Hall Effect against Shunt Sensing on the High Side
High-side shunts deliver superior low-current accuracy under high temperatures, while integrated Hall sensors reduce high-current thermal power loss.
Phase Shift Latency
Phase Delay
Time-domain angular lag defines the phase difference between an analog input signal and its digital or analog output representation at a given frequency. Reducing phase shift latency is essential in high-speed closed-loop control systems where signal delay degrades feedback loop stability margins. Measurements are expressed in degrees or microseconds.
Group Delay
Digital filtering, isolation barriers, and amplifier bandwidth limitations introduce cumulative group delay in current measurement chains. Elevated phase shift latency causes phase margin erosion in fast inverter control loops, leading to torque ripple or control instability. Higher sampling rates and low-order filtering reduce overall delay at the cost of higher high-frequency noise.
Control Loop
Wide-bandwidth current transducers require tight phase response specs across full operating bandwidths to ensure accurate power factor calculations. Evaluating phase shift latency involves sweeping sinusoidal input signals through target frequency spectra while measuring input-to-output zero-crossing time offsets. Phase compensation algorithms inside controllers adjust timing registers to correct for known sensor phase lag.
Excessive phase shift causes significant real-power calculation errors in electrical power meters.
Filter Delay
Analog propagation delays combine with digital decimation filter group delays to determine total channel latency. Quantifying phase shift latency enables precise software-based phase alignment in multi-channel measurement hardware.