| 摘要 |
A process which relates more particularly to handling of conveyors having off-level sections in their path. The process is characterized in that in every section which is other than level, at least one of the side armatures of the conveyor is omitted and replaced by an a.c. energized auxiliary linear motor field. While a self-propelled trolley is moving in the section other than level, at least one of the fields of the trolley, namely the field corresponding to the omitted side armature, is disconnected from its energizing a.c. circuit by appropriate means and simultaneously connected to variable impedances so as to behave like an armature in relation to the auxiliary field, the impedances behaving like armature impedances, so that the system lakes the form of an auxiliary variable-speed linear motor associated with each off-level section. The auxiliary linear motor provides the power or extra power for driving or retarding the trolley while the same is travelling in the off-level, the trolley speed in the off-level section thus being maintained substantially equal to the trolley speed in the level zones.
|
