| 摘要 |
<p>PURPOSE:To control the voltage impressed to the motor, by making comparison between output torque of the motor and adhesive force, and giving an instruction signal to make the adhesive force equal to or larger than the output torque of motor. CONSTITUTION:Output current of DCCT8 for detecting field current is passed through converter circuit 9 and supplied to multiplying circuit 10 together with output current of DCCT11 for detecting armature current. In the multiplying circuit 10, output torque is computed and it is afforded to instruction circuit 7 after it is converted into a corresponding voltage value by voltage converting circuit 13. Output signals of adhesive force computing circit 1, differentiation circuit 2 for differentiating the armature speed and adding circuit 3 are given to adhesive force compensating circuit 5 and then supplied to instruction circuit 7 via circuit 6 adapted for converting the adhesive force into voltage. In the circuit 7, comparison is made between voltage signal of adhesive force pattern and that of the output torque and a control signal is given to make the adhesive force equal to or larger than the output torque.</p> |
