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).
Performance comparison against a post-war R. Bosch machine and a description of a three-component Regulator Unit.
| Identifier | ExFiles\Box 50\1\ Scan234 | |
| Date | 1st June 1923 | |
| Contd. -4- EFCL/T12. 6.23. The performance in these respects, i.e. (c) and (d), is somewhat less good than that of the post-war R.{Sir Henry Royce} Bosch machine. For the sake of easy comparison we give curves showing comparative performances of this machine, used as a shunt wound machine, with those of other shunt wound machines. As regards the other machines, these are curves which have been previously issued. Regulator Unit. This unit consists of three components compactly arranged together in such a way that the whole unit may be housed inside the commutator end cover on the opposite side from the brushes (there being two sets only of brushes at 90°). The three components of the unit are:- (1) The regulator, operating the vibratory contacts. (2) " main cutout. (3) " auxiliary relay, the function of which in a general way may be considered to be to change the operation of the system from constant current regulation to constant voltage regulation. A diagram of the inter-connections of these components and the connections of the unit to the dynamo and external circuit is given by the attached blueprint. The switches operated by the cutout and auxiliary relay are simply indicated diagrammatically on the blueprint. Each of the floating contacts consists of two dished circular pieces arranged back to back. The action of the whole apparatus is somewhat complicated, and unnecessarily so we think, and the performance does not seem to be as satisfactory as that of the R.{Sir Henry Royce} Bosch | ||