Voltage oscillating circuit and method

A circuit for generating a large-amplitude oscillating voltage comprising:

• a power supply means for providing an input voltage;
• a non-bridge capacitor-type non-resonant voltage oscillating means for generating said large-amplitude oscillating voltage;
• a power supply switching means including a solid state relay (SSR) connected between said power supply means and said voltage oscillating means for switching on and off said voltage oscillating means from said power supply means;
• said voltage oscillating means further includes a SCR-capacitor-choke oscillating circuit including a first SCR, a second SCR, a capacitor and a choke circuit wherein said capacitor and said choke forming a common circuit connecting to said first and said second SCRs where said first SCR connected to a first end of said voltage regulating means and said second SCR connected to the opposite end of said voltage regulating means;
• said first SCR, said capacitor and said choke circuit forming a first SCR-capacitor-choke branch and said second SCR, said capacitor and said choke circuit forming a second SCR-capacitor-choke branch wherein said choke circuit generating an opposite inductive voltage in each of said branches for alternately charging said capacitor thus generating said oscillating voltage of opposite signs in each of said branches whereby said first and second SCRs being provided in said circuit for generating large oscillating voltage without a requirement to sustain a minimum relay current as required by a bridge type oscillator;
• said voltage oscillating means further includes a transformer circuit opposite said choke circuit and said transformer circuit converts said oscillating voltages in said SCR-capacitor-choke branches to said large-amplitude oscillating voltages;
• said voltage oscillating means further includes a first diode connected in parallel but of opposite polarity to said first SCR between the input end and the output end of said first SCR and a second diode connected in parallel but of opposite polarity to said second SCR between the input end and the output end of said second SCR wherein said first and second diode further isolates said first and second SCRs from a voltage variation from said transformer circuit;
• a capacitor filtering means connected in parallel between said power supply switching means and said voltage oscillating means for reducing signal noises transmitting from said power supply switching means to said voltage oscillating means;
• a voltage regulating means connected in series between said power supply switching means and said voltage oscillating means for regulating said input voltage;
• an oscillator protection means connected in series between said power supply switch means and said voltage regulating means for protecting said oscillating means from being damaged by current overflow, said oscillator protection means including a current fuse for breaking the current loop upon an occurrence of current overflow;
• and
• a gate driver means connected in parallel between said power supply means and said voltage oscillating means for generating a driving voltage to said voltage oscillating means for generating said large-amplitude oscillating voltage when said solid state relay is switched on for controlling a frequency of said large-amplitude oscillating voltage.

A method for protecting a large-amplitude oscillating voltage generator including a power supply means for providing an input voltage to a non-bridge capacitor-type non-resonant voltage oscillating means comprising the steps of:

• (a) utilizing a power supply switching means including a solid state relay (SSR) for connecting to and for switching on and off said power supply means;
• (b) connecting a voltage regulating means in series between said power supply switching means and said voltage oscillating means for regulating said input voltage;
• (c) connecting a capacitor filtering means in parallel between said power supply switching means and said voltage oscillating means for reducing signal noises transmitting from said power supply switching means to said voltage oscillating means;
• (d) connecting an oscillator protection means in series between said power supply switch means and said voltage regulating means for protecting said oscillating means from being damaged by current overflow, said oscillator protection means including a current fuse for breaking the current loop upon an occurrence of current overflow;
• (e) connecting a gate driver means in parallel between said power supply means and said voltage oscillating means for generating a driving voltage to said voltage oscillating means for generating said large-amplitude oscillating voltage when said solid state relay is switched on for controlling a frequency of said voltage oscillating means;
• (f) utilizing in said voltage oscillating means a SCR-capacitor-choke oscillating circuit including a first SCR, a second SCR, a common capacitor-choke circuit including a common capacitor and a common choke connected in series wherein said capacitor and said choke forming wherein said a common capacitor-choke circuit connected in parallel to said first and said second SCRs where said first SCR connected to a first end of said voltage regulating means and said second SCR connected to the opposite end of said voltage regulating means;
• and
• (g) configuring said first SCR, said common capacitor-choke circuit in forming a first SCR-capacitor-choke branch and said second SCR and said common capacitor-choke circuit in forming a second SCR-capacitor-choke branch wherein said common choke generating an opposite inductive voltage in each of said branches for alternately charging said common capacitor thus generating said oscillating voltage of opposite signs in each of said branches whereby said first and second SCRs being provided in said circuit for generating large oscillating voltage without a requirement to sustain a minimum relay current as required by a bridge type oscillator.