JP6870976B2 - X-ray high voltage device and X-ray diagnostic device - Google Patents

Description

Embodiments of the present invention relate to an X-ray high voltage device and an X-ray diagnostic device.

Some X-ray diagnostic devices use an X-ray tube including a rotating anode as an X-ray generation source. The rotation of the rotating anode is controlled by a starter so as to operate in one of three modes, for example, a stop mode, a low speed mode (for example, 60 Hz (rotation / second)), and a high speed mode (for example, 180 Hz).

The X-ray tube including the rotating anode has a unique resonance rotation frequency (resonance point, for example, around 100 Hz). At the resonance point, the mechanical vibration of the member becomes large. Therefore, if the rotation is performed for a long time near the resonance point, for example, the bearing bearing of the rotating shaft may be damaged. Therefore, when performing rotation control accompanied by passing through the resonance point, such as when stopping from the high-speed mode, it is preferable that the starter controls the rotation of the anode so as to pass through the resonance point as quickly as possible.

However, if the power supply to the starter is stopped while the anode is rotating, the starter cannot control the rotation of the anode, and the anode continues to coast. For this reason, if the power supply to the starter is stopped while rotating at a rotation speed higher than the resonance point, the rotation speed of the anode will slowly pass through the resonance point, causing damage to the bearing bearing and noise problems. It will occur.

As a technique for quickly stopping the anode when the power supply to the starter of this type is stopped, for example, the starter is composed of an inverter, and when the power supply to the starter is stopped, the inverter of the starter is driven by using the residual charge of the power storage member. A technique for braking the anode has been developed by passing an alternating current having a frequency corresponding to a target rotation speed lower than the resonance point from the starter to the stator coil.

However, in this type of technology, it is necessary to control the pulse width of the drive signal input to the inverter of the starter even when the power supply to the starter is stopped, which is very complicated.

Japanese Unexamined Patent Publication No. 2013-37998

An object to be solved by the present invention is to provide an X-ray high-voltage device and an X-ray diagnostic device capable of rapidly decelerating the rotation of the X-ray tube anode when the power supply to the starter is stopped with a simple configuration. ..

In order to solve the above-mentioned problems, the X-ray high-voltage device according to the embodiment of the present invention has a capacitor bank, is supplied with power from an AC power source, and stores electricity in the capacitor bank while rotating the anode of the X-ray source. The rotating anode is supplied with a high voltage circuit that applies a high voltage between the capacitor and the cathode of the X-ray source, and an alternating current is supplied to a stator coil that is supplied from the AC power supply and drives the rotating anode to rotate. It is provided with a starter for controlling the rotation of the starter and a braking unit for braking the rotating anode by supplying an alternating current from the capacitor bank to the stator coil when the power supply to the starter is stopped. ..

The block diagram which shows an example of the X-ray diagnostic apparatus including the X-ray high voltage apparatus which concerns on 1st Embodiment of this invention. The block diagram which shows the structural example of the X-ray high voltage apparatus which concerns on 1st Embodiment schematicly. The block diagram which shows an example of the function realized by the processing circuit which concerns on 1st Embodiment. FIG. 5 is a flowchart showing an example of a procedure for rapidly decelerating the rotation of the rotating anode when the power supply to the starter is stopped by the X-ray high voltage device shown in FIG. The block diagram which shows the structural example of the X-ray high voltage apparatus which concerns on 2nd Embodiment schematicly. The block diagram which shows an example of the function realized by the processing circuit which concerns on 2nd Embodiment.

Embodiments of the X-ray high-voltage device and the X-ray diagnostic device according to the present invention will be described with reference to the accompanying drawings. The X-ray diagnostic apparatus according to the following embodiment may be capable of fluoroscopy or imaging and may include an X-ray source including a rotating anode, and includes, for example, an X-ray TV apparatus.

(First Embodiment)
FIG. 1 is a block diagram showing an example of an X-ray diagnostic apparatus 10 including an X-ray high voltage apparatus 1 according to the first embodiment of the present invention.

As shown in FIG. 1, the X-ray diagnostic apparatus 10 includes an image pickup apparatus 11 and an image processing apparatus 12. The imaging device 11 of the X-ray diagnostic device 10 is usually installed in a laboratory and is configured to generate image data relating to the subject O. The image processing device 12 is installed in an operation room adjacent to the examination room, and is configured to generate and display an X-ray image based on the image data. The image processing device 12 may be installed in the examination room where the image pickup device 11 is installed.

The imaging device 11 includes an X-ray high voltage device 1, an X-ray detector 13, an X-ray source 14 including a rotating anode 52, a C arm 15, a bed 16, a top plate 17, and a controller 18.

In the following description, an example in which the X-ray detector 13 and the X-ray source 14 are supported by the C arm 15 will be described, but the C arm 15 is not an indispensable configuration, and the X-ray detector 13 and the X-ray source are not required. It suffices that 14 and 14 are arranged to face each other with the subject O in between. For example, instead of the C arm 15, the X-ray detector 13 and the X-ray source 14 may be supported by independent support members.

The X-ray detector 13 is provided at one end of the C arm 15 so as to face the X-ray source 14 with the subject O supported by the top plate 17 of the sleeper 16 interposed therebetween. The X-ray detector 13 is composed of, for example, a flat panel detector (FPD), detects X-rays irradiated to the X-ray detector 13, and obtains an X-ray fluoroscopic image based on the detected X-rays. Output the image data of the X-ray photographed image. This image data is given to the image processing device 12 via the controller 18. The X-ray detector 13 may be configured by using an image intensifier, a TV camera, or the like.

The X-ray source 14 is provided at the other end of the C-arm 15 and has an X-ray diaphragm. The X-ray diaphragm is, for example, an X-ray irradiation field diaphragm composed of a plurality of lead blades. The X-ray diaphragm is controlled by the controller 18 to adjust the X-ray irradiation range.

The C-arm 15 integrally holds the X-ray detector 13 and the X-ray source 14. When the C-arm 15 is controlled and driven by the controller 18, the X-ray detector 13 and the X-ray source 14 move together around the subject O.

The imaging device 11 of the X-ray diagnostic device 10 may be a biplane type having two X-ray irradiation systems including an X-ray detector 13, an X-ray source 14, and a C-arm 15. When the biplane type image pickup device 11 is provided, the X-ray diagnostic device 10 individually irradiates an X-ray beam from two directions, a floor-standing type C arm and a ceiling traveling type Ω arm, to provide a biplane image (Frontal side). Images and Lateral side images) can be acquired. Instead of the ceiling traveling type Ω arm, a ceiling traveling type C arm type may be used.

The bed 16 is installed on the floor and supports the top plate 17. The sleeper 16 is controlled by the controller 18 to move or rotate (roll) the top plate 17 in the horizontal direction and the vertical direction.

The controller 18 has at least a processor and a storage circuit. The controller 18 is controlled by the image processing device 12 according to the program stored in the storage circuit, executes X-ray fluoroscopic imaging of the subject O by controlling the X-ray irradiation system, and generates image data. It is given to the image processing device 12.

Although FIG. 1 shows an example in which the controller 18 and the image processing device 12 are connected by wire, the controller 18 and the image processing device 12 may be connected so as to be able to transmit and receive data via a network.

On the other hand, as shown in FIG. 1, the image processing device 12 has a display 21, an input circuit 22, a storage circuit 23, and a control circuit 24.

The display 21 is composed of a general display output device such as a liquid crystal display or an OLED (Organic Light Emitting Diode) display, and displays an X-ray image generated by the control circuit 24 under the control of the control circuit 24.

The input circuit 22 is composed of general input devices such as a trackball, a switch button, a mouse, a keyboard, and a numeric keypad, and outputs an operation input signal corresponding to the user's operation to the control circuit 24.

The storage circuit 23 has a configuration including a recording medium that can be read by a processor, such as a magnetic or optical recording medium or a semiconductor memory. Some or all of the programs and data in these storage media may be configured to be downloaded by communication via an electronic network. The storage circuit 23 is controlled by the control circuit 24 and stores, for example, image data output from the image pickup apparatus 11.

The control circuit 24 is a processor that reads a program stored in the storage circuit 23 and executes various processes. For example, the control circuit 24 controls the image pickup device 11 including the X-ray high voltage device 1 via the controller 18 according to an instruction from the user via the input circuit 22, and executes X-ray fluoroscopy and X-ray imaging. Further, the control circuit 24 generates an X-ray image such as an X-ray fluoroscopic image or an X-ray photographed image based on the image data received from the image pickup device 11 and displays it on the display 21.

FIG. 2 is a block diagram schematically showing a configuration example of the X-ray high voltage device 1 according to the first embodiment.

The X-ray high-voltage device 1 includes a high-voltage circuit 31 and a starter 32 that receive power from an AC power supply 30, a processing circuit 33, and a switching circuit 34. The X-ray high voltage device 1 may include an X-ray source 14.

The high voltage circuit 31 includes a power on / off control circuit 41, a rectifier circuit 42, a capacitor bank 43, a high voltage inverter 44, and a high voltage transformer 45. Further, the high voltage circuit 31 according to the present embodiment further includes a discharge circuit 46 for discharging the stored power of the capacitor bank 43.

The power on / off control circuit 41 includes, for example, a conductor and a relay circuit, and is controlled by the processing circuit 33 to control the on / off of the power supply from the AC power supply 30 to the X-ray high voltage device 1.

The power supplied from the AC power supply 30 to the high voltage circuit 31 is given to the rectifier circuit 42 via the power on / off control circuit 41, rectified by the rectifier circuit 42, stored in the capacitor bank 43, and smoothed to become DC power. Will be converted. This DC power is switched by the high-voltage inverter 44, increased in voltage by the high-voltage transformer 45, and applied to the X-ray source 14.

The discharge circuit 46 is composed of, for example, a switch and a resistor. The switch of the discharge circuit 46 is controlled by the processing circuit 33. In the present embodiment, when the power supply from the AC power supply 30 to the X-ray high voltage device 1 or the starter 32 is stopped and the rotating anode 52 is rotating in the low speed mode, the processing circuit 33 is a discharge circuit. By short-circuiting the switch of 46 and connecting the capacitor bank 43 and the resistor, the stored power of the capacitor bank 43 is consumed by the resistor and discharged. On the other hand, in other cases, the processing circuit 33 keeps the switch of the discharge circuit 46 open.

Astrophysical X-ray source 14, as shown in FIG. 2, the X-ray source 14 has a filament 51 as a cathode, a rotating anode 52, a rotor 53, and a stator coil 54. The rotating anode 52 generates X-rays due to the collision of thermions from the filament 51 as a cathode. The high voltage circuit 31 applies a high voltage between the filament 51 and the rotating anode 52. The rotor 53 is connected to the rotary anode 52 and rotates integrally with the rotary anode 52.

The stator coil 54 generates a rotating magnetic field to rotationally drive the rotating anode 52 via the rotor 53. For example, as shown in FIG. 2, the stator coil 54 is connected to a main conductor M connected to one end of the main coil, a sub conductor S connected to one end of the sub coil, and the other end of the main coil and the other end of the sub coil. It has three conductors of the common conductor C.

The rotation number of the rotating anode 52 is controlled via the starter 32 by the processing circuit 33, and the rotating anode 52 rotates at a rotation speed higher than the resonance rotation frequency in a high-speed mode and the rotation anode 52 rotates at a rotation speed lower than the resonance rotation frequency. It operates in at least three operation modes, a low-speed mode in which the 52 rotates and a stop mode.

The starter 32 is supplied with power from the AC power supply 30 and is controlled by the processing circuit 33 to control the rotation of the rotating anode 52 by supplying the processing circuit 33 with an alternating current having a frequency corresponding to the operation mode to the stator coil 54. .. The starter 32 may be configured by using an inverter or a chopper as long as it can output an alternating current corresponding to each of the high-speed mode and the low-speed mode.

The processing circuit 33 has at least a processor and a storage circuit. By reading and executing the program stored in the storage circuit, the processor of the processing circuit 33 executes a process for rapidly decelerating the rotation of the rotating anode 52 when the power supply to the starter 32 is stopped with a simple configuration.

The switching circuit 34 has a first switching circuit 56 and a second switching circuit 57. The first switching circuit 56 includes a switch for connecting the AC power supply 30 and the starter 32 via the power supply on / off control circuit 41. The second switching circuit 57 connects a switch for connecting the anode of the capacitor bank 43 to one of the sub-conductor S and the common conductor C, and connecting the cathode of the capacitor bank 43 to the other of the sub-conductor S and the common conductor C. Including.

Here, a braking method of the rotating anode 52 by the processing circuit 33 according to the present embodiment will be described.

When the power supply from the AC power supply 30 to the starter 32 is stopped and the rotating anode 52 is rotating in the high-speed mode, the rotating anode 52 is moved so that the rotation of the rotating anode 52 quickly passes through the resonance point. Braking is preferred. As this braking method, for example, the starter 32 is composed of an inverter, and when the power supply to the inverter is stopped, the inverter is driven by using the residual power of the capacitor bank, and an alternating current having a frequency corresponding to a target rotation speed lower than the resonance point is applied. A method of braking the anode by flowing the current from the inverter to the stator coil is known.

However, this method is very complicated because it is necessary to control the pulse width of the drive signal input to the inverter of the starter even when the power supply from the AC power supply to the starter is stopped.

Therefore, in the processing circuit 33 according to the present embodiment, when the power supply from the AC power supply 30 to the starter 32 is stopped and the rotating anode 52 is rotating in the high-speed mode, the capacitor bank 43 to the stator coil 54 The rotating anode 52 is braked by supplying a direct current to the rotating anode 52. That is, in the present embodiment, the inverter is not required for braking the rotating anode 52.

FIG. 3 is a block diagram showing an example of a function realized by the processing circuit 33 according to the first embodiment.

As shown in FIG. 3, the processing circuit 33 has at least a power failure detection function 61, a rotation speed control function 62, a braking function 63, and a discharge control function 64.

The power failure detection function 61 is performed from the AC power supply 30 by a user instructing the power to be turned off via the power on / off control circuit 41, a power off instruction via a power switch (not shown), or stopping the power supply of the AC power supply 30 due to a power failure or the like. Detects the stop of power supply to the starter 32 and notifies the braking function 63. The power supply cutoff detection function 61 may detect, for example, the stop of power supply to the starter 32 from the operation of the relay circuit of the power supply on / off control circuit 41, or the path from the power supply on / off control circuit 41 to the first switching circuit 56. The stop of the power supply to the starter 32 may be detected above.

The rotation speed control function 62 controls the rotation speed of the rotation anode 52 by controlling the starter 32. The rotation speed control function 62 controls the output of the starter 32 so as to rotate the rotating anode 52 in the high-speed mode when the high-speed mode is specified by the user, for example, via the input circuit 22.

Further, the rotation speed control function 62 gives information on the current rotation speed of the rotation anode 52 to the braking function 63. The rotation speed information may be always given to the braking function 63 from the rotation speed control function 62 in real time, or may be given to the braking function 63 every time it is requested.

The braking function 63 opens the first switching circuit 56 and switches the second switching circuit 56 when the power supply from the AC power supply 30 to the starter 32 is stopped and the rotating anode 52 is rotating in the high-speed mode. By short-circuiting the circuit 57, a direct current is supplied from the capacitor bank 43 to the stator coil 54 to brake the rotating anode 52. On the other hand, in other cases, the first switching circuit 56 is short-circuited and the second switching circuit 57 is opened.

The X-ray source 14 may include a plurality of X-ray tubes including the rotating anode 52. In this case, the braking function 63 brakes the rotating anode 52 during the rotating operation.

The discharge control function 64 discharges the processing circuit 33 when the power supply from the AC power supply 30 to the X-ray high voltage device 1 or the starter 32 is stopped and the rotating anode 52 is rotating in the low speed mode. By short-circuiting the switch of the circuit 46 and connecting the capacitor bank 43 and the resistor, the stored power of the capacitor bank 43 is consumed by the resistor and discharged. On the other hand, in other cases, the discharge control function 64 keeps the switch of the discharge circuit 46 open. For example, when the power supply from the AC power supply 30 to the starter 32 is stopped and the rotating anode 52 is rotating in the high-speed mode, the discharge control function 64 keeps the switch of the discharge circuit 46 open.

Next, an example of the operation of the X-ray high voltage device 1 and the X-ray diagnostic device 10 according to the present embodiment will be described.

FIG. 4 is a flowchart showing an example of a procedure for rapidly decelerating the rotation of the rotating anode 52 when the power supply to the starter 32 is stopped by the X-ray high voltage device 1 shown in FIG. In FIG. 4, reference numerals with numbers attached to S indicate each step of the flowchart.

In this procedure, the rotation speed control function 62 rotates the rotating anode 52 in either the high-speed mode or the low-speed mode, X-rays are generated from the X-ray source 14, and electric power is stored in the capacitor bank 43. It will start with. Further, at the start time, it is assumed that the first switching circuit 56 is short-circuited, the second switching circuit 57 is opened, and the switch of the discharge circuit 46 is opened.

First, in step S1, the power supply disconnection detection function 61 of the processing circuit 33 determines whether or not the stop of power supply from the AC power supply 30 to the starter 32 is detected. When it is detected that the power supply from the AC power supply 30 to the starter 32 has stopped, the process proceeds to step S2. On the other hand, when the power supply to the starter 32 is continued, the power failure detection function 61 continues to monitor the stop of the power supply to the starter 32.

Next, in step S2, the braking function 63 acquires information on the current operation mode of the rotating anode 52 based on the information from the rotation speed control function 62, and determines whether or not it is in the high-speed mode.

In the high-speed mode (YES in step S2), the braking function 63 applies a direct current from the capacitor bank 43 to the stator coil 54 to brake the rotating anode 52 (step S3). Specifically, the braking function 63 opens the first switching circuit 56 and short-circuits the second switching circuit 57.

On the other hand, when the mode is not the high speed mode but the low speed mode (NO in step S2), the discharge control function 64 discharges the stored power of the capacitor bank 43 by the discharge circuit 46 (step S4). Specifically, the discharge control function 64 short-circuits the switch of the discharge circuit 46 to connect the capacitor bank 43 and the resistor, so that the stored power of the capacitor bank 43 is consumed by the resistor and discharged. At this time, the first switching circuit 56 remains short-circuited, and the second switching circuit 57 remains open.

By the above procedure, the rotation of the rotary anode 52 can be quickly decelerated when the power supply to the starter 32 is stopped with a simple configuration.

The X-ray high-voltage device 1 according to the present embodiment has the residual energy of the capacitor bank 43 when the power supply from the AC power supply 30 to the starter 32 is stopped and the rotating anode 52 is rotating in the high-speed mode. The rotating anode 52 is braked by passing a direct current through the stator coil 54 using the above. Therefore, even if the power supply is cut off due to a power failure or operation while the rotating anode 52 is rotating in the high-speed mode, the rotating anode 52 can be quickly decelerated with a very simple configuration. , The resonance point can be passed quickly.

Further, the residual energy of the capacitor bank 43 is generally used only for discharging the residual energy to prevent danger when the power is cut off. However, the X-ray high voltage device 1 according to the present embodiment uses this residual energy as the rotating anode 52. It can be effectively used for braking.

(Second Embodiment)
Next, a second embodiment of the X-ray high voltage device and the X-ray diagnostic device according to the present invention will be described.

FIG. 5 is a block diagram schematically showing a configuration example of the X-ray high voltage device 1A according to the second embodiment. Further, FIG. 6 is a block diagram showing an example of a function realized by the processing circuit 33A according to the second embodiment.

The X-ray high voltage device 1A shown in the second embodiment is different from the X-ray high voltage device 1 shown in the first embodiment in that the discharge circuit 46 is not provided and the processing circuit 33A is not provided with the discharge control function 64. .. Since other configurations and operations are not substantially different from those of the X-ray high voltage apparatus 1 shown in FIG. 1, the same configurations are designated by the same reference numerals and description thereof will be omitted.

When the power supply disconnection detection function 61 detects that the power supply from the AC power supply 30 to the starter 32 is stopped, the braking function 63A of the processing circuit 33A switches the first switching circuit 56 regardless of the operation mode of the rotating anode 52. A direct current is supplied from the capacitor bank 43 to the stator coil 54 by opening and short-circuiting the second switching circuit 57. That is, in the present embodiment, steps S2 and S4 are omitted from the flowchart shown in FIG. 4, and step S3 is immediately executed after the detection determination of the power failure in step S1 to end the series of procedures.

The X-ray diagnostic apparatus provided with the X-ray high-voltage device 1A and the X-ray high-voltage device 1A according to the present embodiment also causes a power failure due to a power failure or operation when the rotating anode 52 is rotating in the high-speed mode. Even in this case, the rotating anode 52 can be quickly decelerated with a very simple configuration, so that the resonance point can be quickly passed. Further, the residual energy of the capacitor bank 43 can be effectively used for braking the rotating anode 52.

According to at least one embodiment described above, the rotation of the rotating anode 52 can be rapidly decelerated when the power supply to the starter 32 is stopped with a simple configuration.

The power failure detection function 61, the rotation speed control function 62, the braking functions 63 and 63A, and the discharge control function 64 of the processing circuit 33 in the present embodiment are the power supply disconnection detection unit and the rotation speed control unit, respectively, within the scope of the claims. This is an example of a braking unit and a discharge control unit.

In the above embodiment, the term "processor" refers to, for example, a dedicated or general-purpose CPU (Central Processing Unit), GPU (Graphics Processing Unit), or application specific integrated circuit (ASIC). It shall mean a circuit such as a programmable logic device (for example, a simple programmable logic device (SPLD), a complex programmable logic device (CPLD), and an FPGA). The processor realizes various functions by reading and executing a program stored in a storage medium.

Further, in the above embodiment, an example in which a single processor of the processing circuit realizes each function has been shown, but a plurality of independent processors are combined to form a processing circuit, and each processor realizes each function. May be good. When a plurality of processors are provided, the storage medium for storing the program may be provided individually for each processor, or one storage medium collectively stores the programs corresponding to the functions of all the processors. May be good.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1, 1A ... X-ray high-voltage device 10 ... X-ray diagnostic device 14 ... X-ray source 30 ... AC power supply 31 ... High-voltage circuit 32 ... Starter 33, 33A ... Processing circuit 43 ... Capacitor bank 46 ... Discharge circuit 52 ... Rotating anode 54 ... Stator coil 61 ... Power failure detection function 62 ... Rotation speed control function 63 ... Braking function 63A ... Braking function 64 ... Discharge control function C ... Common conductor M ... Main conductor S ... Sub conductor

Claims (7)

A high-voltage circuit that has a capacitor bank, is supplied with power from an AC power source, stores electricity in the capacitor bank, and applies a high voltage between the rotating anode of the X-ray source and the cathode of the X-ray source.
A starter that controls the rotation of the rotating anode by supplying an alternating current to a stator coil that is supplied with power from the AC power supply and drives the rotating anode to rotate.
When the power supply to the starter is stopped, a braking unit that brakes the rotating anode by supplying a direct current from the capacitor bank to the stator coil without going through the starter.
X-ray high voltage device equipped with. The stator coil is
It has three conductors: a main conductor connected to one end of the main coil, a sub conductor connected to one end of the subcoil, and a common conductor connected to the other end of the main coil and the other end of the subcoil.
The starter is
The rotation of the rotating anode is controlled by supplying an alternating current to the three conducting wires of the stator coil.
The braking part is
When the power supply to the starter is stopped, the anode of the capacitor bank is connected to one of the sub-conductor wire and the common conductor wire, and the cathode of the capacitor bank is connected to the other wire, thereby connecting the capacitor bank to the stator coil. To brake the rotating anode by supplying a direct current without going through the starter.
The X-ray high voltage device according to claim 1. A rotation speed control unit that controls the rotation speed of the rotation anode by controlling the starter.
With more
The rotating anode is
The rotation speed is controlled by the rotation speed control unit via the starter, and the rotation anode rotates at a rotation speed higher than the resonance rotation frequency, and the rotation at a rotation speed lower than the resonance rotation frequency. Rotate in one of at least two modes of operation, a second rotation mode in which the anode rotates,
The X-ray high voltage device according to claim 1 or 2. The braking part is
When the rotation speed control unit rotates the rotating anode in the first rotation mode and the power supply to the starter is stopped, the capacitor bank connects the stator coil to the stator coil without the starter. Braking the rotating anode by supplying a direct current,
The X-ray high voltage device according to claim 3. A discharge circuit for discharging the stored power of the capacitor bank and
When the rotation speed control unit rotates the rotating anode in the second rotation mode and the power supply to the starter is stopped, the capacitor bank and the discharge circuit are connected to the capacitor bank. While discharging the stored power of the above, in other cases, the discharge control unit that keeps the connection between the capacitor bank and the discharge circuit open.
4. The X-ray high voltage device according to claim 4. A power supply disconnection detection unit that detects the stoppage of power supply from the AC power supply to the starter and notifies the braking unit.
The X-ray high-voltage device according to any one of claims 1 to 5, further comprising. An astrophysical X-ray source having a cathode and a rotating anode driven by a stator coil.
A high-voltage circuit that has a capacitor bank, is supplied with power from an AC power supply, and applies a high voltage between the cathode and the rotating anode while storing electricity in the capacitor bank.
A starter that controls the rotation of the rotating anode by supplying an AC current to the stator coil, which is supplied with power from the AC power supply.
When the power supply to the starter is stopped, a braking unit that brakes the rotating anode by supplying a direct current from the capacitor bank to the stator coil without going through the starter.
X-ray diagnostic device equipped with.

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