JPS63248097A - Transformer type x-ray generation apparatus - Google Patents

Abstract

PURPOSE:To make it possible to use a transformer type X-ray generation apparatus even if a power supply facility with a small capacity is provided by composing the apparatus in the caption of a charging circuit outputting DC electric power in spite of the kind of a power supply of alternating current or direct current to be connected to, batteries and a D/A converting circuit. CONSTITUTION:Batteries 3 are connected to an AC power supply with a small capacity and including a commercial power supply or a DC supply 1 through a charging circuit 2, and DC electric power generated by the batteries 3 is converted to AC electric power through such as an inverter 4 converting direct current to alternating current to be supplied to the side of a main transformer 6. Accordingly, a power supply of either alternating current or direct current can be employed, and needed quantity of electric power can be stored not only in a short time but also in a long time so that s transformer type X-ray generation apparatus generating large output can be composed even if a power supply with a small capacity is employed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transformer type X-ray generator particularly suitable when a Koharu FFI power source is used.

[Conventional technology]

As shown in the power supply equipment section of JIS Z4702, conventional equipment requires a distribution transformer with a capacity larger than the power constantly consumed and a low-voltage distribution line with a large cross-sectional area. Also,
A known example close to the present invention is Utility Model Application Publication No. 55-133600.
There is a device described in the above publication, which combines a small-capacity commercial power source and a power storage device using a capacitor.

[Problem that the invention seeks to solve]

RF-500-12 specified in JISZ4702 above
Taking Type 5 as an example, the power at its maximum rating will be determined below, taking into consideration the actual usage conditions.

First, during shooting, the voltage was 125 kV and the current was 500 m.
A. Shooting time Q, 1 sec, repetition frequency 80 times/
Time.

To make the average value into an effective value, a coefficient of 1.11. Power factor 0.9
．． If the efficiency is 0.7, =0.173 kVA/hour −(1
).

For fluoroscopy, the voltage was 120 kV, the current was 4 mA, the repetition frequency was 25 minutes/hour, and the coefficient for converting the average value to the effective value was 1.11. Power factor 0.5. If the efficiency is 0.7, 220X10" 25r
X 1 tears X0.004÷0.5÷0.7X-=0.44
9 kVA/hour ・(2).

Therefore, the average power per hour is 0.62 in total
2 (=0.173+0.449) kVA. Even if you combine the power normally consumed by equipment related to an X-ray apparatus other than the power for generating X-rays, the total amount is several kVA. On the other hand, in the above JIS, 10
50kV as input power supply equipment with a voltage drop of less than %
A is requesting the installation of a distribution transformer. Power supply equipment is shown in the X-ray table [i! Although it is a burden on the IN operator, reducing that burden is a great benefit for the purchaser, and it is also a great benefit for the power supplier to increase the efficiency of equipment usage. .

In the device described in Utility Model Application Publication No. 55-133600, electricity is stored in a capacitor from a small-capacity commercial power source through a charging resistor and a rectifier, and there is a limit to the capacitor's capacity from the viewpoint of capacitor volume and safety. The amount of electricity that can be generated and stored is limited, and the amount of X-rays that can be generated with one charge is also limited.

On the other hand, X-ray generators can provide adequate power for at least daytime imaging and fluoroscopy, and are not limited to commercial power sources.
Regardless of whether it is alternating current or direct current, whether it is a power generation method or whether it is large or small, such as solar cells, wind power generation, engine generators, etc.
It would be more economical if it could be connected to various power sources or use nighttime electricity. In particular, if it were possible to use a small-capacity power source regardless of whether it was AC or DC, it would be very economical, but so far no one has been able to achieve this.

The present invention has been made in view of the above-mentioned circumstances, and is capable of storing the required amount of power and for a long period of time, so that a small-capacity power source can be used.
Moreover, it is an object of the present invention to provide a transformer X-ray generator that can use either AC or DC power sources and is extremely economical during installation and operation.

[Means for solving problems]

The above purpose is to connect a storage battery through a charging circuit that is connected to a small capacity (not necessarily small capacity) AC power supply or DC power supply including a commercial power supply, and to connect the storage battery's DC power to an inverter, etc. This is achieved by generating AC power through a circuit that converts DC to AC and applying it to the main transformer.

[Effect]

Since the charging circuit outputs direct current regardless of the type of AC or direct current of the connected ffi source, it is possible to use either an alternating current or direct current power source. The DC output of this charging circuit is stored not by a capacitor but by a storage battery. Therefore, by appropriately selecting the capacity of the storage battery, it is possible to store the required amount of electricity not only in a short time but also for a long time. Therefore, it is also possible to use a small capacity power source, and the above purpose is achieved. 6 [Example] The present invention will be described in detail below with reference to one drawing. FIG. 1 is a circuit diagram showing an embodiment of a transformer type X-ray generator according to the present invention, and numeral 1 in the figure represents a power supply.

The second power supply 1 is a power supply equipment with a capacity sufficiently smaller than the transformer 2X@power supply equipment for high voltage equipment specified in JIS Z4702, such as wind power generation and engine power generation.

It consists of solar cells, etc., or uses nighttime electricity, and it does not matter whether it is AC or DC.

2 is a charging circuit that outputs DC power regardless of the type of AC or DC power source 1, and converts the power supplied from the given AC or DC power source 2 into a DC voltage suitable for charging the storage battery 3;
Make it into a current. This charging circuit 2 emits X-rays, a stop signal 9
As a result, it operates and charges the storage battery 3 while X-rays are not being generated. The storage battery 3 is normally charged with the power necessary for generating X-rays relatively slowly from the small-capacity power source 1, and if it is capable of rapid deep discharge, the storage battery 3 is
It may be an i-Cd battery, a lead battery, or some other battery. Practically speaking, a lead battery is economical, and its capacity is selected in consideration of the device output, frequency of use, etc.

4 is an inverter circuit that converts the DC power stored in the storage battery 3 into AC power, and a thyristor inverter, a transistor inverter, or the like is used.

This inverter circuit 4 includes the XI! Radiation 1 signal and stop signal are input, and this signal 9 drives and stops the inverter circuit 4 to control the emission and stop of X-rays.

The output of the inverter circuit 4 is applied to the primary side of the main transformer 6 via an autotransformer 5 for setting tube voltage.

The main transformer 6 has a voltage (low voltage) applied to its negative side.
is applied to the X-ray tube 8 via the high-voltage rectifier 7 and boosted to a high voltage necessary to generate X-rays.

FIG. 2 is a circuit diagram showing a specific example of the charging circuit 2, and 10 in the figure is a stop signal among the signals 9.

As a result, the contact 11 is closed when the X-rays are stopped, and the storage battery 3 is closed.
Make it rechargeable. The reason why this contact 11 is opened during X-ray radiation is to electrically block the influence of X-ray radiation from acting on the power supply 1 side. 12 is a rectifier, 13
is the charging voltage and the storage battery 3 according to the signal from the current control circuit 14.
charging pressure.

This is a control element that optimally controls the charging current for each battery 3, and here the case where a transistor is used is shown.

In this example, contact 11 is set when X-rays are stopped.

However, a timer (not shown) is set to close this contact 11 only at night so that nighttime power is used.
It is also possible to control by

As is well known, the time during which X-rays are radiated in an X-ray generator is very short compared to the time during which the power source 1 is connected to the device.

In the X-ray generator of the present invention configured as described above.

Since the large amount of power at the moment of emitting X-rays can be stored during a long period of time when X-rays are not being emitted, the degree of charging per unit time can be extremely small, and as a result, the capacity can be reduced. Transformer type xi even for small power supply equipment
The generator can now be used.

〔Effect of the invention〕

According to the present invention, when using the device, it is possible to generate M electric power over a sufficiently long period of time, so the power supply equipment for the device can have a smaller capacity than that specified in JIS Z4702, and the Since power can be supplied from the N battery, it is possible to construct a transformer-type X-ray generator with a large output, making it extremely economical to install and operate the X-ray generator. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the device of the present invention, and FIG.
The figure is a circuit diagram showing a specific example of the charging circuit in FIG. 1. 1...Power supply, 2...Charging circuit, 3...Storage battery, 4
...Inverter circuit, 6...Main transformer, 8...X
wire tube.

Claims (1)

[Claims] 1.Regardless of the type of AC or DC power source connected,
It is characterized by comprising a charging circuit that outputs DC power, a storage battery that is charged by the charging circuit, and a DC/AC conversion circuit that converts the DC output from the storage battery into AC and outputs it to the main transformer. A transformer type X-ray generator.