CN213906555U - AC-DC compatible input power supply high-voltage generator device - Google Patents
AC-DC compatible input power supply high-voltage generator device Download PDFInfo
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- CN213906555U CN213906555U CN202023348964.5U CN202023348964U CN213906555U CN 213906555 U CN213906555 U CN 213906555U CN 202023348964 U CN202023348964 U CN 202023348964U CN 213906555 U CN213906555 U CN 213906555U
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Abstract
The utility model provides a compatible input power supply high voltage generator device of alternating current-direct current, include: the power supply circuit comprises a main power supply, a soft start circuit component, a rectifying circuit component, a high-voltage multiplying circuit component, an inverter circuit component, a detection discharge circuit component and a control circuit component; the main power supply is connected with the soft start circuit part; the soft start circuit part is connected with the rectifying circuit part; the high-voltage multiplier circuit component is connected with the inverter circuit component; the detection discharge circuit component is respectively connected with the rectifying circuit component and the inverter circuit component; the detection discharge circuit part is connected with the control circuit part. The utility model discloses an adoption draws forth high frequency high voltage generator main power supply circuit three-phase rectifier bridge direct current generating line, has solved its direct current capacity that brings with the reduction that the direct current lets in rectifier bridge switch-on diode and is not enough to support the problem of the high-power exposure of rear end.
Description
Technical Field
The utility model relates to a power supply high voltage generator technical field specifically relates to an alternating current-direct current compatible input power supply high voltage generator device.
Background
The prior art needs a high voltage generator device with ac/dc compatible input power supply.
Patent document CN111082681A discloses a high-voltage generator rectifying device, a high-voltage generator, and a medical apparatus. The high voltage generator rectifying device comprises: a rectification circuit and a voltage regulation circuit; the input end of the rectification circuit is connected with a three-phase power supply, and the direct-current voltage output by the rectification circuit is slowly increased until the direct-current voltage is stable by adjusting the conduction angle of the rectification circuit; the input end of the voltage regulating circuit is connected with the three-phase power supply, and the output end of the voltage regulating circuit is connected with the output end of the rectifying circuit and used for regulating the direct-current voltage output by the rectifying circuit. The slow rise of direct current voltage is realized by adjusting the conduction angle of the rectifying circuit, namely the soft start function is realized, and the voltage input into the inverter is adjusted by arranging the voltage regulating circuit, so that the loss of the inverter is reduced. There is still room for improvement in structural and technical performance.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing an alternating current-direct current compatible input power supply high voltage generator device.
According to the utility model provides a pair of compatible input power supply high voltage generator device of alternating current-direct current, include: the power supply circuit comprises a main power supply, a soft start circuit component, a rectifying circuit component, a high-voltage multiplying circuit component, an inverter circuit component, a detection discharge circuit component and a control circuit component; the main power supply is connected with the soft start circuit part; the soft start circuit part is connected with the rectifying circuit part; the high-voltage multiplier circuit component is connected with the inverter circuit component; the detection discharge circuit component is respectively connected with the rectifying circuit component and the inverter circuit component; the detection discharge circuit part is connected with the control circuit part.
Preferably, the method further comprises the following steps: an auxiliary power supply;
the control circuit part is connected with an auxiliary power supply.
Preferably, the soft start circuit part includes: the soft start circuit comprises a soft start current limiting resistor, an inductor and a first switch;
the soft start current limiting resistor is connected with the inductor.
Preferably, the rectifier circuit part includes: one or more uncontrolled devices.
Preferably, the rectifier circuit part includes: six groups of uncontrolled devices;
the six groups of uncontrolled devices comprise: three upper arm devices, three lower arm devices;
the three upper arm devices form a common negative group;
the three lower arm devices constitute a common anode group.
Preferably, the discharge detection circuit part includes: a detection circuit and a release circuit;
the detection circuit is connected with the reproduction circuit.
Preferably, the inverter circuit component employs a series resonance type inverter circuit.
Preferably, the high voltage multiplier circuit component employs a single-phase full bridge rectifier circuit.
Preferably, the high-voltage multiplier circuit component adopts two sets of high-voltage transformers.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model can combine the main power input terminals together only by changing the software of the input interface circuit and the control circuit, and the control circuit can freely switch the power supply circuit for compatible AC/DC input, and the rectification circuit, the inverter circuit and the high voltage multiplication circuit in the main circuit of the high voltage generator structure do not need to be changed;
2. the utility model discloses limit soft start with the preliminary filling in the high voltage generator main power circuit, auxiliary power supply switching power among three-phase rectifier bridge part and the auxiliary circuit carries out modification and design adjustment on the circuit for compatible main power and auxiliary power alternating current-direct current input power supply simultaneously, according to the use scene of different application products, mountable in vehicular, portable self take the internal power supply medical image equipment of energy storage module, also can install in the conventional fixed medical image equipment that does not take the energy storage module, directly rely on the industrial network power supply to supply power simultaneously;
3. in the technical scheme of the utility model, when the medical imaging equipment is fixed, the power is directly supplied by the industrial network power supply; when the medical imaging equipment is vehicle-mounted or mobile, the power supply energy storage module, such as a lithium battery, a lithium ion capacitor and a super capacitor, is connected in series and parallel to form an energy storage module with corresponding voltage capacity, and is directly used for supplying power to a main power supply and an auxiliary power supply of a high-voltage generator, so that the application range of the medical imaging equipment with high power and continuously operated by intermittent loading in the future such as vehicle-mounted or mobile CT, PET-CT, DR and the like is expanded;
4. the utility model leads out the three-phase rectifier bridge direct current bus of the main power circuit of the high-frequency high-voltage generator, thereby solving the problem that the current capacity brought by the reduction of directly leading into the rectifier bridge conduction diode is not enough to support the high-power exposure of the rear end;
5. the utility model, by adding the DC soft start protection circuit and detecting the discharge circuit, solves the problem of the suppression of surge current when the DC is directly connected into the DC power supply;
6. the utility model discloses an adopt the switching power supply of broad scope AC/DC input, enlarge its auxiliary power supply's input range, solved high voltage generator at the application range of energy storage formula internal power supply equipment such as CT, PET-CT, DR, reach high voltage generator and can concurrently use in fixed, vehicular, portable medical imaging equipment field simultaneously, reduce the conversion dependence to the power condition.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is the structural frame diagram of the ac/dc compatible input high voltage generator of the present invention.
Fig. 2 is a schematic diagram of a main power circuit of an ac/dc compatible input high voltage generator according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an auxiliary power circuit of an ac/dc compatible input high voltage generator according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
A high-voltage generator device of AC/DC compatible input power supply adopts a three-phase rectifier bridge DC bus of a main power circuit of a high-frequency high-voltage generator to be led out, a DC soft start protection circuit is added, a detection discharge circuit realizes the compatible direct access of a DC power supply, and the problem that the current capacity caused by the reduction of a direct access rectifier bridge conduction diode of the DC power supply is not enough to support the high-power exposure of the rear end is avoided; the input range of the auxiliary power supply is expanded by matching with a switching power supply with wide range AC/DC input, so that the application range of the high-voltage generator in energy storage type internal power supply equipment such as CT, PET-CT, DR and the like is expanded, the high-voltage generator can be simultaneously used in the fields of fixed type, vehicle-mounted type and mobile medical imaging equipment, and the conversion loss and the dependence on power supply conditions are reduced.
As shown in fig. 1, the structure of the ac-dc compatible input high voltage generator mainly comprises a main power circuit and an auxiliary circuit, wherein the main power circuit mainly comprises: the device comprises a soft start circuit, a rectifying circuit, a detection discharge circuit, an inverter circuit and a high-voltage multiplying circuit; the soft start circuit is connected with the rectifying circuit, the rectifying circuit is connected with the detection discharge circuit, the detection discharge circuit is connected with the inverter circuit, and the inverter circuit is connected with the high-voltage multiplication circuit; the auxiliary power supply circuit mainly comprises an auxiliary power supply and a control circuit; the auxiliary power supply is connected with the control circuit, and the control circuit is connected with the soft start circuit and the detection discharge circuit;
as in fig. 2, the soft start circuit: before a main power supply loop of the high-voltage generator is electrified, a smoothing capacitor of a rectifier circuit needs to be charged, and surge current during charging is limited through a soft start protection circuit; when the main power supply circuit inputs power supply type alternating current, the alternating current is usually 3phase 400VAC + 10%/-20% 50-60Hz in a practical case, and at the moment, the line voltage firstly attracts a contactor K2 through leading, and is supplied to a rectifying circuit through soft-start current limiting resistors R1, R2 and R3 for charging a rear-end direct current bus smoothing capacitor; then, whether the direct current bus capacitor is normally charged or not is judged through the detection of the direct current bus gentle capacitor pre-charging detection circuit, and the voltage of a main loop line is connected to the rectifying circuit through attracting a main power supply loop contactor K1; when the type of the input power of the main power circuit is direct current, the calculated value is set according to high-voltage generators of different specifications in a practical case, the calculated value is generally about 450-622 vDC range, at the moment, a contactor K4 is attracted by line voltage ratio, and the current is supplied to a rectifying circuit through soft start current limiting resistors R3 and R4 and is used for charging a rear-end direct current bus smoothing capacitor; similarly, whether the direct current bus capacitor is normally charged or not is judged through the detection of the direct current bus flat capacitor pre-charging detection circuit, and then the voltage of the main loop line is connected to the inverter circuit by attracting the main loop contactor K3;
the rectifying circuit comprises six groups of uncontrolled devices, namely upper arm devices VD1, VD3 and VD5, which form a common negative group; the lower arm devices VD4, VD5 and VD6 form a common anode group; when the regular AC 3phase 400vAC of the power type is input, the AC is rectified into DC
U1 is used for a back-end inverter circuit; when the incoming power type direct current is input
When U1, the current does not pass through the loop, so as to ensure that the current capacity caused by the reduction of the direct conduction diode through the rectifier bridge is not enough to support the high-power exposure of the rear end, the voltage endurance of the components of the pre-charging loop is prolonged, and the electromagnetic compatibility problem caused by different alternating current and direct current types is solved;
a discharge detection circuit: the detection circuit is used for detecting the charging state of the direct current bus smoothing capacitor at the moment of electrification; the discharge circuit is used for quickly releasing the voltage stored in the direct current bus capacitor through R13, R14, R15 and R16 after the system is powered off;
an inverter circuit: the series resonance type inverter circuit consists of VT1, VT2, VT3 and VT4, freewheeling is carried out through feedback diodes D1, D2, D3 and D4, and the frequency of trigger pulses of the power switching tube is adjusted to adjust the output power for controlling the input and exposure time of the power;
the high-voltage multiplying circuit is usually a single-phase full-bridge rectifying circuit, two sets of high-voltage transformers can be used, the anode and the cathode are respectively provided with one set of circuit, and direct-current voltages after rectification are connected in series and used for reducing the voltage withstanding requirement of high-voltage components;
as shown in fig. 2, an ac/dc compatible input power supply high voltage generator device includes:
the soft start circuit: before a main power supply loop of the high-voltage generator is electrified, a smoothing capacitor of a rectifier circuit needs to be charged, and surge current during charging is limited through a soft start protection circuit; when the main power supply circuit inputs power supply type alternating current, the alternating current is usually 3Phase 400VAC + 10%/-20% 50-60Hz in a practical case, and at the moment, the line voltage is supplied to a rectifying circuit through a leading attraction contactor K2 and soft starting current limiting resistors R1, R2 and R3 for charging a rear-end direct current bus smoothing capacitor; then, whether the direct current bus capacitor is normally charged or not is judged through the detection of the direct current bus gentle capacitor pre-charging detection circuit, and the voltage of a main loop line is connected to the rectifying circuit through attracting a main power supply loop contactor K1; when the type of the input power of the main power circuit is direct current, the calculated value is set according to high-voltage generators of different specifications in a practical case, the calculated value is generally about 450-622 vDC range, at the moment, a contactor K4 is attracted by line voltage ratio, and the current is supplied to a rectifying circuit through soft start current limiting resistors R3 and R4 and is used for charging a rear-end direct current bus smoothing capacitor; similarly, whether the direct current bus capacitor is normally charged or not is judged through the detection of the direct current bus flat capacitor pre-charging detection circuit, and then the voltage of the main loop line is connected to the inverter circuit by attracting the main loop contactor K3;
the rectifying circuit comprises six groups of uncontrolled devices, namely upper arm devices VD1, VD3 and VD5, which form a common negative group; the lower arm devices VD4, VD5 and VD6 form a common anode group; when the input power type conventional alternating current 3Phase 400vAC is input, the alternating current is rectified into direct current
U1 is used for a back-end inverter circuit; when the incoming power type direct current is input
When U1, the current does not pass through the loop, so as to ensure that the current capacity caused by the reduction of the direct conduction diode through the rectifier bridge is not enough to support the high-power exposure of the rear end, the voltage endurance of the components of the pre-charging loop is prolonged, and the electromagnetic compatibility problem caused by different alternating current and direct current types is solved;
a discharge detection circuit: the detection circuit is used for detecting the charging state of the direct current bus smoothing capacitor at the moment of electrification; the discharge circuit is used for quickly releasing the voltage stored in the direct current bus capacitor through R13, R14, R15 and R16 after the system is powered off;
an inverter circuit: the series resonance type inverter circuit consists of VT1, VT2, VT3 and VT4, freewheeling is carried out through feedback diodes D1, D2, D3 and D4, and the frequency of trigger pulses of the power switching tube is adjusted to adjust the output power for controlling the input and exposure time of the power;
the high-voltage multiplying circuit is usually a single-phase full-bridge rectifying circuit, two sets of high-voltage transformers can be used, the anode and the cathode are respectively provided with one set of circuit, and direct-current voltages after rectification are connected in series and used for reducing the voltage withstanding requirement of high-voltage components;
the utility model can combine the main power input terminals together only by changing the software of the input interface circuit and the control circuit, and the control circuit can freely switch the power supply circuit for compatible AC/DC input, and the rectification circuit, the inverter circuit and the high voltage multiplication circuit in the main circuit of the high voltage generator structure do not need to be changed;
referring to fig. 3, the ac/dc compatible input high voltage generator auxiliary power circuit includes an auxiliary power supply and a control circuit, wherein the conventional high voltage generator auxiliary power supply is usually converted from a switching power supply via ac to a required dc for supplying power to the internal high voltage generator control board, and the input is typically Single Phase 230VAC + 10%/-20% 50-60 Hz. The internal structure of the switching power supply generally firstly passes through the lightning protection unit to the electromagnetic interference filter circuit, obtains clean direct current through the single-phase rectifier circuit and the filter circuit, finally passes through the power conversion circuit and the further rectification filter circuit, and then outputs the required low-voltage direct current; the auxiliary circuit comprises an input overvoltage and undervoltage protection circuit, a power factor correction unit, a controller, a voltage stabilizing loop circuit, an output current limiting overvoltage protection circuit, an output short circuit protection circuit and the like. The utility model discloses the point is good bad to the input unit who adopts switching power supply, under the ideal condition, when carrying out bridge rectifier to the alternating current and turning into the direct current, neglect the pressure drop of diode and filter circuit's loss, the direct current power supply that the conversion obtained is the root number 2 times of alternating current virtual value, U is 1.414U promptly, for example ~ 220vAC direct full-bridge rectification electric capacity filters the direct current power supply who obtains and is 220X1.414 311vDC, because rectifier diode's pressure drop etc., output voltage in practical application can be on the low side. According to the characteristic, as long as the voltage endurance values of the diode, the capacitor resistor and the like are enough, the front-end fuse is compatible in coordination protection, the PFC power factor correction is properly adjusted, and the switching power supply can be compatible with AC/DC input power supply. In practical case, the current switch power supply can be selected from the current switch power supply on the market, and the current switch power supply is compatible with the alternating current 230vAC +/-20% input power supply and the direct current
90-265 VDC is supplied by wide-range input. The control circuit is mainly used for pre-charging and limiting the main power circuit loop after being connected with an external network power supply and quickly releasing residual charges after being disconnected with the external network power supply;
the utility model discloses in restrict soft start with the pre-charge in the high voltage generator main power supply circuit, auxiliary power supply switching power among three-phase rectifier bridge part and the auxiliary circuit carries out modification and design adjustment on the circuit, be used for compatible main power supply and auxiliary power supply alternating current-direct current input power supply simultaneously, according to the use scene of different application products, the mountable is in the vehicular, portable self takes the internal power supply medical imaging equipment of energy storage module, also can install in the fixed energy storage module that does not take of conventionality simultaneously, directly rely on in the medical imaging equipment of industrial network power supply. When the medical imaging equipment is a fixed medical imaging equipment, the power is directly supplied through an industrial network power supply; when the medical imaging equipment is vehicle-mounted or mobile, the power supply energy storage module, such as a lithium battery, a lithium ion capacitor and a super capacitor, is connected in series and parallel to form an energy storage module with corresponding voltage capacity, and is directly used for supplying power to a main power supply and an auxiliary power supply of the high-voltage generator, so that the application range of the medical imaging equipment with high power, which is loaded intermittently and continuously operated in the vehicle-mounted, mobile CT, PET-CT, DR and the like in the future, is expanded.
The utility model leads out the three-phase rectifier bridge direct current bus of the main power circuit of the high-frequency high-voltage generator, thereby solving the problem that the current capacity brought by the reduction of directly leading into the rectifier bridge conduction diode is not enough to support the high-power exposure of the rear end;
the utility model solves the problem of the suppression of surge current when the direct current power supply is directly connected by adding the direct current soft start protection circuit and detecting the discharge circuit;
the utility model discloses an adopt the switching power supply of broad scope AC/DC input, enlarge its auxiliary power supply's input range, solved high voltage generator at the application range of energy storage formula internal power supply equipment such as CT, PET-CT, DR, reach high voltage generator and can concurrently use in fixed, vehicular, portable medical imaging equipment field simultaneously, reduce the conversion dependence to the power condition.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. An ac-dc compatible input powered high voltage generator device, comprising:
the power supply circuit comprises a main power supply, a soft start circuit component, a rectifying circuit component, a high-voltage multiplying circuit component, an inverter circuit component, a detection discharge circuit component and a control circuit component;
the main power supply is connected with the soft start circuit part;
the soft start circuit part is connected with the rectifying circuit part;
the high-voltage multiplier circuit component is connected with the inverter circuit component;
the detection discharge circuit component is respectively connected with the rectifying circuit component and the inverter circuit component;
the detection discharge circuit part is connected with the control circuit part.
2. The ac-dc compatible input powered high voltage generator device of claim 1, further comprising: an auxiliary power supply;
the control circuit part is connected with an auxiliary power supply.
3. The ac-dc compatible input-powered high voltage generator device of claim 1, wherein the soft start circuit means comprises: the soft start circuit comprises a soft start current limiting resistor, an inductor and a first switch;
the soft start current limiting resistor is connected with the inductor.
4. The ac-dc compatible input powered high voltage generator device according to claim 1, wherein said rectifier circuit means comprises: one or more uncontrolled devices.
5. The ac-dc compatible input powered high voltage generator device according to claim 4, wherein said rectifier circuit means comprises: six groups of uncontrolled devices;
the six groups of uncontrolled devices comprise: three upper arm devices, three lower arm devices;
the three upper arm devices form a common negative group;
the three lower arm devices constitute a common anode group.
6. The ac-dc compatible input-powered high voltage generator device of claim 1, wherein said sense discharge circuit means comprises: a detection circuit and a release circuit;
the detection circuit is connected with the reproduction circuit.
7. The ac-dc compatible input powered high voltage generator device according to claim 1, wherein said inverter circuit means employs a series resonant type inverter circuit.
8. The ac-dc compatible input powered high voltage generator device according to claim 1, wherein said high voltage multiplier circuit means employs a single phase full bridge rectifier circuit.
9. The ac-dc compatible input powered high voltage generator device according to claim 8, wherein said high voltage multiplier circuit component employs two sets of high voltage transformers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023348964.5U CN213906555U (en) | 2020-12-31 | 2020-12-31 | AC-DC compatible input power supply high-voltage generator device |
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| CN202023348964.5U CN213906555U (en) | 2020-12-31 | 2020-12-31 | AC-DC compatible input power supply high-voltage generator device |
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| CN213906555U true CN213906555U (en) | 2021-08-06 |
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| CN202023348964.5U Active CN213906555U (en) | 2020-12-31 | 2020-12-31 | AC-DC compatible input power supply high-voltage generator device |
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