CN202475336U - Contactless reversing contactor - Google Patents
Contactless reversing contactor Download PDFInfo
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- CN202475336U CN202475336U CN2012200954707U CN201220095470U CN202475336U CN 202475336 U CN202475336 U CN 202475336U CN 2012200954707 U CN2012200954707 U CN 2012200954707U CN 201220095470 U CN201220095470 U CN 201220095470U CN 202475336 U CN202475336 U CN 202475336U
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Abstract
The utility model discloses a contactless reversing contactor, which belongs to the technical field of motor control and comprises three-phase power supplies A1, B1 and C1 for an input end, and three-phase power supplies A2, B2 and C2 for an output end, as well as a positive thyristor set and a reverse thyristor set. The contactless reversing contactor is characterized by further comprising a single-chip unit and an interlock module with a software or/and hardware form; and the single-chip unit is used for controlling the connection/disconnection of the positive thyristor set and the reverse thyristor set via the interlock module and enabling the two thyristor sets to be in different connection/disconnection states. According to the utility model, the single-chip unit is adopted, so as to improve the control precision; the connection/disconnection of the positive thyristor set and the reverse thyristor set via the interlock module is controlled via the single-chip unit, thereby achieving interlock connection/disconnection control to the positive thyristor set and the reverse thyristor set and avoiding a phase short-circuit failure is generated due to the synchronous connection of the positive thyristor set and the reverse thyristor set.
Description
Technical field
The utility model belongs to the electric machines control technology field, is specifically related to a kind of contactless commutation contactor.
Background technology
Along with the fast development of process of industrialization, the output and the production efficiency of industrial products increase substantially, and the switching frequency of common contactor and reliability can't satisfy the demand of modern production flow process, its problem and shortage mainly show following some:
1, the mechanical contact of common contactor is difficult to satisfy the requirement of switching frequency; And along with the rising of switching frequency, reduce its useful life significantly, causes the production equipment fault; Continuity and production efficiency that influence is produced, and as easy as rolling off a log raising product percent defective.
2, because switching frequency is too high, cause the iron core of common contactor and the accelerated wear test of contact, cause that the start-stop time progressively changes, cause the location changing, the stability of final influence production.
3, need the higher and frequent place of commutating of switching frequency at some, common contactor failure rate is higher, even can't use at all.
Problem and defective based on above common contactor existence; People have developed a kind of contactless commutation contactor based on thyristor, replace above-mentioned common contactor by thyristor, have solved common contactor produces spark in the process of disconnection and closure problem; Satisfied the demand of modern production simultaneously to switching frequency; But in practical application, can not control accurately, bring a series of problems such as phase fault each thyristor; Cause the contactless commutation contactor not by extensive employing, still rest on the common contactor stage mostly.
Summary of the invention
The utility model technical problem to be solved provides a kind of contactless commutation contactor, can control thyristor accurately and commutate.
For solving the problems of the technologies described above; The technical scheme of the utility model is: design a kind of contactless commutation contactor; The three phase mains A1, B1, the C1 that comprise input; The three phase mains A2 of output, B2, C2, and forward thyristor groups and reverse thyristor groups, the forward thyristor groups is connected three phase mains A1A2, B1B2, the C1C2 of input and output by phase sequence in order; Reverse thyristor groups is connected three phase mains A1C2, B1B2, the C1A2 of input and output by anti-time phase sequence; It is characterized in that: also comprise single machine unit and software or/and the interlocking module of example, in hardware, single machine unit is through the break-make of interlocking module control forward thyristor groups and reverse thyristor groups, and makes forward thyristor groups and reverse thyristor groups not be in conducting state simultaneously.
Preferably, interlocking module is an interlock circuit, and interlock circuit comprises electronic switch, and single machine unit control connects the control utmost point of electronic switch, and electronic switch control connects forward thyristor groups and reverse thyristor groups.
Preferably, electronic switch is first electronic switch and second electronic switch, the break-make of first electronic switch control forward thyristor groups, and second electronic switch is controlled the break-make of reverse thyristor groups.
Preferably, first electronic switch is a NPN type triode, and second electronic switch is the positive-negative-positive triode, and the same control port of the base stage of NPN type triode and the base stage of positive-negative-positive triode and single machine unit links.
Preferably; Also comprise the control signal treatment circuit; Forward signal unit and reverse signal unit are set in the control signal treatment circuit, and the forward signal unit is that single machine unit provides the forward control signal, and the reverse signal unit is that single machine unit provides reverse control signal.
Preferably, rectifier bridge and level translator are set in the forward and reverse signal element, rectifier bridge is that level translator provides analog voltage signal, and level translator converts analog voltage signal to Transistor-Transistor Logic level and passes to single machine unit; Level translator is selected photoisolator for use.
Preferably; Also comprise zero-cross triggering circuit; Zero-cross triggering circuit detects the phase voltage zero crossing of A1C2, B1B2, C1A2 in A1A2 in the phase sequence in order, B1B2, C1C2 and the anti-time phase sequence, and zero-cross triggering circuit is arranged in the thyristor conducting and the shutoff of forward thyristor groups on the corresponding phase line or reverse thyristor groups according to each phase voltage crossover point signal control.
Preferably; Zero-cross triggering circuit is provided with six zero cross fired special photoelectric coupler OC1, OC2, OC3, OC4, OC5 and OC6; Wherein: an end that be connected on first electronic switch after the input of zero cross fired special photoelectric coupler OC1, OC2 and OC3 is connected in series mutually, output is connected in thyristor among phase line A1A2, B1B2, the C1C2 respectively, an end that be connected on second electronic switch after the input of zero cross fired special photoelectric coupler OC4, OC5, OC6 is connected in series mutually, output is connected in thyristor among phase line A1C2, B1B2, the C1A2 respectively.
Preferably, also comprise open-phase protection circuit, an end of open-phase protection circuit is connected among the A1, B1, C1 electric power loop of input, the other end connects single machine unit, in order to the signal of telecommunication that detects input A1, B1, C1 power supply and pass to single machine unit.
Preferably; Open-phase protection circuit comprises three phase shortage detecting units that connect each single phase poaer supply among input three phase mains A1, B1, the C1 successively; The optocoupler and second rectifier bridge are set in the phase shortage detecting unit; The input of second rectifier bridge connects the single phase poaer supply that is detected, and second rectifier bridge is that the input of optocoupler provides power supply, and the output of optocoupler connects single machine unit.
Preferably, also comprise display unit and RC power module, display unit electrically connects single machine unit, in order to show the operating state of contactless commutation contactor; The RC power module is that single machine unit, control signal generating unit, interlock circuit, zero-cross triggering circuit and open-phase protection circuit provide DC power supply.
Compared with prior art, the beneficial effect of the utility model is:
1, single machine unit has improved computing, the processing speed of signal, because single machine unit adopts digital processing technology, can send control command accurately decidedly according to the control signal of being gathered simultaneously, has improved control precision; Single machine unit is through the break-make of interlocking module control forward thyristor groups and reverse thyristor groups; Realized interlocking capability conducting control, avoided forward thyristor groups and the reverse thyristor groups phase fault that conducting brought simultaneously forward thyristor groups and reverse thyristor groups.
2, interlocking module adopts the hardware interlock circuit of first electronic switch and the second electronic switch structure, and is simple in structure, stable performance; First electronic switch is selected NPN type triode for use; Second electronic switch is selected the positive-negative-positive triode for use; And the same control port of the base stage of NPN type triode and the base stage of positive-negative-positive triode and single machine unit links; Simplify the structure of interlock circuit, and utilized opposite this characteristic of work polarity of NPN type triode and positive-negative-positive triode, realized reliable interlock function.
3, the control signal treatment circuit is that single machine unit provides control signal, and convenient common staff's operation has reduced the requirement to operating personnel, has simplified the mode that provides of control signal simultaneously, has improved the stability of system.
4, owing to adopted rectifier bridge in the forward and reverse signal element; Can make control power supply AC/DC universal; And widened control power source voltage scope, making DC control supply is 12-36V, and ac control power supply is 180V-450V; The power taking of convenient working site control power supply has overcome in the prior art the single defective of control power requirement.
5, level translator is selected photoisolator for use, can remove the common mode disturbances in the signal after the rectification, makes system have stronger antijamming capability.
6, zero-cross triggering circuit makes thyristor conducting and the shutoff when this phase voltage zero crossing in each phase line, and it is sinusoidal wave making load current, has reduced the interference to electrical network, has prolonged the useful life of power consumption equipment simultaneously.
7, zero-cross triggering circuit adopts zero cross fired special photoelectric coupler to realize the zero cross fired function, and zero cross fired special photoelectric coupler technologies is ripe, and stable performance can make zero-cross triggering circuit control each thyristor reliably and realize zero crossing conducting and shutoff.
8, the signal of telecommunication of each phase line in the detection input three phase mains that open-phase protection circuit can be real-time; And pass to single machine unit; When power supply generation phase shortage, single machine unit is turn-offed control signal output, makes forward thyristor groups and reverse all not conductings of thyristor groups; Cut off the power supply output of this contactless commutation contactor, the drawback of having avoided power consumption equipment to be burnt because of phase shortage.
9, phase shortage detects and realizes that by the optocoupler and second rectifier bridge circuit structure is simple, has reduced the quantity of fault point, and stable performance, reliable all belongs to the conventional electrical device, has lowered the hardware cost of system.
10, adopt display unit to show the operating state of contactless commutation contactor intuitively, the staff is come into plain view to the operating state of system, make the contactless commutation contactor humanized, increase its practicality.
11, be that single machine unit, control signal generating unit, interlock circuit, zero-cross triggering circuit and open-phase protection circuit provide DC power supply by the RC power module; Making this contactless contactor only need to connect civil power in use gets final product; Convenient; And unify power supply, further improve the stability of its work.
Description of drawings
Fig. 1 is the structured flowchart of the utility model;
Fig. 2 is the electrical schematic diagram of control signal treatment circuit;
Fig. 3 is interlock circuit and display unit electrical schematic diagram;
Fig. 4 is the electrical schematic diagram of zero-cross triggering circuit;
Fig. 5 is the electrical schematic diagram of open-phase protection circuit.
Mark among the figure:
1, control signal treatment circuit; 11, first rectifier bridge; 12, photoisolator; 2, single machine unit;
3, interlock circuit; 4, zero-cross triggering circuit; 5, open-phase protection circuit; 51, second rectifier bridge; 52, optocoupler;
6, forward thyristor groups; 7, reverse thyristor groups; 8, RC power module; 9, display unit.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.
Like Fig. 1, shown in 4; Three phase mains with input in the utility model is labeled as A1, B1 and C1 respectively; The three phase mains of output is labeled as A2, B2 and C2 respectively, and is provided with five thyristor module SCR1, SCR2, SCR3, SCR4 and SCR5 that can control the conducting of alternating current all-wave altogether.Wherein, SCR1 is connected in the A1A2 phase line of three phase mains, and SCR2 is connected in the B1B2 phase line of three phase mains; SCR3 is connected in the C1C2 phase line of three phase mains, and SCR4 is connected in the A1C2 phase line of three phase mains, and SCR5 is connected in the C1A2 phase line of three phase mains; When thyristor module SCR1, SCR2 and SCR3 conducting; The phase sequence of the three phase mains of output is A1, B1 and C1, and is consistent with input, and the power supply of forward phase sequence can be provided for motor; Motor just changes, and thyristor module SCR1, SCR2 and SCR3 constitute forward thyristor groups 6; When thyristor module SCR4, SCR2 and SCR5 conducting; The phase sequence of the three phase mains of output is C1, B1 and A1, and is opposite with input, and the power supply of reverse phase sequence can be provided for the electricity consumption motor; The motor counter-rotating, thyristor module SCR4, SCR2 and SCR5 constitute reverse thyristor groups 7.
In the utility model, the conducting of forward thyristor groups 6 and reverse thyristor groups 7 with turn-off by single machine unit 2 unified controls, control signal treatment circuit 1 provides control signal for single machine unit 2.As shown in Figure 2; Structure, function identical forward signal unit and reverse signal unit are set in the control signal treatment circuit 1; First rectifier bridge 11 and photoisolator 12 is set in the forward signal unit; First rectifier bridge 11 is for the input of photoisolator 12 provides working power, and photoisolator 12 converts the analog voltage signal of first rectifier bridge 11 to Transistor-Transistor Logic level and passes to single machine unit 2.Meanwhile, the signal after 12 pairs of rectifications of photoisolator has carried out the photoelectricity isolation, has removed common mode disturbances, makes system have stronger antijamming capability.The forward signal unit connects the port F of single machine unit 2, and the reverse signal unit connects the port R of single machine unit 2.Single machine unit 2 is sent the instruction that starts or stop just to change according to the variation of level among the port F, sends the instruction that starts or stop to reverse according to the variation of level among the port R.During use, control the input that power supply connects first rectifier bridge 11 in the forward and reverse signal element respectively with just changeing the control power supply with counter-rotating, because the use of first rectifier bridge 11; Can make the control power supply both can adopt alternating current also can adopt direct current; And the direct voltage scope is 12V～36V, and the alternating voltage scope is 180V-450V, has widened voltage range; The power taking of convenient working site control power supply has overcome in the prior art the single defective of control power requirement.Also adopt resistance R 1 capacitor C 1, resistance R 3 capacitor C 2 to form double integration circuits, remove various spikes effectively and disturb,, strengthened the reliability of system to adapt to on-the-spot various complex electromagnetic environments.
Cause input power supply phase fault for fear of forward thyristor groups 6 and reverse thyristor groups 7 conductings simultaneously; The control signal of single machine unit 2 is passed to the control end of forward thyristor groups 6 and reverse thyristor groups 7 through interlocking module, and interlocking module can adopt the interlock circuit of example, in hardware.As shown in Figure 3; NPN type triode T1 is set as first electronic switch in the interlock circuit 3; Positive-negative-positive triode T2 is as second electronic switch; The base stage of NPN type triode T1 and the base stage of positive-negative-positive triode T2 and the same control port of single machine unit 2 link, the break-make of NPN type triode T1 control forward thyristor groups 6, and positive-negative-positive triode T2 controls the break-make of reverse thyristor groups 7.During work; After 2 pairs of control signals of single machine unit are carried out logical process; By corresponding high level or the low level signal of output control pin output; Through the base stage of current-limiting resistance control NPN type triode T1 and positive-negative-positive triode T2, make the operating state that forward thyristor groups 6 and reverse thyristor groups 7 have only one of them to be in conducting at one time, can not both while conductings; Because NPN type triode T1 has only the conducting of high level ability; And positive-negative-positive triode T2 has only the conducting of low level ability; Both have constituted reliable hardware interlock; Avoided the generation of the phase fault that conducting brought simultaneously of forward and reverse thyristor groups 7 effectively, the functional reliability of contactless commutation contactor is greatly improved.
The first above-mentioned electronic switch and second electronic switch also can adopt N raceway groove isolated gate FET and P raceway groove isolated gate FET and the opposite polarity semiconductor device of similarly working, and constitute interlock circuit 3.In addition, first electronic switch and second electronic switch can also adopt the photoisolator form.
The quantity of the electronic switch in the interlock circuit 3 also can be five or ten, and promptly each thyristor module correspondence is controlled by one or two electronic switch.
Interlocking module also can adopt the interlocking program form; Single machine unit 2 is controlled the state of its control port through operation interlocking program; A kind of control signal output in realizing only allowing to rotate and reverse; When the rotating control signal while of single machine unit 2 inputs was effective, single machine unit 2 was exported closing control.
Each thyristor conducting or shutoff when belonging to the phase voltage zero passage of phase line in order to make forward and reverse thyristor groups 7 reduce the rush of current of power supply to power consumption equipment, between interlock circuit 3 and forward and reverse thyristor groups 7, are provided with zero-cross triggering circuit 4.As shown in Figure 4; Zero-cross triggering circuit 4 comprises six built-in zero cross fired special photoelectric coupler OC1, OC2, OC3, OC4, OC5 and OC6 of zero cross detection circuit; Wherein: be connected in after the input of zero cross fired special photoelectric coupler OC1, OC2 and OC3 is connected in series mutually on the NPN type triode T1; Zero cross fired special photoelectric coupler OC1 output connects the end and the control utmost point of thyristor module SCR1; Zero cross fired special photoelectric coupler OC2 output connects the end and the control utmost point of thyristor module SCR2, and zero cross fired special photoelectric coupler OC3 output connects the end and the control utmost point of thyristor module SCR3; And the input of zero cross fired special photoelectric coupler OC4, OC5 and OC6 is connected on the positive-negative-positive triode T2 after being connected in series mutually; Zero cross fired special photoelectric coupler OC4 output connects the end and the control utmost point of thyristor module SCR2; Zero cross fired special photoelectric coupler OC5 output connects the end and the control utmost point of thyristor module SCR5, and zero cross fired special photoelectric coupler OC6 output connects the end and the control utmost point of thyristor module SCR4.During work; Because zero cross fired special photoelectric coupler OC1, OC2, OC3, OC4, OC5 and OC6 are zero cross fired; So the conducting of its output device will be deferred near the friendship more of AC sine wave point of zero voltage constantly, trigger the thyristor conducting parallelly connected with it simultaneously, electric current is just flow through in load.When single machine unit 2 is sent stop signal; Thyristor arrives near the just shutoff of friendship at zero point until the phase voltage of place phase line, and load current just stops, and it is sinusoidal wave making load current; Reduced interference, prolonged the useful life of power consumption equipment simultaneously electrical network.
In order further to protect contactless contactor and load motor, increased open-phase protection circuit 5 in the utility model, as shown in Figure 5; Open-phase protection circuit 5 comprises three phase shortage detecting units that are connected in respectively in the input three phase mains, and the input that optocoupler 52 and second rectifier bridge, 51, the second rectifier bridges 51 are set in the phase shortage detecting unit connects the single phase poaer supply that is detected; Second rectifier bridge 51 provides power supply for the input of optocoupler 52; The output of optocoupler 52 connects single machine unit 2, and such three phase shortage detecting units connect three different ports of single machine unit 2 respectively, and perhaps the output of optocoupler 52 connects a port of single machine unit 2 in three phase shortage detecting units through AND circuit; As long as the output level generation saltus step of an optocoupler 52 is arranged; After single machine unit 2 detected saltus step, single machine unit 2 can be closed zero-cross triggering circuit 4 at once, made forward thyristor groups 6 and reverse thyristor groups 7 all be in off state; Cut off the output end power of contactless commutation contactor; Stop the running of load motor, the drawback of having avoided load motor to be burnt because of phase shortage has further improved the reliability of contactless commutation contactor.
The staff understands the operating state of the utility model for ease; Also be provided with display unit 9; Display unit 9 electrically connects single machine unit 2; In order to show the operating state of contactless commutation contactor, display unit 9 can be easy double-colored light-emitting diodes form of tubes, and being in order to simple demonstration the utility model just changes or the counter-rotating operating state; Also can be liquid crystal display screen display mode, in order to show the operation information of single machine unit 2 intuitively than higher-end.
In order stable working power to be provided for each circuit in the utility model; Also built-in RC power module 8 in the utility model has passed through capacitance-resistance filter, can the galvanic current source be provided for single machine unit 2, control signal treatment circuit 1, interlock circuit 3, zero-cross triggering circuit 4 and open-phase protection circuit 5; Making this contactless contactor only need to connect civil power in use gets final product; Convenient, and unify power supply, further improve the stability of its work.
During use; Connecting is just changeing control power supply or counter-rotating control power supply, at first gets into control signal treatment circuit 1, the just commentaries on classics of input or counter-rotating control power supply signal is carried out rectification, current limliting, filtering, photoelectricity are isolated, the RC biproduct is graded processing; The signal that disposes has extremely strong anti-spike to be disturbed and the common mode interference capability; Remove various interference signals and get in the single machine unit 2, carry out corresponding logic analysis and processing, output to the interlock process that interlock circuit 3 carries out hardware by single machine unit 2; Signal after the processing triggers corresponding zero cross fired special photoelectric coupler through NPN type triode T1 or positive-negative-positive triode T2; Conducting or close corresponding thyristor, forward thyristor groups 6 or reverse thyristor groups 7 are conducting state or closed condition, are shown the state of output simultaneously by display unit 9.And when the control signal of rotating all existed owing to the control system error, single machine unit 2 was exported closing control.Owing to the use of zero-cross triggering circuit 4, it is sinusoidal wave making load current, has reduced the interference to electrical network simultaneously.
The contactless commutation contactor is through above-mentioned well-designed; Have switching frequency height, multiple protective, avoid phase fault, avoid because of advantages such as damage that misoperation causes, control power supply AC/DC universal and voltage range are wide; Make it be widely used in Machine-Tool Control, automatic screw machine, overhead traveling crane control cabinet, the fields such as control, lifting control, automatic assembly line of driving a vehicle that all motors need frequent switching-over, and become the best upgraded product of traditional double contactor rotating scheme.
The above; It only is the preferred embodiment of the utility model; Be not to be the restriction of the utility model being made other form, any professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But every the utility model technical scheme content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection range of the utility model technical scheme according to the technical spirit of the utility model.
Claims (10)
1. contactless commutation contactor; The three phase mains A1, B1, the C1 that comprise input; The three phase mains A2 of output, B2, C2; And forward thyristor groups and reverse thyristor groups; The forward thyristor groups is connected three phase mains A1A2, B1B2, the C1C2 of input and output by phase sequence in order, and reverse thyristor groups is characterized in that: also comprise single machine unit and software or/and the interlocking module of example, in hardware by three phase mains A1C2, B1B2, the C1A2 of anti-phase sequence connection input and output; Single machine unit is controlled the break-make of forward thyristor groups and reverse thyristor groups through interlocking module, and makes forward thyristor groups and reverse thyristor groups not be in conducting state simultaneously.
2. according to the described a kind of contactless commutation contactor of claim 1; It is characterized in that: interlocking module is an interlock circuit; Interlock circuit comprises electronic switch, and single machine unit control connects the control utmost point of electronic switch, and electronic switch control connects forward thyristor groups and reverse thyristor groups.
3. according to the described a kind of contactless commutation contactor of claim 2; It is characterized in that: electronic switch is first electronic switch and second electronic switch; The break-make of first electronic switch control forward thyristor groups, second electronic switch is controlled the break-make of reverse thyristor groups.
4. according to the described a kind of contactless commutation contactor of claim 3; It is characterized in that: first electronic switch is a NPN type triode; Second electronic switch is the positive-negative-positive triode, and the same control port of the base stage of NPN type triode and the base stage of positive-negative-positive triode and single machine unit links.
5. according to the described a kind of contactless commutation contactor of claim 1; It is characterized in that: also comprise the control signal treatment circuit; Forward signal unit and reverse signal unit are set in the control signal treatment circuit; The forward signal unit is that single machine unit provides the forward control signal, and the reverse signal unit is that single machine unit provides reverse control signal.
6. according to the described a kind of contactless commutation contactor of claim 5; It is characterized in that: rectifier bridge and level translator are set in the forward and reverse signal element; Rectifier bridge is that level translator provides analog voltage signal, and level translator converts analog voltage signal to Transistor-Transistor Logic level and passes to single machine unit; Level translator is selected photoisolator for use.
7. according to the described a kind of contactless commutation contactor of claim 3; It is characterized in that: also comprise zero-cross triggering circuit; Zero-cross triggering circuit detects the phase voltage zero crossing of A1C2, B1B2, C1A2 in A1A2 in the phase sequence in order, B1B2, C1C2 and the anti-time phase sequence, and zero-cross triggering circuit is arranged in the thyristor conducting and the shutoff of forward thyristor groups on the corresponding phase line or reverse thyristor groups according to each phase voltage crossover point signal control.
8. according to the described a kind of contactless commutation contactor of claim 7; It is characterized in that: zero-cross triggering circuit is provided with six zero cross fired special photoelectric coupler OC1, OC2, OC3, OC4, OC5 and OC6; Wherein: an end that be connected on first electronic switch after the input of zero cross fired special photoelectric coupler OC1, OC2 and OC3 is connected in series mutually, output is connected in thyristor among phase line A1A2, B1B2, the C1C2 respectively, an end that be connected on second electronic switch after the input of zero cross fired special photoelectric coupler OC4, OC5, OC6 is connected in series mutually, output is connected in thyristor among phase line A1C2, B1B2, the C1A2 respectively.
9. according to the described a kind of contactless commutation contactor of the arbitrary claim of claim 1 to 8; It is characterized in that: also comprise open-phase protection circuit; One end of open-phase protection circuit is connected among the A1, B1, C1 electric power loop of input, the other end connects single machine unit, in order to the signal of telecommunication that detects input A1, B1, C1 power supply and pass to single machine unit.
10. according to the described a kind of contactless commutation contactor of claim 9; It is characterized in that: open-phase protection circuit comprises three phase shortage detecting units that connect each single phase poaer supply among input three phase mains A1, B1, the C1 successively; The optocoupler and second rectifier bridge are set in the phase shortage detecting unit; The input of second rectifier bridge connects the single phase poaer supply that is detected, and second rectifier bridge is that the input of optocoupler provides power supply, and the output of optocoupler connects single machine unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200954707U CN202475336U (en) | 2012-03-15 | 2012-03-15 | Contactless reversing contactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200954707U CN202475336U (en) | 2012-03-15 | 2012-03-15 | Contactless reversing contactor |
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| CN202475336U true CN202475336U (en) | 2012-10-03 |
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| CN2012200954707U Expired - Fee Related CN202475336U (en) | 2012-03-15 | 2012-03-15 | Contactless reversing contactor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594226A (en) * | 2012-03-15 | 2012-07-18 | 淄博市临淄银河高技术开发有限公司 | Non-contact reversing contactor |
| CN104871423A (en) * | 2012-12-20 | 2015-08-26 | 西门子公司 | Method for electrically connecting a converter to an electrical machine |
| CN106253267A (en) * | 2016-08-01 | 2016-12-21 | 珠海格力电器股份有限公司 | Supply self adaptation adjusting apparatus and method |
-
2012
- 2012-03-15 CN CN2012200954707U patent/CN202475336U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594226A (en) * | 2012-03-15 | 2012-07-18 | 淄博市临淄银河高技术开发有限公司 | Non-contact reversing contactor |
| CN104871423A (en) * | 2012-12-20 | 2015-08-26 | 西门子公司 | Method for electrically connecting a converter to an electrical machine |
| US9647598B2 (en) | 2012-12-20 | 2017-05-09 | Siemens Aktiengesellschaft | Method for electrically connecting a converter to an electrical machine |
| CN104871423B (en) * | 2012-12-20 | 2017-06-13 | 西门子公司 | Method for electrically connecting inverter and motor |
| CN106253267A (en) * | 2016-08-01 | 2016-12-21 | 珠海格力电器股份有限公司 | Supply self adaptation adjusting apparatus and method |
| CN106253267B (en) * | 2016-08-01 | 2018-12-04 | 珠海格力电器股份有限公司 | Supply self adaptation adjusts device and method |
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