The discussion centers around the possibility of achieving a 90-degree phase shift using transformers, exploring theoretical and practical aspects of transformer operation and configurations. Participants examine various methods and configurations, including the use of reactive components and specific transformer types.
Participants generally agree that a basic transformer does not allow for a 90-degree phase shift, but multiple competing views exist regarding alternative methods to achieve this shift, particularly through the use of reactive components and specific transformer configurations.
The discussion includes various assumptions about transformer behavior and the effectiveness of reactive components, which may depend on specific circuit conditions and configurations. The feasibility of achieving a 90-degree phase shift through the proposed methods remains uncertain and is contingent on matching resonant frequencies.
eng90 said:I am learning about transformers and from everything I've read I can see how its possible to create a 180 degree phase shift by winding the primary and the secondary in opposite directions. What I wanted to know was if it's possible to make a 90 degree phase shift with a transformer.
There is a way to create your required 90 degree phase shift; and that is to first connect a capacitor in parallel with the primary input winding of the transformer. This will create a resonant tank circuit with a specific resonant frequency. Now connect a second capacitor (or capacitors) in parallel to the secondary transformer output winding. This creates a second resonant tank circuit. The second capacitor (or capacitors) has to be sized so that the second resonant frequency matches the first resonant frequency. The closer the frequency match, the closer to 90 degrees the resultant phase shift will be.eng90 said:Thanks, I couldn't see how it was possible to get anything other than a 180 degree phase shift.
I'll definitely look into those Scott-T transformers.