SRCR GENERATOR Caterpillar

Glossary

Usage:

alternately:: in one direction then the other.
anode:: The positive end of a diode or rectifier.
blocking rectifier:: Permits current flow in only one direction. This keeps the polarity of the exciter in the correct direction.
bolted:: Use of a bolt to hold two or more parts together.
breaker:: An automatic switch used to open a circuit.
bridge:: A circuit used to change AC to DC and to measure small quantities of current, voltage or resistance.
build-up:: (Voltage) A gradual increase.
cathode:: The negative end of a diode or rectifier.
capacitance:: The measure of a capacitors ability to take and hold a charge.
circulating current:: The flow of current between two generators working in parallel.
commutator:: A part of the shaft used to remove DC voltage for excitation.
considerably:: By a large amount.
consideration:: Factor.
continuity:: A circuit that is not open.
control:: One that controls.
controlled rectifier:: A rectifier that lets current flow only after it has "turned on."
DC controlled reactor:: Gives resistance to current flow to the rectifier according to the voltage droop setting. Same as saturable reactor, DC.
damping:: To smooth out.
de-energize:: To stop current from going to a component.
distribution winding:: An arrangement of windings, in groups that are in several slots, that go from one end of the core to the other end.
droop:: Decrease.
effective:: Gives the desired effect.
elementary:: Simple.
excitation:: DC current (controlled) used to make a magnetic field.
energize:: To cause current to go to a component.
electrostatic charges:: Electricity caused by friction.
exciter:: Gives DC current to the field windings of the generator.
field:: Magnetic lines of force around a conductor caused by current flow.
field windings:: Many turns of wire wrapped around an iron core. When a DC current flows through the field windings it causes a magnetic field (like that of a bar magnet).
flashing:: A process of putting DC current, from an outside source, into the field windings to get residual magnetism.
fluctuate:: Change.
flux:: Magnetic lines of force.
full wave rectifer:: Changes AC to DC current.
gain:: A change in quanitity of voltage.
gate:: An electronic part of a controlled rectifier (thyristor).
generate:: To make electricity.
grounded:: To make a connection to ground or to a component with similar effect.
impedance:: A combination of resistances.
inadvertently:: Without care.
individually:: One at a time.
induce (to):: To send DC current to a coil and make a magnetic field.
induced:: Caused.
instability:: Without stability.
instrumentation:: group of instruments.
insulated:: A component with insulation.
intermittently:: At intervals.
leads:: Wires.
line voltage:: The output voltage of the generator.
lock in:: When a contact closes to keep a solenoid energized.
lock out:: When a contact opens to keep a solenoid de-energized.
magnetic:: Having the characteristics of a magnet.
magnification:: Make larger.
methodically:: Carefully.
module:: An assembly of electronic components and circuits.
moisture:: The water content in the air.
momentarily:: For a moment.
numerically:: In order by number.
operational:: Ready for operation.
phase winding:: Group of generator stator coils in which electric power for the load is induced.
polarity:: The positive or negative characteristics of two poles.
possibility:: Chance.
probability:: Chance.
proportionately:: With a direct ratio.
pulsating:: Characteristic of rectified current similar to mechanical vibration.
radio suppresion:: Reduce the cause of radio frequency interference.
regenerative power:: Power that works against the primary power.
relatively:: By comparison.
reset:: To put a switch in a ready condition.
reciprocating:: movement in a straight line first one direction then the other.
residual magnetism:: The characteristic of a magnet after removal of excitation.
saturable reactor:: Acts as a valve, as load changes, valve opens or closes to give more or less current to the rectifier.
saturated:: Magnetized to the point where an increase in current will give no increase in magnetic force.
satisfactorily:: Correctly.
SCR:: Silicone Controlled Rectifier (semiconductor)
selinium (Se):: A metallic (like metal) element the with electrical characteristic of being a semiconductor.
semiconductor:: Components like, transistors, diodes, thyristors, etc. Has electrical characteristics between a conductor and insulation.
short:: Any connection between two or more components that is not desired.
shutdown:: When the engine is stopped either automatically or manually.
simultaneous:: At the same time.
solid-state:: An electronic component with no moving parts.
surge:: A sudden increase in voltage or current.
tap:: Connection to get power from a circuit.
tested:: When a test has been made.
transient peak voltage:: A high voltage condition for a short time period.
turn-on:: To start, as current flow through the controlled rectifier; to activate.
unsatisfactory:: Not correct.
verification:: A check to make certain.
voltage droop resistor:: Variable resistor for control of voltage change from full load to no load.
voltage level resistor:: Gives wider range of voltage control.
voltage level rheostat:: Control for adjusting voltage output level.
windings:: Layers of wire on a core.
wiring:: The wires of a circuit.
wound:: Circled.