Distributed Screw and Nut Drive Systems with Synchronized Motors for Lifts

A distributed drive system for a lift, the distributed drive system comprising:

• a first drive unit comprising:
• a first drive unit screw comprising a helical thread, wherein the first drive unit screw is oriented along a hoistway of the lift;
• a first motor unit concentric to the first drive unit screw, wherein the first motor unit is configured to rotate the first drive unit screw;
• and
• a first drive unit nut in contact with the first drive unit screw and in contact with a carrying platform of the lift, wherein the first drive unit nut is configured to travel a length of the helical thread of the first drive unit screw as the first drive unit screw rotates, causing the first drive unit nut to travel along the hoistway of the lift;
• a second drive unit comprising:
• a second drive unit screw comprising a helical thread, wherein the second drive unit screw is oriented along the hoistway of the lift;
• a second motor unit concentric to the second drive unit screw, wherein the second motor unit is configured to rotate the second drive unit screw;
• and
• a second drive unit nut in contact with the second drive unit screw and in contact with the carrying platform of the lift, wherein the second drive unit nut is configured to travel a length of the helical thread of the second drive unit screw as the second drive unit screw rotates, causing the second drive unit to travel along the hoistway of the lift;
• and
• a control feedback module operatively connected to the first and second drive units, wherein the control feedback module is configured to synchronize position or rotary speed of the first motor unit and the second motor unit.