Hi all,
generally when considering a 3 phase circuit it is consistent of sinusoidal currents and voltages under a balanced load. However once one introduces a 3 phase bridge rectifier this seems to break down and root(3)*Vline*Iline ceases to hold as the 'input power' into the BUS, in particular since one phase is 'not' conducting at any given point.
I have run some simulations and see the relationship, however fail to create an easy input to output power relationship.
For example, lets say I require 3kW of output power on a DC Bus being driven from a 3 phase rectifier. How can I easily determine what rating the rectifier must have? For now lets assume the DC Bus has no ripple, so that will automatically factor in a safety margin.
In reality I suppose I could just always simulate it and calculate the average currents in the rectifier diodes, but it would be nice to have something to reference in conversation.
Cheers!
generally when considering a 3 phase circuit it is consistent of sinusoidal currents and voltages under a balanced load. However once one introduces a 3 phase bridge rectifier this seems to break down and root(3)*Vline*Iline ceases to hold as the 'input power' into the BUS, in particular since one phase is 'not' conducting at any given point.
I have run some simulations and see the relationship, however fail to create an easy input to output power relationship.
For example, lets say I require 3kW of output power on a DC Bus being driven from a 3 phase rectifier. How can I easily determine what rating the rectifier must have? For now lets assume the DC Bus has no ripple, so that will automatically factor in a safety margin.
In reality I suppose I could just always simulate it and calculate the average currents in the rectifier diodes, but it would be nice to have something to reference in conversation.
Cheers!