Hall Effect Speed & Direction Sensor

Features of Hall Effect Speed & Direction Sensor

1. Wide Speed Range: Capable of sensing from near zero speed up to 20kHz makes our hall speed sensor suitable for a variety of applications requiring precise speed measurement.

2. Versatile Power Supply: This hall effect speed sensor can be used with an unregulated supply.

3. Environmental Compliance: The high speed hall effect sensor is RoHS compliant, ensuring it meets environmental and safety standards.

4. High Protection Rating: Our hall speed sensor is available with IP67 or IP69 ratings.

5. Air Gap Tolerance: This hall effect speed & direction sensor has a typical air gap range of 0.3-2.2mm, allowing for reliable performance even with varying distances between the sensor and the target.

Specification of Hall Effect Speed & Direction Sensor

Hall Effect Speed Sensor Working Principle

A Hall Effect speed sensor operates based on the principles of the Hall Effect, which involves a thin piece of rectangular p-type semiconductor material, such as gallium arsenide (GaAs), indium antimonide (InSb), or indium arsenide (InAs), through which a continuous current flows. When this semiconductor is placed within a magnetic field, the magnetic flux lines exert a force on the charge carriers (electrons and holes), causing them to deflect to either side of the semiconductor slab. This deflection results in a potential difference across the semiconductor material due to the build-up of charge carriers. The Hall Effect, named after Edwin Hall who discovered it in the 1870s, relies on the Lorentz force and requires the magnetic flux lines to be perpendicular to the current flow. The sensor detects the presence and magnitude of a magnetic field, typically turning “ON” (closed circuit) when exposed to a magnetic field of sufficient strength and correct polarity, and remaining “OFF” (open circuit) in the absence of such a field. This principle allows the Hall Effect sensor to provide information about the type of magnetic pole and the strength of the magnetic field, making it a crucial component in various applications, including speed sensing.

Advantages of Hall Effect Speed Sensors

Non-Contact Sensing: hall effect speed sensors provide non-contact sensing capabilities, which enhances their durability and longevity.

Robustness: hall effect speed sensors are designed to withstand harsh environmental conditions, demonstrating resilience against dust, moisture, and vibration.

Versatile Speed Range: hall effect speed sensors are effective across a wide range of speeds, including near-zero velocities, making them suitable for various applications.

Applications of Hall Effect Sensors in Automobiles

Safety Mechanisms: Hall Effect sensors provide critical safety measures, such as preventing electrostatic discharge, protecting against spark ignition hazards, and mitigating reverse polarity in car batteries. They also monitor thermal overload and detect overcurrent conditions, triggering protection circuits to prevent malfunctions.

Power Electronics in EVs and HEVs: In hybrid and electric vehicles, Hall Effect sensors regulate electric energy flow across systems like AC motors and DC-DC converters. Their ability to ensure efficient current sensing improves motor performance by offering a stable signal, reduced noise, and quick response times in various operating modes.

Transition to Electrically Driven Systems: Hall Effect sensors facilitate the shift from mechanical to electric actuation in vehicles. For instance, traditional fan belts and power-steering pumps in internal combustion engines are being replaced by electric motors, enhancing actuator control and energy efficiency.