| 摘要 |
PURPOSE:To protect a resistor material form thermal breakdown, by mounting a conductive coupling member between the resistor material for shortcircuiting a plurality of rotor cores and a conductor placed between the rotor cores. CONSTITUTION:Conductors 5 in rotor cores 2, 3 mounted on a rotor shaft 4 with a predetermined interval are coupled in series and shortcircuited through a resistor material (r) formed into an annular body, thus forming a rotor 8. The resistor material (r) and the conductor 5 are coupled through a conductive coupling member 42 at a non-magnetic core section 9 arranged between the rotor cores 2, 3. On the other hand, stators 24, 25 are juxtaposed on the inner wall face of a machine frame 14 while facing with the rotor cores 2, 3. The stator 25 is rotatable relatively to the fixed stator 24, and the torque of motor is controlled through control of relative phase. By such arrangement, the resistor material can be protected from thermal damage or breakdown. |
