K
Klaus Kragelund
Hi
I'm working on a resonance converter and have read a little bit on the
subject thus far. Most recommend using a series resonance topology, but
I cannot seem to find the excact reason why the parallel resonance
converter is disregarded.
The block diagram is a follows:
www.microdesign.dk\tmp\parallel_resonance_conv.jpg
In this parallel resonance converter the OSC is adjusted to exactly the
resonance frequency. Offcourse this will let the voltage envelope
continue to rise on the LC circuit, but that is taken care of by the
optocoupler which will shut down the driver when the voltage is to high
on the output
So in essence the converter is operating burst like on the resonance
point
In this converter the current is cycled between the L and C in the LC
circuit, so there is little current in the driver. On the contrary the
series converter has large current in the drive.
But what is the drawbacks to an parallel LC circuit like this versus a
standard series LC resonance converter? Something that I'm missing?
Thanks
Klaus
I'm working on a resonance converter and have read a little bit on the
subject thus far. Most recommend using a series resonance topology, but
I cannot seem to find the excact reason why the parallel resonance
converter is disregarded.
The block diagram is a follows:
www.microdesign.dk\tmp\parallel_resonance_conv.jpg
In this parallel resonance converter the OSC is adjusted to exactly the
resonance frequency. Offcourse this will let the voltage envelope
continue to rise on the LC circuit, but that is taken care of by the
optocoupler which will shut down the driver when the voltage is to high
on the output
So in essence the converter is operating burst like on the resonance
point
In this converter the current is cycled between the L and C in the LC
circuit, so there is little current in the driver. On the contrary the
series converter has large current in the drive.
But what is the drawbacks to an parallel LC circuit like this versus a
standard series LC resonance converter? Something that I'm missing?
Thanks
Klaus