Now that computer and electronic control systems are widely established, many essential services (such as hospitals, traffic control, airports etc) and industrial / production facilities (including power stations) can be seriously disturbed by breaks in or contamination of their power supplies. This book is a comprehensive guide to the various types of uninterruptible power supply (UPS) available, and how a UPS can be specified and applied for safe and reliable functioning in the working environment.As.li), 811(1 thflT JS flflm fl (IJOdf within the circuit to assist in the rapid turn oil of the device. The basic inverter ... losses and low electrical inertia. By producing a low-power very-accurate sine wave, we are able to compare the inverter output sine wave with this reference. ... Figure 6.14 Circuit diagram of power transistor Figure 6.15 Principle of pulse width modulation UPS systems usually. Static transistoranbsp;...
Title | : | Uninterruptible Power Supplies |
Author | : | John Platts, John St. Aubyn |
Publisher | : | IET - 1992-01-01 |
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