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).
Design specifications and experimental aims for a plain shunt wound machine with vibrator control.
| Identifier | ExFiles\Box 68\4\ scan0208 | |
| Date | 23th March 1920 | |
| Contd. -3- EFC4/T23.3.20. It will be understood that the machine is intended to be a plain shunt wound machine and ultimately intended to be used with vibrator control. What we want to find out at the moment is what we can do experimentally in the way of cutting in speeds and output as a shunt machine without overheating. We shall probably experimentally use this machine together with a vibrator control of the Bijur type which we have in readiness. We are aiming at a pole flux of 200,000 lines giving a flux density in the air gap of approximately 6,250 lines per sq. cm. The armature slots are to be milled skewed and the pole piece ends tapered off so as to reduce the winging noise to the greatest extent. This is the reason also for using a large number of slots with the coils grouped one coil per slot. We attach copy of R6/G23.3.20 just received, from which you will be able to obtain further particulars of the construction required. EFC. | ||