NSK M-EGA-15A2301, Руководство пользователя

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2.Specifications Regenerative control
2-11
2.7 Regenerative control
■
Calculation of the rotational energy which MEGATORQUE MOTOR has in the process
of deceleration
Calculate the rotational energy based on the following expression.
Rotational energy = 1/2× J ×
ω
2
[J]
= 1/2×
J
×(2
π
N
)
2
[J]
J = J
r
+ J
m
J
r:
: Moment of inertial of rotor [kg
•
m
2
]
J
m
: Moment of inertia of load [kg
•
m
2
]
N
: Rotational speed [s
-1
]
■
Available energy from storage in the internal capacitor
The regenerative energy internal capacitor can handle by charging is different depending upon the designation of
driver.
Designation of driver Energy absorbed in the capacitor[J]
M-EGA-15A2301 17
M-EGA-30A2301
24
■
Calculation of the energy which can be consumed in the external regenerative resistor
Energy consumed in the external regenerative resistor[J] = Rotational energy[J]
–
Energy absorbed in the capacitor[J]
When the result of the above calculation is found 0 or less, there is no need for additional installation of external
regenerative resistor.
When the calculation result is found exceeding 0, determine the required capacity for the regenerative resistor based
on the calculations described below.
■
Calculation of the required capacity for the external regenerative resistor
Capacity required for external regenerative resistor [W]
= Energy consumed in the external regenerative resistor [J]/(Operating cycle [s]×0.25)
0.25: Duty factor of regenerative resistor
When calculation result is found 80 or less: Use the external regenerative resistor (Optional model: M-FAE0004).
When calculation result is found 220 or less: Use the external regenerative resistor (Optional model: M-FAE0005).
When calculation result is found exceeding 220, consult us.