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).
Conclusions and test procedures for a dynamo-battery circuit.
| Identifier | ExFiles\Box 82\4\ scan0033 | |
| Date | 26th November 1934 | |
| -2- (3) To what extent the standard regulator is satisfactory in dealing with the load, and whether a larger output one is necessary. (4) The conditions of, state of battery charge, and load on the system to cause the battery to cease discharging and float on the system. (5) What danger, if any, the dynamo runs of being overheated. Conclusions. (1) The volt drop in the cables, and across the cutout, is considerable and should be reduced if possible. (2) A reduction in the volts dropped on the circuit would improve the regulation of the system, and increase protection of the dynamo and battery. (3) From the point of view of load, and keeping the battery charged, the present regulator is not sufficient, and a larger one appears necessary. (4) From the point of view of dynamo taking all load off the battery when the latter reaches a partially discharged state, a much large regulator is necessary. Test Procedure and results. The bench tests were carried out on a standard Bentley dynamo - battery circuit. The circuit was made as complete as possible, using a standard battery, standard lengths and sizes of cables, and standard unit including regulator BZhl or BZGFl, distribution board, ammeter and switchbox. Tests were made with loads of approximately 5, 10, 15, 20, 25 and 30 amperes and with the battery in various states of charge approximating to 100%, 75%, 50%, 25% charge, and fully discharged. Readings of P.D. were taken between various points round the circuit and 'earth'. | ||