Rotor controller systems for X-ray tubes
AssigneeAdvanced Instrument Development, Inc.
InventorLouis L. Fiocca
Life of this patent
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Abstract
A system for controlling the operation of the starter for X-ray tubes and more specifically the acceleration and operation of the rotating anodes of the X-ray tubes in accordance with any one of several X-ray exposure functions to be performed. The system includes D.C. braking controls, means to prevent X-ray exposure during the acceleration and deceleration periods, and means for assuring that one operating sequence is terminated before a succeeding operating sequence is initiated.
Claims7
A system operable from an alternating current source for controllably providing power to an induction motor for driving rotating anodes of X-ray tubes;
- means for receiving the power at a line frequency and multiplying the line frequency;
- drive means for driving the motor and hence the anode;
- a phase shift network for selectively shifting the phase of the multiplied line frequency;
- said drive means being responsive to said phase shift network for selectively driving said motor at a first and at a second selected running speed and for accelerating said motor to the selected running speed dependent on the output of said phase shift network;
- and logic circuitry comprising first means for selectively connecting said phase shift network to select the X-ray tube anode to be rotated, second means for selecting the speed at which the anode is to be rotated, and acceleration timer means for controlling the length of time the drive means accelerates an anode dependent on the anode selected and the selected running speed.
Dependencies are inferred from the claim text.