CN209627777U - A kind of filament current control circuit - Google Patents
A kind of filament current control circuit Download PDFInfo
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- CN209627777U CN209627777U CN201822181789.1U CN201822181789U CN209627777U CN 209627777 U CN209627777 U CN 209627777U CN 201822181789 U CN201822181789 U CN 201822181789U CN 209627777 U CN209627777 U CN 209627777U
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Abstract
The utility model belongs to technical field of circuit control, in particular a kind of filament current control circuit, including control circuit, pulse-width modulation circuit, driving circuit, inverter circuit, sample circuit and feed circuit, the control circuit is electrically connected with pulse-width modulation circuit control terminal, the pulse-width modulation circuit output end is electrically connected with driving circuit control terminal, the driving circuit output end is electrically connected with inverter circuit control terminal, the sample circuit input terminal is electrically connected with inverter circuit output end, for acquiring the current value of inverter circuit output, the feed circuit input terminal is electrically connected with sample circuit output end, the sample circuit output end and feedback circuit output are electrically connected with pulse-width modulation circuit, the sample circuit and the electric signal of feed circuit output input to pulse-width modulation circuit as feedback signal.The utility model is easy to use, cheap, and teaching unit laboratory is suitble to use.
Description
Technical field
The utility model belongs to technical field of circuit control, and in particular to a kind of filament current control circuit.
Background technique
Medical inspection diagnosis is generated with X-ray by X-ray tube, and the condition that X-ray tube generates x-ray has: the 1. charge of high-speed motion；
2. receiving the anode target surface of the charge bombardment of high-speed motion；3. the environment of high vacuum.
Relevant medical check equipment include DR, digital GI, CT, DSA, mobile DR, C arm, tooth piece machine, mammography machine,
Radiotherapy simulative generator etc., overall view entirety x-ray checks equipment it is found that conventional control method is the tube voltage by controlling X-ray tube
Numerical value come control generate x-ray matter；Tube current and the time for exposure of X-ray tube are controlled to control the amount for generating x-ray；To reach
According to the purpose of the intensity of different demands on examination control x-ray.
The device of operating voltage needed for will usually X-ray tube be controlled in the industry is known as x-ray device, and wherein controls pipe electricity
The circuit of pressure and tube current is referred to as high-voltage control circuit and filament heating control circuit.
It is multi-party because equipment price of complete machine is expensive, eliminates that the period is short, maintenance is at high cost, environmental requirement is high, ray risk is big etc.
All devices, are equipped with that the complete cost for teaching unit is huge to be reached by the factor in face, are made a general survey of all medical treatment in the whole nation and are set
In standby maintenance class institute, also only Shanghai health Practical training equipment facility is most strong, but can not accomplish it is exhaustive, so produce
The high-voltage generator circuit of general character in all devices split the thinking of reconstruction.
Utility model content
To solve the problems mentioned above in the background art.The utility model provides a kind of filament current control circuit,
With cheap, structure is simple, at low cost, the low feature of output voltage.
To achieve the above object, the utility model provides the following technical solutions: a kind of filament current control circuit, including control
Circuit, pulse-width modulation circuit, driving circuit, inverter circuit, sample circuit and feed circuit processed, the control circuit output end with
Pulse-width modulation circuit control terminal is electrically connected, and the pulse-width modulation circuit output end is electrically connected with driving circuit control terminal, the drive
Dynamic circuit output end is electrically connected with inverter circuit control terminal, and the sample circuit input terminal is electrically connected with inverter circuit output end,
For acquiring the current value of inverter circuit output, the feed circuit input terminal is electrically connected with sample circuit output end, described to adopt
Sample circuit output end and feedback circuit output are electrically connected with pulse-width modulation circuit, the sample circuit and feed circuit output
Electric signal input to pulse-width modulation circuit as feedback signal；
The current value of alternating current of the control circuit to set inverter circuit output, the pulse-width modulation circuit pass through
Direct current is become alternating current by control driving circuit control inverter circuit, and the feed circuit is to monitor inverter circuit output
Whether current value is more than limit value.
Preferably, the driving circuit includes the first photoelectric coupled circuit, the second photoelectric coupled circuit, the first driving circuit, the second drive
Dynamic circuit, third driving circuit and the 4th driving circuit, first driving circuit and the second driving circuit control terminal and first
Photoelectric coupled circuit output end is electrically connected, and the third driving circuit and the 4th drives circuit control end and the second photoelectric coupled circuit output end
It is electrically connected, first photoelectric coupled circuit and the second photoelectric coupled circuit input terminal are connected with pulse-width modulation circuit output end.
Preferably, the inverter circuit includes four field-effect tube, first driving circuit, the second driving circuit, the
Three driving circuits and the 4th driving circuit output end are electrically connected with the pole four field-effect tube G respectively, to control four respectively
The on-off of a field-effect tube.
Preferably, the sample circuit includes current transformer circuit and conversion circuit, and the current transformer circuit is used
To acquire the electric current of inverter circuit output, the current transformer circuit output end is connected with conversion circuit input terminal, and described turn
Circuit output end is changed to be connected with pulse-width modulation circuit.
Preferably, the feed circuit is voltage comparator circuit, and input terminal is connected with conversion circuit output end.
Compared with prior art, the utility model has the beneficial effects that it is easy to use, it is cheap, it is suitble to teaching unit
Laboratory uses, and is provided with feed circuit, when circuit is more than limit value, cutting power supply.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the principles of the present invention figure；
Fig. 2 is the schematic diagram of the utility model driving circuit；
Fig. 3 is the total circuit diagram of the utility model；
Fig. 4 is the utility model control circuit circuit diagram；
Fig. 5 is the utility model pulse-width modulation circuit circuit diagram；
Fig. 6 is the utility model driving circuit circuit diagram；
Fig. 7 is the utility model inverter circuit circuit diagram；
Fig. 8 is the utility model sample circuit circuit diagram；
Fig. 9 is the utility model feed circuit circuit diagram.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-9 is please referred to, the utility model is the following technical schemes are provided: a kind of filament current control circuit, including control
Circuit, pulse-width modulation circuit, driving circuit, inverter circuit, sample circuit and feed circuit, control circuit output end and pulsewidth tune
Circuit control end processed is electrically connected, and pulse-width modulation circuit output end is electrically connected with driving circuit control terminal, driving circuit output end with
Inverter circuit control terminal is electrically connected, and sample circuit input terminal is electrically connected with inverter circuit output end, defeated for acquiring inverter circuit
Current value out, feed circuit input terminal are electrically connected with sample circuit output end, sample circuit output end and feed circuit output
End is electrically connected with pulse-width modulation circuit, and the electric signal of sample circuit and feed circuit output inputs to pulsewidth as feedback signal
Modulation circuit.
Fig. 4 shows the circuit diagram in addition to control circuit.The electric current of alternating current of the control circuit to set inverter circuit output
Value.
Fig. 5 shows the circuit diagram of pulse-width modulation circuit, and the control chip model used is TL594.
Fig. 6 shows the circuit diagram of driving circuit.Driving circuit includes the first photoelectric coupled circuit, the second photoelectric coupled circuit, first
Driving circuit, the second driving circuit, third driving circuit and the 4th driving circuit, the first driving circuit and the second driving circuit control
End processed is electrically connected with the first photoelectric coupled circuit output end, and third driving circuit and the 4th drives circuit control end and the second photoelectric coupled circuit
Output end is electrically connected, and the first photoelectric coupled circuit and the second photoelectric coupled circuit input terminal are connected with pulse-width modulation circuit output end, and first
Photoelectric coupled circuit and the second photoelectric coupled circuit play the role of insulation blocking, and pulse-width modulation circuit passes through the first photoelectric coupled circuit control the
One drive circuit and the second driving circuit control third driving circuit and the 4th driving circuit by the second photoelectric coupled circuit.
Fig. 7 shows inverter circuit circuit diagram.Inverter circuit includes four field-effect tube, and the first driving circuit, second drive
Dynamic circuit, third driving circuit and the 4th driving circuit output end are electrically connected with four poles field-effect tube G respectively, to control respectively
Make the on-off of four field-effect tube.
Fig. 8 shows sample circuit circuit diagram.Sample circuit includes current transformer circuit and conversion circuit, Current Mutual Inductance
High current is converted into a certain proportion of low current, current transformer electricity by electric current of the device circuit to acquire inverter circuit output
Road output end is connected with conversion circuit input terminal, and the low current that current transformer acquires is converted into equivalent electricity by conversion circuit
Pressure, conversion circuit output end are connected with pulse-width modulation circuit, and pulse-width modulation circuit is carried out according to the voltage that conversion circuit exports
Control.
Fig. 9 shows feed circuit circuit diagram.Feed circuit is voltage comparator circuit, and input terminal and conversion circuit export
End is connected, and effect is whether the electric current for monitoring inverter circuit output is more than safety value, when the electric current mistake of inverter circuit output
When big, feed circuit can issue signal to pulse-width modulation circuit, and pulse-width modulation circuit cuts off the output of circuital current.
Finally, it should be noted that the utility model circuit used is electronic component or integrated chip, do not involve
Programmed algorithm, the control process described when introducing content the process merely for convenience for illustrating circuit operation.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, although ginseng
The utility model is described in detail according to previous embodiment, it for those skilled in the art, still can be with
It modifies the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.It is all
Within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in practical
Within novel protection scope.
Claims (5)
1. a kind of filament current control circuit, including control circuit, pulse-width modulation circuit, driving circuit, inverter circuit, sampling electricity
Road and feed circuit, which is characterized in that the control circuit output end is electrically connected with pulse-width modulation circuit control terminal, the pulsewidth
Modulation circuit output end is electrically connected with driving circuit control terminal, the driving circuit output end and inverter circuit control terminal electricity phase
Even, the sample circuit input terminal is electrically connected with inverter circuit output end, described for acquiring the current value of inverter circuit output
Feed circuit input terminal is electrically connected with sample circuit output end, and the sample circuit output end and feedback circuit output are and arteries and veins
Wide modulation circuit is electrically connected, and the electric signal of the sample circuit and feed circuit output inputs to pulsewidth modulation as feedback signal
Circuit；
The current value of alternating current of the control circuit to set inverter circuit output, the pulse-width modulation circuit pass through control
Driving circuit, which controls inverter circuit, becomes alternating current, electric current of the feed circuit to monitor inverter circuit output for direct current
Whether value is more than limit value.
2. a kind of filament current control circuit according to claim 1, it is characterised in that: the driving circuit includes first
Photoelectric coupled circuit, the second photoelectric coupled circuit, the first driving circuit, the second driving circuit, third driving circuit and the 4th driving circuit, institute
It states the first driving circuit and the second driving circuit control terminal to be electrically connected with the first photoelectric coupled circuit output end, the third driving circuit
It is electrically connected with the 4th driving circuit control end with the second photoelectric coupled circuit output end, first photoelectric coupled circuit and the second photoelectric coupled circuit
Input terminal is connected with pulse-width modulation circuit output end.
3. a kind of filament current control circuit according to claim 2, it is characterised in that: the inverter circuit includes four
Field-effect tube, first driving circuit, the second driving circuit, third driving circuit and the 4th driving circuit output end respectively with
The pole four field-effect tube G is electrically connected, to control the on-off of four field-effect tube respectively.
4. a kind of filament current control circuit according to claim 1, it is characterised in that: the sample circuit includes electric current
Transformer circuit and conversion circuit, electric current of the current transformer circuit to acquire inverter circuit output, the electric current are mutual
Sensor circuit output end is connected with conversion circuit input terminal, and the conversion circuit output end is connected with pulse-width modulation circuit.
5. a kind of filament current control circuit according to claim 1, it is characterised in that: the feed circuit is voltage ratio
Compared with circuit, input terminal is connected with conversion circuit output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822181789.1U CN209627777U (en) | 2018-12-25 | 2018-12-25 | A kind of filament current control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822181789.1U CN209627777U (en) | 2018-12-25 | 2018-12-25 | A kind of filament current control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209627777U true CN209627777U (en) | 2019-11-12 |
Family
ID=68446746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822181789.1U Expired - Fee Related CN209627777U (en) | 2018-12-25 | 2018-12-25 | A kind of filament current control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209627777U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050454A (en) * | 2019-12-27 | 2020-04-21 | 上海联影医疗科技有限公司 | Filament power supply and radiotherapy equipment |
| CN111212491A (en) * | 2020-02-20 | 2020-05-29 | 烟台长青微波科技有限公司 | Filament current control device of variable-frequency microwave generating source |
-
2018
- 2018-12-25 CN CN201822181789.1U patent/CN209627777U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050454A (en) * | 2019-12-27 | 2020-04-21 | 上海联影医疗科技有限公司 | Filament power supply and radiotherapy equipment |
| CN111212491A (en) * | 2020-02-20 | 2020-05-29 | 烟台长青微波科技有限公司 | Filament current control device of variable-frequency microwave generating source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191112 Termination date: 20201225 |