Download Fixed Polarity, Reversible Polarity, Four Quadrant Operation…A

yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Electrical ballast wikipedia, lookup

Power factor wikipedia, lookup

Decibel wikipedia, lookup

Current source wikipedia, lookup

Power over Ethernet wikipedia, lookup

Electrification wikipedia, lookup

Electric power system wikipedia, lookup

Electrical substation wikipedia, lookup

Solar micro-inverter wikipedia, lookup

Three-phase electric power wikipedia, lookup

Pulse-width modulation wikipedia, lookup

Resistive opto-isolator wikipedia, lookup

Islanding wikipedia, lookup

Audio power wikipedia, lookup

Power MOSFET wikipedia, lookup

Power engineering wikipedia, lookup

Surge protector wikipedia, lookup

Schmitt trigger wikipedia, lookup

Variable-frequency drive wikipedia, lookup

History of electric power transmission wikipedia, lookup

Power inverter wikipedia, lookup

Stray voltage wikipedia, lookup

Amtrak's 25 Hz traction power system wikipedia, lookup

Rectifier wikipedia, lookup

Distribution management system wikipedia, lookup

Voltage regulator wikipedia, lookup

Opto-isolator wikipedia, lookup

Alternating current wikipedia, lookup

Buck converter wikipedia, lookup

Voltage optimisation wikipedia, lookup

Power supply wikipedia, lookup

AC adapter wikipedia, lookup

Mains electricity wikipedia, lookup

Switched-mode power supply wikipedia, lookup

Application Note Number: AN-10
Revision: 4-21-13
Fixed polarity, reversible polarity, four quadrant operation…a simple
Most of the products Spellman manufactures and sells are DC high voltage
power supplies. DC power supplies have some fundamental limitations as to their
operational capability. To understand what a typical DC high voltage power
supply can do with respect to output voltage, current and power convention it is
helpful to use a Cartesian coordinate system as shown in the figure below.
Output current and voltage are shown on the respective horizontal and vertical
axis and four operational quadrants are created.
Quadrants One and Three are the characteristic operating parameters of a power
supply where power is being provided to the output. Quadrant One identifies a
positive output polarity power supply whereas quadrant Three identifies a
negative polarity output power supply.
475 Wireless Boulevard • Hauppauge New York 11788, USA • • T:+1 631.630.3000 • F:+1 631.435.1620
Quadrants Two and Four are the characteristic operating parameters of a load
where power is being absorbed from the output. This realm is typically not a
functional capability of Spellman’s standard DC high voltage power supplies.
Many of Spellman’s power supplies do have the ability to reverse their output
polarity; typically either a wiring change or a complete exchange of the high
voltage output section is required. Due to this fact our units cannot smoothly and
seamlessly control through zero and cross back and forth easily between
quadrants One and Three. Even units like our CZE Series that have complete
and distinct positive and negative output sections that use a high voltage relay to
change output polarity still require the output voltage to fully decay to zero before
a polarity change can be implemented.