LINEAR ELECTRIC MOTOR Russian patent published in 1996 - IPC

FIELD: controlled electric drives such as actuating elements of working mechanisms. SUBSTANCE: electric motor has runner 1 mounted in bearings 2 and rigidly coupled with table 3. Abutting runner is holding electromagnet 4 with coil 5 connected to spacers 6 which bring holding magnet 4 out to same level as that of intermediate magnet 7 with coil 8. Developed yoke of magnet 7 has rectangular bore accommodating two traction magnets with three-legged magnetic circuit 9 whose symmetry axis coincides with axes of coils 5 and 8 of holding magnet 4 and intermediate magnet 7. Magnetic circuit 9 is set on mount 10 and has coil 11 labelled FORWARD and coil 12 labelled REVERSE. Equal air gaps are provided between pole ends of magnetic circuit 9 and opposing members of developed yoke of magnet 7 resting on cushions 13. Shafts of brake magnets whose armatures hold brake blocks tight against runner 1 by means of disk springs are installed perpendicular to axes of coils 5,8,11,12 of holding, intermediate, magnetic-circuit and traction magnets, 4,7,9,14, respectively. Magnetic circuit 9 and magnetic circuits of holding magnet 4 and intermediate magnet 7 are laminated. EFFECT: improved design. 5 dwg