·PÀ³Âà³t rpm ( revolution per minutes )

Âà³t  (rpm) = 60 x Hz x 2 /·¥¼Æ

for examples:

1. 60 Hz 4P °¨¹F

    Âà³t  (rpm) = 60 x 60x2 / 4 = 1,800 rpm

2. 60 Hz 2P °¨¹F

    Âà³t  (rpm) = 60 x 60x2 / 2 = 3,600 rpm

3. 50 Hz 4P °¨¹F

    Âà³t  (rpm) = 50 x 60x2 / 4 = 1,500 rpm

4. 50 Hz 2P °¨¹F

    Âà³t  (rpm) = 50 x 60x2 / 2 = 3,000 rpm

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³æ¬ÛSingle Phase

¤T¬Û Three Phase

AMP=

(HPx746)/(VOLTxEFF)

(HPx746)/(VOLTxEFFxPF)

(HPx746)/(VOLTxEFFxPFx1.73)

(kwx1000)/VOLTS

(kwx1000)/(VOLTSxPF)

(kwx1000)/(VOLTxPFx1.73)

KW= (AMPxVOLT)/1000 (AMPxVOLTxPF)/1000 (AMPxVOLTxPFx1.73)/1000
HP= (AMPxVOLTxEFF)/746 (AMPxVOLTxEFFxPF)/746 (AMPxVOLTxEFFxPFx1.73)/746

PF=¥\²v¦]¼Æ¬ù80%

EFF=®Ä²v¡A¬ù80%  -90%

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§á¤O   Torque

T

T= F x R

(kgfm)

§á¤O   Torque

T

T= (716.2 x Hp) / N

(kgfm)

§á¤O   Torque

T

T= (947 x kW) / N 

(kgfm)

°¨¤O   kw

Hp

Hp=(T x N) / 716.2

(Hp)

°Ê¤O       HP

kW

kW=( T x N ) / 974

(kW)

°¨¤O   kw

Hp

Hp=(F x V) / 75

(Hp)

°Ê¤O       HP

kW

kW=(F x V) / 102

(kW)

³t«×   SPEED

V

V=(£k x D x N ) / 60

( m/ sec)

´î³t¤ñ   RATIO

i

i = N1 / N2

 

­¸½ü®ÄÀ³ Dynamic moment

GD2

GD2   = 364 x ( F x  V2 x N2 )  

kgm2

F: ­«¶q(kg)

D: ª½®|(m)

N: ¥X¤O¶b¨C¤ÀÄÁ°jÂà¼Æ(RPM)

R: ¥b®|(m)

 

³æ¦ì´«ºâ  Conversion Factors

1kW

1HP

1kgf-m

1Nm

1in-lb

1ft-lb

1.34HP

0.746kW

9.807 N-m

0.10197kgf-m

0.1129 N-m

1.356N-m

1.36PS

1.01PS

7.233ftlb

0.7375ftlb

0.0115kgf-m

0.1383kgf-m

102.0kgf-m/s

76.07kgf-m/s

86.796inlb

8.85070inlb

0.083ftlb

12inlb

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F = m*a F¬O¡y¤O¶q¡z¡Am¬O¡y½è¶q¡z¡Aa¬O¡y¥[³t«×¡z 

´N SI ³æ¦ì¼Ð·Ç¡GF¬O¡y¤û¹y(N)¡z¡Am¬O¡y¤½¤ç(kg)¡z¡Aa¬O¡y¤½¤Ø/¬í^2 

(m/s^2)¡z¡A©Ò¥H 1¤û¹y(N)=1kg*1(m/s^2)=1kg*m/s^2 

´N­«¤O³æ¦ì¼Ð·Ç¡GF¬O¡y­«¤O¤½¤ç(kgf)¡z¡Am¬O¡y¤½¤ç(kg)¡z¡Aa=g¬O¡y­«¤O¥[³t«×9.8¤½¤Ø/¬í^2 (9.8m/s^2)¡z¡A©Ò¥H 1­«¤O¤½¤ç(kgf)=9.8kg*m/s^2 

¤]¥i¥H³o¼Ëªí¥Ü 1kgf=9.8¤û¹y(N

1Ν·m = 1 J¡@ µJ¦Õ¡]²ºÙµJ¡^¬O°ê»Ú³æ¦ì¨î¤¤¯à¶q¡B¥\©Î¼ö¶qªº¾É¥X³æ¦ì¡A²Å¸¹¬°J¡C¦b¥j¨å¤O¾ÇùØ¡A

1µJ¦Õµ¥©ó¬I¥[1¤û¹y§@¥Î¤O¸g¹L1¤½¤Ø¶ZÂ÷©Ò»Ýªº¯à¶q¡]©Î°µªº¾÷±ñ¥\¡^¡C¦b¹qºÏ¾ÇùØ¡A1µJ¦Õµ¥©ó±N1¦w°ö¹q¬y³q¹L1¼Ú©i¹qªý1¬í®É¶¡©Ò»Ýªº¯à¶q¡CµJ¦Õ¬O¦]¬ö©Àª«²z¾Ç®a¸â©i´µ·µJ¦Õ¦Ó©R¦W

1µJ¦Õ¤]¥i¥H©w¸q¬°
²¾°Ê1®w¨Ú¹q²ü³q¹L1¥ñ¯S¹qÀ£®t©Ò»Ý§@ªº¥\¡A©Î1®w¨Ú·¥ñ¯S¡C³oÃö«Y¤]¥i¥H°f¤Ï¹L¨Ó©w¸q¥ñ¯S¡C

²£¥Í1¥Ë¯S¥\²v1¬í®É¶¡©Ò»Ý§@ªº¥\¡A©Î1¥Ë¯S·¬í¡C³oÃö«Y¤]¥i¥H°f¤Ï¹L¨Ó©w¸q¥Ë¯S¡C

1 watt hour = 3600µJ¦Õ

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