Some knowledge about DC current transformers

News | company news | May 28,2024

Some knowledge about DC current transformers

What is a DC current transformer?

DC current transformers refers to the mutual inductance used for DC current value conversion. It utilizes the nonlinearity and asymmetry of the core coil when the core is magnetize by DC and AC currents, and converts the large DC current passing through the coil into a small DC current in inverse proportion to the number of turns through the rectifier circuit. It is mainly use to measure large DC currents and is also use as current feedback, control and protection components in rectification systems. Compared with the shunt, it has low power loss and isolation effect.

Working principle of DC transformer

Transformer used for DC current magnitude conversion. It utilizes the nonlinearity and asymmetry of the core coil when the core is magnetize by DC and AC currents, and converts the large DC current passing through the coil into a small DC current in inverse proportion to the number of turns through the rectifier circuit. It is mainly use to measure large DC currents and is also use as current feedback, control and protection components in rectification systems. Compared with the shunt (see ammeter), it has low power loss and isolation effect. Under ideal conditions, the difference between the power supply voltage U and the voltage on the load resistor Rx is borne by the secondary winding on the unsaturated core, and N1I1=N2I2 or I1/I2=N2/N1 (I2 is the secondary current), that is I2 and I2 have an inverse relationship with the number of turns. After I2 is rectified, it can be read with a DC ammeter or calculated using the voltage drop across the load resistor Rx.