MULTIPOLE STEPPING MOTOR Russian patent published in 1994 - IPC

FIELD: electrical engineering. SUBSTANCE: multipole stepping motor has magnetized rotor with alternating N and S poles distributed along its periphery magnetized in parallel to its axis. They are positioned on one of its side opposite to pole pieces. Each of pole pieces has concave internal edge provided with teeth separated with teeth of intermediate pole piece. Core which carries coil connects pole pieces with coil. Pitch α_s of teeth of pole pieces differs from pitch α_r of poles of rotors. EFFECT: enhanced accuracy and reliability. 5 cl, 11 dwg