Table of Contents

- What is 3phase dual converter?
- How many thyristors are required for dual converter?
- What causes a circulating current in dual converters?
- What does a dual converter do?
- How many thyristors are required for full converter?
- What is the name of a converter which can work on both in 3 pulse and 6 pulse modes?
- What are the four quadrants of dual converter?
- How many SCR is a 3 phase full converter?

## What is 3phase dual converter?

Three Phase Dual Converter The three-phase rectifier will do the conversion of the three-phase AC supply to the DC. This DC is filtered and given to the input of the second converter. It will do the DC to AC conversion and the output that we get is the three-phase AC. Applications where the output is up to 2 megawatts.

## How many thyristors are required for dual converter?

This single phase converter is achieved by using a pair of a thyristor controlled bridge (4 SCRs X 2) that enables the DC motor to get reversed polarity for either direction rotation and speed control also lowered in steps by Microcontroller triggering each bridge SCR bank of duly interfaced through Opto-isolators.

**What is ideal condition of dual converter?**

Principle of the Dual Converter (Ideal Dual Converter) To understand the principle of the dual converter, we assume that both converters are ideal. It means that they produce pure DC output voltage, there is no ripple at the output terminals.

### What causes a circulating current in dual converters?

What causes circulating current in dual converters? Explanation: In case of practical dual converters, the voltages from both the converter circuits though equal in magnitude is out of phase. This indifference in voltages causes circulating currents to flow.

### What does a dual converter do?

Dual Converter is an Electronic Device or Circuit made by the combination of two bridges. One of them works as Rectifier(Converts A.C. to D.C.) and other bridge works as Inverter(converts D.C. into A.C.). Thus an electronic circuit or device in which two processes take place at same time, is known as Dual Converter.

**What is advantage of dual converter?**

Explanation: Dual converters provide four quadrent operation, which means voltage can be positive or negative and so can be the current. Hence, AC-DC, DC-AC any converter configuration can be used.

#### How many thyristors are required for full converter?

four thyristors

The fully controlled converter uses four thyristors . It is a two quadrant converter was voltage polarity can reverse, but current direction cannot reverse because of unidirectional nature of thyristors.

#### What is the name of a converter which can work on both in 3 pulse and 6 pulse modes?

Semi-converters

9. Which of the below mentioned converter can operate in both 3-pulse and 6-pulse modes? Explanation: Semi-converters can operate in 6-pulse modes gating the SCRs at appropriate intervals.

**What is the advantage of dual converter?**

## What are the four quadrants of dual converter?

Four Quadrant Operation of Dual Converter

Parameter | Converter I | Converter II |
---|---|---|

2.Average Output Voltage | Positive | Negative |

3. Average Output Current | Positive | Negative |

4.Flow of power | Source to load (Forward Motoring) | Source to load (Reverse Motoring) |

5.Quadrant of Operation | I | III |

## How many SCR is a 3 phase full converter?

A three phase full converter will require __________ number of SCRs. Explanation: Three legs having two SCRs each, six in total. Explanation: When α is less than 90°, the SCRs conduct for 120° and the current and voltage are positive on an average hence, the power flows from AC source to DC load. 3.

**How many SCRs are used in a 3 phase full bridge?**

six thyristors

three phase full converter is a fully controlled bridge controlled rectifier using six thyristors connected in the form of a full wave bridge configuration. All the six thyristors are controlled switches which are turned on at a appropriate times by applying suitable gate trigger signals.