CN201804797U - AC contactor with electronic type short circuit self-locking function - Google Patents
AC contactor with electronic type short circuit self-locking function Download PDFInfo
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- CN201804797U CN201804797U CN2010201322870U CN201020132287U CN201804797U CN 201804797 U CN201804797 U CN 201804797U CN 2010201322870 U CN2010201322870 U CN 2010201322870U CN 201020132287 U CN201020132287 U CN 201020132287U CN 201804797 U CN201804797 U CN 201804797U
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- short circuit
- contactor
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- circuit
- locking
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Abstract
The utility model relates to an AC contactor with electronic type short circuit self-locking function. The AC contactor includes an AC contactor body. The AC contactor body includes a casing, wherein a short-circuit self-locking part is arranged inside the casing; the short-circuit self-locking part includes a current acquisition unit used for acquiring current signals of phase lines, a short circuit detection unit for obtaining voltage signals representing current signals, comparing the voltage signals with reference signals, and outputting short circuit detection signals in the event of short circuit, a short-circuit self-locking execution unit for obtaining short circuit detection signals and triggering the AC contactor body to generate and retain open-circuit action, and a self-locking removing unit used for the AC contactor body to remove the self locking and reset.
Description
Technical field
The utility model relates to a kind of A.C. contactor with defencive function, particularly be a kind of A.C. contactor with electronic short circuit self-locking function.
Background technology
As everyone knows, in existing control appliance, A.C. contactor extensively is used in cut-offfing of power circuit and control field as a kind of important device.Usually it is to utilize main contact to open and close circuit, carries out control command with auxiliary contact.Main contact generally has only normal opened contact, and auxiliary contact often has two pairs of contacts with Chang Kai and normally closed function, and small-sized contactor also often cooperates main circuit to use as auxiliary relay.
The contact of A.C. contactor is made by silver alloy, has good electrical conductivity and high temperature resistant ablative.
In this patent, we are referred to as the A.C. contactor body for the structure that can realize basic A.C. contactor function in the prior art.
In the practical work process of reality; when work; described A.C. contactor can be realized the action of opening circuit under the instruction of control appliance; when being short-circuited; the action of thermal relay protection is untimely; cause contactor in time not disconnect or Electronic Protection equipment when not possessing the self-lock protection function of short trouble; the A.C. contactor body can be carried out the instruction adhesive of control appliance usually; cause device damage or breaking out of fire; and such A.C. contactor body accident that is short-circuited produces the action of opening circuit; only seen the result who opens circuit to those skilled in the art, but and do not know the reason that opens circuit also can cause puzzlement to the maintenance personal for this reason.
Based on above-mentioned defective, the utility model creator is through research and practice have obtained this creation finally for a long time.
The utility model content
The purpose of this utility model is to provide a kind of A.C. contactor with electronic short circuit self-locking function, in order to overcome above-mentioned defective.
For achieving the above object, the technical solution adopted in the utility model is, a kind of A.C. contactor with electronic short circuit self-locking function is provided, and it comprises: an A.C. contactor body, described A.C. contactor body comprises: a housing, described enclosure interior are provided with a short circuit from the lock section;
Described short circuit comprises from the lock section:
One current acquisition unit is in order to gather the current signal of phase line;
One short-circuit detecting unit obtains the voltage signal that characterizes described current signal, and compares with a reference signal, exports a short circuit detection signal when being short-circuited;
One short circuit self-locking performance element obtains described short circuit detection signal and triggers described A.C. contactor body generation and keep opening circuit action;
One self-locking releasing unit, with so that described interchange letter contactor body remove self-locking and reset.
Preferable, described A.C. contactor body also comprises:
One electromagnetic motion unit;
Many group break-make structures, every group of corresponding circuit of described break-make structure, it comprises:
Two static contacts and a movable contact spring, wherein, described two static contacts are connected with phase line respectively;
Described movable contact spring, it is corresponding with described two static contacts, and is connected with the electromagnetic motion unit, and under "on" position, described electromagnetic motion unit drives described movable contact spring and contacts with described two static contacts, thereby realizes the closure of place circuit.
Wherein, described electromagnetic motion unit, it comprises: an electromagnet, a back-moving spring, a moving iron core and a control switch, wherein,
Described moving iron core is connected with described movable contact spring;
Described control switch is a normally closed switch, and itself and described magnet spool and phase line circuit form the closed-loop path;
When described back-moving spring loses magnetism at described electromagnet, described moving iron core is resetted, and then described movable contact spring is separated with static contact.
Wherein, described current acquisition unit has two kinds of execution modes, and one of them comprises:
At least be arranged on a current transformer on the phase line;
Current rectifying and wave filtering circuit, it is connected with the output of described current transformer, in order to it is processed into the voltage signal that characterizes described current signal.
Wherein two, described current acquisition unit comprises:
Be separately positioned on a copper-manganese sheet on the phase line;
Current rectifying and wave filtering circuit, its two ends with described copper-manganese sheet are connected, in order to it is processed into the voltage signal that characterizes described current value.
Wherein, described short-circuit detecting unit comprises:
One power circuit, it obtains voltage signal from least one phase alignment circuit, and through over commutation, filtering, voltage stabilizing and voltage division processing, thereby the out-put supply signal;
At least one comparator, one input end is connected with described rectification filter circuit output end, obtain the voltage signal of described sign current signal, the one reference edge is connected with described power circuit, obtain described power supply signal, the output of described comparator is exported described short circuit detection signal.
Wherein, described short circuit self-locking performance element comprises:
One triggers components and parts, produces a trigger action after obtaining described short circuit detection signal, and it produces interaction relation with described control switch, and when short circuit took place, described triggering components and parts moved and make described control switch disconnection;
One diode, it is arranged between the output and input of described comparator, makes it keep the current potential of output when producing described short circuit detection signal.
Wherein, described self-locking releasing unit comprises:
One reset switch;
One diode that is connected with described comparator input terminal, it is by described reset switch ground connection.
Preferable, also comprise: an indicating member, it is connected with described short-circuit detecting unit, in order to receive described short circuit detection signal, the phase line that is short-circuited is indicated.
Preferable, described indicating member comprises: at least one light-emitting diode, it is arranged between described comparator output terminal and the described triggering components and parts.
Preferable, described triggering components and parts are relay.
The beneficial effects of the utility model are compared with the prior art, can produce self-locking action when being short-circuited fault, could realize release thereby have only by artificial mode, and the safety of the electricity consumption that finally reaches has indicative function to short trouble simultaneously.
Description of drawings
Fig. 1 is the functional block diagram that the utlity model has the A.C. contactor of electronic short circuit self-locking function;
Fig. 2 is the A.C. contactor one embodiment master's cross-sectional schematic that the utlity model has electronic short circuit self-locking function;
Fig. 3 is the A.C. contactor one embodiment sectional structure schematic diagram that the utlity model has electronic short circuit self-locking function;
Fig. 4 is the A.C. contactor one embodiment perspective view that the utlity model has electronic short circuit self-locking function;
Fig. 5 is the A.C. contactor one embodiment electrical block diagram that the utlity model has electronic short circuit self-locking function.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the utility model is above-mentioned.
Seeing also Fig. 1 is the functional block diagram that the utlity model has the A.C. contactor of electronic short circuit self-locking function; Described A.C. contactor with electronic short circuit self-locking function comprises: an A.C. contactor body,
Described A.C. contactor body a comprises: a housing, described enclosure interior are provided with a short circuit from the lock section; Wherein, described A.C. contactor body is exactly in order to realize the structure of the on-off function that A.C. contactor is basic.
Described short circuit comprises from the lock section:
One current acquisition unit b, it is arranged on described phase line A, B, the C, and it is in order to gather the current signal on place phase line A, B, the C;
One short-circuit detecting unit c, it is connected with described current acquisition unit b, in order to obtaining the voltage signal of described sign current signal, and compares with a reference signal, exports a short circuit detection signal when being short-circuited;
One short circuit self-locking performance element d obtains described short circuit detection signal and triggers described A.C. contactor body a generation and keep opening circuit action, is about to described A.C. contactor body a and is in off state;
One self-locking releasing unit e, with so that described interchange letter contactor body a removes self-locking and resets, resetting of indication is meant that described A.C. contactor can closedly realize current lead-through (principle is seen shown in Figure 2) here.
See also shown in Figure 2ly, it is the A.C. contactor one embodiment master's cross-sectional schematic that the utlity model has electronic short circuit self-locking function.Main idea of the present utility model is, by the improvement to existing A.C. contactor, makes it reach new safety standard.Described housing comprises loam cake 10 and base 11, wherein in described housing, comprise: an electromagnetic motion unit, in order to produce the electromagnetism action in the electric power conducting state, described electromagnetic motion unit, it comprises: an electromagnet 243, one back-moving spring, 241, one a moving iron core 242 and a control switch (not shown), wherein, described moving iron core 242 is connected with described movable contact spring 21; Described control switch is a normally closed switch, and the coil of itself and described electromagnet 243 and phase line A circuit form closed-loop path (referring to Fig. 5); Promptly as long as have electric current to flow through on the circuit at A.C. contactor body place, described electromagnet 243 just can draw down described moving iron core 242, thereby makes described back-moving spring 241 be in compressive state.When described back-moving spring 241 loses magnetism at described electromagnet 243, described moving iron core 242 is upwards resetted.
Many group break-make structures, here adopt three groups, every group of corresponding circuit A (phase line) of described break-make structure wherein, each described on off mechanism comprises: two static contacts and a movable contact spring 21, wherein, described two static contacts are connected with outlet metallic conduction sheet (opposite side) with an inlet wire metallic conduction sheet 23 respectively, are provided with the current transformer 4 of current acquisition unit correspondence thereon; Wherein, described inlet wire metallic conduction sheet 23 is connected with phase line A respectively with outlet metallic conduction sheet; Also be provided with arc-extinguish chamber 22, in order to prevent that arc light that the A.C. contactor body produces in conducting or when disconnecting is to the element on the circuit or contact point produces infringement.
Described movable contact spring 21, it is corresponding with described two static contacts, and is connected with moving iron core 242 in the described electromagnetic motion unit, under "on" position, described moving iron core 242 drives described movable contact spring 21 and contacts with described two static contacts, thereby realizes the closure of place circuit.
Shown in Figure 3, it is respectively the A.C. contactor embodiment sectional structure schematic diagram that the utlity model has electronic short circuit self-locking function; Be provided with a control circuit board 3 in described housing, described control circuit board 3 is provided with relay 32, and has the reset switch 31 of described self-locking releasing unit correspondence; Described control switch 31 is provided with external control line 33, and is connected with described current transformer 4, and housing is provided with reset hole 201, and the external control line enters hole 30 (referring to Fig. 4).
Seeing also shown in Figure 5 its is the A.C. contactor embodiment electrical block diagram that the utlity model has electronic short circuit self-locking function.Described current acquisition unit comprises: be separately positioned on current transformer Ta, Tb, a Tc (4) on the phase line; Because present embodiment requires three phase line A, B, each bar of C all detects, therefore be provided with three current transformer Ta here, Tb, Tc (4), one current rectifying and wave filtering circuit, itself and described current transformer Ta, Tb, the output of Tc (4) is connected, in order to it is processed into the voltage signal of a sign current signal (at current value here), described current rectifying and wave filtering circuit comprises: be arranged at respectively at current transformer Ta, Tb, rectifier diode D4 behind the Tc (4), D5, D6 is in order to the capacitor C 4-C9 that carries out filtering and in order to carry out divider resistance R1-R6.Present embodiment is to be example with the current transformer; but be not limited to this mode at acquisition geometry of the present utility model; as long as can gather the current signal on phase line A, B, the C; and be converted to the scope that voltage signal all should belong to protection, replace current transformer Ta, Tb, Tc (4) as adopting the copper-manganese sheet.
Described short-circuit detecting unit comprises:
One power circuit, it obtains voltage signal from least one phase alignment circuit, and through over commutation, filtering, voltage stabilizing and voltage division processing, thereby out-put supply signal, in order to prevent that the wherein a certain phase line from breaking down, and power supply signal can't be provided, on three phase line A, B, C, obtain power supply signal respectively in the present embodiment for this reason, it comprises: be arranged at respectively at phase line A, B, C collection terminal rectifier diode D1, D2, D3, in order to the capacitor C 1 of carrying out filtering, C2, C3, in order to carry out divider resistance R7, R8 and voltage stabilizing didoe DW1.Also comprise: in order to adjust the components and parts of fiducial value, that adopt here is transformation resistor w, and described fiducial value is adjusted as required.
At least one comparator, one input end is connected with described rectification filter circuit output end, obtain the voltage signal of described sign current signal, the one reference edge is connected with described power circuit, obtain described power supply signal, preferable employing transformation resistor w adjusts fiducial value, and the output of described comparator is exported described short circuit detection signal when circuit takes place (when the voltage signal of described input is higher than described reference signal); In order to monitor each phase line A, B, C short trouble, be provided with three comparator IC1-1, IC1-2, IC1-3.
Described short circuit self-locking performance element comprises:
One triggers components and parts, produce a trigger action after obtaining described short circuit detection signal, itself and described control switch produce interaction relation, when short circuit takes place, described triggering components and parts action disconnects described control switch, and what adopt here is relay J (32);
A plurality of diode D8, D10, D12, it is arranged between the output and input of described comparator IC1-1, IC1-2, IC1-3, the quantity of diode and the quantity of comparator are consistent, after producing described short circuit detection signal, make it keep the current potential of output, thereby the realization auto-lock function, promptly in time external control signal requires combined floodgate also can not produce the homing action of conducting.
Described self-locking releasing unit comprises:
One reset switch REST;
With diode D7, D9, the D11 that described comparator IC1-1, IC1-2, IC1-3 input are connected, it is by described reset switch REST ground connection.
Also comprise: an indicating member, it is connected with described short-circuit detecting unit, in order to receive described short circuit detection signal, the phase line that is short-circuited is indicated.
Described indicating member comprises: at least one light-emitting diode, it is arranged between described comparator IC1-1, IC1-2, IC1-3 output and the described relay J, and present embodiment has adopted three LED a, LEDb, LEDc to indicate the short circuit of each phase line to move respectively.
The above only is preferred embodiment of the present utility model, only is illustrative for the utility model, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that the utility model claim is limited, revise, even equivalence, but all will fall in the protection range of the present utility model.
Claims (11)
1. A.C. contactor with electronic short circuit self-locking function, it comprises: an A.C. contactor body, it is characterized in that,
Described A.C. contactor body comprises: a housing, described enclosure interior are provided with a short circuit from the lock section;
Described short circuit comprises from the lock section:
One current acquisition unit is in order to gather the current signal of phase line;
One short-circuit detecting unit obtains the voltage signal that characterizes described current signal, and compares with a reference signal, exports a short circuit detection signal when being short-circuited;
One short circuit self-locking performance element obtains described short circuit detection signal and triggers described A.C. contactor body generation and keep opening circuit action;
One self-locking releasing unit, with so that described interchange letter contactor body remove self-locking and reset.
2. the A.C. contactor with electronic short circuit self-locking function according to claim 1 is characterized in that, described A.C. contactor body also comprises:
One electromagnetic motion unit;
Many group break-make structures, every group of corresponding circuit of described break-make structure, it comprises:
Two static contacts and a movable contact spring, wherein, described two static contacts are connected with phase line respectively;
Described movable contact spring, it is corresponding with described two static contacts, and is connected with the electromagnetic motion unit, and under "on" position, described electromagnetic motion unit drives described movable contact spring and contacts with described two static contacts, thereby realizes the closure of place circuit.
3. the A.C. contactor with electronic short circuit self-locking function according to claim 2 is characterized in that, described electromagnetic motion unit, and it comprises: an electromagnet, a back-moving spring, a moving iron core and a control switch, wherein,
Described moving iron core is connected with described movable contact spring;
Described control switch is a normally closed switch, and itself and described magnet spool and phase line circuit form the closed-loop path;
When described back-moving spring loses magnetism at described electromagnet, described moving iron core is resetted, and then described movable contact spring is separated with static contact.
4. the A.C. contactor with electronic short circuit self-locking function according to claim 3 is characterized in that, described current acquisition unit comprises:
At least be arranged on a current transformer on the phase line;
Current rectifying and wave filtering circuit, it is connected with the output of described current transformer, in order to it is processed into the voltage signal that characterizes described current signal.
5. the A.C. contactor with electronic short circuit self-locking function according to claim 3 is characterized in that, described current acquisition unit comprises:
Be separately positioned on a copper-manganese sheet on the phase line;
Current rectifying and wave filtering circuit, its two ends with described copper-manganese sheet are connected, in order to it is processed into the voltage signal that characterizes described current value.
6. according to claim 4 or 5 described A.C. contactors, it is characterized in that described short-circuit detecting unit comprises with electronic short circuit self-locking function:
One power circuit, it obtains voltage signal from least one phase alignment circuit, and through over commutation, filtering, voltage stabilizing and voltage division processing, thereby the out-put supply signal;
At least one comparator, one input end is connected with described rectification filter circuit output end, obtain the voltage signal of described sign current signal, the one reference edge is connected with described power circuit, obtain described power supply signal, the output of described comparator is exported described short circuit detection signal.
7. the A.C. contactor with electronic short circuit self-locking function according to claim 6 is characterized in that, described short circuit self-locking performance element comprises:
One triggers components and parts, produces a trigger action after obtaining described short circuit detection signal, and it produces interaction relation with described control switch, and when short circuit took place, described triggering components and parts moved and make described control switch disconnection;
One diode, it is arranged between the output and input of described comparator, makes it keep the current potential of output when producing described short circuit detection signal.
8. the A.C. contactor with electronic short circuit self-locking function according to claim 6 is characterized in that, described self-locking releasing unit comprises:
One reset switch;
One diode that is connected with described comparator input terminal, it is by described reset switch ground connection.
9. the A.C. contactor with electronic short circuit self-locking function according to claim 8, it is characterized in that, also comprise: an indicating member, it is connected with described short-circuit detecting unit, in order to receive described short circuit detection signal, the phase line that is short-circuited is indicated.
10. the A.C. contactor with electronic short circuit self-locking function according to claim 9 is characterized in that, described indicating member comprises: at least one light-emitting diode, it is arranged between described comparator output terminal and the described triggering components and parts.
11. the A.C. contactor with electronic short circuit self-locking function according to claim 10 is characterized in that, described triggering components and parts are relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201322870U CN201804797U (en) | 2010-02-10 | 2010-02-10 | AC contactor with electronic type short circuit self-locking function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201322870U CN201804797U (en) | 2010-02-10 | 2010-02-10 | AC contactor with electronic type short circuit self-locking function |
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| CN201804797U true CN201804797U (en) | 2011-04-20 |
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| CN2010201322870U Expired - Fee Related CN201804797U (en) | 2010-02-10 | 2010-02-10 | AC contactor with electronic type short circuit self-locking function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789333A (en) * | 2010-02-10 | 2010-07-28 | 湖北盛佳电器设备有限公司 | Alternating current contactor with electronic short circuit self-locking function |
| CN102412098A (en) * | 2011-09-23 | 2012-04-11 | 张汉全 | Energy-saving alternating-current contactor with fault clearing lock |
| CN103427810A (en) * | 2013-08-07 | 2013-12-04 | 深圳清华大学研究院 | Signal generator circuit |
| CN113937735A (en) * | 2021-10-26 | 2022-01-14 | 傲普(上海)新能源有限公司 | Pre-charging, over-voltage and over-current protection circuit and method for battery module |
-
2010
- 2010-02-10 CN CN2010201322870U patent/CN201804797U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789333A (en) * | 2010-02-10 | 2010-07-28 | 湖北盛佳电器设备有限公司 | Alternating current contactor with electronic short circuit self-locking function |
| CN102412098A (en) * | 2011-09-23 | 2012-04-11 | 张汉全 | Energy-saving alternating-current contactor with fault clearing lock |
| CN103427810A (en) * | 2013-08-07 | 2013-12-04 | 深圳清华大学研究院 | Signal generator circuit |
| CN103427810B (en) * | 2013-08-07 | 2016-06-08 | 深圳清华大学研究院 | Signal generator circuit |
| CN113937735A (en) * | 2021-10-26 | 2022-01-14 | 傲普(上海)新能源有限公司 | Pre-charging, over-voltage and over-current protection circuit and method for battery module |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20160210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |