LASER OSCILLATOR POWER SUPPLY DEVICE BASED ON SOFT SWITCHING

PROBLEM TO BE SOLVED: To provide a laser oscillator power supply device based on soft switching, which can realize a small switching loss, less radiation noise, easy EMI countermeasure, high frequency operation, a large power, easy management of a current flowing through a switching element, a single auxiliary power supply, omission of a floating power supply, miniaturization of the device, and so on. SOLUTION: A low-loss power semiconductor is used as a switching element Q1, the element Q1 is connected in parallel to a diode D1 and a capacitor C0, a reactor L0 is added to these elements to form a resonance switch is combination with an L-C resonance circuit, the resonance switch is connected in series with an input power supply Vi, a D.C. blocking capacitor C1 is connected to the power supply to form a primary side, the primary side is connected via a transformer T1 to a secondary side consisting of a reactor L1, a laser oscillator load resistor R1 and capacitors Cd1 and Cd2. As a result, the device can supply a desired range of high frequency output and can have a simplified circuit configuration.