US 12,312,211 B2
Power management in an elevator system
Virgilio Valdivia Guerrero, Roquetas de Mar (ES); Ismail Agirman, Southington, CT (US); Daniel Diaz-Lopez, Tres Cantos (ES); Mario Sanz Abia, Valladolid (ES); Stephan Glessner, Berlin (DE); and Herbert Horbrugger, Berlin (DE)
Assigned to OTIS ELEVATOR COMPANY, Farmington, CT (US)
Filed by Otis Elevator Company, Farmington, CT (US)
Filed on Oct. 16, 2019, as Appl. No. 16/654,718.
Claims priority of application No. 18201462 (EP), filed on Oct. 19, 2018.
Prior Publication US 2020/0122960 A1, Apr. 23, 2020
Int. Cl. B66B 1/30 (2006.01); H02P 3/14 (2006.01); H02P 27/06 (2006.01)
CPC B66B 1/306 (2013.01) [B66B 1/302 (2013.01); H02P 3/14 (2013.01); H02P 27/06 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A power management system (1) for an elevator system (2), the power management system (1) comprising:
a three-phase power converter (12) having three input terminals (R, S, T) and two output terminals, a first (R) and a second(S) of the input terminals coupled to a main power source (11) for supplying single-phase AC power to the power management system (1) and the three-phase power converter (12) configured to convert the AC power from the main power source (11) into DC power on a common DC bus (38) connected to the two output terminals;
a secondary power source (26) for supplying DC power to the common DC bus (38);
a power inverter (14) configured to invert the DC power on the common DC bus (38) into AC output power for driving an electric motor (16) of the elevator system (2); and
a dynamic braking resistor (22) having a first terminal directly connected to a third input terminal (T) among the three input terminals (R, S, T) of the three-phase power converter (12) and having a second terminal directly connected to the DC bus (38).