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The energy of a moving system flows back into the drive while decelerating. The DC-Bus
capacitors are able to take a small value. The remainder is converted to heat by a high power
resistor switched across the DC link.
Switching on and off of this brake resistor depends on the DC-Bus voltage.
The load of the resistor is simulated and supervised electronically (EASYRIDER
?
).
Peak power (Pmax) and continuous power (Pd) ratings have to be sufficient to meet the
requirements of the application.
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n1
RPM
T
tb1
t [sec]
Movement
I [A]
Ib
t [sec]
Braking Current
Example Values
n1 = 3000 RPM
tb1 = 0.1 seconds
T = 2.0 seconds
J = 0.0005 kgm²
Total Inertia
Data
RL = 0.3 Ohm
Speed at Brake-Start
Braking Time
Cycle-Time
Cable-Resistance
Braking-Current
Ib = 3.2A
Motor-Resistance
Rph = 3.6 Ohm
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Summary of Contents for 631
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