Patent GB-190824643-A (GB)
Title: Improvements in Arrangements for Charging and Discharging Electric Accumulators.
Inventor: TAYLOR ALFRED MILLS
IPC: H02J7/00
Filed: 1908-11-17
Granted: 1910-02-17
Abstract: 24,643. Taylor, A. M. Nov. 17. [Cognate Applications No. 24,643, A.D. 1908, dated Nov. 17, No. 1959, A.D: 1909, dated Jan. 27, No. 9666, A.D. 1909, dated April 23, No. 10,913, A.D. 1909, dated May 8, No. 11,958, A.D. 1909, dated May 21, No. 13,250, A.D. 1909, dated June 7, and No. 13,701, A.D. 1909, dated June 11.] Distributing.- The size of battery boosters at the substations of alternating and direct current systems is reduced by adapting their armature and field windings to be connected in series on charge and parallel on discharge ; by employing more than the required number of cells to float on the system, and a smaller booster enabling them to float on the system; or upon a three-wire system by varying the number. of cells by a switch connected to the middle wire of the system. In the arrangement shown in Fig. 1, one side A of a three-wire system is provided with connexions for placing the armature and field windings of a booster across the positive lead C and neutral lead D. The two armature windings F, G are connected either in series or parallel by a switch T, while the field windings I, J are connected in parallel across the leads C, D by switches R, S connected to an automatically-operated shortcircuiting switch U. To protect the boosters upon the occurrence of an overload on the system, the switches R, S are arranged to close-circuit the fields I, J through inductive resistances i, j. In the arrangement shown in Fig. V, the armature windings F, G are varied in connexion across the bus-bars K, L by means of a switch T, the contacts of which are so arranged that the circuit of windings F, G is never broken, while a resistance Z is inserted during the operation of the switch. The field windings I, J are connected in series or parallel by means of a switch RR having the same action as the switch T, while the fields W<1>, W<2> are similarly arranged by means of a switch SS. In the arrangement shown in Fig. II, booster bus-bars K, L for one side of a three-wire system, and bus-bars M, N for the other side, are shown. The booster is provided with separate cores, each of which has two windings F, G and O, P respectively under separate fields I, J. The armature windings F, O are placed in series or parallel across the bus-bars K, L by means of a switch T<1>, while the armature windings G, P are placed in series or parallel across the bus-bars by means of a switch T<2>. The traction system shown in Fig. III is provided with a booster having two separate armature cores and two field winoings. The armature F under one field is arranged to be connected in series with the armature O, while the armature G is similarly arranged with respect to the armature P. When a single core with two windings is employed, one of the windings only engages with an auxiliary field winding of the booster. In the tbree-wire system shown in Fig. VI, a switch A A connected to the neutral wire D is arranged to vary the connexion of the neutral wire D with the middle cells of the battery. When the number of cells in the battery is increased above the number required to float on the system, an auxiliary booster e, Fig. I, in series with a protecting choking-coil l, is employed for the purpose of enabling the battery to float upon the line without running the large booster. The booster e may be used to perform the function of a booster a which runs in conjunction with the main booster to give the battery its final charge.