Sevcon MillipaK 4QPM - Page 30

Configuration Performance/Braking
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MillipaK 4QPM Controller Manual Page 30 13/08/03
Immediate Footbrake Zero Volts
Calibrator Menu Reference:
11.12
Minimum Maximum Step Size Typical Value
0.00V 4.50V 0.02V 0.10V
Immediate Footbrake Full Volts
Calibrator Menu Reference:
11.13
Minimum Maximum Step Size Typical Value
0.00V 4.50V 0.02V 3.50V
As the input voltage varies from the Zero level to the Full level, the footbrake demand varies from
0% to 100%. When the footbrake demand is at 0%, there is no footbraking. As the footbrake
demand increases from 1% to 100%, the braking level applied by the system increases from 50%
of the Footbrake Level personality to 100% of the Footbrake Level personality.
For example, assume the system is configured to have a footbrake pot and the Footbrake Level
personality is set to 60%. If the operator has not depressed the footbrake pedal, then the voltage
into the controller will be outside of the Footbrake Zero Level personality and the footbrake
demand will be 0%. There will be no Footbraking.
If the operator starts to press the footbrake pedal, then the footbrake demand will increase. When
the demand increases above 0% the system will start braking and will set the braking effort
according to the following formula:
ypersonalit level footbrake
100
50
2
demand footbrake
effort braking ×












+






=
So, for this example, at 1% demand the braking effort would be
%30
06
100
50
2
1
effort braking
=
×












+






=
and at 75% demand the braking effort would be
%5.52
06
100
50
2
75
effort braking
=
×












+






=