| 摘要 |
PURPOSE:To simplify circuit corstitution by adding and integrating a pulse train signal proportional to rotational speed and a pulse train signal proportional to slip. CONSTITUTION:Signals fomega2',fomegasl' / are cach obtained through monostable circuits la, lb from a pulsl train signal fomega2 having frequency proportional to rotational speed and a pulse train sigral fomegasll having frequoncy proportional to slip, and an OR output fh is acquired from an OR gate 3a. A signal omega2uD represcntirg the direction of rotation of a motor and a signal omegaSLUD represcrting slip polarity are are inputted at that time, up-count opcration is conducted by an up-down counter 5, and an output omega1t corresponding to fomega1=fomega2+fomegasl is obtained. When the signal omega SLUD reaches 'L', down count is performed in the up dowr countcr 5, and an output omega1t corresponding to fomega1=fomega2-fomegasl(is acquired. |
