Hall-Effect Sensor Technique for No Induced Voltage in AC Magnetic Field Measurements Without Current Spinning

Accurately sensing AC magnetic field signatures poses a series of challenges to commonly used Hall-effect sensors. In particular, induced voltage and lack high-frequency spinning methods are bottlenecks in the measurement fields. We describe technique that can be implemented two ways: 1) current driving sensor is oscillating at same frequency as field, signal measured second harmonic frequency, 2) preset, plus current. This method has potential advantages over traditional means measuring fields power systems (e.g., motors, inverters), it reduce components needed (subsequently reducing overall cost size) not bandwidth limited by spinning. The produces no results low offset, thus preserving accuracy precision measurements. Experimentally, we have shown offset values between 8 27 μT frequencies ranging from 100 Hz 1 kHz, validating this both cases.