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	<title>Comments on: GM-Volt.com Interview With Tony Posawatz</title>
	<atom:link href="http://gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/feed/" rel="self" type="application/rss+xml" />
	<link>http://gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/</link>
	<description>Real-time news, information, and discussion about the Chevrolet Volt.</description>
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		<title>By: Guolin Wang</title>
		<link>http://gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/#comment-68682</link>
		<dc:creator>Guolin Wang</dc:creator>
		<pubDate>Thu, 18 Sep 2008 19:21:48 +0000</pubDate>
		<guid isPermaLink="false">http://www.gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/#comment-68682</guid>
		<description>I would suggest to add a Solar recharger on the roof top of the car. This is very suitable for those live in the sunny state and those who park their car outside on the sunny day during the work, ( say 6-8 hours). the battery would be fully charged after their work. In this way you can save more, a lot more. The roof top solar charger could be a sun roof type but the size should be larger. Please forward this idea to Mr.  Tony Posawatz. Thanks</description>
		<content:encoded><![CDATA[<p>I would suggest to add a Solar recharger on the roof top of the car. This is very suitable for those live in the sunny state and those who park their car outside on the sunny day during the work, ( say 6-8 hours). the battery would be fully charged after their work. In this way you can save more, a lot more. The roof top solar charger could be a sun roof type but the size should be larger. Please forward this idea to Mr.  Tony Posawatz. Thanks</p>
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		<title>By: Doodee</title>
		<link>http://gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/#comment-29373</link>
		<dc:creator>Doodee</dc:creator>
		<pubDate>Fri, 01 Feb 2008 18:09:23 +0000</pubDate>
		<guid isPermaLink="false">http://www.gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/#comment-29373</guid>
		<description>Thanks for sharing</description>
		<content:encoded><![CDATA[<p>Thanks for sharing</p>
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		<title>By: Oil Jihadi</title>
		<link>http://gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/#comment-7910</link>
		<dc:creator>Oil Jihadi</dc:creator>
		<pubDate>Tue, 18 Sep 2007 04:05:54 +0000</pubDate>
		<guid isPermaLink="false">http://www.gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/#comment-7910</guid>
		<description>Here&#039;s a few suggestions:

1. Suggest to GM to suggest to congress the concept of a minimum gas and diesel price, this would only protect and help GM with their electrical and hydrogen efforts. 

2. Wire the volt to handle 220v, but make the separate transformer an add-on product. So if somebody wants the feature, they pay a few hundred dollars for something a mechanic can install in 20 minutes. That way the cost of the car is reduced, but the 220v feature can be obtained.

3. Program the car&#039;s computer to delay the charging of the vehicle with the press of a button. When the car is switched to off, this option should pop up on the screen. This will allow the driver to take advantage of nighttime electricity rates. 

4. Any built in GPS should be utilized to figure out where the car is, so patterns can be detected. Going to work assumes you will be there a while. Going home after work assumes you will be there for a while too. Going home at lunchtime assumes you&#039;re not staying. Charging of the electricity and thee decision to turn on the generator can be influenced by the location. Privacy issues will exist, so set the &quot;learning&quot; feature to off by default. 


Join the Jihad against oil   www.oiljihad.org</description>
		<content:encoded><![CDATA[<p>Here&#8217;s a few suggestions:</p>
<p>1. Suggest to GM to suggest to congress the concept of a minimum gas and diesel price, this would only protect and help GM with their electrical and hydrogen efforts. </p>
<p>2. Wire the volt to handle 220v, but make the separate transformer an add-on product. So if somebody wants the feature, they pay a few hundred dollars for something a mechanic can install in 20 minutes. That way the cost of the car is reduced, but the 220v feature can be obtained.</p>
<p>3. Program the car&#8217;s computer to delay the charging of the vehicle with the press of a button. When the car is switched to off, this option should pop up on the screen. This will allow the driver to take advantage of nighttime electricity rates. </p>
<p>4. Any built in GPS should be utilized to figure out where the car is, so patterns can be detected. Going to work assumes you will be there a while. Going home after work assumes you will be there for a while too. Going home at lunchtime assumes you&#8217;re not staying. Charging of the electricity and thee decision to turn on the generator can be influenced by the location. Privacy issues will exist, so set the &#8220;learning&#8221; feature to off by default. </p>
<p>Join the Jihad against oil   <a href="http://www.oiljihad.org" rel="nofollow">http://www.oiljihad.org</a></p>
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		<title>By: Dave G</title>
		<link>http://gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/#comment-7628</link>
		<dc:creator>Dave G</dc:creator>
		<pubDate>Fri, 14 Sep 2007 14:25:38 +0000</pubDate>
		<guid isPermaLink="false">http://www.gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/#comment-7628</guid>
		<description>OK, I found a blog by Wally Rippel, Principal Power Electronics Engineer at Tesla Motors:
http://www.teslamotors.com/blog4/?p=45

Wally Rippel says:
&quot;My conclusion is that DC brushless drives will likely continue to dominate in the hybrid and coming plug-in hybrid markets, and that induction drives will likely maintain dominance for the high-performance pure electrics.&quot;

So it may be that Tesla will use a DC brushless drive for their BlueStar.

Wally also says:
&quot;Induction machines are more difficult to control. The control laws are more complex and difficult to understand. Achieving stability over the entire torque-speed range and over temperature is more difficult with induction than with DC brushless. This means added development costs, but likely little or no recurring costs.&quot;

This tells me that GM would get the Volt out sooner with a DC brushless motor.</description>
		<content:encoded><![CDATA[<p>OK, I found a blog by Wally Rippel, Principal Power Electronics Engineer at Tesla Motors:<br />
<a href="http://www.teslamotors.com/blog4/?p=45" rel="nofollow">http://www.teslamotors.com/blog4/?p=45</a></p>
<p>Wally Rippel says:<br />
&#8220;My conclusion is that DC brushless drives will likely continue to dominate in the hybrid and coming plug-in hybrid markets, and that induction drives will likely maintain dominance for the high-performance pure electrics.&#8221;</p>
<p>So it may be that Tesla will use a DC brushless drive for their BlueStar.</p>
<p>Wally also says:<br />
&#8220;Induction machines are more difficult to control. The control laws are more complex and difficult to understand. Achieving stability over the entire torque-speed range and over temperature is more difficult with induction than with DC brushless. This means added development costs, but likely little or no recurring costs.&#8221;</p>
<p>This tells me that GM would get the Volt out sooner with a DC brushless motor.</p>
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		<title>By: Dave G</title>
		<link>http://gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/#comment-7618</link>
		<dc:creator>Dave G</dc:creator>
		<pubDate>Fri, 14 Sep 2007 13:15:13 +0000</pubDate>
		<guid isPermaLink="false">http://www.gm-volt.com/2007/09/13/gm-voltcom-interview-with-tony-posawatz/#comment-7618</guid>
		<description>I don&#039;t know much about the guts of the electric motor, and many folks on this site seem upset that the Volt is using DC.

Can someone explain the issues with a DC motor?

I&#039;m looking on Wikipedia:
http://en.wikipedia.org/wiki/Brushless_DC_electric_motor
and they don&#039;t seem to point out any huge downsides.  In fact, they say:
&quot;Although burshless DC motors are practically identical to permanent magnet AC motors, the controller implementation is what makes them DC. While AC motors feed sinusoidal current simultaneously to each of the legs (with an equal phase distribution), DC controllers only approximate this by feeding full positive and negative current to two of the legs at a time. The major advantage of this is that both the logic controllers and battery power sources operate on DC, such as in computers and electric cars.&quot;

I suspact that if you had a true AC motor, that would require a more complex circuit to convert the DC battery voltage to variable rate AC to run the motor.  This would seem to add cost and weight, but again I&#039;m no expert.

Can someone explain the difference from a driver&#039;s perspective?</description>
		<content:encoded><![CDATA[<p>I don&#8217;t know much about the guts of the electric motor, and many folks on this site seem upset that the Volt is using DC.</p>
<p>Can someone explain the issues with a DC motor?</p>
<p>I&#8217;m looking on Wikipedia:<br />
<a href="http://en.wikipedia.org/wiki/Brushless_DC_electric_motor" rel="nofollow">http://en.wikipedia.org/wiki/Brushless_DC_electric_motor</a><br />
and they don&#8217;t seem to point out any huge downsides.  In fact, they say:<br />
&#8220;Although burshless DC motors are practically identical to permanent magnet AC motors, the controller implementation is what makes them DC. While AC motors feed sinusoidal current simultaneously to each of the legs (with an equal phase distribution), DC controllers only approximate this by feeding full positive and negative current to two of the legs at a time. The major advantage of this is that both the logic controllers and battery power sources operate on DC, such as in computers and electric cars.&#8221;</p>
<p>I suspact that if you had a true AC motor, that would require a more complex circuit to convert the DC battery voltage to variable rate AC to run the motor.  This would seem to add cost and weight, but again I&#8217;m no expert.</p>
<p>Can someone explain the difference from a driver&#8217;s perspective?</p>
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