| 摘要 |
PROBLEM TO BE SOLVED: To provide a drive control equipment wherein a circuit constitution and control can be simplified, by making pre-excitation unnecessary at the time of performing regenerative braking. SOLUTION: An armature 2a of a motor 2, a contactor 3, a contactor 4 for advance, a contactor 5 for backing, a field coil 2b and a main transistor 6 are connected in series between both terminals of a battery 1. The contactor 3 is switched in a first state wherein the armature 2a and the field coil 2b are connected in series to the battery 1, and a second state wherein the field coil 2b and the armature 2a are connected in parallel to the battery 1. The contactor 3 is changed in the second state at the time of regenerative braking, the motor 2 operates similarly to a shunt motor and makes the armature 2a rotate at a constant speed lower than the speed capable of regenerating. Then the difference of the speed is regenerated to the battery 1, and the damping equivalent to its electric power (i.e., regenerative braking) is applied to the motor 2. |
