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All information contained herein is the exclusive copyright of Round Bank Engineering Ltd and is not to by copied,
duplicated or otherwise distributed without the express permission of Round Bank Engineering Ltd, Unit 7, Victoria
Business Park, Halifax, UK, HX1 5ND - +44 (0) 1422 647177
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Duty Acc/Dec
This parameter is used by the controller when the PID is not enabled. This value sets the time in milli
seconds between each % increase in the duty cycle.
Example, a value of 10 (10 milliseconds or 0.01 seconds) is Set for this parameter.
Start PWM = 150 = 15%
Fixed Speed Duty = 57.5%
Difference in duty = 57.5
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15 = 42.5%
10ms delay for every %
42.5 * 0.01 = 0.425 seconds acceleration time.
NOTE
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This is a four-quadrant controller with no braking resistor mounted. This means that
motors with high inertia loads can regenerate energy as a voltage onto the Supply. Care must be
taken when decelerating quickly to ensure the voltage increase does not damage the PSU or
exceed the max voltage specification for the controller.
Fixed Speed (PID Hz)
This parameter will set the target motor speed in Hz when the PID is Enabled.
Example
Required speed of a 4 pole motor (2 Pole pairs) is 1450RPM.
Motor Speed = (1450 * 2) / 60 = 48.3Hz
The controller will round this value down to 48Hz, so the actual target speed will be:
RPM = (48 * 60)/2 = 1440RPM.
PID Acc/Dec
This parameter is used by the controller when the PID is enabled. This value sets the time in milli
seconds between each 1Hz increase in the motor speed.
Example, a value of 5 (5 milliseconds or 0.005 seconds) is Set for this parameter.
Min Frequency (Hz) = 50Hz
Fixed (PID Hz)= 100Hz
Difference in duty = 100
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50 = 50Hz
5ms delay for every 1Hz
