| 摘要 |
<p>PURPOSE:To simplify a control circuit by setting a control command value with inputs of a vehicle speed and tractive force. CONSTITUTION:The first and second pattern circuits 11a, 12a calculate power P capable of generating as energy of a vehicle from a torque command, i.e., tractive force T and a vehicle speed fM. The sum of mechanical loss and electrical loss is subtracted from the power P to calculate generated power Pe, and the square root of the product of the power Pe and the resistance value of the generating resistor is obtained as the terminal voltage of a filter capacitor. The product of the value subtracted by the inverter internal voltage drop from the terminal voltage and 120 deg. basic wave component content rate (6<1/2>/pi) is set to the effective voltage value between induction motor lines, and a slip frequency pattern fSP and a current pattern IP are determined from the induction motor characteristic at the voltage between the lines.</p> |
