| 摘要 |
PURPOSE:To eliminate the influence of a hysteresis and in insensitive band in a low torque range in the output characteristic for the input of a motor by driving the motor around the point except the origin of the characteristic line. CONSTITUTION:When an input voltage (a) is applied, a torque motor tends to rotate in the direction designated by an arrow 2, and a motor 1' tends to rotate in the direction designated by an arrow 2'. Accordingly, the torques of both maintains the balanced state at the operating origin 6. Then, a signal 5 is applied to the motor 1, and the signal 5' which has equal amplitude to the signal 5 and different phase difference of 180 deg. to the motor 1'. Then, varied torque proportional to the signal is generated. As a result, the origin 6 in the signal/ output torque characteristic as shown is output torque zero, and the verying torque of the range 7 is generated. Thus, the varying torque can be generated in the range 7 having good linearity. |
