MEASURING CIRCUIT FOR EXAMINATION AND OBSERVATION BY MEANS OF OSCILLOSCOPE, COMMUTATING CURRENT WAVEFORMS IN ELECTRIC MOTORS

摘要

1. Measurement system for testing and observation of patterns of commutating currents in universal electric motors, containing an oscilloscope, characterized in that it contains a driving motor (1) with a power greater than the power of the tested electric motor (2), powered by the circuit of an inverter (3), where the driving motor (1) is connected via a coupling (5), fixed-ratio transmission (6) and flexible coupling (6') to the rotor (7) of the tested electric motor (2), whose windings are connected via a small flexible coupling (14) and a mercury collector (15) to a measurement apparatus containing an oscilloscope (16) with an external release circuit (17), while the rotor (7) of the tested electric motor (2) is supported on a bearing in a measurement frame (8) which contains an adjustable brush-holder unit (24) and an adjustable rotating disc (25) to which is fastened the stator (28) of the tested electric motor (2).IMAGE