| 摘要 |
In a high voltage generator including a flyback transformer having a low-voltage coil and a high-voltage coil, a first switching element is disposed in a current path between a drive power source, the low-voltage coil and ground. The first switching element is turned on and off so as to charge and discharge a resonance capacitor, thereby generating flyback pulses. An output voltage of the high-voltage coil is detected. A peak value of the flyback pulse is controlled based on the detected output voltage so as to stabilize the output voltage of the high-voltage coil. A second switching element is located in the current path between the drive power source, the low-voltage coil and ground. The second switching element is turned on the moment the first switching element is turned off, thereby transferring electrical energy stored in the low-voltage coil to the resonance capacitor. After the transfer of the electric energy, a charging capacitor is charged by an inverse current flowing from the resonance capacitor to the drive power source.
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