ES341836A1 - Improvements in and relating to tachogenerators - Google Patents
Improvements in and relating to tachogeneratorsInfo
- Publication number
- ES341836A1 ES341836A1 ES341836A ES341836A ES341836A1 ES 341836 A1 ES341836 A1 ES 341836A1 ES 341836 A ES341836 A ES 341836A ES 341836 A ES341836 A ES 341836A ES 341836 A1 ES341836 A1 ES 341836A1
- Authority
- ES
- Spain
- Prior art keywords
- magnetized
- coil
- rotor
- areas
- revolution
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Stepping Motors (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Distances Traversed On The Ground (AREA)
Abstract
A tachogenerator, e.g. for a motor vehicle, comprises a stator 9, Fig.1 of insulating material mounted on a fixed shaft 4 and provided on its periphery with a printed or wire coil 3 or (11), Fig.2 (not shown). The rotor is formed by at least one disc 2 of magnetizable material provided with axially magnetized areas, Figs. 3a, 3b (not shown), around its periphery. As the rotor rotates the coil cuts across the magnetic fields between the magnetized areas and a corresponding annular member (10, 8 of magnetizable material which latter may also be provided with correspondingly located magnetized areas. Pulses are thus generated in the coil 3 or (11), whose repetition frequency is proportional to the speed of rotation of the shaft and which are fed to an appropriately calibrated matter 7. To provide a D.C. Output the areas on each stator are magnetized in the same direction, Fig. 3a (not shown). To provide an A.C. output adjacent areas are magnetized in opposite directions, Fig. 3b (not shown). To measure the number of revolutions performed, indicative of the distance travelled by the vehicle, as well as the speed of revolution, using a rotor of the type shown in Fig. 3a, one area of the rotor is magnetized in the opposite direction to the rest, Fig.4 (not shown), to provide one pulse per revolution of opposite polarity. The output from the coil 3 or (11) is then supplied to the bases of two transistors 14, 15, Fig. 5, one 14, which conducts when a positive pulse is applied and the other 15 when a negative pulse is applied to the base. A voltmeter 7 indicating speed of revolution and an electromagnetic counter or stepping motor and counter indicating the number of revolutions performed are connected in the emitter, collector circuits of the transistors respectively. Alternatively two separate systems of magnetized areas, radially displaced, each with its associated pick-up coil may be used to measure speed of revolution and number of revolutions independently. In a further embodiment a magnet (19), Fig. 6 (not shown) mounted on the end of a pivotal arm co-operating with a cam (23) is moved radially once per revolution of the rotor to produce a pulse in an associated coil (21) on the stator. In this embodiment the two systems are again independent.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER0045306 | 1967-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES341836A1 true ES341836A1 (en) | 1968-07-01 |
Family
ID=7407585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES341836A Expired ES341836A1 (en) | 1967-02-17 | 1967-06-15 | Improvements in and relating to tachogenerators |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE1673422A1 (en) |
| ES (1) | ES341836A1 (en) |
| FR (1) | FR1535583A (en) |
| GB (1) | GB1132949A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3918166A1 (en) * | 1989-06-03 | 1990-12-13 | Gerd Schlueter | POWER SUPPLY DEVICE FOR BICYCLES OR THE LIKE |
| NL9200515A (en) * | 1992-03-20 | 1993-10-18 | Philips Nv | ELECTRIC MACHINE, METHOD FOR ATTACHING A SOFT MAGNETIC BODY AND A HARD MAGNETIC BODY TOGETHER AND METHOD FOR ATTACHING TWO HARD MAGNETIC BODIES TOGETHER. |
| DE10130130B4 (en) | 2001-06-22 | 2007-09-20 | Minebea Co., Ltd. | Device for generating a speed-dependent signal for an electric motor, in particular for an electronically commutated DC motor |
-
1967
- 1967-02-17 DE DE19671673422 patent/DE1673422A1/en active Pending
- 1967-06-15 ES ES341836A patent/ES341836A1/en not_active Expired
- 1967-06-23 FR FR13021900A patent/FR1535583A/en not_active Expired
- 1967-09-18 GB GB4235367A patent/GB1132949A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1132949A (en) | 1968-11-06 |
| DE1673422A1 (en) | 1971-05-27 |
| FR1535583A (en) | 1968-08-09 |
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