Posts Tagged: Power Electronics

SiC vs GaN semiconductors for EV power converters: Tech Opinion

Just as engineers are starting to get used to the advantages (and quirks) of silicon carbide (SiC ) devices, another semiconductor material joins the fray: gallium nitride, or GaN. Though there are some superficial similarities between these two materials, and even some overlap in their areas of best use, it is my opinion that only… Read more »

BorgWarner unveils new onboard battery charger

Automotive parts supplier BorgWarner has released a silicon carbide onboard battery charger that is compatible with 400, 600 and 800 V systems. It accepts AC inputs with 7.4 kW, 11 kW, and 22 kW power ratings. Optional DC-to-DC converter rating integration from 2.3 kW to 3.6 kW is available. “Our technical center is dedicated to… Read more »

ROHM introduces 1,200 V IGBTs for compressors and heater circuits

Electronic parts maker ROHM has announced four new automotive-grade 1,200 V-rated insulated-gate bipolar transistors (IGBTs) for inverters used in electronics compressors and for switching circuits used in positive temperature coefficient (PTC) heaters. The IGBTs feature a short-circuit resistance of 10 μsec (Tj=25° C). ROHM says the devices’ unique structure reduces VCE(sat) to 1.70 V, which… Read more »

Fraunhofer develops GaN power ICs with integrated sensors

Researchers from the Fraunhofer Institute have integrated current and temperature sensors, 600 V-class power transistors, freewheeling diodes, and gate drivers onto a gallium nitride (GaN)-based semiconductor chip. The new circuit measures 4 x 3 mm and enables high switching frequencies and a high power density, while providing fast and accurate condition monitoring, according to the… Read more »

A closer look at the losses in power semiconductors

A previous article examined loss mechanisms in traction motors, which tend to be the single biggest source of losses in a modern EV drivetrain. This time, the focus is on the various power semiconductors, as they are the next biggest source of losses. Also covered in brief are ways to mitigate these losses and design… Read more »

New automated vacuum pressure soldering system for IGBT power modules

SST Vacuum Reflow Systems, a subsidiary of photonics and microelectronic company Palomar Technologies, has launched the SST 8300 Series Automated Vacuum Pressure Soldering System for IGBT power modules in high-reliability automotive and commercial applications. Offered in either single- or triple-chamber systems, the series enables above average void rates, heating up to 500° C, and fast… Read more »

Dana launches new integrated motor and inverter

Dana has launched the TM4 MOTIVE, an integrated motor and inverter for the light vehicle market. The TM4 MOTIVE includes a high-RPM permanent magnet electric motor, power-dense electronic inverter, and advanced controls. The system weighs 110 pounds and is scalable up to 150 kW and 11,000 rpm, according to the company. The integrated inverter is… Read more »

Fraunhofer and Hitachi Metals create on-board charger with 3.8 kW/l power density

The Fraunhofer Institute and Hitachi Metals say they’ve produced an on-board charger (OBC) prototype that delivers both high power output and compactness by using soft magnetic materials developed by Hitachi. Hitachi says the technology enables the OBC prototype to generate a power density of 3.8 kW/l. Hitachi explains that there is typically a trade-off between… Read more »