8-bit Microcontrollers中的主题 Need help，MC3PHAC https://community.nxp.com/t5/8-bit-Microcontrollers/Need-help-MC3PHAC/m-p/138749#M5088 <HTML><HEAD></HEAD><BODY><DIV>I made a A/C motor drive board with MC3PHAC. The motor's rating is 220V/750W. Now the question is, when the motor runs at high speed(3000rpm/50Hz), everything is ok, but when it runs at 500rpm or slower, both the igbts and the motor become very hot. I don't know why? Can someone help me? Thanks!</DIV></BODY></HTML> Mon, 02 Jul 2007 10:50:01 GMT sunny 2007-07-02T10:50:01Z Need help，MC3PHAC https://community.nxp.com/t5/8-bit-Microcontrollers/Need-help-MC3PHAC/m-p/138749#M5088 <HTML><HEAD></HEAD><BODY><DIV>I made a A/C motor drive board with MC3PHAC. The motor's rating is 220V/750W. Now the question is, when the motor runs at high speed(3000rpm/50Hz), everything is ok, but when it runs at 500rpm or slower, both the igbts and the motor become very hot. I don't know why? Can someone help me? Thanks!</DIV></BODY></HTML> Mon, 02 Jul 2007 10:50:01 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/Need-help-MC3PHAC/m-p/138749#M5088 sunny 2007-07-02T10:50:01Z Re: Need help，MC3PHAC https://community.nxp.com/t5/8-bit-Microcontrollers/Need-help-MC3PHAC/m-p/138750#M5089 <HTML><HEAD></HEAD><BODY>Can u send schematic? or attach here?</BODY></HTML> Fri, 02 Oct 2009 05:33:47 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/Need-help-MC3PHAC/m-p/138750#M5089 nedemek 2009-10-02T05:33:47Z Re: Need help，MC3PHAC https://community.nxp.com/t5/8-bit-Microcontrollers/Need-help-MC3PHAC/m-p/138751#M5090 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P>please help me i got stucked in sending the commands to mc3phac.it is not responding anything.</P><P></P><P>please help me........</P><P></P><P>thanks,</P><P>Poornima</P></BODY></HTML> Fri, 15 Mar 2013 10:40:27 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/Need-help-MC3PHAC/m-p/138751#M5090 poornirohit 2013-03-15T10:40:27Z