| 摘要 |
PURPOSE:To make it possible to display direct the mechanical output of an induction motor in operation by finding a difference between voltages equivalent to the rotational velocity and synchronous velocity of the motor. CONSTITUTION:The output of regulated direct-current power supply P is supplied to the induction motor and also to differential and operational amplifier A, generating an output voltage corresponding to a synchronous velocity, via resistance R1 and pulse (a) of a frequency in proportion to the rotational velocity of the induction motor, on the other hand, is voltage-converted FV and supplied to amplifier A. Then, the output of amplifier A becomes a voltage in proportion to the difference between the synchronous velocity and rotational velocity. The output of the motor can therefore be displayed direct by supplying this difference voltage to a meter, etc. |
