| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress a measurement error and to highly precisely detect an operation state by proving two magnetic sensors in the different positions of the output shaft direction of a basket-type induction motor. SOLUTION: A front side magnetic sensor A is installed on a front side detached from a center part by a prescribed distance by setting an arbitrary part in a shaft direction, a middle part, if possible, to be the center part, along the direction of the output shaft 3 of an induction motor 1, and a back side magnetic sensor B at a back side detached from the center part by a prescribed distance. When the induction motor 1 is operated, magnetic flux leaks to an outer part from an outer case 2. Thus, the front side/back side magnetic sensors A and B detect magnetic flux leaking to outside and output corresponding electric signals to a device main body 4. The device main body 4 displays the torque of the induction motor 1 by the torque display part 5 of a front panel and displays the rotary direction of the induction motor 1 by a rotary direction display part 6. Thus, it is not necessary to install a torque sensor to the output shaft as in a former way, a measurement error owing to a temperature rise in the induction motor is eliminated and an operation state can highly precisely be detected.</p> |
