Elevator control unit and a method for determining energy and/or power consumption of an elevator

Elevator control system comprising:

• a drive system comprising, as a drive unit for driving an electric motor of an elevator, a circuit formed of
• a three-phase solid-state rectifier equipped with built-in voltage and current sensors to respectively measure the phase input voltages and phase input currents of the rectifier,
• an intermediate DC circuit comprising a positive DC circuit busbar and a negative DC circuit busbar, with a capacitor connecting the positive DC circuit busbar and the negative DC circuit busbar, the intermediate DC circuit being equipped with a built-in voltage sensor to measure the voltage between the positive and negative DC circuit busbars, and
• a three-phase solid-state inverter connected to the output of the rectifier via the positive and negative DC circuit busbars, the inverter being equipped with built-in current sensors to measure the phase currents output from the inverter to the electric motor;
• and
• at least one processor configured to execute instructions stored in at least one memory,
• wherein the elevator control system is configured to use at least two different operating states for the elevator, and
• wherein, based on the executed instructions, the processor is configured to:
• while the drive unit causes the elevator to move,
• collect the phase voltage measurements and the phase current measurements from the built-in volage and current sensors of the rectifier,
• collect the voltage measurements from the built-in voltage sensor of the intermediate DC circuit, and
• collect the phase current measurements from the built-in current sensors of the inverter;
• combine the collected measurements into a measured power and/or energy consumption of the drive system when the elevator is moving;
• determine duration which the elevator spends in each operating state of the elevator,
• determine energy and/or power consumption of the elevator based at least in part on the measured power and/or energy consumption of the drive system, and a determination of an amount of power and/or energy that is consumed by the elevator while operating in each of the different operating states;
• and
• transmit, via a network or wireless communications, data of said determined energy and/or power consumption to at least one of a building energy management system and an external computing device programmed to monitor energy consumption of the elevator.