Some tests on a stator-fed polyphase shunt commutator motor

Based on theory developed in earlier papers, equivalent circuits are established for a stator-fed 3-phase shunt commutator motor available for tests. Details are given of methods used in the measurement of equivalent-circuit parameters. The measurement and separation of motor no-load losses are discussed. Test results obtained in no-load and load tests are shown to give fairly good agreement with calculated behaviour.