JPH07282991A - Drive device of rotary anode of x-ray tube - Google Patents

Abstract

PURPOSE:To provide a rotary anode drive device of an X-ray tube in an X- -ray system equipped with a normal speed X-ray tube device and a treble speed X-ray tube device, with which the two modes of anode rotation can be switched using a single unit of anode drive device. CONSTITUTION:An X-ray control device 1 selects a rotary anode X-ray tube device 3 operating with the rotating speed specified, and an appropriate select signal 2e is fed to an anode drive device 2. A control pulley plate 2f having received the select signal 2e switches over the output voltage of an insulative transformer 2d and the drive frequency while controlling a switching element 2b according to the drive control data stored in a built-in ROM and a relay 2c for changing over the rotating speed. This allows a single unit of anode drive device 2 to drive the selected X-ray tube device 3 under the operating conditions which suit the applicable rotating speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray apparatus used for medical examinations and the like, and more particularly to a rotary anode X-ray tube anode drive apparatus for controlling the anode drive of a rotary anode X-ray tube.

[0002]

2. Description of the Related Art In general, a rotary anode type X-ray tube device is used for the purpose of preventing electron burnout of the anode when the intensity of X-rays is increased. The rotating anode X-ray tube device has a normal rotation (about 60 times / second) and a triple rotation (about 180 times / second).
Seconds).

By the way, in this type of rotary anode X-ray tube device, when the number of revolutions of the anode is increased from the stopped state to the prescribed number of revolutions, the voltage to be applied is set relatively high in order to shorten the starting time. On the other hand, after reaching the constant speed rotation, the voltage is set relatively low in order to suppress the heat generated. Therefore, the starting voltage, starting time, voltage at constant speed rotation, braking voltage, braking time, etc. are different between the normal rotation and triple rotation X-ray tube devices. When both the rotating and triple rotation X-ray tube devices are used together, the anode drive device also requires two types, one for normal rotation and one for triple rotation. Also, in order to raise the anode of the X-ray tube device from the stopped state to the specified number of revolutions as quickly as possible, or when it is desired to increase the tube current during fluoroscopy, another insulating transformer can be used to increase the number of revolutions of the anode. there were.

[0004]

However, in such a rotating anode X-ray tube anode driving apparatus, as described above, an anode driving apparatus is required for each of the normal rotation and higher speed X-ray tube apparatuses. Therefore, the number of units of the system is increased and the installation space of the device is also increased. In addition, when switching the X-ray tube device, the anode driving device also needs to be switched, so that a switching circuit is required, and the circuit configuration of the entire system becomes complicated.

The present invention has been made to solve the above problems, and X-rays arbitrarily selected from rotating anode X-ray tube devices (for example, normal rotation and triple rotation) having different rotation speeds. Rotating anode X-ray tube anode capable of switching and controlling operating conditions such as starting voltage, starting time, voltage at constant speed rotation, control voltage, and control time suitable for the tube device with one device An object is to provide a drive device.

[0006]

In order to achieve this object, according to the present invention, an X-ray tube device (normal rotation or higher speed rotation) used by an X-ray controller in a rotary anode X-ray tube anode driving device is used. ) Is selected, the drive control data corresponding to the selected X-ray tube device is sent to each constituent circuit unit, and the operating conditions of each constituent circuit are changed to those suitable for the selected X-ray tube device. A means for switching control is provided.

[0007]

In this rotating anode X-ray tube anode driving device,
In accordance with the operating conditions suitable for the rotating anode X-ray tube device to be selectively used, that is, the driving conditions such as voltage and time to be supplied at each operation such as starting of each anode rotation, constant speed rotation, braking, etc. It controls each circuit section in the cathode ray tube anode driving device. For example, on / off control of a switching element (control of drive frequency), tap switching of an insulation transformer, etc. are performed, and this one circuit anode X-ray tube anode drive device selectively uses a rotary anode X-ray tube at each time point. Drive control suitable for the device becomes possible.

This eliminates the need for a conventional switching circuit for each anode driving device, a normal rotating anode driving device, etc.
The installation space of the entire line device system can be reduced and the operation can be simplified.

[0009]

1 is a block diagram showing an embodiment of an X-ray system having a rotating anode X-ray tube anode driving device according to the present invention. In the figure, 1 is an X-ray control device, 2 is a rotating anode X-ray tube anode drive device to which an X-ray tube device selection signal is transmitted from the X-ray control device 1, and 3 is an X-ray tube driven by an anode drive device 2. It is a device.

First, the X-ray control device 1 selects the X-ray tube device 3 instructed by the control circuit, transmits a selection signal 2e to the rotary anode X-ray tube anode drive device 2, and selects the selected X-ray tube. It indicates whether the device 3 is a normal rotation, a triple rotation, or both. Further, the rotary anode X-ray tube anode driving device 2 is a rectifier 2 that rectifies a rotary anode driving power source 4 of 200 V AC.
a, a switching element 2b, a switching relay 2c for switching taps of the insulating transformer 2d, a switching relay 2 for switching each operation of starting anode rotation, rotating at constant speed, and braking
h, a rectifier 2g for DC braking, and a control pre-plate 2f for controlling each of the above circuit parts.
Here, the control pre-plate 2f has a built-in ROM for controlling the drive of the X-ray tube device 3.
The drive control data corresponding to the command from the X-ray controller 1 is sent to each circuit section by the
For example, on / off control of the switching element 2b and tap switching control of the insulating transformer 2d via the switching relay 2c are performed.

Next, the power source 4 for driving the rotary anode is a rectifier 2a.
The output of the rectifier 2a is connected to the switching element 2b.
It is connected to the. The switching element 2b is connected to the switching relay 2c corresponding to normal rotation or triple rotation, and then connected to the input of the insulation transformer 2d, and the output thereof switches operating states such as start-up, constant speed rotation, and braking. It is connected to the relay 2h. Then, the a-contact of the switching relay 2h for the operating state is connected to the main winding 3a and the auxiliary winding 3b of the anode driving winding of the rotary anode X-ray tube device 3 that is selectively used. Further, the b contact, which operates in the opposite direction to the a contact, is connected to the input of the braking rectifier 2g,
The output terminal of the rectifier 2g is connected to the main winding 3a. That is, the output of the rotating anode X-ray tube anode driving device 2 is
Driving voltages are supplied to both the main winding 3a and the auxiliary winding 3b at the time of starting the anode rotation of the X-ray tube device 3 and at the time of constant speed rotation, and only to the main winding 3a at the time of braking. .

Next, the operation of this X-ray system is as follows.
The X-ray tube apparatus 3 used by the X-ray control apparatus 1 is selected, and whether the selected X-ray tube apparatus 3 which is switched in a circuit and is connected is rotated normally or tripled is rotated by a signal 2e. Instruct the tube anode driver 2. As a result, the anode drive device 2 is switched to the switching relay 2c in the normal rotation.
Is turned on, and if it is triple rotation, it is turned off.
Switch the input terminal of to control the output voltage. When the starting operation is performed by the starting signal 2j from the X-ray controller 1 in this state, the anode driving device 2 outputs the control signal according to the control data of the ROM in the control pre-plate 2f, and controls the switching element 2b to be turned on and off. Isolation transformer 2d
The rotary anode of the X-ray tube device 3 is activated via the, and constant speed rotation control is performed. That is, the voltages according to the respective control data for start-up, constant speed rotation, and braking are applied to the main and auxiliary anode drive windings 3a and 3b. At this time, the pulse width generated in the switching element 2b is widened at the time of starting, and the pulse width is narrowed at the time of constant speed rotation, whereby the anode of the X-ray tube device 3 is regulated within a relatively short time from the stopped state. After reaching the rotation speed and reaching the specified rotation speed, the constant speed rotation is maintained while suppressing the heat generated. Further, the drive frequency is different between normal rotation and triple rotation, and the switching element 2b is set to 60 Hz in normal rotation by the X-ray tube device selection signal 2e sent from the X-ray controller 1 to the control pre-plate 2f. In double rotation, they are driven at 180 Hz. Further, when the stop operation is performed by the rotation stop signal, in the anode drive device 2, the contact a of the operation switching relay 2h is turned off, and the voltage from the insulating transformer 2d is input to the braking rectifier 2g through the contact b of the switching relay 2h. Then, the output is supplied to the main winding 3a of the X-ray tube device 3. As a result, a DC voltage according to the control data is applied only to the main winding 3a, the rotating anode is controlled by the DC magnetic field, and the rotation speed is reduced.

In this way, both the normal rotating anode tube and the triple rotating anode X-ray tube device can be driven and controlled by the single rotating anode X-ray tube anode driving device 2.

[0014]

As described above, in the rotating anode X-ray tube anode driving apparatus according to the present invention, the rotating anode X-ray tube apparatus (normal rotation and rotation speed) having different rotation speeds according to the signal from the X-ray controller. (3 times rotation), each drive control such as start-up, constant speed rotation, control, etc. can be performed by one device, so that the anode drive device of each normal rotation and triple rotation X-ray tube device Since the switching circuit and the normal rotating anode drive device are not required, the installation space of the entire device can be reduced and the operation can be simplified.

[Brief description of drawings]

FIG. 1 is a diagram showing a circuit configuration of a rotary anode X-ray tube anode driving device according to the present invention.

[Explanation of symbols]

 1 X-ray controller 2 Rotating anode X-ray tube anode driver 2a Rectifier 2b Switching element 2c Switching relay 2d Insulation transformer 2e X-ray tube device selection signal 2f Control pre-plate 2g Braking rectifier 2h Switching control signal 3 X-ray Tube device 3a Main winding 3b Auxiliary winding 4 Power source for rotating anode drive

Claims (1)

[Claims] 1. In a rotary anode X-ray tube anode driving device in an X-ray system having a plurality of types of rotary anode X-ray tube devices of normal rotation and higher speed rotation, an X-ray tube device to be used is determined and a selection signal is sent. A rotating anode X-ray tube anode driving device comprising means for controlling switching of the operating conditions of each circuit section so as to match the selected X-ray tube device in response to a signal from the control device.