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).
Outlining the principles for designing an external voltage regulator for a dynamo, considering speed and temperature.
| Identifier | WestWitteringFiles\F\February1921\ Scan73 | |
| Date | 2nd February 1921 | |
| Contd. X.H148 -6- EFC1/T2.2.21. In investigating any form of external regulator control, we set out with the idea of finding how the open circuit regulated voltage depends upon, firstly, speed and secondly, temperature. The main compounding coil having little or no effect in this case, the aim should be first to evolve a system in which the voltage is the same for all conditions of speed and temperature. It would then be found that when set to operate on a battery in a given condition, e.g. fully charged, the current delivered to the battery would likewise be the same for all conditions of temperature and speed within the regulating range, and can be made suitably small for the fully charged condition by suitable adjustment. Beyond this point, the amount of compounding would then have to be chosen to suitably limit the dynamo output with the battery in a very low condition. These are the lines on which we propose to work in arranging such a control for any R,R.{Sir Henry Royce} dynamo. EFC. | ||