tag:blogger.com,1999:blog-1842294696495961750.post7551892227700169522..comments2020-11-26T01:45:15.792-05:00Comments on EPhase: Why I Bought TSLAJPhttp://www.blogger.com/profile/01351893617814995335noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-1842294696495961750.post-73371591623012301192011-09-10T14:04:00.519-04:002011-09-10T14:04:00.519-04:00You're really knocking yourself out with misin...You're really knocking yourself out with misinformation aren't you? Tesla no longer uses the ACP unit nor do they license the rights, they've come up with their own design. I highly doubt their controller weighs anywhere near what you claim since I've seen more powerful controllers that weigh much less. The old ACP unit used to include a DC/DC inverter and battery charger as well, it was not just the motor controller. I'm well aware of the Roadster history, but thanks anyway.JPhttps://www.blogger.com/profile/01351893617814995335noreply@blogger.comtag:blogger.com,1999:blog-1842294696495961750.post-27557301401592567072011-09-10T12:08:41.494-04:002011-09-10T12:08:41.494-04:00JP writes about the Tesla motor, " At 70lbs, ...JP writes about the Tesla motor, " At 70lbs, 250hp, and 300 ft/lbs of torque they have the best power to weight ratio of any production EV motor."<br />The claim of 70lbs weight is deceptive and actually wholly false. What weighs 70lbs is just the motor iron and it can't run without the electronic motor controller. The huge electronic controller sits between the battery and the motor and generates and distributes the polyphase currents among the three phase windings. This controller must be able to handle over 250KW of power, a huge amount, using pretty massive solid state components. The controller for the Tesla motor weighs in at about 150 lbs and must be considered as part of the motor.<br />While the combination still gives pretty impressive numbers, it seems that Tesla and Musk must always overhype their capabilities, but to the detriment of their credibility.<br />Incidentally, the motor and controller design were purchased from the real designer, Alan Ciccone, and his company, AC Propulsion. The basic Roadster design was also purchased from AC Propulsion and is based on that company's Tzero sports car. <br />ZelazaAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-1842294696495961750.post-71958487277847522142011-08-25T13:32:14.909-04:002011-08-25T13:32:14.909-04:00Yes, though typically industrial motors are rated ...Yes, though typically industrial motors are rated at continuous power not peak, so that may explain part of the difference. I am puzzled by most OEM's still using PM motors instead of induction, but they may have an advantage in startup torque in relation to current. Mate Rimac has gone with PM motors instead of induction for his supercar, which surprised me since I know he was working on induction motors as well.<br />http://www.rimac-automobili.com/prelaunch/<br />I guess he hasn't figured out all of Tesla's tricks yet.JPhttps://www.blogger.com/profile/01351893617814995335noreply@blogger.comtag:blogger.com,1999:blog-1842294696495961750.post-53676595383264973102011-08-25T11:05:46.774-04:002011-08-25T11:05:46.774-04:00A friend who builds portable industrial fans said ...A friend who builds portable industrial fans said that they cannot find anything that even approaches the power to weight /size ratio of Tesla's motor. Something on the order of 10 times. Another part of Tesla's secret sauce -one that no one talks about.vfxhttps://www.blogger.com/profile/17374947704873793916noreply@blogger.comtag:blogger.com,1999:blog-1842294696495961750.post-20027427130786019262011-08-22T08:27:24.938-04:002011-08-22T08:27:24.938-04:00I grabbed some more on the drop as well, will prob...I grabbed some more on the drop as well, will probably do the same if there is another dip.<br />If you haven't seen it there is a great piece on Elon Musk and Tesla, about an hour long.<br />http://green.autoblog.com/2011/08/17/bloomberg-risk-takers-takes-on-tesla-ceo-elon-muskJPhttps://www.blogger.com/profile/01351893617814995335noreply@blogger.comtag:blogger.com,1999:blog-1842294696495961750.post-38165997884499027552011-08-21T23:53:07.442-04:002011-08-21T23:53:07.442-04:00JP - Awesome post about Tesla, you have been a ver...JP - Awesome post about Tesla, you have been a very patient investor. I bought in in late 2010 and again just recently when the share price dipped to 22.80. <br /><br />Secretly I hope the share price has another dip before the model X is announced later this year, after that point i see this stock gaining momentum as the production signature model S vehicles start rolling out in 2012.betterfuturehttps://www.blogger.com/profile/07138715686928509629noreply@blogger.comtag:blogger.com,1999:blog-1842294696495961750.post-34417707727451615332011-01-30T13:55:28.826-05:002011-01-30T13:55:28.826-05:00JP - Interesting article. I'm not a car guy a...JP - Interesting article. I'm not a car guy and wasn't an EV enthusist until I computer researched and read about Tesla in Nov 2007. As a retired Air Force guy who has a nephew currently serving his third tour in the middle east, I was looking for a way to get off of the oil vehicle merry-go-round. I bought a Tesla Roadster (#562) and have been using it as my only vehicle since Aug 2009. I bought a few shares of the IPO against my brokers advice and have held on to them through the ups and down of the first half year. As you are much more an expert in the EV world than am I,I hope your vision of Tesla is the correct one and they do in fact lead this technology for years to come.rsquared99noreply@blogger.com