Analysis of electrical energy consumption in elevator drives

This paper examines the energy consumption in electric drives for vertical transport considering the system of a hoist machine and a variable speed drive. Most common solution for the modern elevator drives is a system consists of a Permanent Magnet Synchronous Motor as hoisting machine and three phase Variable Voltage Variable Frequency converter with intermediate DC link as energy converter. Energy consumption measurements on system like this is conducted and elaborated. Presented are both, the necessity of the variable speed drives in dynamic regimes for reducing electrical losses well as their contribution in increasing of the harmonics and distortion energy. The consumption of the active reactive and the distortion energy of the complete system are evaluated.