Power management in an elevator system

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 input terminal (R) of the three input terminals being coupled to a main power source (11) for supplying single-phase AC power to the power management system (1), the main power source being coupled between the first input terminal and an intermediate circuit connected intermediate the positive and negative poles of a common DC bus;
• the three-phase power converter (12) is configured to convert the AC power from the main power source (11) into DC power on the 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);
• a dynamic braking resistor (22) having a first terminal directly connected to a third input terminal (T) among the three input terminals of the three-phase power converter (12) and having a second terminal directly connected to the common DC bus (38);
• and
• a supercapacitor stack (30) coupled between a second input terminal(S) among the three input terminals of the three-phase power converter (12) and the common DC bus (38).