EE 340 Spring 2011 - UNLV

Power Semiconductor Switching Devices

Classification of power semiconductor switches ... • The MCT is a power switch with a MOS gate for turn- on and turn-off. It

  Switch, Power, Semiconductors, Power semiconductor

Power Semiconductor Switching Devices - …

Ideal controllable Power Semiconductor Switch • When turned on, current can flow only in the direction of the arrow

  Switch, Semiconductors, Semiconductor switch

Induction Machines - Howard R. Hughes College of …

3-Phase induction machine construction • 3 stator windings (uniformly distributed as in a synchronous generator) • Two types of rotor: – Squirrel cage

  Induction

EE 340 – Transmission Lines

Electrical Characteristics • Transmission lines are characterized by a series resistance, inductance, and shunt capacitance per unit length. • These values determine the power-carrying capacity of the

  Line, Transmissions, Ee 340 transmission lines

Mechanics of Materials - University of Nevada, Las Vegas

ME 302 Materials Mechanics Introduction and Overview This is a fundamental course in all Civil and Mechanical Engineering Programs. Sometimes it is called:

  Material, Mechanics, Mechanics of materials, Materials mechanics

Resonant Converters - University of Nevada, Las Vegas

9-12 ZCS Resonant-Switch Converter By controlling the switch-off time (t 4 - t 3), i.e., the switching frequency, the average value of v oi, hence the average power supplied to the load

  Converter, Resonant

PowerPoint Presentation

The Laplace Transform Theorem: Initial Value If the function f(t) and its first derivative are Laplace transformable and f(t) Has the Laplace transform F(s), and the exists, then

  Transform, Laplace, The laplace transform

Sunlight and its Properties - Howard R. Hughes College of ...

Types of Radiations • Scattered sunlight (what makes the sky blue) is responsible for the light entering the north-facing windows. It is referred to as diffuse radiation.

  Properties, Sunlight, Sunlight and its properties

Magnetic Circuits - UNLV

Ampère in 1826) relates the integrated magnetic field around a closed loop to the electric current passing through the loop. where H is the magnetic field intensity (measured in At/m) • At a distance r from the wire, ³ H .dl I ³ H .dl H .( 2Sr ) I

  Loops, Magnetic

Obtain the z parameters for the network in Fig. 19.65.

* Find the impedance parameter equivalent of the network in Fig. 19.66. Figure 19.66 For Prob. 19.2. * An asterisk indicates a challenging problem. Chapter 19, Solution 2. Consider the circuit in Fig. (a) to get z11 and z21. 1 Ω I2 = 0 + V1 − 1 Ω I1 (a) Io + V2 − Io' 1 Ω 1 Ω 1 Ω 1 Ω 1 Ω 1 Ω

Table 3.2.1 Typical Transformer Impedances (Tables (a) and ...

ELECTRICAL POWER SYSTEMS ENGINEERING Table 3.2.1 Typical Transformer Impedances (Tables (a) and (b)) reprinted with permission from Electrical Transmission and Distribution Reference Book, ABB Power T&D Co., Raleigh, NC. (a) Standard Reactances and Impedances for Ratings 500 KVA and below (for 60 cycle Transformers).

  Transformers

Mn-Zn Ferrite Cores for Switching Power Supplies PQ ... - TDK

The PQ Core occupies a smaller mounted area, as a transformer, compared to the E-core and EER-Core APPLICATION Tranformers and coils for Switched-mode power supplies (High Mounting Density, Low Profile) PART NUMBER CONSTRUCTION RANGE OF USE AND STORAGE TEMPERATURE Overview of the PQ Series PC47 PQ20/16 Z - 2 2 Material Size of …

  Core, Transformers

Transformer Manufacturing Processes

Transformer Consulting Services Inc. Winding Selection Manufacturing Process: Based on: •winding voltages: (nominal, test, impulse, …) –number of turns –electrical clearances –ZnO discs allowed? •winding current: –needed Copper cross-sectional area –maximum allowed temperature (average and hottest spot)

  Processes, Manufacturing, Transformers, Winding, Transformer manufacturing processes

Lesson 9: Practical Transformer Model and Calculations

Transformer Voltage Drop and Impedance Lesson 9_et332b.pptx 18 Example 9-2: The equivalent resistance and reactance of a 50 kVA, 2400-480 V transformer's windings are R = 2.80 W and X = 6.00 W. (high side). A load of 10 20o is connected to the low voltage side. Determine: a) equivalent impedance of the transformer and load combined

  Transformers

Transformer asics Information Guide - Motion Labs

A transformer that is fed, on the primary winding, by a single alternating voltage, which can be represented by a single sine wave. The secondary winding can be “split” or “tapped”, to produce multiple voltages, such as, 120/240V. If a transformer connection is rearranged from step up to step down or step down to

  Guide, Information, Transformers, Winding, Cisa, Transformer asics information guide

Section 4 – Power Transformer Design

the transformer. R I from surface to internal hot spot is not relevant because very little heat is actually gener-ated at that point. Most of the heat generated in the core (other than in toroids) is near the transformer surface. Heat generated within the winding is distrib-uted from the surface to the internal core. Although

  Design, Power, Transformers, Winding, Power transformer design

'Magnetics Design 5 - Inductor and Flyback Transformer …

nition). However, the current in each winding of any flyback transformer is always highly discontinuous, regardless of inductor current mode. This is because current ( ampere-turns ) transfers back and forth be-tween primary and secondary(s) at the switching fre-quency. As shown in Fig. 5-3, the current in each

  Transformers, Winding, Inductors, Flyback, Inductor and flyback transformer