TRAINING-LABORATORY BENCH FOR STUDYING ELECTRIC MACHINES AND ELECTRIC DRIVES Russian patent published in 2013 - IPC G01R31/34 

FIELD: electricity.

SUBSTANCE: bench comprises a braking device, electric machines of AC and DC, a coupling, a photoelectric sensor of shaft rotation angle and a unit of control, electric measurements and indication, comprising sensors of current force with analogue inputs, sources of power supply, a panel of patch board control with terminals, a liquid crystal indicator and a set of connecting wires. Tested electric machines are connected to each other by output shafts via intermediate reducers and a coupling, outputs of inverters are connected to windings of an AC electric machine, and their inputs - to two outputs of a microcontroller; the output of the width-pulse modulator is connected to the winding of the DC electric machine, and its input - to the third output of the microcontroller. It makes it possible to apply small-sized low-voltage motors-reducers of AC and DC and alternate use of each of them as a loading device for the other one. The bench comprises a sensor of basic shaft position installed on the output shaft of one of motors-reducers, and its output is connected to the input of the unit of control and electric measurements, which makes it possible to perform tests of electric drives with working of specified angles of output shaft rotation.

EFFECT: higher electric safety.

3 cl, 1 dwg