[picaboo]

Thanks a lot Chris.

I actually found a good thread that explains regen.

http://forums.mikeholt.com/showthread.php?t=101851 post#5.

The above article and your explanation together is making sense to me now. I was thinking that the VFD tries to revert the phase of U, V and W so that the flux starts moving in opp direction. But that is not true. The VFD slows down the frequency so much that the flux rotation speed becomes slower than the rotor speed so rotor leads the flux propagation. This results reversal of torque direction, which acts opposite to the vehicle inertia and slows the motor. I think I got the essence of it, right?

I also understand now that the generated AC current flows through the free wheeling diods to V+ terminal of the battery. But those are nearly sinusoid (with some ripple due to stator sloting) and 3 different phases. Since these are going through the diode, I guess only the positive portion of the sinusoid that is greater than (battery voltage + the forward biasing voltage) will make to the battery, correct? Still there is no smoothing. Does it not hurt the battery with such undulating voltage (when you superimpose upper half of three phase sinusoids, you get a undulating waveform), especially when it is Li-ion pack?

[ACEVS4US]

The capacitor banks and snubber caps take care of the ripple voltage

[etischer]

Got pulled over, and recorded it with my dashcam.

http://www.youtube.com/watch?v=Ex1kZ...yer_detailpage

[david85]

Guess he was a little ticked because you didn't let him in. However his lane wasn't ending so technically he had to yield to YOU (unless there was an emergency). If you closed the gap next to him, that's not breaking the law. He simply has to wait like everyone else.

You handled it well though. I like how he changed when he realized you had everything recorded.

[bjfreeman]

In Washington Statethat is a ticket.
the car in front of you was signaling to pull over and you cut him off.
ticket for unsafe lane change.
Glad you did not get one.
speaking from experience.

[TEV]

What kind of recording device are you using ? I like those date, time, speed ......... information on the video.

[JRP3]

Originally Posted by bjfreeman

In Washington Statethat is a ticket.
the car in front of you was signaling to pull over and you cut him off.
ticket for unsafe lane change.

I doubt any state has a law that the person signalling for a lane change has the right of way over the person already in that lane. Looked to me as if the cop intended to do the same maneuver that Eric did but was surprised by Eric already next to him. No ticket possible, and he knew it.
Eric, was he aware that he was being recorded? Also, do you always have a dash cam running?

[etischer]

This is the camera: Smarty BX1500+ HD 120

I have it set to always record, but you can set it up to only record when you press the record button or if it senses an impact, then it will save the previous 20 seconds and the next 20 seconds.

The software works really well, when you play back the video, it has other frames that show your car overlaid on google maps and has a graph of xyz acceleration.

I was pressing the record button while the officer was talking to me, the camera's right behind my mirror, so I'm sure he saw the camera.

[Weisheimer]

Originally Posted by etischer

Got pulled over, and recorded it with my dashcam.

So...it does show that your car has good acceleration!

It also looked like he "took it personally" to some degree...I suppose we all have had those days too.

I like the dashcam display and how it has all of the data down low and not all over the image.

Which dashcam are you using?

[etischer]

Originally Posted by Weisheimer

Which dashcam are you using?

This is the camera I bought, on ebay:

http://www.ebay.com/itm/ws/eBayISAPI...E:L:OU:US:1123