| 摘要 |
<p>PURPOSE:To reduce a weight, a size and a cost in utilization of a variable geared motor by composing a reduction gear in a two-stage type, and suppressing a speed ratio (i) to a range for satisfying i<=N when a maximum reduction gear ratio is N, by an inverter motor. CONSTITUTION:Since a maximum reduction gear ratio of a reduction gear 70 is suppressed to '8' smaller than a maximum reduction gear ratio N capable of obtaining constant torque characteristic by an inverter motor and a series of i=2, 3, 4, 5, 6, 8 in which its tolerance ratio R falls within 1.2-1.5, are prepared, a variable geared motor can be so selected as to always obtain an allowable input capacity of 67% or more to a rated value of the motor in a rotating range of 1/N to 1/2 of a synchronous rotating speed of the motor 60. Thus, even if the motor having a size smaller by one or two rank than that of prior art is employed, the same using purpose as that of the prior art can be realized.</p> |
