Patent ID: 8733509

Claim:
A suspension work platform hoist system ( 10 ) for raising and lowering a work platform ( 100 ) on a rope ( 400 ), the suspension work platform hoist system ( 10 ) powered by a constant frequency input power source ( 800 ) via a conductor system ( 810 ), comprising: a hoist ( 200 ) having a motor ( 210 ) that drives a traction mechanism ( 220 ) designed to cooperate with the rope ( 400 ), wherein the hoist ( 200 ) configured for attachment to the work platform ( 100 ); a reactive power reducing input power system ( 1300 ) in electrical communication with the motor ( 210 ) and the constant frequency input power source ( 800 ), via the conductor system ( 810 ), wherein the reactive power reducing input power system ( 1300 ) includes an AC-DC converter ( 640 ) and a regulator system ( 650 ), wherein the regulator system ( 650 ) is in electrical communication with a DC-AC inverter ( 670 ) in electrical communication with the motor ( 210 ), wherein the reactive power reducing input power system ( 1300 ) accepts at least two different alternating current voltage power inputs including a first alternating current voltage and a second alternating current voltage, and the regulator system ( 650 ) produces a single direct current voltage from either the first alternating current voltage or the second alternating current voltage, and transmits the direct current voltage to the DC-AC inverter ( 670 ).