X-ray high voltage device
First Claim
1. A high voltage device comprising a low voltage DC source, a low voltage side inverter of which input side is connected to the low voltage DC source and inverts the current from the low voltage DC source into high frequency AC voltage and outputs the same, a high voltage transformer of which primary winding is connected to the output side of the low voltage side inverter and boosts up the high frequency AC voltage from the low voltage inverter, a high voltage rectifier of which input side is connected to the secondary winding of the high voltage transformer and which rectifies the AC voltage boosted up by the high voltage transformer, a high voltage side capacitor connected to the output side of the high voltage rectifier and a radioactive ray generation device connected between terminals of the high voltage side capacitor, characterized in that electric charge energy stored in the high voltage side capacitor is regenerated from the output side to the input side via the high voltage transformer.
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Accused Products
Abstract
A semiconductor switch 12 connected in series with a smoothing capacitor 12 is constituted by connecting in parallel a diode 13D which permits to flow current regenerated from energy of electric charges stored in a high voltage capacitor 17 to a primary side of a high voltage transformer 15 for the smoothing capacitor 12 and switching means 13S which interrupts an output from the smoothing capacitor 12, and after turning off the switching means 13S, through alternative on and off control of switching means 161S˜164S the energy of electric charges stored in the high voltage capacitor 17 is regenerated to the smoothing capacitor 12 by making use of parasitic leakage inductance 15L. As a result, an X-ray high voltage device is provided which permits to drop a wave tail of a tube voltage in a high speed without complexing the structure of the high voltage part thereof.
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Citations
21 Claims
- 1. A high voltage device comprising a low voltage DC source, a low voltage side inverter of which input side is connected to the low voltage DC source and inverts the current from the low voltage DC source into high frequency AC voltage and outputs the same, a high voltage transformer of which primary winding is connected to the output side of the low voltage side inverter and boosts up the high frequency AC voltage from the low voltage inverter, a high voltage rectifier of which input side is connected to the secondary winding of the high voltage transformer and which rectifies the AC voltage boosted up by the high voltage transformer, a high voltage side capacitor connected to the output side of the high voltage rectifier and a radioactive ray generation device connected between terminals of the high voltage side capacitor, characterized in that electric charge energy stored in the high voltage side capacitor is regenerated from the output side to the input side via the high voltage transformer.
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20. An X-ray high voltage device comprising:
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a DC power supply means with a low voltage electric charge storing means, a DC/AC inverting means which inverts the output of the DC power supply means into a high frequency AC voltage and outputs the same, a high voltage transforming means which boosts up the high frequency AC voltage from the DC/AC inverting means, a rectifying means which rectifies the boosted up high frequency AC voltage and generates a DC high voltage, a high voltage electric charge storing means including stray capacitance of cables connected to the output side of the rectifying means, and an X-ray generating means which is connected between the terminals of the high voltage electric charge storing means and receives DC high voltage from the high voltage electric charge storing means, when an X-ray irradiation command is turned on, and generates X-ray, characterized in that, the rectifying means is provided with a first regenerating means which causes electric charges to flow in reverse direction from the secondary side to the primary side of the high voltage transforming means and a second regenerating means which causes to regenerate electric charges remained in the high voltage electric charge storing means to the low voltage side DC power supply means via the high voltage transforming means, when the X-ray irradiation command is turned off. - View Dependent Claims (21)
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Specification