From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Readings and observations for a variable frequency induction motor transformer with a three-phase stator to single-phase rotor.
| Identifier | ExFiles\Box 32\4\ Scan065 | |
| Date | 29th October 1929 | |
| V1581? 29.10.29. VARIABLE FREQUENCY INDUCTION MOTOR TRANSFORMER THREE PHASE STATOR TO SINGLE PHASE ROTOR. Readings taken with rotor at rest. Rotor. Stator. Amperes. Volts. Watts. Average Amperes. o 28.0 o 1.34 x 4 5.36 11.0 26.5 291.5 1.36 x 4 5.44 22.0 25.2 554.5 1.48 x 4 5.92 29.5 24.2 714.0 1.54 x 4 6.16 38.0 23.2 882.0 1.70 x 4 6.80 50.0 21.9 1,095 1.93 x 4 7.72 57.0 21.2 1,207 2.05 x 4 8.20 Stator resistance between any pair of terminals = .69 ohm. Rotor resistance = .30 ohm between terminals but windings only .025 ohm. Observations made after warming machine by loading rotor for 1 1/4 hrs. at 30 amperes. Rotor was finally loaded up to 60 amperes approx. for 15 mins. Slip rings were found to get very hot, and connections from coils to slip rings fairly hot. EFC. | ||