Hall Sensor Encoder

Hall sensor encoders are increasingly and widely used in industrial motor control systems due to its structural simplicity and durability in harsh environment at much less cost than resolvers or optical encoders. However, many external impairments as well as magnetic saturation introduce distortions in the sensing signals, and result in degraded accuracy of position detection. Typical Hall sensor encoders employ even number of Hall sensors, and from which two-phase orthogonal signals are sensed. ZF Hall sensor encoders employ odd N number of Hall sensors, and from which N-phase displacement signals are sensed. The sensed N-phase signals are ZF transformed to synthesize the two-phase orthogonal signals.

• Sine and Cosine Signals are Sensed from the Even Number of Hall Sensors

• N-phase Displacement Signals are Sensed from odd N Number of Hall Sensors
• Sine and Cosine Signals are Synthesized by the ZF Transform

• Magnetic Saturation
• External Interferences
• Unbalanced and Asymmetric Structure
• Common Mode Noise

• Various Magnetic Encoders and Optical Encoders