Fuji Electric FRN355VG1S-4J [1041/1046] App e conversion from si units
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Fuji Electric FRN355VG1S-4J [1041/1046] App e conversion from si units

Fuji Electric FRN315SVG1S-4J [1041/1046] App e conversion from si units
App. E Conversion from SI Units
A-23
App.
App. E Conversion from SI Units
All expressions given in Chapter 3, "SELECTING OPTIMAL MOTOR AND INVERTER
CAPACITIES" are based on SI units (The International System of Units). This section explains how
to convert expressions to other units.
[ 1 ] Conversion of units
(1) Force
• 1 (kgf) ≈ 9.8 (N)
• 1 (N) ≈ 0.102 (kgf)
(2) Torque
• 1 (kgf·m) ≈ 9.8 (N·m)
• 1 (N·m) ≈ 0.102 (kgf·m)
(3) Work and energy
• 1 (kgf·m) ≈ 9.8 (N·m) = 9.8(J)
= 9.8 (W·s)
(4) Power
• 1 (kgf·m/s) ≈ 9.8 (N·m/s) = 9.8 (J/s)
= 9.8(W)
• 1 (N·m/s) ≈ 1 (J/s) = 1 (W)
≈ 0.102 (kgf·m/s)
(5) Rotation speed
•
(rad/s)0.1047)s/rad(
60
2
(r/min)1 ≈
π
=
•
(r/min)9.549(r/min)
2
60
)s/rad(1 ≈
π
=
(6) Inertia constant
J (kg·m
2
) : moment of inertia
GD
2
(kg·m
2
) : flywheel effect
• GD
2
= 4 J
•
4
GD
J
2
=
(7) Pressure and stress
• 1 (mmAq) ≈ 9.8 (Pa) ≈ 9.8 (N/m
2
)
• 1(Pa) ≈ 1(N/m
2
) ≈ 0.102 (mmAq)
• 1 (bar) ≈ 100000 (Pa) ≈ 1.02 (kg·cm
2
)
• 1 (kg·cm
2
) ≈ 98000 (Pa) ≈ 980 (mbar)
• 1 atmospheric pressure = 1013 (mbar)
= 760 (mmHg) = 101300 (Pa)
≈ 1.033 (kg/cm
2
)

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