 Tuning tricks, poles etc.
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Uspring
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Mon Sept 16 2013, 10:55AM
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Registered Member #3988
Joined: Thu Jul 07 2011, 03:25PM
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Posts: 711
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Eric wrote:
Udo, the basic idea is that you use the current flowing in the tank to charge or discharge the capacitors across the switches, when a cap is fully charged or discharged, you have basically forced the voltage across that cap (and the switch) to ether 0V or the +rail voltage (depending on if you are turning on or off). This way the switch turns on or off with no potential across it when it goes to switch, hence zero volts. Thank you for the explanation. If you keep phase shift between primary and secondary current to 90 degrees as suggested above, the coil will run nearly at the seccondary res frequency. If the primary is tuned low, so that the secondary res f is always above the primary res f, the primary tank will look inductive, so that ZVS could be employed.
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