Contents
How does a current sense work?
How do current sensors work? When current flows through a conductor, it creates a proportional magnetic field around the conductor. The sensor then outputs a certain voltage or current that a meter connected to the sensor can read and translate into the amount of current flowing through the conductor.
How do current transducers work?
A current transducer reads current and generates a signal for its output. In this case, current is sensed and converted (transduced) into a proportional output (milli-amp or voltage).
What happens when you put a sense resistor on a motor?
However, the terminal resistance of a miniature motor is very low, typically just a few Ohms. As a result, inserting a ‘sense’ resistor in series will result in a significant fraction of the supply voltage being dropped over that resistor unless the resistor value is very small.
What are the applications of induction current sensing?
Motor Monitoring and Control. One of the most common applications for induction current sensing is motor monitoring. Because current draw is such an excellent indicator of motor condition, the current sensor can be used to solve a wide range of process control, safety, and maintenance problems.
How is the mechanical power of an electric motor measured?
Basic mechanical power measurements. In an electric motor, the mechanical power is defined as the speed times the torque. Mechanical power is typically defined as kilowatts (kW) or horsepower (hp) with one watt equaling one joule per second or one Newton-Meter per second.
Why is it important to know current input to equipment?
Simply stated, measuring the current input to equipment gives you more knowledge about actual equipment performance. Seeing load changes instantly can help you improve throughput, reduce waste, and prevent catastrophic equipment failure. Continuous real-time monitoring of current draw can also be used for trend analysis or status alarming.