What is the effect of source inductance on the performance of converter?
The presence of source inductance does have significant effect on the performance of the converter. With source inductance present the output voltage of a converter does not remain constant for a given firing angle. Instead it drops gradually with load current.
What is source inductance?
The presence of source inductance means that commutation of load current from one thyristor to the next, as they are triggered with a firing angle α, can not be instantaneous. This source inductance, Ls, is invariably because of the inductance of the supply lines and the leakage inductance of the input transformer.
What is circulating current in dual converter?
There is an instantaneous voltage difference at the DC terminals of the two converters. It produces enormous circulating current between the converters and that will flow through the load. Therefore, in the practical dual converter, it is necessary to control the circulating current.
What is overlap angle in rectifier?
Commutation overlap occurs when there is inductance in the supply circuit of a diode (or thyristor) rectifier. It can be seen by adding a supply inductance to the 3-phase supply in the diode rectifier simulation. Integrating allows the angle of commutation overlap (γ) to be found.
What is the effect of source inductance?
Source inductance has a significant impact on the converter performance because its presence alters the output voltage of the converter. As a result, the output voltage reduces as the load current reduces. In addition, the input current and output voltage waveforms change significantly.
What is the role of source and load inductance in chopper circuits?
Step Up Chopper In the circuit, a large inductor L is connected in series to the supply voltage. Capacitor maintains the continuous output voltage to the load. The diode prevents the flow of current from load to source. When the chopper is ON, supply voltage VS is applied to the load .
What happens if there is no circulating current in dual converter?
In a dual converter without circulating current operating mode, the flow of circulating current is completely inhibited through automatic control of the firing pulses, so that only that converter which carries the load current is in conduction and the other converter is temporarily blocked.
What are the effects of source inductance on the output voltage of a rectifier?
What is 6 pulse rectifier?
It is used in both the inverter and the rectifier and for the first time we are introduced to firing angle alpha (ά). The 6-pulse bridge has a pulse number of 6 and can be thought of as a 6 phase, half wave circuit.
What are the effects of source and load inductance?
What is the principle of chopper operation?
Principle of Operation For all type of chopper circuit, the output voltage value is controlled by periodic closing and opening of the switches used in the circuit. The chopper can be viewed as an ON/OFF switch that can rapidly connect or disconnect the source to load connection.