PERMANENT-MAGNET TORQUE MOTOR Russian patent published in 1999 - IPC

FIELD: electric drives. SUBSTANCE: magnet is provided with additional magnets abutting against ends of extreme magnets. Magnetic cores are mounted in bearings of stator hollow shaft. Alternating with magnets are electric blocks that have plate and heat sink whose slots accommodate coil sections and rotor position detectors. All magnets are installed in shells joined together and to magnets to form toroidal gaps for receiving electric blocks. Alternating magnetic fields are opposing each other. Leads of rotor position detectors and those of coil sections in rows of electric blocks are connected in series, in parallel or in series- and-parallel; they are connected through holes in hollow shaft to power supply and to control unit. Coils may be wound of insulated strips and made of electricity conducting nonretentive material. EFFECT: reduced size and improved reliability of motor due to high specific power and low thrusts on its bearings. 2 cl, 5 dwg