Abstract: In an elevator system driven by a linear motor a small consistent air gap must be maintained between two elements of a linear motor for proper and efficient operation of the system. The air gap within the linear motor can be maintained and adjusted by utilizing a roller cam adjuster. The roller cam adjuster is disposed on a side of a moving portion of the linear motor and is supported by a plate with a roller disposed therein. As the roller cam adjuster is adjusted, the air gap can be either increased or decreased depending upon the need.

Abstract: A flat, single-sided linear motor driven elevator minimizes a moment on a primary element assembly towards a secondary element by aligning and balancing a center of gravity of the primary element assembly along the plane of an air gap between the primary and secondary elements of the linear motor. Ropes supporting the primary element assembly are attached thereto, and weights are positioned on a side of the plane, other than the side of the plane on which the primary element is disposed, to balance the centers of gravity and thrust of the primary assembly along the plane.

Abstract: A secondary of an elevator linear motor includes a highly conductive layer, the layer having a plurality of periodically spaced grooves disposed horizontally therein, the grooves providing space for thermal expansion of the layer and guiding current induced on said layer thereby increasing the efficiency of the motor.