Pentax IPFC-Serie Betriebsanleitung Seite 27

Voltage boost
XX.X [%]
Rated motor Amp.
XX.X [A]
Rated motor freq
XXX [Hz]
Max motor freq.
XXX [Hz]
Min motor freq.
XXX [Hz]
Ramp up time
XXX.X [sec]
Ramp down time
XXX.X [sec]
Ramp f min mot.
XXX.X [sec]
Freq.
Ramp f min mot.
0
PWM
XX.X [kHz]
Voltage increase during the motor start up.
0% Warning: An excessive value can seriously damage the motor. Contact the
motor manufacturer for further information.
XX Rated motor current as per its nameplate indication increased by 5%.
50 Rated motor frequency as per its nameplate.
Maximum motor frequency. Note: by reducing the maximum motor
50
frequency, maximum current will be reduced as well.
20 Minimum motor frequency.
Ramp-up time to reach the speed required to achieve the set pressure (or
frequency value). Longer times delay the system reaching the preset value
4 but better protect system components.
Excessively long ramp-up times can create difficulties in IPFC setup, and
can also cause false overload alarms.
Ramp-down time to reach zero speed. Longer times keep the system
pressurized, while protecting the system components.
4
Excessively long ramp-down times can create difficulties in IPFC setup.
Excessively short ramp-down times can cause false overload alarms.
1.5 Time to reach the minimum motor frequency and vice versa.
PI Control
Ramp up time
Min. motor. freq.
Carrier frequency (switching frequency).
It is possible to choose PWM in the range of 2.5 ,4, 6, 8, 10 kHz .
Higher values give a more sinusoidal wave with fewer losses for the motor
but higher losses for the inverter (increased inverter heating). If long cables
8
are used (>20 m / >76 ft) (submersible pump) it is recommended to install
an inductive filter between IPFC and the motor (available upon request)
and to set the value of PWM to 2.5 kHz. This reduces the risk of voltage
spikes, which can damage motor and cable insulation.
Ramp down time
Stop delay
Control ramp
Ramp f min mot.
Max motor freq.
Freq.min.control
Sec.
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