CN203705598U - Thyristor fault detection device - Google Patents
Thyristor fault detection device Download PDFInfo
- Publication number
- CN203705598U CN203705598U CN201320851883.8U CN201320851883U CN203705598U CN 203705598 U CN203705598 U CN 203705598U CN 201320851883 U CN201320851883 U CN 201320851883U CN 203705598 U CN203705598 U CN 203705598U
- Authority
- CN
- China
- Prior art keywords
- thyristor
- output
- electrically connected
- pick
- output terminal
- 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.)
- Expired - Lifetime
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 47
- 230000015556 catabolic process Effects 0.000 claims description 34
- 239000003990 capacitor Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
Abstract
The utility model provides a thyristor fault detection device, which comprises a switch, a first switch control mechanism, a voltage detection mechanism and a fault judgment mechanism. The switch is connected in series with a soft-start resistor and then is connected in parallel with the two ends of a thyristor. The input end of the voltage detection mechanism is respectively connected with the two ends of the thyristor so as to detect the voltage difference between the two ends of the thyristor. The output end of the voltage detection mechanism is electrically connected with a controller. The first switch control mechanism is connected in series with the voltage detection mechanism. According to the technical scheme of the utility model, by means of the thyristor fault detection device, when the thyristor breaks down, a driver is prevented from working on. Therefore, the damage to a capacitor and even the controller can be avoided. Meanwhile, the thyristor fault detection device is simple in structure and convenient to use.
Description
Technical field
The utility model relates to pick-up unit technical field, particularly relates to a kind of transistors breakdown pick-up unit.
Background technology
In the rectification circuit of linear motor driver, often use the rectification module with thyristor, after controller switches on power, AC power is converted into direct supply by rectifying part in rectification module, then charges to the electric capacity that is connected in parallel on DC bus two ends by the soft resistance that opens.In the time that the voltage on electric capacity reaches certain value, controller control thyristor is opened.After thyristor conducting, the soft resistance that opens is bypassed, and controller completes power up.But when thyristor occurs opening circuit or the fault of short circuit, and controller is cannot know the malfunction of thyristor time, can cause the damage of electric capacity, even may damage controller.
Utility model content
In view of the present situation of prior art, the purpose of this utility model is to provide a kind of transistors breakdown pick-up unit, make in the power up of controller, this transistors breakdown pick-up unit can judge whether fault of thyristor, and send the duty of thyristor to controller, avoid causing the damage of electric capacity and controller.
For achieving the above object, the utility model adopts following technical scheme:
A kind of transistors breakdown pick-up unit, comprises switch, the first switching control mechanism, voltage detection mechanism and fault decision mechanism;
Described switch and the soft two ends that are connected in parallel on thyristor after resistance is connected of opening;
The input end of described voltage detection mechanism connects respectively described thyristor two ends, for detection of the voltage difference at thyristor two ends; The output terminal of described voltage detection mechanism is electrically connected with the input end of described fault decision mechanism;
The output terminal of described fault decision mechanism is electrically connected with controller, and described the first switching control mechanism is connected with described voltage detection mechanism.
In an embodiment, also comprise accessory power supply and second switch control gear therein;
The input end of described accessory power supply connects respectively the negative electrode of described thyristor and the lower brachium pontis of DC bus, and the output terminal of described accessory power supply is electrically connected with described second switch control gear;
The output terminal of described second switch control gear is electrically connected with described the first switching control mechanism.
In an embodiment, described switch is open type switch therein.
In an embodiment, described switch is closed type switch therein.
In an embodiment, described fault decision mechanism comprises comparison testing agency and fault logic output mechanism therein;
The described relatively input end of testing agency and the output terminal of described voltage detection mechanism are electrically connected, and the described relatively output terminal of testing agency is electrically connected with the input end of described fault logic output mechanism;
The output terminal of described fault logic output mechanism is electrically connected with described controller.
In an embodiment, described relatively testing agency is comparer therein.
In an embodiment, described fault decision mechanism is CPU therein;
The input end of described CPU is electrically connected with the output terminal of voltage detection mechanism, and the output terminal of described CPU is electrically connected with described controller.
In an embodiment, described CPU is single-chip microcomputer, DSP, ARM, CPLD, FPGA or other programmable microprocessors therein.
The beneficial effects of the utility model are:
Transistors breakdown pick-up unit of the present utility model, judges the duty of thyristor by the voltage difference that detects thyristor two ends, and sends the duty of thyristor to controller, controller is made corresponding protection according to the duty of thyristor.The even damage of controller of electric capacity that has prevented like this driver from working in the time of transistors breakdown and to cause.And, simple in structure, easy to use.
Brief description of the drawings
Fig. 1 is the system diagram of transistors breakdown pick-up unit Chang Kaifang formula of the present utility model one embodiment;
Fig. 2 is the system diagram of another embodiment of transistors breakdown pick-up unit Chang Kaifang formula of the present utility model;
Fig. 3 is the system diagram of normally closed mode one embodiment of transistors breakdown pick-up unit of the present utility model;
Fig. 4 is the system diagram of normally closed another embodiment of mode of transistors breakdown pick-up unit of the present utility model.
Embodiment
In order to make the technical solution of the utility model clearer, below in conjunction with accompanying drawing, transistors breakdown pick-up unit of the present utility model and method are described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the utility model and to be not used in restriction the utility model.
Referring to Fig. 1 to Fig. 4, this transistors breakdown pick-up unit is arranged between the electric capacity of rectification module A1 and its rear end.Wherein, rectification module A1 comprises rectification circuit and thyristor VT1, and rectification circuit forms rectifier bridge by six diode V1～V6, for AC power is converted into direct supply.Thyristor VT1 is arranged on the upper brachium pontis of DC bus, and the anode of thyristor VT1 is connected with the cathodic electricity of diode V1～V3.
This transistors breakdown pick-up unit comprises K switch, the first switching control mechanism U0, voltage detection mechanism U1 and fault decision mechanism.Wherein, K switch and the soft two ends that are connected in parallel on thyristor VT1 after resistance R is connected of opening.Be that soft one end of opening resistance R is electrically connected with the anode of thyristor VT1, softly open the other end of resistance R and one end of K switch is electrically connected, the other end of K switch connects the negative electrode of thyristor VT1.The first switching control mechanism U0 connects with voltage detection mechanism U1, and after powering at controller, gauge tap K is in closure state; After the capacitor charging of rear end completes, gauge tap K is in open mode.
Two input ends of voltage detection mechanism U1 connect respectively the two ends of thyristor VT1, and one of them input end of voltage detection mechanism connects the anode of thyristor VT1, and another input end of voltage detection mechanism connects the negative electrode of thyristor VT1.The output terminal of voltage detection mechanism U1 connects the input end of fault decision mechanism, and the output terminal of fault decision mechanism connects controller.
Voltage detection mechanism U1 is for detection of the voltage difference V0 at thyristor VT1 two ends, and sends this voltage difference V0 to fault decision mechanism.Fault decision mechanism is analyzed the duty of thyristor VT1 according to the voltage difference V0 at the thyristor two ends that receive, and sends the duty of thyristor VT1 to controller.It should be understood that the duty of thyristor VT1 comprises that thyristor is normally worked, thyristor opens circuit and thyristor short circuit herein.
According to the type difference of K switch, this transistors breakdown pick-up unit can be divided into the transistors breakdown pick-up unit of Chang Kaifang formula and the transistors breakdown pick-up unit of normally closed mode.
Be the system diagram of the Chang Kaifang formula of transistors breakdown pick-up unit of the present utility model as depicted in figs. 1 and 2, wherein, K switch is open type switch and connects with the soft resistance R that opens.In the time that controller does not power on, K switch is in open mode.After controller powers on, the first switching control mechanism U0 gauge tap K closure.After rear end capacitor charging completes, the first switching control mechanism U0 gauge tap K opens.
As a kind of embodiment, in the embodiment of the Chang Kaifang formula of this transistors breakdown pick-up unit, also comprise accessory power supply U4 and second switch control gear U5.Two input ends of accessory power supply U4 are connected to respectively the negative electrode of thyristor VT1 and the lower brachium pontis of DC bus.The output terminal of accessory power supply U4 connects the input end of second switch control gear U5, and the output terminal of second switch control gear U5 connects the first switching control mechanism U0.
Accessory power supply U4 in the time that busbar voltage reaches certain voltage value (being generally less than the magnitude of voltage of normal work) for controller provides power supply, and export the normal working signal of accessory power supply U4.Second switch control gear U5 exports control signal after receiving the normal working signal of accessory power supply U4, and sends this control signal to first switch control structure U0, and the first switching control mechanism U0 gauge tap K recovers the state of opening.
Be illustrated in figure 1 the system diagram of an embodiment of transistors breakdown pick-up unit Chang Kaifang formula of the present utility model, wherein, fault decision mechanism comprises the U2 of comparison testing agency and fault logic output mechanism U3.And relatively the input end of the U2 of testing agency is electrically connected with the output terminal of voltage detection mechanism U1, relatively the output terminal of the U2 of testing agency is electrically connected with the input end of fault logic output mechanism U3.Preferably, relatively the U2 of testing agency is comparer.The output terminal of fault logic output mechanism U3 is electrically connected with controller, makes controller can know the duty of thyristor and makes corresponding protection action.
In the time that the voltage difference V0 at thyristor VT1 two ends is greater than the poor V1 of predeterminated voltage of the U2 of comparison testing agency, the relatively U2 of testing agency output logic level a, wherein, logic level a can be high level or low level.In the time that the voltage difference V0 at thyristor VT1 two ends is less than the poor V1 of predeterminated voltage of the U2 of comparison testing agency, the relatively U2 of testing agency output logic level
.For example, in the time of V0 > V1, relatively the U2 of testing agency output logic level is 1, and, in the time of V0 < V1, relatively the output logic level of the U2 of testing agency is 0.
Fault logic output mechanism U3 judges the duty of thyristor according to the logic level of the U2 of the comparison testing agency output receiving, and sends the duty of thyristor to controller.In the time that thyristor VT1 normally works, in the process powering at controller, thyristor VT1 is bypassed, and now the voltage difference V0 at thyristor two ends is larger, V0 > V1.After controller has powered on, K switch is opened, controller control thyristor VT1 conducting, and now, the voltage difference V0 at thyristor two ends can be decreased to gradually and approach 0V, V0 < V1.Therefore, in the time that thyristor VT1 normally works, the first output logic level of voltage detection mechanism U1 a, rear output logic level
.
Now, the corresponding output of fault logic output mechanism U3 two-way level value.In the time of the first output logic level of voltage detection mechanism U1 a, a wherein road output logic level b(logic level b of fault logic output mechanism U3 can be high level or low level) and by the value locking of this logic level b.And logic level
wherein Vu3 represents the original levels of fault logic output mechanism U3.Another road output logic level c of fault logic output mechanism U3.
When output logic level after voltage detection mechanism U1
time, a wherein road output logic level b(logic level b of fault logic output mechanism U3 can be high level or low level) and by the value locking of this logic level b.And logic level
wherein Vu3 represents the original levels of fault logic output mechanism U3.Another road output logic level of fault logic output mechanism U3
.
In the time that thyristor VT1 opens circuit, the voltage difference V0 at thyristor two ends is greater than the poor V1 of predeterminated voltage of the U2 of comparison testing agency all the time, and relatively the output of the U2 of testing agency is always logic level a.Now, a wherein road output logic level b(logic level b of fault logic output mechanism U3 can be high level or low level) and by the value locking of this logic level b.And logic level
wherein Vu3 represents the original levels of fault logic output mechanism U3.Another road output logic level c of fault logic output mechanism U3.
In the time of thyristor VT1 short circuit, the voltage difference V0 at thyristor two ends is close to 0V, and the voltage difference V0 at thyristor two ends is less than the poor V1 of predeterminated voltage of the U2 of comparison testing agency all the time, and relatively the output of the U2 of testing agency is always logic level
.Now, a wherein road output logic level b(logic level b of fault logic output mechanism U3 can be high level or low level) and by the value locking of this logic level b.And logic level
wherein Vu3 represents the original levels of fault logic output mechanism U3.Another road output logic level of fault logic output mechanism U3
.
In sum, in the time that thyristor VT1 normally works, the level value of logic decision mechanism output exists by logic level c to logic level
saltus step phenomenon.In the time that thyristor VT1 opens circuit, the level of logic decision mechanism output is always level c.In the time of thyristor VT1 short circuit, logic judges that the level of output mechanism output is always
.Controller, according to the level value of logic decision mechanism transmission, judges the duty of thyristor.
Be illustrated in figure 2 the system diagram of another embodiment of transistors breakdown pick-up unit Chang Kaifang formula of the present utility model.Wherein, fault decision mechanism is CPU.And the input end of CPU is electrically connected with the output terminal of voltage detection mechanism U1, and the output terminal of CPU is electrically connected with controller.Preferably, CPU can be single-chip microcomputer, DSP, ARM, CPLD, FPGA or other programmable microprocessors.
In the time that thyristor VT1 normally works, the first output logic level of voltage detection mechanism U1 a, rear output level
.In the time that thyristor VT1 opens circuit, voltage detection mechanism U1 is output logic level a all the time.In the time of thyristor VT1 short circuit, voltage detection mechanism U1 is output logic level all the time
.Like this, CPU can, according to the level value of voltage detection mechanism U1 output, judge the duty of thyristor, and send the duty of thyristor to controller.
Be the system diagram of the normally closed mode of transistors breakdown pick-up unit of the present utility model as shown in Figure 3 and Figure 4, wherein, K switch is closed type switch and connects with the soft resistance R that opens.In the time that controller does not power on, K switch is in closure state.After controller powers on, K switch is still in closure state.After rear end capacitor charging completes, the first switching control mechanism U0 gauge tap K opens.
Be illustrated in figure 3 the system diagram of an embodiment of the normally closed mode of transistors breakdown pick-up unit of the present utility model, wherein, fault decision mechanism comprises the U2 of comparison testing agency and fault logic output mechanism U3.And relatively the input end of the U2 of testing agency is electrically connected with the output terminal of voltage check device U1, relatively the output terminal of the U2 of testing agency is electrically connected with the input end of fault logic output mechanism U3.Preferably, the U2 of this comparison testing agency is comparer.The output terminal of fault logic output mechanism U3 is electrically connected with controller, makes controller can know the duty of thyristor and makes corresponding protection action.
In the time that the voltage difference V0 at thyristor VT1 two ends is greater than the poor V1 of predeterminated voltage of the U2 of comparison testing agency, the relatively U2 of testing agency output logic level a, wherein, logic level a can be high level or low level.In the time that the voltage difference V0 at thyristor VT1 two ends is less than the poor V1 of predeterminated voltage of the U2 of comparison testing agency, the relatively U2 of testing agency output logic level
.For example, in the time of V0 > V1, relatively the U2 of testing agency output level is 1, and, in the time of V0 < V1, relatively the output level of the U2 of testing agency is 0.
The duty of the electrical level judging thyristor that fault logic output mechanism U3 exports according to the U2 of comparison testing agency receiving, and send the duty of thyristor to controller.In the time that thyristor VT1 normally works, in the process powering at controller, thyristor VT1 is bypassed, and now the voltage difference V0 at thyristor two ends is larger, V0 > V1.After controller has powered on, K switch is opened, controller control thyristor VT1 conducting, and now, the voltage difference V0 at thyristor two ends can be decreased to gradually and approach 0V, V0 < V1.Therefore, in the time that thyristor VT1 normally works, the first output level a of voltage detection mechanism U1, rear output level
.
Now, the corresponding output of fault logic output mechanism U3 two-way level value.In the time of the first output logic level of voltage detection mechanism U1 a, a wherein road output logic level b(logic level b of fault logic output mechanism U3 can be high level or low level) and by the value locking of this logic level b.And logic level
wherein Vu3 represents the original levels of fault logic output mechanism U3.Another road output logic level c of fault logic output mechanism U3.
When output logic level after voltage detection mechanism U1
time, a wherein road output logic level b(logic level b of fault logic output mechanism U3 can be high level or low level) and by the value locking of this logic level b.And logic level
wherein Vu3 represents the original levels of fault logic output mechanism U3.Another road output logic level of fault logic output mechanism U3
.
In the time that thyristor VT1 opens circuit, the voltage difference V0 at thyristor two ends is greater than the poor V1 of predeterminated voltage of the U2 of comparison testing agency all the time, and relatively the output of the U2 of testing agency is always logic level a.Now, a wherein road output logic level b(logic level b of fault logic output mechanism U3 can be high level or low level) and by the value locking of this logic level b.And logic level
wherein Vu3 represents the original levels of fault logic output mechanism U3.Another road output logic level c of fault logic output mechanism U3.
In the time of thyristor VT1 short circuit, the magnitude of voltage V0 at thyristor two ends is close to 0V, and the voltage difference V0 at thyristor two ends is less than the poor V1 of predeterminated voltage of the U2 of comparison testing agency all the time, and relatively the output of the U2 of testing agency is always level
.Now, a wherein road output logic level b(logic level b of fault logic output mechanism U3 can be high level or low level) and by the value locking of this logic level b.And logic level
wherein Vu3 represents the original levels of fault logic output mechanism U3.Another road output logic level of fault logic output mechanism U3
.
In sum, in the time that thyristor VT1 normally works, the level value of logic decision mechanism output exists by logic level c to logic level
saltus step phenomenon.In the time that thyristor VT1 opens circuit, the level of logic decision mechanism output is always logic level c.In the time of thyristor VT1 short circuit, logic judges that the level of output mechanism output is always logic
.Controller, according to the level value of logic decision mechanism transmission, judges the duty of thyristor.
Be illustrated in figure 4 the system diagram of another embodiment of transistors breakdown pick-up unit Chang Kaifang formula of the present utility model.Wherein, fault decision mechanism is CPU.And the input end of CPU is electrically connected with the output terminal of voltage detection mechanism U1, and the output terminal of CPU is electrically connected with controller.Preferably, CPU can be single-chip microcomputer, DSP, ARM, CPLD, FPGA or other programmable microprocessors.
In the time that thyristor VT1 normally works, the first output logic level of voltage detection mechanism U1 a, rear output logic level
.In the time that thyristor VT1 opens circuit, voltage detection mechanism U1 is output logic level a all the time.In the time of thyristor VT1 short circuit, voltage detection mechanism U1 is output logic level all the time
.Like this, CPU can, according to the level value of voltage detection mechanism U1 output, judge the duty of thyristor, and send the duty of thyristor to controller.
Transistors breakdown pick-up unit of the present utility model, judges the duty of thyristor by the voltage difference that detects thyristor two ends, and sends the duty of thyristor to controller, controller is made corresponding protection according to the duty of thyristor.The even damage of controller of electric capacity that has prevented like this driver from working in the time of transistors breakdown and to cause.And, simple in structure, easy to use.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (8)
1. a transistors breakdown pick-up unit, is characterized in that:
Comprise switch, the first switching control mechanism, voltage detection mechanism and fault decision mechanism;
Described switch and the soft two ends that are connected in parallel on thyristor after resistance is connected of opening;
The input end of described voltage detection mechanism connects respectively described thyristor two ends, for detection of the voltage difference at thyristor two ends; The output terminal of described voltage detection mechanism is electrically connected with the input end of described fault decision mechanism;
The output terminal of described fault decision mechanism is electrically connected with controller, and described the first switching control mechanism is connected with described voltage detection mechanism.
2. transistors breakdown pick-up unit according to claim 1, is characterized in that:
Also comprise accessory power supply and second switch control gear;
The input end of described accessory power supply connects respectively the negative electrode of described thyristor and the lower brachium pontis of DC bus, and the output terminal of described accessory power supply is electrically connected with the input end of described second switch control gear;
The output terminal of described second switch control gear is electrically connected with described the first switching control mechanism.
3. transistors breakdown pick-up unit according to claim 2, is characterized in that:
Described switch is open type switch.
4. transistors breakdown pick-up unit according to claim 1, is characterized in that:
Described switch is closed type switch.
5. according to the transistors breakdown pick-up unit described in claim 1-4 any one, it is characterized in that:
Described fault decision mechanism comprises comparison testing agency and fault logic output mechanism;
The described relatively input end of testing agency and the output terminal of described voltage detection mechanism are electrically connected, and the described relatively output terminal of testing agency is electrically connected with the input end of described fault logic output mechanism;
The output terminal of described fault logic output mechanism is electrically connected with described controller.
6. transistors breakdown pick-up unit according to claim 5, is characterized in that:
Described relatively testing agency is comparer.
7. according to the transistors breakdown pick-up unit described in claim 1-4 any one, it is characterized in that:
Described fault decision mechanism is CPU;
The input end of described CPU is electrically connected with the output terminal of voltage detection mechanism, and the output terminal of described CPU is electrically connected with described controller.
8. transistors breakdown pick-up unit according to claim 7, is characterized in that:
Described CPU is single-chip microcomputer, DSP, ARM, CPLD, FPGA or other programmable microprocessors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320851883.8U CN203705598U (en) | 2013-12-20 | 2013-12-20 | Thyristor fault detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320851883.8U CN203705598U (en) | 2013-12-20 | 2013-12-20 | Thyristor fault detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203705598U true CN203705598U (en) | 2014-07-09 |
Family
ID=51056018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320851883.8U Expired - Lifetime CN203705598U (en) | 2013-12-20 | 2013-12-20 | Thyristor fault detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203705598U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730441A (en) * | 2013-12-20 | 2015-06-24 | 中国科学院宁波材料技术与工程研究所 | Thyristor fault detecting device |
| CN106992499A (en) * | 2016-03-22 | 2017-07-28 | 上海兆力电器制造有限公司 | Controllable silicon for intermediate frequency furnace detects protection device and intermediate frequency furnace |
| CN107728035A (en) * | 2017-10-26 | 2018-02-23 | 厦门科华恒盛股份有限公司 | The detection method and three phase mains of transistors breakdown in a kind of three phase mains |
| CN108828421A (en) * | 2018-04-09 | 2018-11-16 | 厦门科华恒盛股份有限公司 | A kind of thyristor malfunction detection system and method |
| CN110061477A (en) * | 2014-12-24 | 2019-07-26 | 株式会社杰士汤浅国际 | Apparatus for protecting power supply, power supply device, fault diagnosis method for switch and recording medium |
-
2013
- 2013-12-20 CN CN201320851883.8U patent/CN203705598U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730441A (en) * | 2013-12-20 | 2015-06-24 | 中国科学院宁波材料技术与工程研究所 | Thyristor fault detecting device |
| CN104730441B (en) * | 2013-12-20 | 2018-07-17 | 中国科学院宁波材料技术与工程研究所 | Transistors breakdown detection device |
| CN110061477A (en) * | 2014-12-24 | 2019-07-26 | 株式会社杰士汤浅国际 | Apparatus for protecting power supply, power supply device, fault diagnosis method for switch and recording medium |
| CN110061477B (en) * | 2014-12-24 | 2021-06-29 | 株式会社杰士汤浅国际 | Power supply protection device, power supply device, switch failure diagnosis method, and recording medium |
| CN106992499A (en) * | 2016-03-22 | 2017-07-28 | 上海兆力电器制造有限公司 | Controllable silicon for intermediate frequency furnace detects protection device and intermediate frequency furnace |
| CN106992499B (en) * | 2016-03-22 | 2019-07-26 | 上海兆力电器制造有限公司 | Silicon-controlled detection protective device and intermediate frequency furnace for intermediate frequency furnace |
| CN107728035A (en) * | 2017-10-26 | 2018-02-23 | 厦门科华恒盛股份有限公司 | The detection method and three phase mains of transistors breakdown in a kind of three phase mains |
| CN108828421A (en) * | 2018-04-09 | 2018-11-16 | 厦门科华恒盛股份有限公司 | A kind of thyristor malfunction detection system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104730441A (en) | Thyristor fault detecting device | |
| CN203705598U (en) | Thyristor fault detection device | |
| CN201550026U (en) | Special photovoltaic control inverter for solar energy | |
| CN204758699U (en) | A insulating impedance detection circuitry for photovoltaic inverter | |
| CN206164112U (en) | A attenuating device is inductiond to anti current potential for photovoltaic power generation system | |
| CN204231188U (en) | Power conversion circuit and transducer air conditioning | |
| CN102769336B (en) | Single-phase inverter for emergency power supply | |
| CN205051933U (en) | LED's drive power supply | |
| CN204597597U (en) | A kind of domestic solar electric power system | |
| CN205709258U (en) | Elevator standby electricity management and control system | |
| CN204681157U (en) | A kind of intelligent double-power control system | |
| CN202749900U (en) | Singe-phase inverter for emergency power supply | |
| CN202524312U (en) | Switch power supply possessing alternating current 110/220V automatic switchover function | |
| CN106058816B (en) | A kind of two level overload protection method | |
| CN202474856U (en) | Photovoltaic inverter system with direct-current false connection prevention function | |
| CN104810898A (en) | Domestic solar power supply system and control method thereof | |
| CN202978236U (en) | Current limiting protection circuit of AC current of photovoltaic inverter | |
| CN208571693U (en) | A kind of alternating current-direct current automatic switchover power supply system | |
| CN203632211U (en) | Short circuit protective device being capable of self-recovery | |
| CN102709999A (en) | Energy-saving charger | |
| CN208423927U (en) | A kind of ac-dc power supply circuit | |
| CN103241136B (en) | Low-voltage electromobile Drive and Control Circuit | |
| CN206471859U (en) | A kind of battery clamp safety management system of car emergency startup power supply | |
| CN205863904U (en) | A kind of inverter of two grades of overload protections | |
| CN219554587U (en) | Short-circuit protection circuit for direct-current distribution network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jiang Zhe Inventor after: Zhang Chi Inventor after: Chen Long Inventor after: Liu Qiang Inventor before: Jiang Zhe Inventor before: Zhang Chi Inventor before: Chen Long Inventor before: Liu Qiang |
|
| COR | Change of bibliographic data | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |
|
| CX01 | Expiry of patent term |