(19)

(11)

EP 0 087 415 A1

(12)

(43) Date of publication: 07.09.1983 Bulletin 1983/36 (21) Application number: 81902630.0 (22) Date of filing: 08.09.1981

(51) International Patent Classification (IPC):  H02M 7/ 515( . ) H02P 27/ 06( . ) (86) International application number: PCT/GB1981/000183 (87) International publication number: WO 1983/000957 (17.03.1983 Gazette 1983/07)

(84) Designated Contracting States: CH DE FR LI NL SE (71) Applicant: TASC Drives Limited Cambridge CB2 1LQ (GB)	(72) Inventors: RAY, William Frederick Attenborough Nottinghamshire (GB) DAVIS, Rex Mountford Loughborough Leicestershire (GB) (74) Representative: Arthur, George Fitzgerald, et al  KILBURN & STRODE 30, John Street London WC1N 2DD London WC1N 2DD (GB)