GB/T 32877-2022 Active

This document outlines the test methods and interpolation procedures for determining the losses and efficiency of motors within the scope of GB/T 755—2019 when powered by frequency converters, and these motors are also part of the speed-regulated electrical drive systems (PDS) defined in GB/T 12668.902—2021.
The motor efficiency determined using the comparative frequency converter method in this document is only used to compare different motor designs.
This document also provides a procedure for determining the losses of motors at any load point (torque, speed) within the reference speed range (constant torque range, constant magnetic flux range) based on the losses at seven standard load points. This procedure is applicable to any speed-regulated AC motors (induction and synchronous) powered by frequency converters and voltage regulators in accordance with the specifications of GB/T 755—2019.