Toyota to test silicon carbide (SiC) semi-conductors.
The tests, using a Camry hybrid saloon prototype and a hydrogen fuel cell-powered bus, will test Toyota's ability to produce more efficient electric powertrains.
Toyota's Camry Test vehicle Image: TMC |
Currently, semiconductors account for about 20% of a vehicle’s electrical losses. However, the new SiC type create less resistance when electricity flows through them, which could lead to greater overall powertrain efficiency.
The year-long test of the Camry will take place mainly in Toyota City, with Toyota installing SiC power semiconductors (transistors and diodes) in the PCU’s internal voltage step-up converter and the inverter that controls the motor.
Comparing the data collected from this test with standard silicon semi-conductors, should allow Toyota to directly assess any efficiencies gained from the new technology.
The fuel cell bus, which is in regular commercial operation in Toyota City, is already providing operating data.