It’s no secret that brushless DC motors (BLDC) are one of the major trends in locomotion technology today. In this article, find out how to regulate their commutation using Hall-effect sensor ICs from Honeywell.
BLDC motor technology utilizing Hall-effect sensor ICs provides a reliable and cost-effective alternative to conventional DC motor commutation. Low Gauss levels allow for lower-cost magnetics to be integrated into the design. Because the Hall-effect ICs have no moving parts, they’re also significantly more reliable than their predecessors.
Theory of Operations
BLDC motors are built differently than conventional motors, with a permanent magnet being the rotational member surrounded by armature windings. The brushes are replaced by position sensors and electronic switches in a BLDC motor. Instead of brushes commuting the armature current interaction, as in older designs - in BLDC motors, a Hall-effect sensor IC detects the position of the rotating magnet and provides current flux through logic and circuitry.
Types of Hall-Effect ICs Available
Honeywell offers a robust assortment of different Hall-Effect sensors, making it easy to select the right one for your design.
- • Latching Hall-effect sensors
- • SOT-23 surface mount
- • TO-92 through-hole
- • High-Sensitivity Latching Hall-effect sensors
- • SOT-23 surface mount
- • TO-92 through-hole
- • AEC-Q100 qualified for use in automotive applications
- Features and Benefits
- • Subminiature package size allows for compact designs
- • Low voltage operation down to 2.7V
- • Built-in pull-up resistor for better interfacing
- • Built-in reverse voltage protection
- • Tough design with a temp range up to 150 °C [302 °F]
- • High sensitivity - as low as 30 Gauss
- • Cost-effective
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