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The Kinetics model type KNB1 exciter
regulator is a single phase input,
hybrid bridge, SCR regulated rectifier
specifically designed for the application
of providing regulated DC output
to the field of a rotating exciter
on the common shaft with the motor
rotor. (Specialty units are available
in three phase configurations, KNB3)
The KNB1 exciter has been designed
to regulate the output voltage of
the unit by controlling the DC voltage
applied to the motor field. The
unit maintains the output voltage
regardless of the load conditions,
within the limits of the rectifier.
The unit makes use of an internally
connected voltage feedback loop
signal to provide for regulating
load current proportional to either
a local or remote Reference signal.
Units are also available with the
feedback mode closed on output current,
power factor, tachometer generator
signal or a customer supplied signal.
Units can be configured to accept
an external signal of either 4-20
milliamp or 0-10 volt DC.
The KNB1 exciter has been designed
for maximum flexibility and application
versatility. The space efficient
design has been configured to fix
into the available space of a standard
switchgear, motor starter or motor
control center enclosure.
Cautionary
application note: The various
manufacturers of brushless synchronous
motors, have different configurations
of rotating excitation system circuitry.
When applying an off shaft exciter,
it is imperative that the off shaft
exciter be compatible with the on
shaft exciter field application
circuitry. Kinetics has developed
an extensive engineering archive
of on shaft "circuitry" found on
domestic and offshore manufactured
motors. Kinetics has an on-going
working OEM relationship with the
majority of brushless synchronous
motor manufacturers within the US
market place. Kinetics' engineers
are available to assist in selecting
the correct off shaft exciter configuration.
Standard / stock package:
Input
120 or 240 volts
Output
125 VDC at 10, 15 or 20 ADC nominal.
Other
AC inputs and DC outputs are available
upon request.
All EPT transformers and circuitry,
in Kinetics product, is manufactured
in-house by Kinetics. We have the
manufacturing control to supply
units to international and non-standard
voltages and currents without sacrificing
delivery lead time or costing control.
The basic Kinetics KNB1 brushless
motor exciter:
- AC input discount.
- Isolation EPT transformer with
below nominal taps.
- Single phase rectifier bridge
consisting of two SCR and two
diodes mounted to a conservatively
rated heatsink.
- Free-wheeling diode across the
rectifier output.
- Kinetics SCR firing and referencing
circuit.
- AC & DC surge suppression networks.
- Output voltage adjustment potentiometer.
- Linear ramp to full output "soft"
turn on.
- DC current limit and immense
over current protection.
- Terminal points for a DC ammeter
& voltmeter.
- Operational test switch.
- Open panel construction: 18"W
x 18"High x 10"D
Application interface features
available options:
- KinetSync-NB digital logic
controller & annunciation module.
- Interconnection cables with
Molex plugs.
- Power factor signal generation
circuit.
- Field forcing.
- Interface for operation from
a tachometer generator signal.
- Current regulated feedback loop.
- Stand alone heavy industrial
enclosure.
Information needed for a quotation:
- AC input available; volts/phase(s)/hertz.
- DC output required: volts /
amps.
- Motor manufacturer.
- Mode of regulation desire; volts
or current or power factor or
other.
- Open panel or in an enclosure.
- Does the application require
digital logic control, annunciation
and/or remote communication
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