CN211239332U - Lightning-protection surge device and cone beam CT - Google Patents
Lightning-protection surge device and cone beam CT Download PDFInfo
- Publication number
- CN211239332U CN211239332U CN201922410326.2U CN201922410326U CN211239332U CN 211239332 U CN211239332 U CN 211239332U CN 201922410326 U CN201922410326 U CN 201922410326U CN 211239332 U CN211239332 U CN 211239332U
- Authority
- CN
- China
- Prior art keywords
- voltage
- lightning
- common mode
- surge
- protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model provides a lightning surge protection device, which comprises a first lightning surge protection circuit, wherein the first lightning surge protection circuit comprises a high-voltage clamping element for clamping the voltage to a fixed voltage value; the high-voltage protection element is connected with the high-voltage clamping element in series, when the voltage at two ends of the high-voltage protection element is higher than a protection regulation value, a short circuit phenomenon can occur inside the high-voltage protection element, and the high-voltage protection element absorbs the over-voltage so as to rapidly transmit lightning stroke or surge energy to the ground when lightning stroke induction or operation overvoltage occurs; the second lightning surge protection circuit comprises a common mode choke coil for reducing common mode interference; a semiconductor discharge tube for rapidly discharging a high voltage generated when the common mode choke coil is induced by a lightning stroke or operates over-voltage; the third lightning stroke prevention surge circuit comprises a Y capacitor and is used for inhibiting common mode interference; the copper foil is used for point discharge and is arranged at two ends of the Y capacitor so as to rapidly discharge high voltage generated by the Y capacitor due to lightning stroke induction or operation overvoltage.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a cone beam CT that contains surge circuit is hit in lightning protection.
Background
Cone Beam CT (CBCT) is the most promising and practical device in the oral cavity and skull imaging devices today, and its application revolutionized diagnosis and treatment in the oral and skull clinical field.
Because the load power of the cone beam CT is very high during normal operation, some load powers are as high as 2kw, and the inductance of the filter is relatively high, a very high operation overvoltage is often generated when a lightning strike is encountered or a power switch is turned on or off, which affects the safe operation of the equipment, and may damage the equipment circuit and its components in a serious case. In order to avoid lightning strikes, surge voltages, etc., from destroying sensitive automation equipment, it is necessary to short-circuit the conductors, in which such surge voltages occur, to the potential equalization system (i.e., to ground) in a very short time.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pair of circuit and toper beam CT that prevent thunderbolt surge has solved toper beam CT and has produced very high operation overvoltage meeting with the thunderbolt or when switch on and switch off, influences equipment safety work, damages the problem of equipment circuit and part for the conductor that produces this kind of surge voltage is with the balanced system short circuit of electric potential (introduce the earth promptly) in very short time.
In order to achieve the above object, the technical solution of the present invention is specifically realized as follows:
an aspect of the utility model provides a surge device is hit in lightning protection, strike surge circuit including first lightning protection, surge circuit is hit in first lightning protection includes high-pressure clamping element and high-pressure protection component. The first end of the high-voltage clamping element is connected with the L end of a power supply and is used for clamping the voltage to a fixed voltage value; the high-voltage protection element is connected with the high-voltage clamping element in series, the first end of the high-voltage protection element is connected with the N end of the power supply, and when the voltage at the two ends of the high-voltage protection element is higher than a protection limit value, the high-voltage protection element is internally short-circuited and absorbs overhigh voltage.
Further, the high-voltage clamping element is a piezoresistor, and the high-voltage protection element is a discharge tube.
Further, in the first lightning protection surge circuit, the high-voltage clamping element is a first piezoresistor R1, the high-voltage protection element is a first discharge tube D3, the first lightning protection surge circuit further includes a second piezoresistor R2, a third piezoresistor R3 and a second discharge tube D4, the second piezoresistor R2 and the third piezoresistor R3 are connected in series, the first end of the second piezoresistor R2 is connected to the power supply L terminal, the first end of the third piezoresistor R3 is connected to the power supply N terminal, the first end of the second discharge tube D4 is connected to the second end of the second piezoresistor R2 and the second end of the third piezoresistor R3, and the second end of the second discharge tube D4 is grounded.
Further, the lightning protection surge circuit further comprises a second lightning protection surge circuit for rapidly discharging a high voltage generated when the common mode choke coil is induced by a lightning stroke or operates over-voltage, the second lightning protection surge circuit comprising the common mode choke coil and a semiconductor discharge tube, wherein the common mode choke coil is used for reducing common mode interference; the semiconductor discharge tube is connected in parallel with two ends of the common mode choke coil and is used for rapidly discharging high voltage generated by the common mode choke coil due to lightning stroke induction or operation overvoltage.
Further, the lightning protection surge circuit further comprises a second lightning protection surge circuit for rapidly discharging a high voltage generated by the common mode choke coil due to lightning strike induction or operation overvoltage, the second lightning protection surge circuit comprises a common mode choke coil circuit board and a copper foil, wherein the common mode choke coil circuit board is used for reducing common mode interference; the copper foil is used for point discharge, is in a point shape, is placed at two ends of the common mode choke coil circuit board, and is placed with a gap of 1.0 mm-1.5 mm.
Further, the copper foil is in a shape of a sawtooth tip.
Furthermore, the copper foil is provided with via holes, and the surface of the copper foil is uniformly tinned.
Furthermore, the lightning protection surge circuit also comprises a third lightning protection surge circuit, the third lightning protection surge circuit is used for rapidly discharging high voltage generated by the Y capacitor due to lightning stroke induction or operation overvoltage, the third lightning protection surge circuit comprises the Y capacitor and copper foil, and the Y capacitor comprises a capacitor C4 and a capacitor C5 and is used for inhibiting common-mode interference; the copper foil is used for point discharge, the copper foil is in a point shape and is placed at two ends of a Y capacitor (C4 and C5), and the distance between the points is larger than 6.4 mm.
Further, the copper foil is in a shape of a sawtooth tip.
Another aspect of the present invention is to provide a cone beam CT, which includes the lightning protection surge circuit.
The beneficial technical effects are as follows:
1. the first lightning surge protection circuit comprises a high-voltage clamping element and a high-voltage protection element, wherein the first end of the high-voltage clamping element is connected with the first end of a power supply and is used for clamping the voltage to a relatively fixed voltage value; the high-voltage protection element is connected with the high-voltage clamping element in series, the first end of the high-voltage protection element is connected with the second end of the power supply, when the voltage at the two ends of the high-voltage protection element is higher than a protection regulation value, a short circuit phenomenon can occur inside the high-voltage protection element, the high-voltage protection element absorbs the over-high voltage, the voltage clamping element clamps the voltage and the high-voltage protection element rapidly transmits lightning stroke or surge energy to the ground when lightning stroke induction or overvoltage operation is carried out, and the power supply is protected from being damaged;
2. the second lightning surge protection circuit comprises a common mode choke coil and a semiconductor discharge tube, wherein the common mode choke coil is used for reducing common mode interference; the semiconductor discharge tube is used for rapidly discharging high voltage generated by the common mode choke coil due to lightning stroke induction or overvoltage operation, so that the high voltage generated by the common mode choke coil due to lightning stroke induction or overvoltage operation is rapidly discharged, and the common mode choke coil is prevented from flowing behind a power supply to damage a power device;
3. the second lightning surge protection circuit of the utility model comprises a common mode choke circuit board and a copper foil, wherein the common mode choke circuit board is used for reducing common mode interference; the copper foil is used for point discharge, the copper foil is in a point shape, the copper foil is placed at two ends of the common mode choke coil circuit board, the placing gap is 1.0-1.5 mm, and the point discharge is utilized to realize the rapid discharge of high voltage generated by the common mode choke coil due to lightning stroke induction or operation overvoltage;
4. the utility model discloses a third prevention thunderbolt surge circuit includes Y electric capacity and copper foil, and the Y electric capacity is used for restraining common mode interference; the copper foil is used for point discharge, the copper foil is in a point shape and is placed at two ends of a Y capacitor (C4 and C5), the distance between the points is larger than 6.4mm, high voltage generated when the Y capacitor is induced by lightning or is subjected to operation overvoltage is rapidly discharged by means of the point discharge, and the Y capacitor is protected from being damaged.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments will be briefly described below.
Fig. 1 is a diagram of a first surge protection circuit structure according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a second embodiment of a surge protection circuit according to the present invention;
fig. 3 is a circuit diagram of a second embodiment of a second surge protection circuit according to the present invention;
fig. 4 is a third lightning stroke prevention surge circuit structure diagram according to the embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The utility model discloses an aspect provides a surge installation is hit in lightning protection, including first surge circuit is hit in lightning protection, and first surge circuit is hit in lightning protection includes high-pressure clamping element and high-pressure protection component, and high-pressure clamping element first end is connected power L end for with voltage clamp to a relatively fixed voltage value, preferably, high-pressure clamping element is piezo-resistor; the high-voltage protection element is connected with the high-voltage clamping element in series, the first end of the high-voltage protection element is connected with the N end of the power supply, when the voltage at the two ends of the high-voltage protection element is higher than a protection regulation value, a short circuit phenomenon can occur inside the high-voltage protection element, and the high-voltage protection element absorbs the over-high voltage, and preferably the high-voltage protection element is a discharge tube.
As an embodiment of the present invention, referring to fig. 1, first piezo resistor R1 and first discharge tube D3 are connected in series, the first end of first piezo resistor R1 is connected to the power L terminal, the first end of first discharge tube D3 is connected to the power N terminal, second piezo resistor R2 and third piezo resistor R3 are connected in series, the first end of second piezo resistor R2 is connected to the power L terminal, the first end of third piezo resistor R3 is connected to the power N terminal, the second end of second piezo resistor R2 is connected to the first end of second discharge tube D4, the second end of third piezo resistor R3 is connected to the second end of second discharge tube D4 is grounded, the first lightning protection surge circuit is used for when lightning stroke response or operation overvoltage, piezo resistor clamps the voltage at the fixed value and the discharge tube will be struck rapidly with lightning or energy transmission to the ground, protect the power supply from being damaged.
Because the mouth-cone beam CT device needs to generate high frequency and high voltage, in order to effectively reduce common mode interference, a multi-stage common mode choke coil is provided in the EMI filter circuit, and when a lightning strike or surge occurs, a high voltage is induced on the common mode choke coil, which may damage components.
In view of the above problem, the surge protection circuit for lightning protection of this embodiment further includes a second surge protection circuit for lightning protection, as an embodiment of the second surge protection circuit for lightning protection of the present invention, referring to fig. 2, the second surge protection circuit for lightning protection includes a common mode choke and a semiconductor discharge tube, wherein the common mode choke is used to reduce common mode interference; the semiconductor discharge tube is connected in parallel with two ends of the common mode choke coil and used for rapidly discharging high voltage generated by the common mode choke coil due to lightning stroke induction or overvoltage operation, and the second lightning protection surge circuit is used for rapidly discharging high voltage generated by the common mode choke coil due to lightning stroke induction or overvoltage operation, consuming a part of energy of lightning stroke or surge, and avoiding the energy from flowing to the rear of a power supply and damaging a power device.
Considering that there are other circuits around the common mode choke coil, there is a second embodiment in the case where the semiconductor discharge tube shown in fig. 2 is not placed conditionally.
As the utility model discloses a second lightning protection surge circuit's another embodiment, second lightning protection surge circuit can also include common mode choke coil circuit board and copper foil, can place the copper foil at common mode choke coil circuit board's both ends (1, 4 feet and 2, 3 feet), see fig. 3, preferably, the copper foil is the most advanced form of sawtooth, set up the via hole on the copper foil, and the even tin of going up of copper foil surface, increase the overcurrent ability, form point discharge, thereby reach the purpose of releasing thunderbolt or surge energy, distance between the most advanced between two relative copper foils is 1.0mm ~ 1.5mm, if the clearance is too little, the copper skin can be burnt off to high pressure.
In the EMI filter circuit of cone beam CT, the Y capacitor (C4, C5) also needs to withstand very high voltages when struck by lightning or in surge.
As an optimal technical solution of the present invention, the lightning surge protection circuit further includes a third lightning surge protection circuit, see fig. 4, the third lightning surge protection circuit includes a Y capacitor and a copper foil, wherein the Y capacitor includes a capacitor C4 and a capacitor C5 for suppressing common mode interference; the copper foil is used for point discharge, preferably, the copper foil is in a sawtooth point shape and is placed at two ends of a Y capacitor (C4 and C5), the distance between the copper foil points is larger than 6.4mm (if the distance between the copper foil points is smaller than 6.4mm, hollowing is carried out), the Y capacitor (C4 and C5) also bears very high voltage when suffering from lightning stroke or surge, the copper foil with the sawtooth point is placed at the position, when the voltage is accumulated to a certain degree, discharge is carried out through the points, and a third lightning stroke prevention surge circuit realizes that high voltage generated when the Y capacitor is induced by lightning stroke or overvoltage operation is rapidly discharged.
The utility model discloses an on the other hand provides a cone beam CT, and cone beam CT includes preceding the surge circuit is hit in the lightning protection.
The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (10)
1. A lightning surge protection device comprising a first lightning surge protection circuit, wherein the first lightning surge protection circuit comprises:
the first end of the high-voltage clamping element is connected with the end L of the power supply and is used for clamping the voltage to a fixed voltage value;
the first end of the high-voltage protection element is connected with the second end of the high-voltage clamping element, the second end of the high-voltage protection element is connected with the N end of the power supply, and when the voltage at the two ends of the high-voltage protection element is higher than a protection regulation value, the internal short circuit of the high-voltage protection element absorbs the overhigh voltage.
2. The surge protection device according to claim 1, wherein the high voltage clamping element is a varistor, and the high voltage protection element is a discharge tube.
3. The lightning protection surge device of claim 1, wherein in the first lightning protection surge circuit, the high voltage clamping element is a first varistor R1, the high voltage protection element is a first discharge tube D3, the first lightning protection surge circuit further comprises a second varistor R2, a third varistor R3 and a second discharge tube D4, the second varistor R2 and the third varistor R3 are connected in series, a first end of the second varistor R2 is connected to a power supply L terminal, a first end of the third varistor R3 is connected to a power supply N terminal, a first end of the second varistor D4 is connected to a second end of the second varistor R2 and a second end of the third varistor R3, and a second end of the second discharge tube D4 is grounded.
4. The surge protection device according to claim 1, further comprising a second surge protection circuit for discharging a high voltage generated when the common mode choke is induced by a lightning stroke or operates over-voltage, the second surge protection circuit comprising:
a common mode choke to reduce common mode interference;
and the semiconductor discharge tube is connected in parallel with two ends of the common mode choke coil and is used for discharging high voltage generated by the common mode choke coil due to lightning stroke induction or overvoltage operation.
5. The lightning surge protection device according to claim 1, further comprising a second lightning surge protection circuit for rapidly discharging a high voltage generated when the common mode choke coil is induced by a lightning or operates over-voltage, the second lightning surge protection circuit comprising:
a common mode choke circuit board for reducing common mode interference;
and the copper foil is in a tip shape and is placed at two ends of the common mode choke coil circuit board, and the placing gap is 1.0-1.5 mm.
6. The surge protection device of claim 5, wherein the copper foil is saw-tooth-tip shaped.
7. The surge device of claim 5, wherein the copper foil has vias formed therein and the surface of the copper foil is uniformly tinned.
8. The surge protection device of claim 1, further comprising a third lightning surge protection circuit for discharging high voltage generated by the Y capacitor due to lightning induction or over-voltage operation, the third lightning surge protection circuit comprising:
a Y capacitor including a capacitor C4 and a capacitor C5 to suppress common mode interference;
the copper foil is in a tip shape and is placed at two ends of the Y capacitor, and the distance between the tips is larger than 6.4 mm.
9. The surge protection device of claim 8, wherein the copper foil is saw-tooth tip shaped.
10. A cone beam CT comprising a lightning surge protection device according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922410326.2U CN211239332U (en) | 2019-12-28 | 2019-12-28 | Lightning-protection surge device and cone beam CT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922410326.2U CN211239332U (en) | 2019-12-28 | 2019-12-28 | Lightning-protection surge device and cone beam CT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211239332U true CN211239332U (en) | 2020-08-11 |
Family
ID=71916422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922410326.2U Active CN211239332U (en) | 2019-12-28 | 2019-12-28 | Lightning-protection surge device and cone beam CT |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211239332U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072627A (en) * | 2020-09-17 | 2020-12-11 | 成都天锐星通科技有限公司 | Power supply protection circuit and electronic device |
-
2019
- 2019-12-28 CN CN201922410326.2U patent/CN211239332U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072627A (en) * | 2020-09-17 | 2020-12-11 | 成都天锐星通科技有限公司 | Power supply protection circuit and electronic device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101267112B (en) | Sudden wave protection circuit and connector and electronic device using this circuit | |
| CN211239332U (en) | Lightning-protection surge device and cone beam CT | |
| CN105305972B (en) | Radio-frequency front-end electromagnetic pulse protection module | |
| KR101474150B1 (en) | Power supply having surge protection circuit | |
| JP5192002B2 (en) | Surge energy conversion circuit | |
| JP6896728B2 (en) | Methods for Affecting Lightning Current Distribution in Electrical Systems Built into Wind Turbine Rotors | |
| CN205791502U (en) | A kind of lightning-protection module | |
| CN2511032Y (en) | Domestic-appliance lightning-stroke-proof apparatus of mainly preventing from inductive lightning | |
| US8599529B2 (en) | Active lightning protection | |
| CN213637073U (en) | Lightning surge protection circuit for navigation mark equipment | |
| CN115443055A (en) | Electrostatic protection circuit and electronic equipment | |
| CN208820468U (en) | A kind of Spark gap device applied to 806MHZ~2500MHZ radiofrequency signal | |
| CN204517400U (en) | The external interstitial structure zinc oxide arrester of low residual voltage | |
| KR102042379B1 (en) | Electrical equipment panel with surge protection apparatus | |
| CN208955654U (en) | A kind of signal wire nuclear electromagnetic pulse protector | |
| CN207884282U (en) | VGA vision signal circuit Electro-Magnetic Pulse Protection devices | |
| CN102287338B (en) | Lightning protection system, component and wind energy power generator blade with lightning protection system | |
| CN110190480A (en) | USB data line | |
| CN205335838U (en) | Short wave communication high altitude nuclear electromagnetic pulse protector | |
| CN206041468U (en) | Surge protection device and net gape transformer | |
| CN209730807U (en) | A kind of surge protector of suppressor pulse due to voltage spikes | |
| CN210985656U (en) | Signal lightning protection device with isolated ground wire | |
| CN217590255U (en) | Short wave protection circuit and protection assembly | |
| CN220368469U (en) | Electromagnetic pulse protection device for signal port of interference signal detection equipment | |
| CN108281949A (en) | RS422 communication bus lightning protection and surge restraint circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |