Sanyo Denki SANMOTION 3E S, Instruction Manual, Page: 395 / 488

11.3 Selection of regenerative resistor
11-10
1
1
Selection
11.3 Selection of regenerative resistor
Calculate "regeneration effective power (PM)," and determine the capacity of the regeneration
resistance to be used. Judge whether usage of an internal regenerative register machine is
possible by this calculation result.
11.3.1 How to find "regeneration effective power (PM)" of the
horizontal axis drive by a formula
■
Calculate regeneration energy.
EM : EM: Regeneration energy during operations along horizontal axis [J]
Ehb : Regeneration energy during deceleration [J]
Ke
φ
: Voltage constant per phase [Vrms/min -1 ] (Motor constant)
KT : Torque constant [N ・ m/Arms] (Motor constant)
N : Motor rotation speed [min
-1
]
R
φ
: Phase resistance [
Ω
] (Motor constant)
tb : Deceleration time [s]
Tb : Torque during deceleration [N
・
m]
■
Calculate "regeneration effective power" from regeneration energy.
PM : Effective regeneration power [W]
EM : Regeneration energy [J]
to :Cycle time [s]
PM =
EM
to
2
EM = Ehb =
1
2
× N × 3 × Ke
φ
×
Tb
KT
× tb -
Tb
KT
× 3 × R φ × tb