Typically, HVAC systems consume a significant amount of energy in both commercial and domestic buildings. The major part of energy consumed in a HVAC system lies in compressor motor, which usually is a high-speed motor. Efficiency of the motor and cost effectiveness of motor & drive system are two major factors deciding the motor type to be used in this application for compressor manufacturers. Again, the cost of the motor and VFD system is a factor decided by few inputs including motor material cost, mechanical integrity required in manufacturing, power factor and drive switching frequency. Since the HVAC motors are not continuously run at rated power, the integrated part load value (IPLV) is considered here instead of rated efficiency. This presentation discuss different trade-offs of using permanent magnet synchronous motor(PMSM), induction motor, switched reluctance motor and PM assisted synchronous reluctance motor for designing a 100kW, 16500rpm compressor motor to run in a hermetic refrigerant environment.