Stabilized sine wave inverter

Claim 2

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitable winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising energy feedback means from a transformer winding (23 resp. 124, 223) back to the DC side by way of return paths through rectifiers (26, 27, 28 resp. 126, 127 resp. 226, 227, 228) said return paths comprising at least two electrically separated and magnetically coupled sections.

Claim 3

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitable winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising electricaLly separated energy feedback return paths which for magnetic coupling purposes are leading through opposite polarity terminals of inner windings (18.2, 19.2) of a differential transformer, said differential transformer being in parallel connection to at least one portion of winding (16) of the swinging inductor (15)

Claim 4

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitable winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising electricaLly separated energy feedback return paths which for magnetic coupling purposes are leading through opposite polarity terminals of inner windings (18.2, 19.2) of a differential transformer, said differential transformer being in parallel connection to at least one portion of winding (16) of the swinging inductor (15)

Claim 5

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitable winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising electrically separated energy feedback return paths which for magnetic coupling purposes are leading through at least two winding sections (118, 119) of the differential inductor (117), said differential inductor being in parallel connection with at least one portion of winding (116) of swinging inductor (115)

Claim 6

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitable winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising electrically separated energy feedback return paths which for magnetic coupling purposes are leading through at least two winding sections (118, 119) of the differential inductor (117), said differential inductor being in parallel connection with at least one portion of winding (116) of swinging inductor (115)

Claim 7

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitable winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising energy feedback means including return paths originating from a separate winding (23) of transformer (21) comprising at least two electrically separated and magnetically coupled sections

Claim 8

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitable winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising energy feedback means including return paths originating from a separate winding (23) of transformer (21) comprising at least two electrically separated and magnetically coupled sections

Claim 9

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitable winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising energy feedback means including return paths originating from the primary winding (124) of transformer (121) comprising at least two electrically separated and magnetically coupled sections.

Claim 10

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitable winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising energy feedback means including return paths originating from the primary winding (124) of transformer (121) comprising at least two electrically separated and magnetically coupled sections.

Claim 11

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitAble winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising energy feedback means originating from a suitable winding of transformer (221) such feedback energy being rectified and added in series to the direct current power source (230) whereby the voltage level may be regulated by means of controlled current valves.

Claim 12

A stabilized DC-to-AC inverter apparatus capable of transforming DC current into AC current and particularly sinelike AC current, by means of trigger controlled current valves in conjunction with a tuned electrical LC-circuit by feeding DC current from a direct current source through a swinging inductor and current valves, applying chopped DC current with alternating polarities across the terminals of the primary winding of a transformer to which winding there is connected a parallel capacitor, whereby energy may be drained from said transformer by connecting a load to any suitAble winding thereof, comprising stabilizing means for the output value by energy feedback to the DC current input side from said transformer through rectifiers said inverter apparatus comprising energy feedback means originating from a suitable winding of transformer (221) such feedback energy being rectified and added in series to the direct current power source (230) whereby the voltage level may be regulated by means of controlled current valves.