Quote:
Originally Posted by haroldo
For the benefit of those with short attention spans...is it good or is it bad?
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All Good. The first thing I did after reading it was save it to my own hard drive. Basically, without taking any inovation away from the Prius, the report reveals the fact that the Camry HSD is newer, and that Toyota took advantage of what they learned in the Prius to improve the HSD in the Camry.
Here is a summary (for those with short attention spans):
Table 4.1. 2007 Camry/2004 Prius design comparison highlights
Parameter /Camry /Prius/ Comments
Transaxle
Motor power rating./ 70 kW /50 kW/Published Camry power rating
is likely a combination of motor and generator ratings.
Motor lamination stack length./ 6.07 cm (2.39″) /8.40 cm (3.3″) /Reduced by 2.33 cm (0.91″).
Motor mass./ 41.1 kg /45.0 kg /8.6% reduction.
Motor volume./ 11.8 L/ 15.4 L/ 23.3% reduction.
Motor specific power./ 2.6 kW per kg/ 1.11 kW per kg/ Improved by a factor of 2.8.
Motor power density. 8.9 kW per L/ 3.3 kW per L/ Improved by a factor of 2.7.
Equivalent torque rating./ 667 Nm /400 Nm/ Camry torque value from speed reduction gear.
Motor speed rating./ 14,000 rpm /6,000 rpm
Motor winding configuration./ Parallel /Series
Power split.
PCU
Nominal battery voltage./ 244.8 V/ 201.6 V /Up to 20% higher during
operation.
Maximum dc-link voltage./ 650 Vdc/ 500Vdc
Boost converter power rating./ 30 kW/ 20 kW
Filter capacitor (battery level)./ 500 Vdc,378
μF/600 Vdc,282 μF
Smoothing capacitor (boosted level)./750 Vdc, 2098 μF/600 Vdc, 1,130 μF
Entire PCU mass./ 17.86 kg/ 21.2 kg/ 15.8% reduction.
Entire PCU volume. /11.7 L/ 17.8 L
Prius PCU includes 12V dc-dc and compressor inverter, Camry PCU does not.
Motor inverter mass./ 7.5 kg/ 8.8 kg/ 14.7% reduction.
Motor inverter volume./ ~6 L/ 8.7 L/ 31% reduction.
Motor inverter specific power./ 9.3 kW per kg/ 5.7 kW per kg /Improved by a factor of 2.8.
Motor inverter power density./ 11.7 kW per L/ 5.7 kW per L/ Improved by a factor of 1.3.
Boost converter mass./ 6.6 kg/ 4.8 kg /37.5% increase.
Boost converter volume./ 3.5 L/ 5.1 L /31.3% reduction.
Boost converter specific power./ 4.5 kW per kg/ 4.2 kW per kg/ Improved by a factor of 1.07.
Boost converter power density./ 8.6 kW per L/ 3.9 kW per L/ Improved by a factor of 2.21.