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).
Test procedure sheet for motors, detailing five different test scenarios and power calculation formulas.
| Identifier | ExFiles\Box 61b\3\ scan0167 | |
| Date | 28th April 1925 | |
| H573 - 86027 28.4.25. X.543. MOTOR TESTS. Quantities:- Volts. Amps. Speed. Torque. \ / \ / E.H.P. B.H.P. \ / Efficiency. (1) Run motor as separately excited dynamo on open circuit. Find flux - ex. current curve. (2) Run motor light (const. torque). Find how amps. and speed vary with volts. (3) Motor crawling. Find how torque varies with amperes. (Note armature and field resistances). (4) Motor run at one constant speed. Find variation of torque with amperes at 1500 r.p.m. (5) Motor run loaded with drooping volts. Find variation of amperes, speed, etc. with torque. (Ordinary brake test). NOTE:- E.H.P. = .001340 VA B.H.P. = .00001587 ST EFC. | ||