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).
Description of external voltage and current regulators for chassis dynamos, comparing pre-war and post-war R. Bosch systems.
| Identifier | WestWitteringFiles\J\November1922\ Scan84 | |
| Date | 16th November 1922 | |
| TO R & E.. from EFC. c. CJ. & PN.{Mr Northey} c. Ey. & EP.{G. Eric Platford - Chief Quality Engineer} c. Eg. & Ds. X.1402 - EXTERNAL VOLTAGE AND CURRENT REGULATORS FOR CHASSIS DYNAMOS. We should have said that the R.{Sir Henry Royce} Bosch dynamo and regulator diagrammatically described in our EFC1/T14.11.22 referred to the pre-war type. We now attach diagram of post-war R.{Sir Henry Royce} Bosch dynamo and regulator connections which are slightly different. The regulator in this instance is housed in the dynamo casing at the commutator end (so also is the cutout). Examination of the diagram will show that in principle the arrangement is nearly identical. The description is as follows :- The variable resistance in series with the dynamo field is composed of a fixed metallic wire resistance shunted by the varying contact of two carbon blocks, the pressure between which is actuated by the two operating coils. There is a principal operating coil across the voltage, also a series coil of a few turns conveying the main load current. There is no top limit to the regulation because after the first pair of carbon contacts have ceased to function, a second pair (see diagram) comes into action which causes the main field of the dynamo to be shunted by the series operating coil. The differences between this and the pre-war system are :- Contd. | ||