CN2779570Y - High energy ZnO and PTC compound component - Google Patents

Abstract

The utility model relates to a high energy zno and PTC compound component which makes an annular high energy zno non-linearity voltage-sensitive resistor and a PTC thermotropic sensitive resistor assembled and connected in series and parallel. The annular PTC resistor component can also be arranged by adopting a component in the shape of honeycomb ring. Two components or a plurality of components can be adopted to combine connecting circuits in series and parallel and the connecting circuits in series and parallel are compounded and superposed together in a circular cylinder shape. The components are separated and assembled by adopting a silver-plating soft clip cushion, a stainless steel electrode plate, a silicon rubber clip cushion and a DMC cleat insulator. A circular hole of the center is sheathed with a nylon insulating bushing. The utility model makes use of the voltage-sensitive characteristic of the zno nonlinear resistor of high energy and low field strength and the blocking and conducting characteristic of the PTC thermotropic sensitive resistor to be assembled into various compound components. The high energy zno and PTC compound component can be widely applied to the electric power field and is made into an over-voltage protector with fine characteristic, an electronic transformer of the switch contact of alternating current and direct current, which prevents an electric arc from being burnt and an energy transfer device used for demagnetization and over-voltage protection of a large-sized generator set.

Description

High energy ZnO and PTC multiple device

Technical field

The utility model relates to circuit breaker and the demagnetization of Generator Set and the high energy ZnO and the PTC multiple device of overvoltage protection of the AC and DC high-current on-off that is applicable to power domain.

Background technology

The AC and DC circuit breaker can form huge field intensity between contact in the process of high-current on-off, cause the free aggravation of metal fever, produce strong electric arc, the serious scaling loss and the harmfulness switching overvoltage of contact often taking place, cause equipment to puncture, causes serious accidents such as fire.Chinese invention patent 02115555.0 provides a kind of high-current on-off and demagnetization circuit of excitation system of large power generator set field circuit, insecure change of current device and complicated control loop have been abandoned, adopt a kind of PTC themistor part of high energy positive temperature coefficient, pressure is built in field suppression switch main contact in the major loop realization change of current, move high-current on-off and the quick de-excitation field that the energy technology realizes field circuit with high energy ZnO nonlinear resistance, its feature is: with the combined field circuit breaker of electronics of this technology manufacturing, volume is little, in light weight, not burning switch main contact, no harmfulness operability overvoltage, demagnetization speed is fast.But because the ZnO electronic ceramic is a kind of device of negative group of characteristic, and the V-A characteristic is harder, so when their many groups connection in series-parallel are used, can be subjected to certain restriction, except that parameters such as the leakage current of every valve block, residual voltage ratio being carried out strict test and joining the sheet by threshold voltage, also need serial connection flows resistance and fuse in each branch road, cause short circuit current to prevent uneven stream.

Summary of the invention

The purpose of this utility model provides a kind of not only have remarkable natural current-sharing, equal energy, current limiting performance; and little, in light weight, easy-to-install annular high energy ZnO of fill-in ratio and PTC multiple device; to make it to be widely used in the contact arc protection scaling loss of AC and DC switch; the demagnetization of Generator Set and overvoltage protection, combination can be made various electronic inverter DHQ, be moved high-power, big capacity devices such as energy device YNQ and over-pressure safety device GB neatly.

It is characterized in that of described high energy ZnO and PTC multiple device: non-linear piezo-resistance of high energy ZnO and the positive thermo-sensitive resistor of PTC that will make annular carry out the connection in series-parallel combination, and wherein Huan Xing PTC resistance device also can adopt the kit form setting of cellular annular shape; Said modules can adopt two or more to be combined into connection in series-parallel connecting circuit version composite stack together, is cylindric; Adopt silver-plated soft folder pad, stainless steel electrode sheet, silicone rubber plate, DMC cleat insulator to carry out the interval combination between the assembly, be with the nylon insulating sleeve in its central circular hole.

Described multiple device can adopt the series and parallel connecting circuit structure of various ways to constitute electronic inverter DHQ, moving can device YNQ and overvoltage protection GB.

Described electronic inverter DHQ composes in parallel (showing as Fig. 4-1,4-2) by many groups PTC resistance and ZnO resistance; Or forms by ZnO resistance serial connection PTC//ZnO, in the formula symbol " // " expression in parallel, promptly form by ZnO resistance serial connection PTC and the ZnO complex after also.(showing) as Fig. 3-1

Described move can device YNQ be connected in series ZnO resistance again after by ZnO resistance serial connection PTC//ZnO and form, promptly form (showing) as Fig. 5,6 by being connected in series ZnO resistance again behind the complex after ZnO resistance serial connection PTC and the ZnO parallel connection.

The operation principle explanation:

1. the electronic inverter DHQ key wiring diagram as Fig. 3-1 alternating-current switch shows.

R among Fig. 3-1 _NBe ZnO nonlinear resistance, R _TBe the PTC thermo-sensitive resistor.

Showing as Fig. 3, is example (high-voltage switch gear available strings parallel way increases capacity) with the 400V switch

Threshold voltage parameter designing principle:

${(R_{\mathrm{NA}1}+R_{\mathrm{NB}1})V}_{10\mathrm{ma}}\≥1.3\sqrt{2},V_{\mathrm{AB}}=690V$

V wherein _AB-line voltage

S-chargeability (getting 0.8 usually) is R then _A1=R _B1=R _C1During=1/2 * 690V=345V operate as normal, the switch contact closure, electronic inverter DHQ is inoperative, when switch trip, when switch fracture voltage during greater than 345V, the R among the DHQ _NA1With regard to conducting (because of R _TBe the very little high energy PTC device of resistance), with R _TAnd the R that connects _N2Except playing the voltage-limiting protection effect, also play energy-absorbing function.

2. the electronic inverter DHQ of dc switch

A is applicable to that self-excited system (operation principle has been done elaboration in patent 02115555.0) is mainly used in the change of current, blocks and build pressure (showing as Fig. 4-1).

B is used for the electronic inverter (showing as Fig. 4-2) that it encourages system

Its R _N1The selection V of threshold voltage _10ma〉=V _Zmax

V _Zmax-DC power supply maximum.

With double break mouth switch is example, and its change of current schematic diagram shows as 4.

Operation principle: when dc switch K was closed, electronic inverter was inoperative, when K switch trips, and its fracture voltage V _KOnly need greater than nonlinear resistance R _N11Residual voltage the time just can realize the change of current, R _TFor the initial very little high energy PTC assembly of resistance, when field supply is flowed through it, can realize the heating blocking-up, and set up voltage that at this moment the voltage at switch fracture two ends is 2 times R _N11+ R _N12Be connected in series later nonlinear resistance residual voltage.If, can realize quick de-excitation again at its two ends and connect that move can device.

3. moving can device YNQ

Originally be used to absorb the energy employing ZnO nonlinear resistance serial connection flows resistance of Generator's Rotor Circuit and the mode of fuse.Magnetism elimination circuit with the 12.5 ten thousand kilowatts of units in Ge Zhou Ba is an example, needs 48 also following circuit altogether, and device needs very big installing space (showing as Fig. 5-1).

Moving of now adopting can device YNQ be following winding diagram (showing as Fig. 5).Owing to adopt annular valve block R _NThe splice connection of assembling mode string is very convenient, and its function can also work preventing power supply short circuit except that energy-absorbing, the function of automatic current equalizing, and also the space of installing is original 1/6.

4. overvoltage protection GB (showing) as Fig. 6

In the ZnO nonlinear resistance, be connected in series R _T//R _NBe connected in series ZnO resistance again behind the device and form and make assembly, can overcome negative group of characteristic of nonlinear resistance effectively, prevent power supply short circuit, and meet R _NEffect be as circuit overcurrent R _TThe time, R _TExcept that absorbing the overvoltage amount, might when energy is excessive, can produce the disconnected phenomenon of thermal resistance, for release current, and meet R _NCan the splitter section electric current, and to R _TPlay the voltage-limiting protection effect, adopt this circuit after, the spike that can limit silicon controlled rectifier changes arc overvoltage amplitude, and can obtain higher chargeability, really plays effective overvoltage protection effect.

The beneficial effects of the utility model are:

The utility model patent is the improvement on former patent (my invention) basis.It can remedy aforesaid deficiency, and combination is made various electronic inverter DHQ, moved high-power, big capacity devices such as energy device YNQ and overvoltage protection GB neatly, and not only performance brilliance, and fill-in ratio is little, and is in light weight, is easy to install.Can be widely used in the contact preventing arc scaling loss of AC and DC switch, the demagnetization and the overvoltage protection of Generator Set.

Description of drawings

Fig. 1: annular high energy PTC multiple device structural representation;

The A-A cutaway view of Fig. 1-1: Fig. 1;

Fig. 2: high energy ZnO and PTC multiple device structural representation;

Fig. 3: embodiment 1 schematic diagram;

Fig. 3-1: the electronic inverter DHQ key wiring diagram of alternating-current switch;

Fig. 4: embodiment 2 schematic diagrams;

Fig. 4-1,4-2: the electronic inverter DHQ schematic diagram that is applicable to the dc switch of automatic system;

Fig. 5: embodiment 3 schematic diagrams;

Fig. 5-1: the magnetism elimination circuit of former 12.5 ten thousand kilowatts of units moves energy device YNQ schematic diagram;

Fig. 6: embodiment 4 schematic diagrams;

Fig. 7: embodiment 5 schematic diagrams.

Among the figure: K-mechanical switch main contact, R _T-PTC thermistor, R _N-ZnO varistor, 1,5,13, the 15-fastening bolt, 4, the 14-clamp nut, 2, the 11-pad, 3-copper sheathing, 6-silicone rubber plate, 7-annular high energy ZnO, the silver-plated soft folder pad of 8-, stainless steel electrode sheet; The 9-DMC clamping plate; The 10-galvanized iron sheet; The 12-spring washer.

Embodiment

Below in conjunction with accompanying drawing explanation is done into-gone on foot to the utility model: silicone rubber plate 6 is provided with the positive thermo-sensitive resistor of a plurality of high energy PTC of cellular annular shape among Fig. 1.

Among Fig. 2, non-linear piezo-resistance high energy ZnO 7 is annular, positive thermo-sensitive resistor PTC also be annular or for the cellular annular shape, two or more said modules with series connection or/and the circuit structure form that is connected in parallel, mechanical type with composite stack is combined into one, and it is cylindric that integral body is; Adopt DMC clamping plate 9 between each layer assembly, silver-plated soft folder pad, stainless steel electrode sheet 8, silicone rubber plate 6, carry out interval, the end face of cylindric multiple device and bottom surface are galvanized iron sheet 10, and there is a perforation circular hole in the central authorities of cylindric multiple device.Among Fig. 21,2,3,4,15 fastening bolts are the binding post member.

Embodiment 1 is the electronic inverter DHQ key wiring diagram of alternating-current switch as Fig. 3, when its course of work is operate as normal, and the switch contact closure, electronic inverter DHQ is inoperative, when switch trip, when switch fracture voltage during greater than 345V, the R among the DHQ _NA1With regard to conducting (because of R _TBe the very little high energy PTC device of resistance), with R _TAnd the R that connects _NAExcept playing the voltage-limiting protection effect, also play energy-absorbing function.

Embodiment 2 is electronic inverter DHQ key wiring diagrams (showing as Fig. 4) of dc switch, and when its course of work was dc switch K1, K2 closure, electronic inverter DHQ was inoperative, when K switch 1, K2 tripping operation, and its fracture voltage V _KOnly need greater than nonlinear resistance R _N1Residual voltage the time just can realize the change of current, R _TBe the initial very little high energy PTC assembly of resistance, when field supply is flowed through it, can realize the heating blocking-up and set up voltage that at this moment the voltage at switch port two ends is 2 times R _N1+ R _N2Serial connection nonlinear resistance residual voltage afterwards.If again at its two ends and connect move can device YNQ, can realize quick de-excitation.

Embodiment 3 be move can device YNQ key wiring diagram such as Fig. 5 show owing to adopt annular valve block R _NThe splice connection of assembling mode string is very convenient, and its function can also work preventing power supply short circuit except that energy-absorbing, the function of automatic current equalizing, and also the space of installing is original 1/6.

Embodiment 4 is overvoltage protection GB key wiring diagrams (showing as Fig. 6), is connected in series R in the ZnO nonlinear resistance _T//R _NBe connected in series ZnO behind the device again and make assembly, can overcome negative group of characteristic of nonlinear resistance effectively, prevent power supply short circuit, and meet R _NEffect be as circuit overcurrent R _TThe time, R _TExcept that absorbing the overvoltage amount, when possible energy is excessive, can produce the blocking-up phenomenon, for release current, and meet R _NCan the splitter section electric current, and to R _TPlay the voltage-limiting protection effect, adopt this circuit after, the spike that can limit silicon controlled rectifier changes arc overvoltage amplitude, and can obtain higher chargeability, really plays effective voltage protection effect.

Embodiment 5 shows as Fig. 7, adopts the DHQ electronic inverter, can be used in the self-excited system, and magnetic field switching K is in the tripping operation process.Because high energy PTC is the very little thermo-sensitive resistor of initial resistance; so be easy to realize to the switch change of current; can not produce the electric arc of scaling loss switch contact, the effect of D1 is for not influencing normal inversion when shutting down among Fig. 7, and the effect of D2 is in order to block the effect of forward supply voltage.Use DHQ can guarantee that contact realizes non-maintaining operation, the energy that YNQ is mainly used to store in the absorption inductor, GB are used for absorbing the overvoltage in the rotor loop.

Claims (5)

1. high energy ZnO and PTC multiple device, it is characterized in that: non-linear piezo-resistance high energy ZnO (7) is annular, positive thermo-sensitive resistor PTC also be annular or for the cellular annular shape, two or more said modules are to connect or/and the circuit structure form that is connected in parallel, mechanical type with composite stack is combined into one, and it is cylindric that integral body is; Adopt DMC clamping plate (9) between each layer assembly, silver-plated soft folder pad, stainless steel electrode sheet (8), silicone rubber plate (6), carry out interval, the end face of cylindric multiple device and bottom surface are galvanized iron sheet (10), and there is a perforation circular hole in the central authorities of cylindric multiple device.

2. high energy ZnO according to claim 1 and PTC multiple device is characterized in that: described multiple device can adopt the series and parallel connecting circuit structure of various ways to constitute electronic inverter DHQ, moving can device YNQ and overvoltage protection GB.

3. high energy ZnO according to claim 1 and PTC multiple device, it is characterized in that: the central perforation in the circular hole of aforementioned multiple device is with the nylon insulating sleeve, and multiple device is fixed into one by fastening bolt (13), clamp nut (14), spring washer (12), pad (11).

4. high energy ZnO according to claim 1 and 2 and PTC multiple device is characterized in that: described electronic inverter DHQ is composed in parallel by many groups PTC resistance and ZnO resistance; Or form by ZnO resistance serial connection PTC and the ZnO complex after also.

5. high energy ZnO according to claim 1 and 2 and PTC multiple device is characterized in that: described move can device YNQ be connected in series ZnO resistance again after by the complex after ZnO resistance serial connection PTC and the ZnO parallel connection and form.

Images