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Complete System:
Regulated Output Field Exciter With
KinetSync-NB Digital Annunciation
Module
The Kinetics model type ENB is
a combination system of the KinetSync-NB
digital logic controller and annunciation
module and the Kinetics KNB1 brushless
motor exciter regulator. The ENB
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.
As a standard system feature,
the package includes power factor
regulation control for the motor
field to be maintained to a preset
motor power factor with varying
loads and temperatures.
Kinetics is the only manufacturer
in the United States to design and
manufacture the critical segments
required for an off shaft brushless
type motor excitation system as
a single source manufacturer.
One source responsibility for an
excitation system is our goal. Kinetics
products are designed specifically
for synchronous motors. Our units
are not an adaptation or function
compromise using components designed
for another type of machine, such
as a generator or motor drive. Synchronous
motors and the processes they drive,
have specific needs that Kinetics
has incorporated into the product
we manufacture.
The Kinetics KinetSync-NB
digital logic control and annunciation
module provides starting
and operating control, protection
and fault annunciation for the operation
of brushless synchronous motors.
System software packages are available
to match with the different types
of on shaft exciters. The different
types of on shaft synchronizing
methods must be matched to the off
shaft application logic and exciter.
The KinetSync-NB provides:
• Protection & control
needed for the specific application
of brushless synchronous motors.
• Digital logic control
with analog interfacing.
• Designed for ease of application
and startup.
• Includes a ready-to-use
RS232 communication port.
• Motor power factor monitoring
for interfacing with a voltage
/ power factor regulated field
exciter.
KinetSync-NB key features:
• Continuous digital display
of motor power factor, exciter
DC amps and exciter DC volts.
• Text display of motor
operating status.
• Text display of system
fault annunciation.
• Back lit alpha numeric
LCD display screen.
• Touch pad interface for
operating parameter adjustment.
• Programmable key pad security
code for operating protection
feature.
• Motor fault / trip history
registry with time and date stamp.
• Unit pre-programmed for
immediate installation and operation.
• Fused PT disconnect terminal.
• Quick disconnect connections.
• Through the door mounting
case.
• Input power operation
120/1/60 or 50 Hz.
• UL & CUL Listed.
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.
• 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.
Interconnection cables:
From our years of working with industrial,
utility and OEM customers, a common
concern of installers and maintenance
people alike, is to install component
sections as quickly as possible
and minimize the possibility for
interconnection wiring errors. Kinetics
is the only manufacturer to offer
factory manufactured, electro-statically
shielded, interconnection cables
with heavy industrial Molex plugs
for use with our KinetSync-NB unit
to the KNB regulated exciter.
Alternate method power
factor control circuit.
For applications where power factor
regulation control is desired but
digital annunciation, history log
and control is not required, Kinetics
offers the PFTRP control circuit.
The PFTRP circuit provides PF regulation
at a reduced cost to using a KinetSyn-NB
module. A circuit description is
available with the "Library"
section of this web site.
Optional features available:
• Field forcing.
• Heavy industrial enclosures.
• Non-standard input or output
voltage and current ratings.
• Input / output communications
and control per customer request.
Information needed for
a quote:
• 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.
Click
here to download the KinetSync-NB
Manual
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