Current Sensors

1. What are Current Sensors?

Current sensors use technologies such as the Hall effect, fluxgate, or resistive shunt to convert invisible current signals into measurable voltage/digital signals. Main types include:

Open-loop Hall Effect Sensors: low cost and fast response.

Closed-loop Hall Effect Sensors: accuracy up to 0.5%.

Magnetoresistive Sensors: suitable for high-frequency detection.

Fiber Optic Sensors: resistant to electromagnetic interference.

 

2. What are the Core Parameters of Current Sensors?

Indicator

Typical Range

Application Impact

Measurement Range

5A-2000A

Determines system compatibility

Response Time

1μs-100μs

Affects dynamic monitoring

Isolation Voltage

1kV-10kV

Ensures safety level

 

3. Industry Applications of Current Sensors

New Energy: Photovoltaic Inverter Current Monitoring.

Industry 4.0: Motor Drive System Overload Protection.

Electric Vehicles: Battery Management System (BMS).

Smart Grid: Fault Current Detection.

 

4. Selection Key Points for Current Sensors

Determine the measurement type (AC/DC/Pulse);

Evaluate the impact of ambient temperature on accuracy;

Consider installation space constraints;

Balance cost and performance requirements.