GB595418A - Improvements in or relating to systems for continuously measuring the power output of a rotating shaft - Google Patents
Improvements in or relating to systems for continuously measuring the power output of a rotating shaftInfo
- Publication number
- GB595418A GB595418A GB2132/45A GB213245A GB595418A GB 595418 A GB595418 A GB 595418A GB 2132/45 A GB2132/45 A GB 2132/45A GB 213245 A GB213245 A GB 213245A GB 595418 A GB595418 A GB 595418A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- voltage
- rotor assembly
- air gaps
- power output
- 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
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/105—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving inductive means
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
595,418. Dynamometers. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. Jan. 26, 1945, No. 2132. Convention date, Nov. 19, 1942. [Class 106 (ii)] , [Also in Group XXXVIII] A system for continuously measuring the power output of a rotating shaft comprises a rotor assembly secured to rotate with the shaft, a stationary member disposed in close proximity to the rotor assembly, electrical coil means associated with said stationary member, means for producing a potential varying in magnitude with the speed of rotation of the shaft for energizing said electrical coil means which arc in flux linkage with said stationary member and said rotor assembly upon energization thereof, means included in the rotor assembly for changing the value of the flux linkage by an amount corresponding to the torque of said shaft thereby changing the value of a voltage in said electrical coil means, and means for measuring the voltage in said coil means, whereby the power output of said shaft is indicatecl. A rotor assembly 3 comprises a pair of axially spaced torque rings 7 and 9 and a reference ring 11 secured on non-magnetic bushings to a shaft 1, the power output of which is to be measured. Each of the torque rings 7 and 9 has a plurality of axially extending fingers 15, 17 which are of sufficient length to overlap the extremities of axial fingers 13 on the reference ring 11 forming small air gaps 19 and 21 as shown. When the shaft 1 is transmitting torque the size of the air gaps 19 9 and 21 will change due to torsional deflection of the shaft, the air gaps- 19 increasing and the air gaps 21 decreasing or vice versa depending on the direction of twist of the shaft. The rotor assembly 3 co-operates with a stator member 5 comprising an outer annular shell 23 having secured therewithin axially spaced ring elements 25, 27, 29 positioned to form air gaps 31, 33 and 35 respectively with the rotor assembly 3. A pair of annular coils 37 and 39 'are positioned within said ring elements 25, 27, 29 as shown and are energized with a voltage produced by a generator 45 which is driven by the shaft in any convenient manner. An inverter 44 converts the D.C. voltage of generator 45 to A.C. to energize the coils 37 and 39, which are each connected as one leg in a conventional bridge circuit which is balanced for the condition of no load on the shaft 1, and creates a flux across the air gaps 31, 33, 35 and 19, 21. When the shaft 1 is transmitting a load the voltage in the coils 37, 39, which is proportional to the speed of the shaft 1 since the generator 45 is driven by the shaft, is varied by reason of the change in the air gaps 19 and 21, previously explained, causing the flux in the path round the coils (see Figure) to be changed to vary the voltage in the coils proportionally to the speed and torque. This change in voltage is measured so giving a measure of the power output of the shaft.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US595418XA | 1942-11-19 | 1942-11-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB595418A true GB595418A (en) | 1947-12-04 |
Family
ID=22023637
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2132/45A Expired GB595418A (en) | 1942-11-19 | 1945-01-26 | Improvements in or relating to systems for continuously measuring the power output of a rotating shaft |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB595418A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2234827A (en) * | 1989-08-11 | 1991-02-13 | John Kirby | Method and apparatus for measuring vehicle power |
US5215154A (en) * | 1988-08-23 | 1993-06-01 | John Kirby | Method and apparatus for measuring vehicle weight or engine power or both |
-
1945
- 1945-01-26 GB GB2132/45A patent/GB595418A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5215154A (en) * | 1988-08-23 | 1993-06-01 | John Kirby | Method and apparatus for measuring vehicle weight or engine power or both |
GB2234827A (en) * | 1989-08-11 | 1991-02-13 | John Kirby | Method and apparatus for measuring vehicle power |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2796542A (en) | Dynamo-electric machine | |
US3974408A (en) | Asynchronous synchronizable magnetic coupling | |
US2432900A (en) | Electrical dynamometer | |
US2516114A (en) | Alternator | |
US2387901A (en) | Slip indicator | |
US2615069A (en) | Electric motor construction | |
US2365565A (en) | Power measuring system for rotating shafts | |
US2346976A (en) | Torque measuring device | |
GB969914A (en) | An alternating current generator | |
GB595418A (en) | Improvements in or relating to systems for continuously measuring the power output of a rotating shaft | |
US3179825A (en) | Inductor alternator having a salient pole stator construction | |
US2756357A (en) | Dynamoelectric device | |
US2898486A (en) | Speed responsive generators | |
US3553512A (en) | Single phase motor | |
GB1478868A (en) | Radial active magnetic bearing | |
GB715621A (en) | Improvements in reproducing servo-mechanisms | |
US3235759A (en) | Constant speed drives | |
US2459171A (en) | Torque measuring device for shafts | |
GB578859A (en) | Improvements in or relating to power indicating or measuring devices | |
US4563905A (en) | Shaft torquemeter | |
JPS6318428B2 (en) | ||
GB578860A (en) | Improvements in or relating to torque indicating or measuring devices | |
US2516380A (en) | Alternating current generator | |
US2467738A (en) | Strain responsive device | |
GB579451A (en) | Improvements in or relating to apparatus for indicating or measuring the thrust of a shaft |