Elevator motor drive tolerant of an irregular power source

US8127894B2 · kind B2 · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Ismail Agirman · Southington, US
• Christopher S. Czerwinski · Middletown, US
• Jeffrey M. Izard · Bolton, US
• Edward Piedra · Holyoke, US
• Vladimir Blasko · Avon, US
• Frank Higgins · Trenton, US
• HanJong Kim · Meridian Avenue, US

Key dates

• Filing date: Nov 23, 2005
• Grant date: Mar 6, 2012
• Expiry date: Jan 29, 2027

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B1/308
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A hoist motor (12) for an elevator (14) is continuously driven from an irregular power supply (16). A regenerative drive (10) delivers power between the power supply (16) and the hoist motor (12). A controller (11) measures a power supply voltage in response to a detected change in the power supply voltage and controls the regenerative drive (10) to adjust a nominal motion profile of the elevator (14) in proportion with an adjustment ratio of the measured power supply voltage to a normal power supply voltage.