car alternator as motor

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I BOUGHT TWO 90-100A SS ESC FOR MY HUSBAND FOR A PROJECT HE IS WORKING ON.HE TRIED PROGRAMMING THE FIRST OFF A 12V LEAD ACID BATTERY AND FRIED IT. THE SECOND HE USED A 6V BATTERY CHARGER AND WAS ABLE TO PROGRAM IT EVEN WITH THE BEEPS BEING VERY SOFT.ONCE HE EXITED THE PROGRAM MODE AND TRIED TO RUN THE CONVERTED CAR ALTERNATOR IT WOULD TURN FOR ABOUT 7SECONDS AT ABOUT300RPM THEN STOP UNTIL HE WENT BACK DOWN WITH THE TROTTLE.THEN HAPPEN AGAIN EACH TIME.MY QUESTION IS COULD THE SENSORLESS ESC BE LOOKING FOR  FEEDBACK THAT IT RECOGNIZES AND NOT SEEING IT? THE ALTERNATOR IS 14 POLE WYE CONNECTED WITH CONSEQUENTIAL POLE CONNECTION(7 POLES ALL OF THE SAME POLARITY THAT CREAT OPPOSITE POLES INBETWEEN THEM)

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magnetic mary Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (US) USERID: 778756 Newbie Joined: 23/Jun/2011 Online Status: Offline Posts: 12	Quote Reply Topic: car alternator as motor Posted: 23/Jun/2011 at 12:05pm
	I BOUGHT TWO 90-100A SS ESC FOR MY HUSBAND FOR A PROJECT HE IS WORKING ON.HE TRIED PROGRAMMING THE FIRST OFF A 12V LEAD ACID BATTERY AND FRIED IT. THE SECOND HE USED A 6V BATTERY CHARGER AND WAS ABLE TO PROGRAM IT EVEN WITH THE BEEPS BEING VERY SOFT.ONCE HE EXITED THE PROGRAM MODE AND TRIED TO RUN THE CONVERTED CAR ALTERNATOR IT WOULD TURN FOR ABOUT 7SECONDS AT ABOUT300RPM THEN STOP UNTIL HE WENT BACK DOWN WITH THE TROTTLE.THEN HAPPEN AGAIN EACH TIME.MY QUESTION IS COULD THE SENSORLESS ESC BE LOOKING FOR FEEDBACK THAT IT RECOGNIZES AND NOT SEEING IT? THE ALTERNATOR IS 14 POLE WYE CONNECTED WITH CONSEQUENTIAL POLE CONNECTION(7 POLES ALL OF THE SAME POLARITY THAT CREAT OPPOSITE POLES INBETWEEN THEM)

airwave Members Profile Send Private Message Find Members Posts Add to Buddy List Retail (US) USERID: 71296 Hobbyking Addict Joined: 27/Aug/2009 Online Status: Offline Posts: 2792	Quote Reply Posted: 23/Jun/2011 at 4:30pm
	Yes it could be this , even sensorless have magnets that pulse the esc to some voltage. the esc is a Brushless dc motor not for a ac motor. it may also be the esc is looking for the motor to start and reduce the current needed. after 7 sec it cuts of to protect the ESC. Edited by airwave - 24/Jun/2011 at 11:13am

magnetic mary Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (US) USERID: 778756 Newbie Joined: 23/Jun/2011 Online Status: Offline Posts: 12	Quote Reply Posted: 25/Jun/2011 at 9:58am
	THANKS FOR THE INFORMATION.I AM EXCITING THE FIELD SO IT SHOULD NOT KNOW IF THE CEMF IS COMING FOR PERMENANT MAGNETS OR ELECTRO- MAGNETS. I ALSO READ THAT A WYE CONNECTION TENDS TO FIGHT ITSELF.I MIGHT TRY CHANGING THE CONNECTION TO DELTA. ARE MOST OF THE COMMON RC BRUSHLESS MOTORS CONNECTED WYE OR DELTA?THIS IS MARY'S HUSBAND.I HAD NO PURCHASES CAUSE SHE HAS THE PAY PAL ACCOUNT EBAY YA KNOW. THANKS AGAIN DYNAMO DAVE

airwave Members Profile Send Private Message Find Members Posts Add to Buddy List Retail (US) USERID: 71296 Hobbyking Addict Joined: 27/Aug/2009 Online Status: Offline Posts: 2792	Quote Reply Posted: 01/Jul/2011 at 7:56pm
	yes it would not matter if they are PM magnets are not

Owll56 Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (AU) USERID: 784536 Hobbyking Addict Joined: 30/Apr/2011 Location: Melbourne Online Status: Offline Posts: 600	Quote Reply Posted: 01/Jul/2011 at 8:23pm
	Hi Magnetic Mary Yes you will have to change the windings from star (wye) to delta. Also with the field winding the more power appied to it the more torque it will have but the RPM will be lower, so to go faster you lower the power applied to the field and the RPM will increase, this can be done with high power resistors or variable type power supply. From memory the field will draw less than 3 amps. Hope this will help your project.
	DOH! Gravity

magnetic mary Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (US) USERID: 778756 Newbie Joined: 23/Jun/2011 Online Status: Offline Posts: 12	Quote Reply Posted: 05/Jul/2011 at 5:40am
	THANKS FOR THE INFORMATION THE FIELDS ARE BEING EXCITED WITH 2.4AMPS THAT I AM GETTING FROM TAPPING OFF ONE OF THE 12VOLT BATTERIES AND RUNNING IT THROUGH A 1.82 OHM IGNITION COIL RESISTOR.ONE MORE QUESTION WHEN I PLUGGED IN MY NEWEST ESC TO THE SERVO TESTER I PLUGGED IT IN UPSIDE DOWN. I FOUND MY MISTAKE AND TURNNED IT BACK OVER BUT NOW AFTER THE THIRD PROGRAM MODE THE TONES GO WEIRD. DID I HURT IT? GUESS I DID NOT DO IT ANY GOOD.

magnetic mary Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (US) USERID: 778756 Newbie Joined: 23/Jun/2011 Online Status: Offline Posts: 12	Quote Reply Posted: 08/Jul/2011 at 9:59am
	TODAY I CHANGED THE WINDING FROM STAR TO DELTA ADJUSTED SOME OF THE PARAMETERS AND GOT THE ALTERNATOR TO TURN UNDER THROTTLE. FOR THE FIRST TIME. STILL HAVE SOME TUNNING TO DO BUT IT IS A LIVE. THNAKS FOR THE HELP

Owll56 Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (AU) USERID: 784536 Hobbyking Addict Joined: 30/Apr/2011 Location: Melbourne Online Status: Offline Posts: 600	Quote Reply Posted: 08/Jul/2011 at 11:07am
	Glad my information helped.
	DOH! Gravity

Beladog Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (US) USERID: 301604 Forum Admin BELAMOD Joined: 01/Feb/2010 Location: San Diego USA Online Status: Offline Posts: 2427	Quote Reply Posted: 08/Jul/2011 at 1:10pm
	full torque? Good Job! fwiw, typing in all caps is the same as YELLING.
	Thats the ugliest hat Ive ever seen...looks good on you though.

magnetic mary Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum (US) USERID: 778756 Newbie Joined: 23/Jun/2011 Online Status: Offline Posts: 12	Quote Reply Posted: 10/Jul/2011 at 12:19pm
	Thank you . I still have some tunning to do and I need to come up with a better test jig. I am running it 15 degrees now I will try 30 and see if that is better. The speed is also slow I am guessing around 600rpm I will change the cell count and try 24 volts.Hoping the blue smoke does not happen again.