| 摘要 |
A work generating device (10; 33) comprises a movable working part (12; 35) which is driven by an electric motor (11) and which during a working cycle has a varying need of torque including at least one maximum value. The motor (11) is an electronically controlled reluctance motor having stator poles (21, 22; 23, 24) which are provided with windings (25), and rotor poles (26a, 26b) which cooperate with the stator poles and which are arranged on a rotor (26) made from soft magnetic material. The motor (11) is connected to the working part (12; 35) in such a way that one of the rotor positions where the pulsating torque of the motor has a maximum value coincides with the position of the working part in which the need of torque is at a maximum. |
