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 the functioning of the dynamo-battery combination in a chassis, focusing on the self-regulated type dynamo.
| Identifier | ExFiles\Box 61\2\ scan0241 | |
| Date | 4th September 1926 | |
| X3374 EFC5/T1.4.9.26. THE FUNCTIONING OF THE DYNAMO BATTERY COMBINATION OF A CHASSIS. (SELF REGULATED TYPE DYNAMO). Our chassis are provided each with a dynamo-battery combination for maintaining the required supply of electrical energy, of which the dynamo is one of the so-called self-regulated types. There are several variations of such machines as regards the arrangement of the windings, brushes, etc.; but speaking generally they all depend upon the same root principles and have mainly similar characteristics. Though so named, they are not really self-regulated, depending as they do for effective control at varying speeds upon their being electrically soundly connected to the battery. Thus in reality it is the dynamo-battery combination which is self-regulated and in fact it may be said that it is the battery which brings about the main regulating action. In order that this regulating action shall be possible such dynamos must be working, over the regulating range, in a manner which necessitates a simultaneous rise or fall of their terminal voltage and ampere output. That is to say, with any changes made in the external circuit the voltage and ampere output of the machine must go up or down together. We cannot have the desired condition in which the ampere output can go down when the terminal voltage goes up. Without going into a detailed explanation of the internal regulating action of the machine, we may state that the condition of working is entirely different from that of a plain shunt wound machine working normally (and more Handwritten notes: X8780 X294 | ||