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).
The combined operation of pre-war and post-war Bosch dynamo and regulator systems.
| Identifier | WestWitteringFiles\F\February1921\ Scan98 | |
| Date | 14th February 1921 | |
| To R.{Sir Henry Royce} & E.{Mr Elliott - Chief Engineer} from EFC. c. CJ. & PN.{Mr Northey} c. Bn.{W.O. Bentley / Mr Barrington} & By.{R.W. Bailey - Chief Engineer} c. Da.{Bernard Day - Chassis Design} & EP.{G. Eric Platford - Chief Quality Engineer} c. EWl. for R.R. Inc. ORIGINAL EFC2/T14.2.21. X.3796 - PRE-WAR BOSCH REGULATOR. X.796 Further to our EFC1/T21.1.21, we report below on the combined operation of the pre-War Bosch dynamo and regulator. We have received your note R1C/C9.2.21 with regard to postponing work on vibrator regulators for the present, but as the results now reported were obtained previous to this, we think it better to record these whilst in our minds. We have been looking into the post-war Bosch lighting system (upon which we are shortly reporting) and this has suggested to us the correct function of the insulated ring in the regulator of which we spoke in our previous report. On the post-war Bosch system it appears that voltage regulation over the first portion of the range of speed is carried out in the usual way by a vibrating contact, shunted by a resistance, and in series with the field circuit, operated by a plain shunt wound coil. When the speed attains a certain figure, the regulation is then produced at another contact at the other end, which contact short circuits the field winding of the dynamo and so still further keeps the excitation down. in such a way that there is no top limit of speed to the range of control. We think that the insulating ring, spoken of and connected as shown in our diagram, is intended for this purpose, the movable armature of the regulator coming into contact with Contd. | ||