Current sensors are devices designed to measure electric current, and depending on the intended use, there are various types ranging from those that measure a small current of a few mA to those that measure a high current of several thousand amperes. Furthermore, there are two types of current: direct current (DC) and alternating current (AC). Consequently, selecting the most suitable current sensor requires careful consideration of the measurement principle and physical structure tailored to the specific application.
In a CT (Current Transformer) type sensor, the magnetic flux generated by the primary current induces a secondary current, which is then measured as a voltage across a shunt resistor.
Hall-effect current sensors measure the magnetic field generated by current flowing through a conductor. This measurement is typically performed by a Hall element within the sensor.
MI (Magneto-Impedance) current sensors utilize the magnetic impedance effect of amorphous wires. They are characterized by their high accuracy.
Current sensors are used to measure and evaluate devices, so they must always work properly. The current sensor test is used to evaluate them. Evaluating current sensors requires a power supply that can provide a stable, constant current with low noise (ripple).
Matsusada Precision's power supplies are the ideal solution for stringent current sensor testing. Matsusada precision products have a wide lineup of output currents ranging from several mA to several thousand A, making it possible to evaluate various current sensors.
| Applications | Features | |
|---|---|---|
| CT type current sensor | Clamp power meter | Low cost, no external power supply required, measures AC only |
| Hall effect sensor | Battery management | Measures both AC and DC, low heat generation |
| MI current sensor | Solar power generation, drones | High sensitivity, low power loss, non-contact measurement |
- current sensor
- Hall element
- Hall current detector
- Shunt resistor
- MI current sensor
- Hall sensor
