Hall effect current sensors are non-intrusive solutions for detecting AC and DC current flow in wires or PCB traces. These sensors offer galvanic isolation and high accuracy, making them ideal for electric vehicles, solar inverters, power supplies, and motor control applications.
Why Use a Hall Effect Current Sensor?
- Contactless and isolated current sensing
- Supports both AC and DC measurement
- High-speed response for dynamic current changes
- Low power consumption and compact size
Common Types of Hall Effect Current Sensors
- Bidirectional Hall effect current sensor – Measures positive and negative current
- DC current sensor Hall effect – Optimized for battery monitoring, EV systems
- Hall effect current sensor module – Ready-to-use with built-in op-amps or ADC
Applications of Hall Current Sensors
- Electric vehicle battery monitoring
- Solar panel energy feedback (hall effect current sensor for solar)
- Motor driver overcurrent protection
- Power tool current regulation
- AC line sensing with ACS712 sensor module
How Does a Hall Effect Current Sensor Work?
When current flows through a conductor, it generates a magnetic field. A Hall effect chip detects this field and converts it into a voltage signal proportional to the current. This principle allows accurate current sensing without direct electrical contact.
Figure: Operating principle of a bidirectional Hall effect current sensor
Recommended Hall Effect Current Sensor Modules
ACS712 Hall Current Sensor
Measures ±5A to ±30A AC/DC current with analog output, ideal for Arduino and IoT.
Bidirectional Hall Effect Sensor
Designed for EV and solar systems requiring both current directions.
Related Resources
FAQs
What is a bidirectional Hall effect current sensor?
It's a sensor capable of measuring current flow in both directions, ideal for battery charge and discharge cycles.
Can Hall effect sensors measure AC current?
Yes, they are suitable for both AC and DC applications, with proper filtering and calibration.
What's the typical accuracy of a Hall effect current sensor?
Depending on the model, accuracy can range from ±1% to ±3% of full-scale current.
