The Ideal Voltage-regulated Power Supply
Why use regulated power supplies?
The ideal voltage-regulated power supply would have the following features:
1. Zero output impedance at DC and at all frequencies
2. Zero regulation (constant DC output voltage) for a wide range of AC line voltages and over the entire range of load currents that are required by the powered circuitry.
3. Zero power dissipation.
4. Instantaneous recover from changes in line voltage and load current.
5. Overload protection so that normal operation is automatically restored when the excessive current demand is removed.
Power line disturbances and Sources of Power line Disturbance.
Blackout - Sustained lack of AC line voltage.
Brownout - Sustained period of low AC line voltage.
Fluctuation - A surge, sag or brownout condition.
Line Noise (EMI/RFI) - Electromagnetic Interference and Radio Frequency Interference. Can be caused by a variety of sources, including: static electricity, household appliances, radio stations or other broadcast facilities, military or civilian radar, faulty electrical fixtures and power transformers.
Under-Voltage (Sag) - A low voltage condition of short duration.
Voltage-Spike - Instantaneous over voltage condition superimposed on the AC line. Large scale spikes from a thunderstorm, smaller spikes generally result from appliances.
Over-Voltage Surge - Sustained period of over-voltage.
Line Conditioners - A general term referring to any device designed to decrease AC line related problems.
UPS - Uninterruptible Power Supply uses batteries to provide backup power in the event of a blackout, or provide stable voltage during a brownout or fluctuation if the unit also features voltage regulation.
Voltage Regulator - A device designed to stabilize line voltage. Many different types exist, some are more accurate than others
What are the sources of Under-Voltage (sags)?
The sources of sag can be classified broadly into: starting or energizing electrical equipment, natural causes and
The ideal voltage-regulated power supply would have the following features:
1. Zero output impedance at DC and at all frequencies
2. Zero regulation (constant DC output voltage) for a wide range of AC line voltages and over the entire range of load currents that are required by the powered circuitry.
3. Zero power dissipation.
4. Instantaneous recover from changes in line voltage and load current.
5. Overload protection so that normal operation is automatically restored when the excessive current demand is removed.
Power line disturbances and Sources of Power line Disturbance.
Blackout - Sustained lack of AC line voltage.
Brownout - Sustained period of low AC line voltage.
Fluctuation - A surge, sag or brownout condition.
Line Noise (EMI/RFI) - Electromagnetic Interference and Radio Frequency Interference. Can be caused by a variety of sources, including: static electricity, household appliances, radio stations or other broadcast facilities, military or civilian radar, faulty electrical fixtures and power transformers.
Under-Voltage (Sag) - A low voltage condition of short duration.
Voltage-Spike - Instantaneous over voltage condition superimposed on the AC line. Large scale spikes from a thunderstorm, smaller spikes generally result from appliances.
Over-Voltage Surge - Sustained period of over-voltage.
Line Conditioners - A general term referring to any device designed to decrease AC line related problems.
UPS - Uninterruptible Power Supply uses batteries to provide backup power in the event of a blackout, or provide stable voltage during a brownout or fluctuation if the unit also features voltage regulation.
Voltage Regulator - A device designed to stabilize line voltage. Many different types exist, some are more accurate than others
What are the sources of Under-Voltage (sags)?
The sources of sag can be classified broadly into: starting or energizing electrical equipment, natural causes and