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</o:shapelayout></xml><![endif]--></head><body lang=CS link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>There are four primary types of motor control methods for induction motors connected to VFDs: V/f (volts-per-hertz), V/f with encoder, open-loop vector, and closed-loop vector. These methods all use pulse-width modulation (PWM), a technique that varies the width of a fixed signal by modulating pulse durations to create a variable analog signal.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>induction motor = asynchronní motor, to celé je o řízení běžných asynchronních motorů..... vím, že 'induction motor' svádí k překladu indukční motor, ale není tomu tak... <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Hw-list [mailto:hw-list-bounces@list.hw.cz] <b>On Behalf Of </b>hwnews konference<br><b>Sent:</b> Tuesday, April 11, 2017 11:49 AM<br><b>To:</b> HW-news<br><b>Subject:</b> Re: Sloupová vrtačka - řízení otáček<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Tam ale neni o beznem asynchronnim motoru ani carka... ;-)<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>RV<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Dne 11. dubna 2017 10:56 Pavel Rotter <<a href="mailto:PavelRotter@newte.cz" target="_blank">PavelRotter@newte.cz</a>> napsal(a):<o:p></o:p></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><a href="http://machinedesign.com/motorsdrives/how-choose-right-control-method-vfds" target="_blank">http://machinedesign.com/motorsdrives/how-choose-right-control-method-vfds</a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Hw-list [mailto:<a href="mailto:hw-list-bounces@list.hw.cz" target="_blank">hw-list-bounces@list.hw.cz</a>] <b>On Behalf Of </b>hwnews konference<br><b>Sent:</b> Tuesday, April 11, 2017 10:50 AM<br><b>To:</b> HW-news<br><b>Subject:</b> Re: Sloupová vrtačka - řízení otáček</span><o:p></o:p></p></div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Chytrej vypocet dejme tomu, ale musi byt z ceho pocitat...<o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Co chcete snimat u asynchronnyho motoru? Vic nez maximalni proud mu dat nemuzete a sila motoru je urcena vicemen jen skluzem...<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>RV<o:p></o:p></p></div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p></div></div></div></div></div></div></div></div></div></div></div></div></body></html>