METHOD OF MEASURING COMPONENTS OF IMPEDANCE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2019 - IPC G01R27/02 

FIELD: physics.

SUBSTANCE: invention relates to the field of electric measuring equipment, namely to measurement and control of active and reactive components of impedance, including two-terminal circuits having electromotive force between poles, for example, electric alternating current machines. Set task is achieved by the fact that in the measurement method involving formation of the first sinusoidal voltage and two rectangular voltages with identical periods and certain mutual time shifts and subsequent formation of the first and second measuring signals using them, introducing an additional measuring channel based on a measuring shunt, by means of which a third measurement signal is generated, wherein the active component of the analysed impedance is determined by calculating the ratio between the first and third measurement signals, and the reactive component of the analysed impedance is determined by calculating the relationship between the second and third measurement signals. To implement the method, the device for measuring impedance components further includes a current shunt, a third amplitude detector, wherein output of first shaper is connected to impedance input through measuring current shunt, inputs of the second shaper and the third amplitude detector are connected in parallel to the current shunt, wherein the front of the first rectangular voltage from the first output of the second shaper coincides with the moment of transition of the third sinusoidal voltage through zero, output of the third amplitude detector is connected to the third input of the computing unit.

EFFECT: technical result is higher accuracy of measuring components of impedance.

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