CN217693759U - High-pressure ray machine ray tube filament drive circuit - Google Patents
High-pressure ray machine ray tube filament drive circuit Download PDFInfo
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- CN217693759U CN217693759U CN202221578782.3U CN202221578782U CN217693759U CN 217693759 U CN217693759 U CN 217693759U CN 202221578782 U CN202221578782 U CN 202221578782U CN 217693759 U CN217693759 U CN 217693759U
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- mos transistor
- mutual inductance
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Abstract
The utility model belongs to the technical field of ray machine, and provides a filament driving circuit of a high-voltage ray machine ray tube, which comprises two driving chips, an transformer branch and a filament, wherein the driving chips are used for driving the filament; the mutual inductance transformer branch comprises a plurality of mutual inductance transformers which are connected in series; the two driving chips are respectively connected to two ends of a mutual inductance transformer branch; the number of mutual transformers is related to the voltage of the ray machine; the filament and the mutual inductance transformer branch are connected in series. The application provides a pair of high-pressure ray machine ray tube filament drive circuit, the mode drive voltage direct action who directly pushes away through mutual inductance transformer branch road has stabilized the drive current of ray tube filament, has improved drive efficiency.
Description
Technical Field
The utility model relates to an ray machine technical field, concretely relates to high-pressure ray machine ray tube filament drive circuit.
Background
The existing high-voltage ray machine drives a high-voltage ray tube filament in a main and auxiliary coil coupling mode, a primary side driving circuit at a voltage position is isolated from a ray tube filament circuit at a high-voltage side in the driving mode, energy output efficiency is not high directly, and driving waveforms are easily influenced because a primary side low-voltage side exciting coil is tightly attached to the wall of the ray machine.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model provides a high-pressure ray machine ray tube filament drive circuit to solve current high-pressure ray machine and pass through the mode drive filament of major-minor coil coupling, cause energy transmission's problem not high in efficiency.
The utility model provides a pair of high-pressure ray machine ray tube filament drive circuit, include:
two driving chips for driving the filament;
the mutual inductance transformer branch comprises a plurality of mutual inductance transformers which are connected in series; the two driving chips are respectively connected to two ends of the mutual inductance transformer branch; the number of the mutual transformers is related to the voltage of the ray machine;
and the filament is connected with the mutual inductance transformer branch in series.
According to the above technical scheme, the utility model provides a pair of high-pressure ray machine ray tube filament drive circuit, the mode drive voltage direct action that directly pushes away by the mutual inductance transformer branch road has stabilized the drive current of ray tube filament, has improved drive efficiency in the filament.
Optionally, an HO pin of the driver chip is connected to a gate of the first MOS transistor through a first resistor, a VB pin of the driver chip is connected to a VS pin of the driver chip through a first capacitor, the VS pin is further connected to a source of the first MOS transistor, a DT pin of the driver chip is connected to a COM pin through a second resistor, an LO pin is connected to a gate of the second MOS transistor through a third resistor, and a source of the first MOS transistor is connected to a drain of the second MOS transistor.
Optionally, a fourth resistor and a diode are connected between the gate and the source of each of the first MOS transistor and the second MOS transistor, and the fourth resistor and the diode are connected in parallel.
Optionally, the drain of the first MOS transistor is connected to +48V, and the source of the second MOS transistor is grounded.
Optionally, the mutual inductance transformer branch is further wrapped with a copper foil for isolating the influence of the alternating magnetic field and external interference.
Optionally, the model of the driving chip is irs21844s.
By adopting the technical scheme, the method has the following technical effects:
the utility model provides a pair of high-pressure ray machine ray tube filament drive circuit directly acts on the filament through the mode drive voltage direct action that mutual inductance transformer branch road directly pushed away, has stabilized the drive current of ray tube filament, has improved drive efficiency. Meanwhile, the mutual inductance transformer branch is wrapped by the copper foil, so that the mutual influence between the alternating magnetic field and the outside is reduced, and the stability is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic diagram of a filament driving circuit of a high-pressure ray machine ray tube according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
As shown in fig. 1, the filament driving circuit for a high-pressure ray machine ray tube provided in this embodiment includes two driving chips, a transformer branch and a filament, where the driving chips are used for driving the filament; the mutual inductance transformer branch comprises a plurality of mutual inductance transformers which are connected in series; the two driving chips are respectively connected to two ends of a mutual inductance transformer branch; the number of mutual transformers is related to the voltage of the ray machine; the filament and the mutual inductance transformer branch are connected in series.
According to the high-voltage ray machine ray tube filament driving circuit, driving voltage is directly acted on the filament in a mutual inductance transformer branch direct-push mode, driving current of the ray tube filament is stabilized, and driving efficiency is improved. In the present embodiment, since the filament driving circuit of the 275kV high-voltage ray machine tube is shown, the number of the mutual induction transformers in fig. 1 is 8, and the number of the mutual induction transformers can be adjusted in a targeted manner for different high-voltage ray machines.
As shown in fig. 1, the HO pin of the driver chip is connected to the gate of the first MOS transistor through the first resistor, the VB pin of the driver chip is connected to the VS pin through the first capacitor, the VS pin is further connected to the source of the first MOS transistor, the DT pin of the driver chip is connected to the COM pin through the second resistor, the LO pin is connected to the gate of the second MOS transistor through the third resistor, and the source of the first MOS transistor is connected to the drain of the second MOS transistor.
As shown in fig. 1, a fourth resistor and a diode are connected between the gate and the source of each of the first MOS transistor and the second MOS transistor, and the fourth resistor and the diode are connected in parallel.
As shown in FIG. 1, the drain of the first MOS transistor is connected to +48V voltage, and the source of the second MOS transistor is grounded.
In one possible embodiment, the mutual inductance transformer branch is wrapped with copper foil for isolating the influence of the alternating magnetic field and external interference. The mutual influence between the alternating magnetic field and the outside is reduced by wrapping the mutual inductance transformer branch circuits with the copper foil, and the stability is improved.
In the present embodiment, the model number of the driving chip is irs21844s.
In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included in the scope of the claims and description of the present invention.
Claims (6)
1. A filament drive circuit for a high-pressure ray machine ray tube, comprising:
two driving chips for driving the filament;
the mutual inductance transformer branch comprises a plurality of mutual inductance transformers which are connected in series; the two driving chips are respectively connected to two ends of the mutual inductance transformer branch; the number of the mutual transformers is related to the voltage of the ray machine;
and the filament is connected with the mutual inductance transformer branch in series.
2. The driving circuit according to claim 1, wherein the HO pin of the driving chip is connected to the gate of the first MOS transistor through a first resistor, the VB pin and the VS pin of the driving chip are connected to the first capacitor, the VS pin is further connected to the source of the first MOS transistor, the DT pin of the driving chip is connected to the COM pin through a second resistor, the LO pin is connected to the gate of the second MOS transistor through a third resistor, and the source of the first MOS transistor is connected to the drain of the second MOS transistor.
3. The driving circuit of claim 2, wherein a fourth resistor and a diode are connected between the gate and the source of each of the first MOS transistor and the second MOS transistor, and the fourth resistor and the diode are connected in parallel.
4. The driving circuit as claimed in claim 3, wherein the drain of the first MOS transistor is connected to +48V, and the source of the second MOS transistor is connected to ground.
5. The driving circuit of claim 1, wherein the mutual inductance transformer branch is further wrapped with copper foil for isolating the influence of the alternating magnetic field and external interference.
6. The driving circuit according to claim 1, wherein the model of the driving chip is irs21844s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221578782.3U CN217693759U (en) | 2022-06-22 | 2022-06-22 | High-pressure ray machine ray tube filament drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221578782.3U CN217693759U (en) | 2022-06-22 | 2022-06-22 | High-pressure ray machine ray tube filament drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217693759U true CN217693759U (en) | 2022-10-28 |
Family
ID=83711148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221578782.3U Active CN217693759U (en) | 2022-06-22 | 2022-06-22 | High-pressure ray machine ray tube filament drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217693759U (en) |
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2022
- 2022-06-22 CN CN202221578782.3U patent/CN217693759U/en active Active
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