Microchannel-based Calorimeter for Rapid and Accurate Loss Measurements on High-efficiency Power Converters

Erp, Remco van; Perera, Nirmana; Matioli, Elison

doi:10.1109/ecce47101.2021.9595598

Cited by 2 publications

(2 citation statements)

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“…5 illustrates. A pressure controller is used to pass deionized water through the microchannels embedded in the cold plate [23]. The cold plate is brought in to good thermal contact with the circuit using thermal grease, which enables a high level of heat extraction in a small form factor [24].…”

Section: A Calorimetric Measurements and Calorimeter Designmentioning

confidence: 99%

“…The system can measure a wide power range of 20 mW to 10 W; this is especially beneficial as 𝐸 diss vary quite significantly between different device structures and with 𝑓 sw [7]. A complete discussion on the design, operation and performance of the calorimeter is presented in a companion paper [23].…”

Section: A Calorimetric Measurements and Calorimeter Designmentioning

confidence: 99%

See 1 more Smart Citation

Active-Device Losses in Resonant Power Converters: A Case Study with Class-E Inverters

Perera

Erp

Ancay

et al. 2021

2021 IEEE Energy Conversion Congress and Exposition (ECCE)

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Recent research has reported an undesirable OFFstate loss in high-frequency soft-switching power converters, such as resonant converters. This loss is attributed to a hysteresis loss related to the charging-discharging process of the output capacitance of the power transistor. However, precise estimation of transistor power loss and its breakdown into ON-state and OFF-state losses is challenging in the MHz-range operation due to the small circuit size, parasitic effects, and limited accuracy in existing methods to measure low-loss systems. We present a measurement concept to perform a complete loss breakdown of MHz-range resonant converters, as well, directly determine the OFF-state losses in transistors, which is demonstrated for a GaNbased class-E inverter operating at 10 MHz. A novel and compact calorimeter was designed to measure the converter active-device losses down to 20 mW within a 5 % error. This measured loss is then separated into four components using a combination of average and instantaneous electrical measurements: transistor ON-state loss, transistor OFF-state loss, gate-driver internal loss and gate loss. A simple no-load technique was devised to evaluate the gate-driver internal loss. The proposed approach directly determines output-capacitance hysteresis losses during the actual converter operation, which is not possible with existing measurement methods. The presented knowledge of individual loss components permits better optimization of MHz-range power converters.

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Section: A Calorimetric Measurements and Calorimeter Designmentioning

confidence: 99%

Section: A Calorimetric Measurements and Calorimeter Designmentioning

confidence: 99%