| 摘要 |
The invention is a resonance current source which comprises a DC voltage source VS, series connection of two semiconductor couplers Q1, Q2 which are connected in parallel with the abovementioned DC voltage source VS in such a way that the couplers Q1, Q2 can be made conductive in turn, a transformer T1 which comprises a primary coil L1 set up on the transformer core, the first pole of which is connected to a connection point P1 between the abovementioned semiconductor couplers Q1, Q2, and a secondary coil L2 which is connected to a rectifier 2, at least one capacitance C1, C2 which is connected between one of the poles of the abovementioned DC voltage source and one pole of the primary coil of the transformer. The power source in this invention comprises a first resonance circuit, which consists of the stray inductance of the transformer T1 and at least one capacitance C1, C2 for converting the wave form of the current in the primary coil of the transformer into essentially a sine-wave form at least at the moment when the semiconductor couplers are connected, and a second resonance circuit which consists of the inductance of the transformer T1 and capacitors C3, C4 acting across the semiconductor couplers Q1, Q2. <IMAGE>
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