Permanent magnet synchronous motor to drive propellant pump

The paper presents problems investigated by Mikroma in the project “In Space Propulsion”, realized within 7^th Framework Programme financed by the European Union. The investigation concerns elaboration of an electric motor to drive a fuel pump in the new concept of cryogenic rocket propulsion with small thrust force. The problems related to elaboration of the motor suited to work in cryogenic conditions are discussed. Chosen results of investigation of the influence of cryogenic temperature on the properties of manufacturing materials of the motor are shown. Moreover, results of laboratory tests of constructed prototype motors are presented.