Batteries
What are the two types of batteries differentiated by?
Primary and Secondary batteries are differentiated by their ability to be recharged.
What are the three physical parts of an alternator?
Rotor, stator, and brushes.
What is the basic component of a rectifier?
The diode
On its own, how long can a UPS provide backup power?
5-15 minutes
Filters are associated with what component?
A capacitor.
Batteries supply what kind of voltage?
DC
What three things are required in basic alternator theory? (not components)
Relative Motion
Magnetic Field
Conductor
What converts DC power to AC power?
An inverter
A UPS consists of a battery, inverter, and a...
Charger
What is the primary safety function of an ATS?
How many volts does a carbon-zinc cell produce?
1.5V
What is the purpose of the springs in an alternator?
Springs push the brushes firmly against the slip rings to maintain good electrical contact.
Rectifiers convert AC into what kind of DC voltage?
Pulsating DC
In the event of a power outage, an inverter converts power from what source into AC for use by the equipment?
The batteries in the UPS.
What are the three types of filters (named by their associated components)?
Capacitor
Resistance Capacitor (RC)
Inductor Capacitor (LC)
What is the optimal way to extend the life of a primary battery?
Maintain the temperature at 40o Fahrenheit. (Cold)
Why are rotating field alternators preferable in high load conditions?
They prevent arcing.
2 part question -
Compared to the AC input voltage, does a rectifier and filter create DC voltage that is higher or lower than the AC peak value?
What is the name of this term?
Lower
Effective Voltage, RMS
What second order effects does a UPS prevent?
Loss of unsaved data or serious operational disruption
What are the two advantages of an inductor filter over the resistance filter?
Doesn't reduce DC output voltage
Creates less ripple in the circuit
What consideration must be made for lead acid batteries in regards to temperature?
They should not be left discharged when it is cold or they can freeze.
What three factors determine the output voltage of an alternator?
Rotational speed of the prime mover
Number of armature coils
Strength of the magnetic field
Name at least three applications for rectifiers from the study guide
appliances, transformers, soldering, AM radio, pulse generating circuits, and signal demodulation
Filters are often paired with an inverter to remove unwanted frequencies known as...
ripple
What is the term for a voltage regulator that will correct for voltage changes that may occur due to changes in current in the load device(s)?
Parallel voltage regulator
Or
Shunt voltage regulator