Economy for Last Week and Full Current at Stall

Power economy was pretty similar to last week.

Week ending 19th April 2013:
Monday 11.86 for 48.92 km => 145 Wh/km
Tuesday 10.1 AH for 48.1 km => 126 Wh/km
Wednesday 7.33 for 34.12 km => 129 Wh/km
Thursday 9.93 AH for 39.5 km => 151 Wh/km
Friday 10.75 AH for 47.83 km => 135 Wh/km

All battery to wheel.
Thursday was the day I recorded serial logs. Typical that it was the worst day.
The Vogue has now traveled 636 km as an EV.

Friday I played around with different PWM frequencies. I hadn't realised that I wasn't getting full current at stall until I tried 4 kHz flat-top (see previous post). Suddenly I got good acceleration from stationary. The only problem is that 4 kHz is annoying. I tried a few combinations during the day and was only on the last trip to Doncaster (up a significant hill) to pick up William (son) that I tried the last pre-supplied switching frequency combination.

It's 8 kHz SIN auto-switching to 2 kHz  when current exceeds the 8 kHz limited value.
It works perfectly. I had full current from standstill, same as the 4 kHz configuration but no noise when not heavily accelerating. Unlike the 16/8/2 kHz configuration, it apparently applies the correct current limits when switching PWM frequencies.

It made a huge difference. There was a small hill turning out of a driveway that William and I had always wondered if the Vogue would handle once it was going (challenges of direct drive). It was no problem. It may have been another story with the 16/8/2 kHz configuration that I have been running since the car was on the road.

I'm not driving the Vogue this week. I have decided that I'm shaking it to bits (a couple of the chargers have rattled their voltage output down by half a volt or so - trimpot movement) and I need it going for Sunday. With Thursday a public holiday here, I'll do the axle stand thing again and check out Richo's (AEVA) theory that it may be resonance in the motor cradle. I'll also be a lot more critical of which end the vibration is coming from.