Bosch rexroth MCL, Руководство по планированию проекта

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11.4.4 Power loss
The power loss corresponds to the continuous electrical power loss of the
motor.
P
V
Electrical power loss of motor in W
F
eff
Effective force in N
F
N
Rated force of the motor in N (see chapter 4 ”Technical data”)
P
vN
Rated power loss of the motor in W (see chapter 4 ”Technical
data”)
Fig. 11-26: Required cooling capacity of the linear motor
11.5 Energy regeneration
Compared with rotary servomotors, the energy of a linear motor during decel‐
eration is lower. The translational velocity of a linear motor is usually much
lower than the circumferential speed of a rotary servomotor.
The regenerative power of a synchronous linear drive results from the energy
balance during braking and can be estimated as follows for dimensioning ad‐
ditional braking resistors or regenerative supply units:
P
R
Energy regeneration during a braking phase in W
P
Ravg
Average energy regeneration over total cycle duration in W
m Moved mass in kg
v Maximum velocity in m/s
t
b
Braking time in s
F
R
Friction force in N
R
12
Winding resistance of the motor at 20°C in Ohm (see Chapter
4 “Technical data”)
a
max
Brake retardation (negative acceleration) in m/s²
k
iFN
Motor constant in N/A
t
all
Total cycle duration in s
Fig. 11-27: Energy regeneration of linear motor
Prerequisites: Velocity-independent friction
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Motor dimensioning
MCL Ironless Linear Motors
Bosch Rexroth AG R911330592_Edition 06