【正文】 ncy 3xFLC A 1470 191 600 263 93 B 1475 184 600 190 C 1475 191 570 150 92 D 1480 187 660 190 E 1470 185 550 120 92 36 F 1470 191 670 150 93 G 1480 190 780 200 94 H 1475 182 850 220 I 1480 190 670 120 94 24 Torque is reduced by the square of the current reduction. 扭矩減少值是電流降底值的平方。 LRC amp。 LRT。 Start Torque 起動扭矩 Motor Speed FLC LRC LRT % FL Torque (rpm) (amps) (%FLC) (%FLT) Ef’ncy 3xFLC A 1470 191 600 263 93 B 1475 184 600 190 C 1475 191 570 150 92 D 1480 187 660 190 E 1470 185 550 120 92 36 F 1470 191 670 150 93 G 1480 190 780 200 94 H 1475 182 850 220 I 1480 190 670 120 94 24 LRT ranges from 120% to 263% Sample Of Typical 110kW Motors Motor Start Theory 8 LRC amp。 LRT levels vary considerably between motors. LRT等級在各個電機間有顯著變化。 In the example, Motor H will draw 55% more current at start than Motor E. 在實例中，電機 H引入的起動電流比電機 E多 55%。 Typical Motor Data 典型電機數(shù)據(jù) Motor Speed FLC LRC LRT % FL Torque (rpm) (amps) (%FLC) (%FLT) Ef’ncy 3xFLC A 1470 191 600 263 93 B 1475 184 600 190 C 1475 191 570 150 92 D 1480 187 660 190 E 1470 185 550 120 92 36 F 1470 191 670 150 93 G 1480 190 780 200 94 H 1475 182 850 220 I 1480 190 670 120 94 24 Sample Of Typical 110kW Motors Motor Start Theory 6 Maximum motor start current under full voltage start conditions is defined by the motor‘s Locked Rotor Current (LRC). 全電壓起動條件下最大電機起動電流是由電機鎖定轉(zhuǎn)子電流（ LRC） 確定的。 Motor Performance 電機性能 Motor Start Theory 5 A motor‘s start performance can be identified by examining the motor data sheet. 電機起動性能可通過檢查電機數(shù)據(jù)表得到確認(rèn)。 Stator design affects full speed performance. 定子的設(shè)計影響全速性能。 Soft Start Motor Start Theory 3 A motor‘s start performance characteristics set the limits of what can be achieved with either a full voltage or reduced voltage starter. 電機起動性能規(guī)定使用全電壓起動器或降壓起動器能達(dá)到的極限值。Motor Start Theory 1 Motor Start Theory 電機起動原理 T202211001MST Motor Start Theory 2 Low Slip v Full Slip 低滑移與滿滑移 0 50 100 150 200 250 300 100 90 80 70 60 50 40 30 20 10 0 SLIP (%) FULL LOAD TORQUE (%) 0 100 200 300 400 500 600 700 CURRENT (%) When applying AC speed drives the motor‘s low slip performance characteristics are important. 當(dāng)使用 AC速度驅(qū)動電機低滑移時，性能特征是十分重要的。 In contrast, when applying soft starters the motor‘s performance at all levels of slip is important. 相反 ， 當(dāng)使用軟起動器時 ， 在滿滑移水平下的電機性能是十分重要的。 It is especially important to consider motor start characteristics when seeking to: Minimise start current Maximise start torque 當(dāng)嘗試以下方式時考慮電機起動特性尤其重要： 將起動電流降至最小 將起動扭矩增至最大 Motor Performance 電機性能 Motor Start Theory 4 Rotor design affects starting performance. 轉(zhuǎn)子的設(shè)計影響起動性能。 The shape, position and material of the rotor bars affect the current drawn and torque produced during motor starting. 轉(zhuǎn)子桿的形狀、位置和材料影響引入電流和電機起動時產(chǎn)生的扭矩。 The table details selected performance data for a range of 110kW motors. 數(shù)據(jù)表詳述了 110kW電機系列選用的性能數(shù)據(jù)。 LRC levels vary considerably between motors. LRC等級在電機間有顯著變化。 Start Current 起動電流 Motor