DEVICE TO CONTROL SERVICEABILITY OF DC MOTOR Russian patent published in 2014 - IPC G01R31/34 

FIELD: measurement equipment.

SUBSTANCE: device includes frequency filters placed into the body and appropriate integrators, a unit of signal processing, a port with leads to facilities of indication and visualisation. Additionally the device includes a current converter and a voltage converter, made on the basis of Hall sensors and installed remotely with the possibility of their connection to the power supply bus of the DC motor. The device body also additionally includes an amplifier, an amplitude selector, a source of reference voltage, a unit of measurement of phase difference and a unit of pre-start control of phase difference, a port with terminals for transfer of information signals, a port of terminals for additional power supply of remote elements. Frequency filters include a low pass filter and a bandpass filter, each of which forms parallel electric circuits with the appropriate integrator. Above blocks and elements of the device are connected in the following manner: an amplitude selector - with an amplifier, with a source of reference voltage, and by means of the above parallel electric circuits - with a signal processing unit, which is connected to the source of reference voltage, to the port with leads to facilities of indication and visualisation, to the unit of permit control of phase difference related to the unit of measurement of the phase difference angle. The latter is connected to the port with terminals for transfer of information signals, which is connected to the amplifier. The port with terminals for connection of power supply of remote elements is connected to the source of reference voltage.

EFFECT: simplified design of the device and increased accuracy of measurement.

3 cl, 1 dwg