| 摘要 |
A phase-shift modulation resonant inverter is turned on and off by built-in switches Q1 and Q2. An inductor L and a load capacitor C are used to produce vibration output from the inverter. A current sampling circuit is employed to take samples of resonant current. A controller is used to adjust the shift angle between the phase of switches Q1 and Q2 and that of resonance current. This invention features simple structure, flexible control and a wide range of voltage changes, with an efficiency up to 98%.
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