 36 groove stator cores 6 usefulness silicon steel sheets are stamped to form through particular manufacturing craft.Permanent magnet rotor 3 main materials are aluminium alloy, and rubidium iron B permanent magnetic material is embedded on the aluminium-alloy rotor through special process, are divided into six magnetic poles, and magnetic field intensity is relevant with this tachometer output voltage.8 rotor centerings of front end end cover 1 and rear end cap and supporting role.Stator coil 5 usefulness enameled wire coilings form, corresponding to stator core 6 groove numbers, and five grooves of coil spread.For reducing the influence of harmonic wave electromotive force, stator coil 5 is divided into the independent winding that two angles differ 180 °, and its lead-in wire joins with six-phase rectifier circuit, externally exports a DC voltage after rectification.Sealing bearing plays rotation and decides the core effect, in order to guarantee the gap between rotor and the stator core more than 10000 hours serviceable life.
Claims (1)
- A kind of brush-less permanent magnetic DC tachogenerator, it is characterized in that having a pair and cooperate the closed housing chamber that constitutes by aluminium alloy system tubular shell (4) and forward and backward Aluminum Alloy Cover (3,8), in housing (4), be provided with the stator core (6) that is inlaid with double-deck short distance winding coil (5) on it week, cover is installed with permanent magnet rotor (3) in stator core (6), rotor (3) two ends rotary shaft is bearing on the casing end covers at two sides (3,8) by forward and backward bearing (2,7), be provided with cowling panel (9) in shell chamber one side, outside housing, be provided with connection terminal (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218607 CN2602379Y (en) | 2003-03-13 | 2003-03-13 | Permanent-magnet brushless DC tachometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03218607 CN2602379Y (en) | 2003-03-13 | 2003-03-13 | Permanent-magnet brushless DC tachometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2602379Y true CN2602379Y (en) | 2004-02-04 |
Family
ID=34161013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03218607 Expired - Fee Related CN2602379Y (en) | 2003-03-13 | 2003-03-13 | Permanent-magnet brushless DC tachometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2602379Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780971A (en) * | 2020-06-10 | 2020-10-16 | 杭州杰牌传动科技有限公司 | Multi-shaft transmission device fault diagnosis system and method based on rotation speed sensor |
-
2003
- 2003-03-13 CN CN 03218607 patent/CN2602379Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780971A (en) * | 2020-06-10 | 2020-10-16 | 杭州杰牌传动科技有限公司 | Multi-shaft transmission device fault diagnosis system and method based on rotation speed sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1348247A (en) | Double-rotor structural apparatus for motor | |
| CN210111816U (en) | Novel permanent magnet excitation type generator with variable air gap magnetic flux density | |
| CN112152357A (en) | Stator excitation type field modulation motor based on magnetic pole adjusting structure | |
| CN2602379Y (en) | Permanent-magnet brushless DC tachometer | |
| CN201130876Y (en) | Permanent magnetism brushless wheel motor for electric automobile | |
| CN210380608U (en) | Claw-pole permanent magnet synchronous motor | |
| CN210898664U (en) | Motor for 12-slot 8-pole electric compressor | |
| CN202034842U (en) | Permanent magnet synchronous servo motor for elevator | |
| CN208904788U (en) | Rotor brushless energy-saving motor is superimposed outside permanent magnetism | |
| CN108429421B (en) | Mixed excitation motor for new energy automobile | |
| CN211039110U (en) | Single-phase brushless direct current electric fan | |
| CN2309663Y (en) | High-efficiency rare-earth permanent-magnetic brushless dc electric machine | |
| CN2578571Y (en) | Water pump-generator | |
| CN217984712U (en) | Rotor structure of permanent magnet synchronous motor | |
| CN2170597Y (en) | Electric machine without reverser | |
| CN212250530U (en) | Industrial fan of outer rotor permanent magnet motor | |
| CN210744861U (en) | Column type coreless motor | |
| CN2031174U (en) | Dc motor without commutator | |
| CN117394628B (en) | Disk type transverse magnetic flux reluctance motor | |
| CN2560155Y (en) | Plate type permanent magnetic brushless electric machine | |
| CN2274837Y (en) | Structure of rotor of permanent megnet synchronous motor | |
| CN219918538U (en) | Generator for electric vehicle | |
| CN211296358U (en) | Biaxial tangential flux motor | |
| CN2497476Y (en) | Electric motor double-rotor structure apparatus | |
| CN210490700U (en) | Novel permanent magnet brushless direct current motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |