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POWER ELECTRONICS

POWER ELECTRONICS

POWER ELECTRONICS. EE‐312 Engr.Talha Ahmed Khan. Introduction to Power Electronics. Power Electronics = Power + Control + Electronics Control deals with the steady state and dynamic characteristics of closed loop systems.

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Thyristors

Thyristors

2. Thyristors. Switching Semiconductor DevicesOff and maximum resistanceOn and minimum resistanceTypically Switch PowerUsually high current and/or high voltagesAC loads most commonlyDC loads under special conditions. 3. Types of Thyristors. SCR - Silicon Controlled RectifiersUJT - Unijunction

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Thyristors

Thyristors

Thyristors. Why Thyristors?.

By daphne-ayers (119 views)

Les thyristors

Les thyristors

Les thyristors. Le SCR. Dispositif à 4 blocs (PNPN) Si on polarise le NPN en fournissant un courant à la Gate, le NPN conduit. Le courant Ic du NPN = Ib du PNP, cela polarise le PNP, le PNP conduit, son collecteur fournit un courant de base Ic au NPN.

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Thyristors (SCRs)

Thyristors (SCRs)

Lecture Notes. Thyristors (SCRs). OUTLINE • SCR construction and I-V characteristics. • Physical operation of SCRs. • Switching behavior of SCRs • dv/dt and di/dt limitations and methods of improving them. • SCR drive circuit considerations. Thyristor (SCR) Geometry.

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How Thyristors operate?

How Thyristors operate?

How Thyristors operate?. If not gated, R=  in case -V RRM < V AK < +V RRM If V AK > 0 and gated (V GK =2…5 V) it starts conducting (R=0) and stays so even if the gate voltage disappears (latch) Once in conduction it turns automatically off (no command): If reverse biased ( V AK <0)

By keziah (85 views)

Dual Converter using Thyristors

Dual Converter using Thyristors

Dual Converter using Thyristors. Dual Converter using Thyristors. Introduction. A.C. motors have the great advantages of being relatively inexpensive and very reliable.

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Thyristors Introduction & Characteristics

Thyristors Introduction & Characteristics

Thyristors Introduction & Characteristics. Introduction. One of the most important type of power semiconductor device. Compared to transistors, thyristors have lower on-state conduction losses and higher power handling capability.

By kelsie-wilkinson (70 views)