ZERO CURRENT SENSOR Russian patent published in 2010 - IPC H02M1/08 G06G7/12 

FIELD: electricity.

SUBSTANCE: zero current sensor includes in-series connected control signal source, the first four-pole device, summator, integrator, the first relay element the output whereof through the second four-pole device is connected to the second input of summator, in-series connected proportional-differentiating element, demodulator, smoothing filter, the second relay element the output of which is connected to output terminal. Also to the device there introduced is non-linear element with dead zone, the input of which is connected to output of integrator, and output is connected to the third input of summator; at that, input of proportional-differentiating element is connected to output of the first relay element.

EFFECT: improving operating accuracy owing to introduction of non-linear element.

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