| 摘要 |
PURPOSE:To stabilize the control and to improve the stability of a system by turning a switch OFF when the integrated value of injected energy after the switch is turned OFF becomes the prescribed value. CONSTITUTION:A set pulse is applied to the set input of a flip-flop 86 to turn a chopper 2 ON, the product of a power source voltage VL and a chopper current iC is calculated by a multiplier 81, and the value is integrated by an integrator 83. On the other hand, the product of a command torque Ti and the revolving number NM is calculated to obtain a command power Pi, and the output of the integrator 83 and the power Pi are compared by a comparator 84. When both become equal, a flip-flop 86 is reset to turn the chopper 2 OFF. Simultaneously, the integrated value of the integrator 84 is initialized to 0. Thus, the energy while the chopper switch is energized and the power command can be equalized. |
