What is the load commutated inverter fed synchronous motor called as?
A load commutated, CSI fed self controlled synchronous motor is very well known as a converter motor. It has very good stability characteristics and dynamic behavior similar to a dc motor. Due to machine commutation the working speed range starts typically above 10% of base speed and extends up to base speed.
When can a synchronous motor be load commutated?
When can the synchronous motor be load commutated? When the synchronous motor operates at a leading power factor thyristors of load side converter can be commutated by the motor induced voltages same way as the thyristors of a line commutated converter are commutated by line voltages. 25.
What does LCI stand for in a power plant?
Load Commutated Inverter (LCI) is a system with an input thyristor bridge and an output thyristor bridge. The input bridge is naturally commutated by the AC supply and supplies DC current with harmonics into a large inductor.
What is LCI drive?
An LCI drive is an old and different topology to a VSI AFE drive. The LCI drive has a long history and its advantages and limitations are well understood. It is simple and reliable, but requires careful attention to ac power system issues related to harmonic currents and reactive power.
What is meant by load commutation?
Load commutation of SCR is a forced commutation technique in which SCR is forced to turn off. Turning off an SCR essentially requires its anode current to fall below holding current and a reversed biased voltage must be present across SCR for sufficient time so that SCR may regain its blocking state.
What is load commutated Cycloconverter?
A cycloconverter is a naturally commutated converter in which the output frequency and voltage can be controlled independently and continuously. It consists of back to back connected controlled rectifiers whose output voltage and frequency can be controlled by tuning firing angles of rectifiers.
What is load commutated cycloconverter?
What is VSI drive?
Voltage-source inverter (VSI) drives (see ‘Generic topologies’ sub-section below) are by far the most common type of drives. Most drives are AC-AC drives in that they convert AC line input to AC inverter output.
What is current source inverter?
The current source inverter is also known as current fed inverter which converts the input dc into ac and its output can be three-phase or single phase. According to the definition of the current source, an ideal current source is the kind of source in which current is constant and it is independent of voltage.
When a line commutated converter operates in the inverter mode it?
Therefore, in the inverter mode of operation, it delivers active power to the source and absorbs reactive power. Note: In Dual converter, it consists of two converters. One will perform as a rectifier and the other will perform as an inverter.