Low Frequency Inverter 12v 24v 48v

FI series Low frequency inverter 12v 24v 48v

     Current sense resistors, also known as shunts, are the technology of choice for measuring current. In order not to adversely affect the current flow, the resistance of the shunt is small, producing a proportionally small voltage across it. Therefore, designers must utilize circuits that amplify this small voltage for upstream conversion through an analog-to-digital converter (ADC).

    The small voltage across the shunt resistor must typically increase from tens or hundreds of millivolts to a fraction of a volt. This task is usually performed by an op amp or a current sense amplifier. The current sense amplifier is a specialized operational amplifier that integrates a laser-trimmed precision resistor network to set the gain. Typically, the amplifier voltage gain is around 20 to 60 steps, and sometimes more.

    Current sense amplifiers may or may not contain shunt resistors in the same package. For high power applications, external shunt resistors are preferred as heat is generated from power dissipation.

    The most common signal chain configurations used to monitor current include shunt resistors, analog front ends (AFEs), analog-to-digital converters, and system controllers. An AFE, such as an op amp or dedicated current sense amplifier, converts the small differential voltage developed across the shunt resistor into a voltage usable by the ADC.

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