Beyond 50 MHz Bandwidth Extension of Commercial DC-Current Measurement Sensors With Ultra-Compact PCB-Integrated Pickup Coils

Current Sensor Integration Issues with Wide-Bandgap Power Converters

“…Ultimately, the selection of a sensing arrangement should be based on the specific requirements of the application. Historically, hybrid configurations have been underutilized in a variety of power electronics applications, in which two single-scheme current-measurement methods are combined to compensate for their limited bandwidth [ 14 , 38 , 48 , 49 , 88 , 89 , 90 , 91 , 92 ]. Using hybrid (or dual-scheme) configurations can increase the accuracy, speed, and BW of a sensing system, which is especially beneficial in high-frequency applications as a single measurement method may not provide enough BW [ 14 ].…”

“…The current-sensing bandwidth refers to the range of frequencies over which a sensor can accurately measure current, and its requirements can vary depending on the application and the specific type of current or equipment being measured. Typically, higher BW current sensors are required in WBG power electronics due to the faster switching frequency and sharper turn-on/off characteristics [14,30,[47][48][49][50][51][52], where the BW should be set wide enough to capture the HF components of current waveforms [11,12]. As well, the switch-current waveform can be square/trapezoidal with frequency components ranging from DC to extremely high frequencies [12], and the only single-scheme current sensor capable of measuring DC up to tens of MHz (or GHz) is the coaxial shunt [20], which has integration problems relating to isolation and invasiveness.…”

Three-Phase Motor Inverter and Current Sensing GaN Power IC

“…This work focuses only on current-mirror sensing; other current sensing methods such as shunt-sensor [ 39 , 40 , 41 , 42 , 43 ] or hall-sensor [ 44 ] integration, as well as related magnetic flux concentrators [ 45 ] or magnetic sensors [ 46 ], were also demonstrated in GaN technologies. External current sensors or two-chip solutions (GaN and Si) are also often used and investigated for GaN power electronics [ 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ]. State-of-the-art low-voltage GaN motor inverters today still use at least three half-bridge ICs and three sense resistors [ 3 , 58 , 59 ].…”

Measurement of Power Frequency Current including Low- and High-Order Harmonics Using a Rogowski Coil

“…Hence, several Rogowski coil designs have been suggested in the literature. The Printed Circuit Board (PCB) design [24][25][26][27][28][29] is one of the most recent designs increasing the spread of Rogowski coil use in several electronic applications, as this design increases its suitability to be integrated with electronic systems and devices. On the other hand, Rogowski coil measurements can show some deviations from the expected values due to positional errors [30].…”