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 a voltage regulator's operation, including charging an accumulator and managing high-demand electrical devices.
| Identifier | ExFiles\Box 31\1\ Scan108 | |
| Date | 10th December 1920 guessed | |
| -3- Contd. This voltage regulator is adjusted to come into operation at 16 volts. The result is an arrangement whereby the dynamo output is controlled entirely by the demagnetising action of the series winding until the voltage rises to 16, beyond which value an appreciable increase in voltage, and hence of current, is not possible as the voltage regulator comes into action. In practice, when the dynamo is charging the accumulator, the series winding limits the current until charging is nearly complete, when the E.M.F. of the accumulator commences to rise rapidly and soon brings the voltage regulator into operation. This results in a gradual diminuation of the charging current. By this means, the accumulator is fairly rapidly re-charged, but over charging is prevented. In addition to the arrangement for limiting the output in accordance with the requirements of the accumulator, another control is introduced. It is frequently desired to use powerful headlamps, or some other devices, such as electrically heated gloves, etc. which require a large current for their operation. This may result in the energy withdrawn from the accumulator exceeding that supplied to it by the dynamo, which is undesirable, as, sooner or later, the excessive demand will completely discharge the accumulator. In order to overcome this defect, a tapping is led off from a point on the series winding and the circuits, whose demands are great, are supplied from this lead. The effect Contd. | ||