| 摘要 |
<p>A permanent magnet machine (PMM) has a kinetic portion (12) electrically coupled to a power conversion portion (14). Motive power is provided to the kinetic portion (12) by a torque applied to a motive shaft coupled to a prime mover, such as an aircraft engine or an automobile engine. A control circuit includes a switch (40) disposed between the kinetic portion (12) and output feeder cables of the power conversion portion. A first sensor (50) is effective to detect a first fault condition in either the feeder cables or the power conversion portion (14) and a second sensor (54) is effective to detect a second fault condition in the kinetic energy portion (12). The first sensor (50) is effective to open the switch (40) when a first fault condition is detected and the second sensor (54) is effective to apply a voltage to a winding (26a, 26b, 26c) within the kinetic portion (12) generating an opposing counter torque on the motive shaft where a combination of torque and counter torque exceeds a fracture yield strength of said motive shaft causing it to fracture. The second fault condition is then rendered safe while the prime mover may continue normal operation. (Drawing Figure 3)</p> |
