| 摘要 |
<p>PURPOSE:To drive an electric rolling stock under the condition of the highest adhesive coefficient, when any idling or slipping has been detected, by calculating motor current corresponding to the highest adhesive coefficient based on adhesive coefficients calculated before and after occurrence of idling or slippage and a motor current corresponding to the torque of motor, and employing the calculated motor current as a current command. CONSTITUTION:An adhesive coefficient is calculated continuously based on inertia constant, acceleration, torque and axle load of a motor 5 under normal traveling. Upon occurrence of idling, the maximum value of the adhesive coefficient is searched from those calculated during a predetermined interval from before start of idling to immediately after occurrence of idling. Then a current value corresponding to the maximum value is calculated. Furthermore, a motor current is calculated based on the current value and the motor current prevailing before occurrence of idling, and thus calculated motor current is employed as a motor current command after re-adhesion.</p> |
