X-ray tube anode speed reducer

Details X-ray tube anode speed reducer X-ray tube anode speed reducer

1990-09-20

1992-02-18

Howell, Janice A.

X-ray or gamma ray systems or devices

Electronic circuit

For electrode movement

378 94, 318269, 318362, H05G 166

Patent

active

050900412

ABSTRACT:
A rotor speed adjustment circuit (60) reduces the rotational speed of an anode (32) of an x-ray tube (14) in a diagnostic apparatus (10). An AC current (64) from an AC current source (54) is applied to one stator winding (52). A parallel connected diode (70) and resistor (72) are connected between the current source and a second stator winding (50) to cause an effective DC magnetic braking component (66b) which reduces the rotational speed of the anode and an associated rotor (42). By selectively adjusting the resistor (72), the size of the DC magnetic braking component, hence the amount of effective drag is selectively adjustable to adjust the anode rotation speed.

REFERENCES:
patent: 3963930 (1976-06-01), Fiocca et al.

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