RES and battery fed energy efficient single‐phase induction motor drive system with retrofit solution

Abstract

The usage of renewable energy sources (RESs) with energy storage like battery and so on in the stand‐alone household and commercial purpose is becoming popular. These systems have to manage the requirement with the generated energy from the RES. Further, in a typical stand‐alone household application, a significant amount of power is consumed by single‐phase induction motor (SPIM) fans in the form of the ceiling, pedestal formats. So, it is necessary to save energy by operating them efficiently and economically in a stand‐alone system. This study proposes a fractional flux‐based V/f control strategy for speed control of a SPIM. The proposed retrofit scheme is simple and is easy to implement. It minimises the magnetisation loss irrespective of the fan speed and also saves nearly 10–20% of power consumption as compared to the conventional voltage control method. Further, in this study, a new performance parameter is defined which helps in determining an economic zone in variable speed operation SPIM. In this economic zone of operation, a particular battery can deliver power for an extended time. All the details with respect to analysis, modelling, simulation and experimental results to support the proposed strategy are presented in this study.