Wide Range Variable Voltage Transformerless DC Power Supply Using TRIAC

<p class="Abstract">Variable voltage DC power supply that has wide range of power, lightweight and inexpensive is quite difficult to obtain. This research designs and tests a DC power supply without a transformer using switching technology that utilizes TRIAC. The 220 Volt AC power source is converted to DC electricity by the method of cutting off some AC waves signal, using TRIAC, and then rectifying it with diodes and filters. DIAC functions as a trigger TRIAC at the specified time, by turning the variable resistor. The test results show that the output DC power voltage can be adjusted from 5 Volts to 75 Volts by adjusting the DIAC resistance and the load resistance. The results of the series image characteristics are given 2-dimensional and 3-dimensional graphics.<em></em></p>

Download Full-text

Harmonics elimination for DC/DC power supply based on piezoelectric filters

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v12.i1.pp356-363 ◽

2021 ◽

Vol 12 (1) ◽

pp. 356

Author(s):

Hasan Ma Almgotir ◽

Enaam A. Khaliq Ali ◽

Wedian H. Abd al ameer ◽

Mustafa A. Fadel Al-Qaisi

Keyword(s):

Power Supply ◽

Circuit Simulation ◽

Harmonic Distortion ◽

Load Resistance ◽

Simulation Software ◽

Resistive Load ◽

Power Electronic ◽

Dc Power ◽

Wide Range ◽

Dc Power Supply

This research presents a study, modelling and simulation of the piezoelectric material work as filters (piezoelectric filter) used to eliminate the harmonics in power electronic circuits, high order harmonics are generating due to the high switching frequencies and circuit equipment, detailed simulation is achieved for the piezoelectric filter tested in full-bridge DC/DC converter circuit with resistive load works as dc power supply (12 to 48 volt). As a result, the uses of piezoelectric filters have a great impact on harmonics elimination, which leads to reduce the overall total harmonic distortion leads to increase the efficiency, as well as the output voltage from the dc power supply remain constant by varying the load resistance over a wide range. The dc power supply circuit including the piezoelectric filter has been simulated using PSIM (V9.1) power electronic circuit simulation software.

Download Full-text

Netzmanagement für ein industrielles DC-Smart Grid*/Network management for a smart industrial DC-Grid

wt Werkstattstechnik online ◽

10.37544/1436-4980-2017-09-41 ◽

2017 ◽

Vol 107 (09) ◽

pp. 603-609

Author(s):

S. Weckmann ◽

D. Schaab ◽

T. Kuhlmann ◽

A. Sauer

Keyword(s):

Network Management ◽

Power Supply ◽

Energy Supply ◽

Industrial Plant ◽

Intelligent Network ◽

New Approach ◽

Industrial Companies ◽

Dc Power ◽

Ac Power ◽

Dc Power Supply

Im Zuge einer wachsenden Volatilität in der Energieversorgung stehen Industrieunternehmen zunehmend vor der Herausforderung, sich flexibel dem Energieangebot anzupassen. Ein neuer Ansatz für eine industrielle Energieversorgung, die den zukünftigen Anforderungen der industriellen Produktion gerecht wird, ist die Umstellung der klassischen Wechselspannungsversorgung (AC) auf eine Gleichspannungsversorgung (DC). Eine auf diese Weise mit Energie versorgte Produktion bietet zahlreiche Vorteile. Der Einsatz eines intelligenten Netzmanagements ist der „Schlüssel“, um flexibel und robust auf schwankende Netzqualität sowie Energieangebote zu reagieren.   Due to an increasing volatility in the energy supply, industrial companies are faced with the challenge of flexibly adapting their energy consumption to the energy supply. A new approach to an industrial power grid, that meets the future requirements of industrial production, is the conversion of the classic AC power supply to a DC power supply. A DC power supply provides numerous advantages for an industrial plant. Intelligent network management is the key to react flexibly and robustly to fluctuating power quality and energy supply.

Download Full-text