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 dynamo-battery charging system, addressing charging rates and potential voltage gradients, complete with a circuit diagram.
| Identifier | ExFiles\Box 164\3\ img105 | |
| Date | 7th January 1938 | |
| -2- would aggravate the trouble in group (3). But we have evidence in Mr. Minchin's statement that batteries on the whole, are far from being overcharged, and when overcharging does occur, it is less serious than undercharging. From these considerations and from tests that we have carried out on various cars, we conclude that there would be little danger in increasing the charging rate, while at the same time it would be of considerable benefit. The charging rate was increased some time ago when we adopted the present C.J.1 type of regulator in place of the H1 type. The suggestion of further increase however raises points which effect the whole of the dynamo-battery system. This system comprising a dynamo, regulator, various circuit conductors and units and the battery itself, which is supposed to keep the battery in a charged and healthy condition, under the diverse conditions of use, is based on a number of compromises. From tests, recently carried out on a number of cars, it was found that the potential gradient along the circuit was rather steeper than was expected, and as indicated in the diagram. DIAGRAM TEXT: Voltage Readings: 15.1V, 14.6, 14.5, 14.3, 14.1V, 14.0V, 13.8V Components: DYNAMO, REGULATOR, CUTOUT, AMMETER, BATTERY Labels: +, -, CHASSIS FRAME | ||