Power Supply Sections
A unit that supplies ELECTRICAL power to another unit
Power Supply
What is the characteristic of a step-up transformer?
Designed to increase the output voltage
What power supply section uses two diodes to convert a full AC voltage to pulsating direct current?
Conventional Full-wave rectifier
Which type of power supply filter is best for loads that require a constant current output?
Inductor capacitor (LC) Capacitor-input filter
(Pi) filter
What is the percent of regulation of a power supply that produces 56 Volts when the load current is zero if the output drops to 50 volts when full load current flows?
(Enl - Efl)/Efl x 100 = (56-50)/50 x 100 =12%
This section of the power supply isolates the power supply from the input line voltage AND can step-up or step-down the voltage.
Transformer
What is a characteristic of a step-down transformer?
Designed to decrease the output voltage
Which type of power supply rectifier uses one diode to convert half of the AC voltage to pulsating direct current?
Half-wave rectifier
Which filter is the most basic filter used in power supplies?
Capacitor filter
Which power supply senses current change in the parallel resistance of the circuit and compensates for that change?
Shunt-regulator
Which power supply section converts a pulsating DC to a more desirable form of DC voltage?
Filter
What is a characteristic of a center-tapped transformer?
Designed to provide two equal AC voltage waveforms to a conventional full wave rectifier circuit. The two waveforms are 180˚ out of phase.
Which power supply section converts the AC input signal to a pulsating DC voltage?
Rectifier
Which characteristic of filters best describes the components of a filter and their purpose?
A network of resistors, capacitors and inductors that control the rise and fall time of a varying signal
Which power supply regulator is used in low-current circuits only?
Zener diode
The power supply section that maintains the output of the power supply at a constant level?
Voltage regulator
The maximum distance above a reference line of an AC sine wave is called this
Emax or Epeak
Which power supply rectifier uses four diodes to convert a full AC voltage to pulsating DC?
Bridge Rectifier
The small amount of AC voltage occurring on a DC voltage as an unavoidable result of rectification is called this. It is also the output of a filter circuit.
Ripple voltage
This type of regulator is able to handle a high amount of current without excessive heat buildup.
Switching regulator
When comparing the volts RMS value from an AC line voltage waveform, The RMS value will always be ______ than the volts peak value
Lower (smaller)
ERMS = Emax(peak) x 0.707
The value of an AC sine wave that measures from the Maximum positive value of a sine wave alternation to the Maximum negative value of an alternation is called this.
E peak to peak
Which power supply section uses both halves of the waveform input voltage cycle?
Bridge Rectifier and Conventional Full-wave Rectifier
Which power supply section converts a pulsating DC input to a more desirable form of DC voltage?
A filter
A type of series regulator that is effective at reducing ripple voltage but requires extra hardware to dissipate heat generated during its operation?
3 terminal regulator