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).
Continued discussion on refining a battery charging system, detailing modifications requested by Mr. Royce.
Identifier | ExFiles\Box 59\1\ Scan336 | |
Date | 27th October 1927 guessed | |
-4- Contd. did not appear to be any difficulty in getting the device to act with sufficient accuracy. At this time, as referred to in our EFCl/T3.6.27, Mr. Royce asked for a larger reduction in the charge than we had originally allowed for. We agreed as to the advantage of going further than we had already done in reducing the rate of charge, saying at the same time that it would probably be found an advantage to increase the voltage figure at which the charging switch operated, so that there would be no doubt of the battery receiving a good charge before the auto switch came into play, then when it did, only to be considered as a trickle charge. In the first instance we foubled the amount of resistance in the field winding and proved that dynamo commutation in these circumstances was satisfactory. Mr. Royce then indicated that he wished the device to act so as to cut off the dynamo charge practically completely, the charge not to come on again until the charging switch had been brought to the off position. This latter, of course, was already provided for by the fact that we had connected the negative end of the shunt operating coil to the battery side of the cutout. We wrote a report EFCl/T25.10.27 in which we considered the relative merits of the various ways in which (1) A voltmeter, (2) A danger lamp unit (like our present green lamp switch unit) might be connected. | ||