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Minimization of the power losses in televisions. Report no. 1

Abstract

In order to achieve a simple and a manageable circuit to analyse, the verical deflection circuit is disregarded and the horizontal deflection/EHT circuit is simplified. In the simplified circuit the EHT generator and the deflection circuit are fully coupled and the east/west modulation and the linearity coil are among other facilities ignored. It is argued for that the simplification does not influence the basic mode of operation of the deflection/EHT circuit and the mode of operation is discussed by means of idealised considerations. A laboratory model of the simplified deflection/EHT circuit has been built and connected in parallel to a 100 HZ television set. By doing this no control circuits are needed in the simplified circuit. Measurements on the simplified defelection/EHT circuit are carried out at three different loads of the DST. The measurements are focused on the voltage and the current waveforms on a circuit level and the influence of the parasitic components is discussed. Besides, a comparison of the waveforms at three different loads is performed and comments and conclusions are presented. A general introduction to the facilities in Saber highlights the primary difference between Spice and Saber with focus on the basic architecture of Saber. The procedure  More>>
Authors:
Publication Date:
Mar 01, 1996
Product Type:
Technical Report
Report Number:
NEI-DK-3471
Reference Number:
SCA: 426000; 320106; PA: DK-99:001574; EDB-99:080915; SN: 99002120510
Resource Relation:
Other Information: PBD: Mar 1996
Subject:
42 ENGINEERING; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; POWER LOSSES; TELEVISION; ELECTRIC POTENTIAL; ELECTRONIC CIRCUITS; MEASURING METHODS; HIGH-VOLTAGE PULSE GENERATORS; TRANSISTORS; COMPUTERIZED SIMULATION; 426000; 320106; COMPONENTS, ELECTRON DEVICES AND CIRCUITS; BUILDING EQUIPMENT
OSTI ID:
10147874
Research Organizations:
Aalborg Univ. (Denmark). Inst. for Energiteknik; Bang og Olufsen A/S, Struer (Denmark)
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Other: ON: DE99758217; CNN: Contract ENS-1253/95-0004; TRN: DK9901574
Availability:
OSTI; NTIS
Submitting Site:
DK
Size:
[90] p.
Announcement Date:
Sep 13, 1999

Citation Formats

Oestergaard, Leo. Minimization of the power losses in televisions. Report no. 1. Denmark: N. p., 1996. Web.
Oestergaard, Leo. Minimization of the power losses in televisions. Report no. 1. Denmark.
Oestergaard, Leo. 1996. "Minimization of the power losses in televisions. Report no. 1." Denmark.
@misc{etde_10147874,
title = {Minimization of the power losses in televisions. Report no. 1}
author = {Oestergaard, Leo}
abstractNote = {In order to achieve a simple and a manageable circuit to analyse, the verical deflection circuit is disregarded and the horizontal deflection/EHT circuit is simplified. In the simplified circuit the EHT generator and the deflection circuit are fully coupled and the east/west modulation and the linearity coil are among other facilities ignored. It is argued for that the simplification does not influence the basic mode of operation of the deflection/EHT circuit and the mode of operation is discussed by means of idealised considerations. A laboratory model of the simplified deflection/EHT circuit has been built and connected in parallel to a 100 HZ television set. By doing this no control circuits are needed in the simplified circuit. Measurements on the simplified defelection/EHT circuit are carried out at three different loads of the DST. The measurements are focused on the voltage and the current waveforms on a circuit level and the influence of the parasitic components is discussed. Besides, a comparison of the waveforms at three different loads is performed and comments and conclusions are presented. A general introduction to the facilities in Saber highlights the primary difference between Spice and Saber with focus on the basic architecture of Saber. The procedure of simulating the simplified deflection/EHT circuit is explained and the demarcations are presented. The simulation is performed with both idealised models of the components and with existing models of the components in Saber. The models of both types of components are shortly presented. The simulated waveforms are in close agreement with the measured waveforms apart from the ringing primary caused by the parasitic components in the DST which are not included in the simulation model. The measuring system, the general measuring process and the data processing used when mapping the power losses in the simplified deflection/EHT circuit are explained. The measurements are performed at the working temperature of the components and at different loads of the DST. The power losses in the individual components are determined by the current through and the voltage across the components. The only exception from this procedure is the measurement of the power losses in the deflection coil, the DST, and the capacitors. The power losses in these components are found by indirect methods. In the normal working area of an average picture in a televison, the overall efficiency is approximately 30 percent and the major part of the power loss is concentrated in the deflection coil. Moreover, the transistor, the diodes, and the DST contribute significantly to the overall power loss. (au) EFP-95. 13 refs.}
place = {Denmark}
year = {1996}
month = {Mar}
}