Abstract: A unit of series-connected semiconductor elements includes a cylindrical metal case with a clamping mechanism enclosed therein. A chain of semiconductor elements is arranged between the surfaces of clamping elements of the clamping mechanism coaxially with the case. One extreme semiconductor element of the chain contacts the bottom of the case made of a current-conducting material, functioning as one clamping element of the clamping mechanism. The second extreme semiconductor element of the chain contacts the second clamping element of the clamping mechanism, made of an insulation material and mechanically coupled with the side walls of the case.The unit also contains current-carrying busbars electrically associated with the outputs of the extreme semiconductor elements of the chain, one of the current-carrying busbars being electrically connected with the upper part of the side wall of the case.

Abstract: A device for power supply of gas-cleaning electrical precipitators comprises two constant voltage sources (1,2), the unlike poles (5,6) of each of the sources being grounded. Two high-voltage commutators made as triode-type thermionic rectifiers (7,8) with a hollow anode (11) are connected between the other unlike poles of each of the constant voltage sources (1,2) and a corona displaying electrode (16) of an electrical precipitator (17). Connected to a cathode (9) and a control electrode (10) of each of the triode-type thermionic rectifiers (7,8) are modulators (18, 19) of alternating polarity voltage which are connected through isolation transformers (38,39) to a control unit (40), the latter being connected to pickups (49,50,51,52) of electrical and physical parameters.

Abstract: A magnetic system comprises a frame with at least one coil arranged coaxially thereon and providing for the setting-up of a magnetic field, and a cooling system. Wound in layers on a former of each coil are conducting and insulating tapes encompassed by a serving on an outer surface. Means for circulating coolant are disposed in close proximity to end surfaces of the coils, a gap being provided to allow flow of said coolant between the end surface of the coils and said means. The end surfaces of the coils are formed substantially by extremities of the conducting and insulating tapes.