Power Electronics

Power Electronics

3-phase full-bridge with Regenerative load

3-phase full-bridge with Regenerative load (With source inductance)

The ac to dc power supply with suitable examples and sketches are discuss here advanced. ac to dc power supply is needed to read as engineer student. For loads with negative EMF, we can operate the converter as an inverter by making ๐›ผ > 90ยฐ.  Then real power flows from the load back to the …

3-phase full-bridge with Regenerative load (With source inductance) Read More »

3-phase full-bridge with inductive load

3-phase full-bridge with inductive load (With source inductance)

The ac to dc power converter with suitable examples and sketches are discuss here advanced. ac to dc power converter is needed to read as engineer student. a, b, c are supply side poles A, B, C are converter-input poles Ls is supply internal inductance per phase Io is continuous Input currents  ๐ผ๐‘Ž,๐ผ๐‘,๐ผ๐‘ cannot make …

3-phase full-bridge with inductive load (With source inductance) Read More »

ac to dc inverter

3-phase full-bridge with inductive load

The ac to dc inverter with suitable examples and sketches are discuss here advanced. ac to dc inverter is needed to read as engineer student. Three-phase full-bridge thyristor converter with inductive load Thyristor full-bridge operates quite similar to diode full-bridge but the turn-on points of thyristors are now delayed by angle ฮฑ.  For continuous load …

3-phase full-bridge with inductive load Read More »

Single Phase bridge with inductive load

Single Phase bridge with inductive load (With source inductance)

The single phase converter with suitable examples and sketches are discuss here advanced. single phase converter is needed to read as engineer student. Real AC sources have an internal impedance.  This is basically an  โ€œinternal inductanceโ€, because internal resistance is often negligible. We denote this inductance as Ls per phase. Full-bridge thyristor converter with inductive …

Single Phase bridge with inductive load (With source inductance) Read More »

pwm voltage source inverter

Over modulation with Square wave PWM

Over-modulation means taking m beyond 1. pwm voltage source inverter is discuss here with examples. Over modulation transfers inverter operation from square wave PWM to ordinary square-wave control. Case 1: Single-phase bipolar square-wave PWM Vo waveform with over-modulation of single-phase bipolar PWM Ideal over-modulation makes a smooth transition from square-wave PWM to square-wave VSI but, …

Over modulation with Square wave PWM Read More »

three phase voltage source inverter

Three-phase Square-wave PWM VSI

Three phase voltage source inverter are discussed below with suitable sketches and examples. Also related graphs are also here. Three phase Square wave PWM Voltage source Inverter Modulator for three-phase, square-wave PWM VSI (Reference signals are balanced three-phase, square-wave signals) Amplitude ๐ธ๐‘ and frequency ๐‘“ ๐‘ of carrier signal are fixed. Amplitude ๐ธ๐‘Ÿ and frequency …

Three-phase Square-wave PWM VSI Read More »

Voltage Source Inverter operation

Voltage Source Inverter Square wave PWM

Voltage Source Inverter operation are discussed here with sketches and examples. In first stated before and this PWM is special also because it does not suppress lower-order harmonics in output voltage, which is contrary to the general expectations from a PWM inverter. Single phase Square wave PWM VSI Single-phase Square-wave PWM VSI has two implementation …

Voltage Source Inverter Square wave PWM Read More »

Voltage source Inverter

Voltage source Inverter Square-wave

Square-wave Voltage source Inverter Voltage source Inverter type Square-wave produces a square-wave-AC voltage output. We never attempt to filter this voltage, only those loads compatible with square-wave voltage can use it. E.g.       Lighting loads, Heating loads, AC motors (for high speed running) Single-phase square-wave Voltage source Inverter Circuit of single-phase square-wave VSI ๐‘„1  to …

Voltage source Inverter Square-wave Read More »

AC to DC converter

AC to DC converter Single Phase

AC to DC converter Single Phase are most commonly used in application in every field. more details visit this page. Types of AC to DC converters Uncontrolled converters Fully controlled converters Semi controlled converters Bidirectional converters Uncontrolled converters use diodes, and these provide constant DC voltage output. Fully controlled converters use thyristors, and these provide …

AC to DC converter Single Phase Read More »