IMD 100 Integration manual 4189360015 Rev. G
Functions description
Page 65 of 243
6.4.2 Brake disengagement (Brake output ON)
Before starting the brake engagement sequence, the motor output of the IMD is OFF, which means
that either the Run input is low, or the Enable dev. is inactive, or both. The brake output is OFF (brake
engaged).
When RUN input is set to high and the Enable dev. is active, the IMD starts the modulation to fix the
blade motor position. After a fixed 15 ms delay, the brake output is turned ON. When the brake output
ON delay has passed, the IMD will ramp up the speed in order to pitch the blade to the desired
position. The following figure illustrates the described sequence (the order of the of the
signals/function is different compared with
Modulation
(position)
Speed
Brake
output
Braking
efficiency
Run and
Enable.dev
Acceleration
(ramp defined
by N acc.time)
On
Off
On
Off
On
Off
100%
0%
Max
0
Fixed
15 ms
Time
Brake output ON delay
Figure 35
Brake disengagement sequence