| The Kinetics
model type ENB-SPM is a combination
system of the Kinetics KNB1 brushless
motor exciter regulator and SPM
module. The ENB-SPM system provides
sequencing of the control for interfacing
with the internal motor controls
to provide protection from incomplete
sequence faults, motor running faults
and annunciation of motor operational
status. Kinetics can supply SPM
modules as an OEM supplier with
Kinetics KNB exciter regulator.
The SPM, as it is manufactured
by another manufacturer, must be
field programmed. The SPM manual
should be consulted prior to application
for product operational constraints.
The SPM manufacturer recommends
against using the unit in a power
factor mode for some applications
including but not limited to reciprocating
compressors.
The Kinetics model type KNB1-SPM
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-SPM
includes the required interface
circuit to incorporate the use of
a regulation signal from a SPM module.
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,
tachometer generator signal or a
regulation signal from the SPM.
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
manufactures of brushless synchronous
motors, have different configurations
of rotation 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 input and DC outputs
are available upon request.
The Kinetics KNB1 includes:
- 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
Optional features available:
- Field forcing.
- Heavy industrial enclosures.
- Non-standard input or output
voltage and current ratings.
Information needed for a quote:
- SPM model type to be used in
the project.
- AC input available; volts/phase(s)/hertz.
- DC output required: volts /
amps.
- Motor manufacturer.
- Circuit diagram or instruction
manual to the on shaft exciter
electronics.
- Mode of regulation desire; volts
or current or power factor or
other.
- Open panel or in an enclosure.
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