CN103065872A

CN103065872A - Device for controlling magnetism-maintaining contactor

Info

Publication number: CN103065872A
Application number: CN2012105583089A
Authority: CN
Inventors: 李晟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2012-12-20
Filing date: 2012-12-20
Publication date: 2013-04-24
Anticipated expiration: 2032-12-20
Also published as: CN103065872B

Abstract

The invention provided a device for controlling a magnetism-maintaining contactor. The device for controlling the magnetism-maintaining contactor comprises a direction-switching circuit and a timing drive circuit, wherein the direction-switching circuit is connected with a coil of the magnetism-maintaining contactor and a first power supply which supports power for the magnetism-maintaining contactor. The timing drive circuit is connected with the direction-switching circuit, used for receiving electrical signals, and transmits the electrical signals to the direction-switching circuit within a pre-set first safe time length. The electrical signals are used for controlling the direction-switching circuit to change an electrical connection between the coil and the first power supply and ensure that the current direction in the coil is changed. The first safe time length is maximum time of the power-on coil of the magnetism-maintaining contactor. The device for controlling the magnetism-maintaining contactor guarantees safety of the power-on coil of the magnetism-maintaining contactor, and the coil can not be burned down because of overlong power-on time.

Description

The device of control magnetic latching contactor

Technical field

The present invention relates to the magnetic latching contactor technology, relate in particular to a kind of device of controlling magnetic latching contactor.

Background technology

Magnetic latching contactor is a kind of new type contactor that grew up in recent years, also is a kind of automatic switch.The same with other contactors, circuit is played automatic connection and cutting action.Difference is, the normally closed or normally open of magnetic latching contactor is the effect that relies on permanent-magnet steel fully, and the conversion of its on off state triggers by the pulse electrical signal of one fixed width and finishes.

Magnetic latching contactor is switched on or switched off the contact by the transformation of the sense of current in its coil (COIL).The state of magnetic latching contactor keeps, and does not need coil charged, has energy conservation characteristic.When the magnetic latching contactor coil is long charged, can damage magnetic latching contactor.

But, when running, the program that produces pulse electrical signal or system such as micro-control unit (Micro ControlUnit, MCU) fly or when breaking down, pulse electrical signal continues the level of remaining valid, and electric current can continue to cause coil burnout by the magnetic latching relay coil.

Summary of the invention

The embodiment of the invention provides a kind of device of controlling magnetic latching contactor, is used for solving the problem that may burn the magnetic latching contactor coil after the CPU race flies.

The embodiment of the invention provides a kind of device of controlling magnetic latching contactor, comprising:

The direction commutation circuit links to each other with the coil of described magnetic latching contactor and first power supply of powering for described magnetic latching contactor;

Timing driving circuit, link to each other with described direction commutation circuit, be used for receiving the signal of telecommunication, and in the first default safe duration, to the described signal of telecommunication of described direction commutation circuit transparent transmission, the described signal of telecommunication is used for controlling described direction commutation circuit and changes electrical connection between described coil and the first power supply, so that the sense of current in the described coil changes, the described first safe duration is the maximum duration of the coil electricity of described magnetic latching contactor.

The device of the control magnetic latching contactor that the embodiment of the invention provides, only in being the maximum duration of coil electricity of described magnetic latching contactor, the first safe duration passes through the direction commutation circuit by the timing driving circuit control signal of telecommunication, so that in the coil time of generation current can not surpass the first safe duration, guaranteed the fail safe of the coil electricity of magnetic latching contactor, can not burnt because conduction time is long.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do one to the accompanying drawing of required use in embodiment or the description of the Prior Art and introduce simply, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

A kind of structural representation of controlling the device of magnetic latching contactor that Fig. 1 provides for the embodiment of the invention;

The another kind that Fig. 2 provides for the embodiment of the invention is controlled the structural representation of the device of magnetic latching contactor;

The another kind that Fig. 3 provides for the embodiment of the invention is controlled the application circuit of the device of magnetic latching contactor;

Fig. 4 A is a kind of sense of current figure in the coil of magnetic latching contactor of device shown in Figure 3 control;

Fig. 4 B is a kind of test waveform figure between LOADSW_A point and the LOADSW_B point in the device shown in Figure 3;

Fig. 5 is the potential change figure of metal-oxide-semiconductor Q2 source electrode in installing shown in Fig. 3, drain electrode, grid;

Fig. 6 A is the another kind of sense of current figure in the coil of magnetic latching contactor of device shown in Figure 3 control;

Fig. 6 B is the another kind of test waveform figure between LOADSW_A point and the LOADSW_B point in the device shown in Figure 3;

The circuit diagram of the device of another control magnetic latching contactor that Fig. 7 provides for the embodiment of the invention.

Embodiment

A kind of structural representation of controlling the device of magnetic latching contactor that Fig. 1 provides for the embodiment of the invention.As shown in Figure 1, the device of control magnetic latching contactor comprises: direction commutation circuit 11 and timing driving circuit 12.

Suppose that the device of the control magnetic latching contactor that present embodiment provides will control a certain magnetic latching contactor, and a certain the first power supply is this magnetic latching contactor power supply, so, wherein, direction commutation circuit 11 links to each other with coil and this first power supply of this magnetic latching contactor, is used for the sense of current of switching coil.As in the direction commutation circuit 11 switching circuit being set, the first end of switching circuit connects the first end of the coil of magnetic latching contactor, the second end of switching circuit connects the second end of the coil of magnetic latching contactor, the 3rd end of switching circuit connects the hot end of the first power supply, the 4th end of switching circuit connects the cold end of the first power supply, direction commutation circuit 11 can be by changing coil the electrical connection of two ends and the high cold end of the first power supply, sense of current in the change coil.With conducting between the first end of switching circuit and the 3rd end, and in the situation of conducting between the second end of switching circuit and the 4th end, the sense of current in the coil is for flowing to the second end of coil from the first end of coil such as direction commutation circuit 11; Such as direction commutation circuit 11 with conducting between the first end of switching circuit and the 4th end, and between the second end of switching circuit and the 3rd end in the situation of conducting, the sense of current in the coil is for flowing to the first end of coil from the second end of coil, so the purpose that just can reach the sense of current in the switching coil by controlling party switching circuit in the commutation circuit 11.

Timing driving circuit 12 links to each other with direction commutation circuit 11, be used for receiving the signal of telecommunication, and in the first default safe duration, to this signal of telecommunication of direction commutation circuit 11 transparent transmissions (for example when the direction commutation circuit is a wire, this signal of telecommunication can be by passing under this root wire), this signal of telecommunication is used for the electrical connection that controlling party changes between coil and the first power supply to commutation circuit 11, so that the sense of current in the coil changes.Wherein, the first safe duration is the maximum duration of the coil electricity of this magnetic latching contactor, that is to say, the coil of this magnetic latching contactor keeps the words of energising can not burnt in the first safe duration, is safe.

Because timing driving circuit 12 is these signals of telecommunication of transparent transmission in the first safe duration, therefore, direction commutation circuit 11 is under the control of this signal of telecommunication, so that in the coil time of generation current can not surpass the first safe duration, guaranteed the fail safe of the coil electricity of magnetic latching contactor, can not burnt because conduction time is long.

The another kind that Fig. 2 provides for the embodiment of the invention is controlled the structural representation of the device of magnetic latching contactor.As shown in Figure 2, the device of control magnetic latching contactor comprises direction commutation circuit 21 and timing driving circuit 22.Wherein, timing driving circuit 22 comprises the first timing circuit 221, the first drive circuit 222, the second timing circuit 223 and the second drive circuit 224.

The first timing circuit 221 is used for receiving first signal of telecommunication, and in the first safe duration this first signal of telecommunication of transparent transmission, this first signal of telecommunication is used for realizing the first electrical connection.Suppose that the device of the control magnetic latching contactor that present embodiment provides controls a certain magnetic latching contactor, so, the conducting state between the first end of the hot end that above-mentioned the first electrical connection is the first power supply and the coil of this magnetic latching contactor.Wherein, the first safe duration sees the explanation in embodiment illustrated in fig. 1 for details.

The first drive circuit 222 links to each other with above-mentioned the first timing circuit 221 and direction commutation circuit 21, is used for receiving first signal of telecommunication of the first timing circuit 221 transparent transmissions, and under the control of this first signal of telecommunication, driving direction commutation circuit 21 realizes the first electrical connection.

The second timing circuit 223 is used for when the first timing circuit 221 receives first signal of telecommunication, receive second signal of telecommunication, and in the first safe duration this second signal of telecommunication of transparent transmission, this second signal of telecommunication is used for realizing the second electrical connection, the conducting state between the second end of the coil that this second electrical connection is this magnetic latching contactor and the cold end of the first power supply.

The second drive circuit 224 links to each other with above-mentioned the second timing circuit 223 and direction commutation circuit 21, is used for receiving second signal of telecommunication of the second timing circuit 223 transparent transmissions, and under the control of this second signal of telecommunication, driving direction commutation circuit 21 realizes the second electrical connection.

Like this, when the first timing circuit 221 receives first signal of telecommunication, when the second timing circuit 223 receives second signal of telecommunication, between the hot end of the first end of the coil of this magnetic latching contactor and the first power supply, in the first safe duration, realize conducting, realize conducting between the cold end of the second end and the first power supply in the first safe duration, the sense of current in the coil of this magnetic latching contactor is for to flow to the second end from first end.

Above-mentioned the second timing circuit 223 also is used for receiving the 3rd signal of telecommunication, and in the first safe duration transparent transmission the 3rd signal of telecommunication, the 3rd signal of telecommunication be used for to be realized the 3rd electrical connection, and the 3rd electrical connection is the conducting state between second end of coil of the hot end of the first power supply and this magnetic latching contactor.

Above-mentioned the second drive circuit 224 also is used for receiving the 3rd signal of telecommunication of the second timing circuit 223 transparent transmissions, and under the control of the 3rd signal of telecommunication, driving direction commutation circuit 21 realizes the 3rd electrical connection.

Above-mentioned the first timing circuit 221 also is used for when the second timing circuit 223 receives the 3rd signal of telecommunication, receive the 4th signal of telecommunication, and in the first safe duration transparent transmission the 4th signal of telecommunication, the 4th signal of telecommunication be used for to be realized the 4th electrical connection, and the 4th electrical connection is the conducting state between the cold end of the first end of the coil of this magnetic latching contactor and the first power supply.

Above-mentioned the first drive circuit 222 also is used for receiving the 4th signal of telecommunication of the first timing circuit 221 transparent transmissions, and under the control of the 4th signal of telecommunication, driving direction commutation circuit 21 realizes the 4th electrical connection.

Like this, when the second timing circuit 223 receives the 3rd signal of telecommunication, when the first timing circuit 221 receives the 4th signal of telecommunication, between the second end of the coil of this magnetic latching contactor and the hot end of the first power supply, in the first safe duration, realize conducting, realize conducting between the cold end of first end and the first power supply in the first safe duration, the sense of current in the coil of this magnetic latching contactor is for to flow to first end from the second end.

Alternatively, in the device embodiment illustrated in fig. 2, the direction commutation circuit comprises: the first relay and the second relay.

Wherein, the coil sides of the first relay links to each other with above-mentioned the first drive circuit, and switch-side links to each other with first end and first power supply of the coil of magnetic latching contactor to be controlled; The coil sides of the second relay links to each other with above-mentioned the second drive circuit, and switch-side links to each other with the second end and described first power supply of the coil of magnetic latching contactor to be controlled.

The direction commutation circuit is by the electrical connection of the first end of the coil of the first Control the first power supply and magnetic latching contactor to be controlled, such as the conducting of the first end of the coil of the hot end that can realize the first power supply and magnetic latching contactor to be controlled, perhaps as realize the conducting of first end of the coil of the cold end of the first power supply and magnetic latching contactor to be controlled.

The direction commutation circuit is by the electrical connection of the first end of the coil of the second Control the first power supply and magnetic latching contactor to be controlled, such as the conducting of the second end of the coil of the hot end that can realize the first power supply and magnetic latching contactor to be controlled, perhaps as realize the conducting of the second end of the coil of the cold end of the first power supply and magnetic latching contactor to be controlled.Like this, the direction commutation circuit just can realize the switching of the sense of current in the coil of magnetic latching contactor to be controlled by the first relay, the second relay.

Preferably, for the direction commutation circuit, device embodiment illustrated in fig. 2 also comprises: the first relay protection circuit and the second relay protection circuit.

Wherein, the first relay protection circuit comprises: the first switching circuit, the first delay circuit, the 3rd timing circuit and the 3rd drive circuit.

The switch-side of above-mentioned the first relay links to each other with described the first power supply by the first switching circuit.

The first delay circuit is used for receiving simultaneously described first signal of telecommunication or the 4th signal of telecommunication with the first timing circuit, and is used for delaying time described first signal of telecommunication or the 4th signal of telecommunication, obtains the first delayed electric signal.

The 3rd timing circuit links to each other with the first delay circuit, is used for above-mentioned the first delayed electric signal of transparent transmission in the second default safe duration, and this second safe duration is less than the above-mentioned first safe duration.

The 3rd drive circuit is used for receiving the first delayed electric signal of above-mentioned the 3rd timing circuit transparent transmission, and opens above-mentioned the first switching circuit under the control of the first delayed electric signal, makes switch-side and first power turn-on of above-mentioned the first relay.Because the transparent transmission duration of the first delayed electric signal is the second safe duration; less than the above-mentioned first safe duration; therefore; the time that the first switching circuit is opened is shorter than the time of receiving the signal of telecommunication of the first relay; when the first switching circuit cuts out; when disconnecting the electrical connection between the first power supply and the first relay; the first relay is received remains first signal of telecommunication or the 4th signal of telecommunication; that is to say the operation that the contact of the first relay can not be opened or turn-off; and the first relay this moment no power; when operation that the contact of the first relay is opened or turn-offed; to carry out in the situation of electric current not having; avoid relay that the problem that causes the contact to be damaged because of arcing in the situation of electric current is being arranged, thereby effectively protected relay.

The second relay protection circuit and the first relay protection circuit are similar, comprising: second switch circuit, the second delay circuit, the 4th timing circuit and 4 wheel driven move circuit.

Similarly, the switch-side of above-mentioned the second relay links to each other with the first power supply by the second switch circuit.

The second delay circuit is used for receiving simultaneously above-mentioned second signal of telecommunication or the 3rd signal of telecommunication with the second timing circuit, and is used for delaying time above-mentioned second signal of telecommunication or the 3rd signal of telecommunication, obtains the second delayed electric signal.

The 4th timing circuit links to each other with above-mentioned the second delay circuit, is used for above-mentioned the second delayed electric signal of transparent transmission in the 3rd default safe duration, length when the 3rd safe time length ratio above-mentioned first is safe.The 3rd safe duration also can equal the above-mentioned second safe duration.

The moving circuit of 4 wheel driven is used for receiving the second delayed electric signal of above-mentioned the 4th timing circuit transparent transmission, and opens above-mentioned second switch circuit under the control of the second delayed electric signal, makes switch-side and first power turn-on of the second relay.The second relay protection circuit protects the principle of the second relay and above-mentioned the first relay protection circuit to protect the principle of the first relay similar, repeats no more here.

Above-mentioned the first delay circuit, the second delay circuit can be phase-shift circuit (RC circuit), also can be the circuit that comprises monostable flipflop and timer.

Alternatively, above-mentioned the 3rd timing circuit, the 4th timing circuit comprise: the 5th resistance, the 6th resistance, the 7th resistance, diode, the second electric capacity.

The first end of the 5th resistance links to each other with second source, and the second end links to each other with the positive pole of diode.Wherein second source is for generation of control signals such as first signal of telecommunication, second signal of telecommunication, the 3rd signal of telecommunication, the 4th signals of telecommunication.

The first end of the 6th resistance links to each other with the second end of the 7th resistance, and the second termination is received above-mentioned the first delayed electric signal, the second delayed electric signal.

The first end of the 7th resistance links to each other with the first end of the second electric capacity, and resistance is greater than the resistance sum of the 5th resistance and the 6th resistance.

The negative pole of diode links to each other with the second end of the 6th resistance.

The second end ground connection of the second electric capacity, and link to each other with the first end of the 6th resistance.

In the 3rd timing circuit, the first end of the second electric capacity links to each other with the 3rd drive circuit; In the 4th timing circuit, the first end of the second electric capacity links to each other with the moving circuit of 4 wheel driven.

Alternatively, above-mentioned the 3rd drive circuit, the moving circuit of 4 wheel driven include: the second metal-oxide-semiconductor, optical coupling isolator, transistor.

The second metal-oxide-semiconductor in the 3rd drive circuit links to each other with above-mentioned the 3rd timing circuit, above-mentioned the first switching circuit links to each other by transistor AND gate the first power supply in the 3rd drive circuit, the second metal-oxide-semiconductor in the 3rd drive circuit is used under the control of the first delayed electric signal of the 3rd timing circuit transparent transmission, drives the transistor that the optical coupling isolator in the 3rd drive circuit controls in the 3rd drive circuit and opens above-mentioned the first switching circuit.

The second metal-oxide-semiconductor in the moving circuit of 4 wheel driven links to each other with above-mentioned the 4th timing circuit, above-mentioned second switch circuit links to each other by transistor AND gate the first power supply in the moving circuit of this 4 wheel driven, the second metal-oxide-semiconductor in the moving circuit of 4 wheel driven is used under the control of the second delayed electric signal of the 4th timing circuit transparent transmission, drives optical coupling isolator in the moving circuit of 4 wheel driven and controls described transistor and open the second switch circuit.

Alternatively, in the device embodiment illustrated in fig. 2, the first timing circuit, the second timing circuit include: the first resistance, the second resistance, the 3rd resistance, diode and the first electric capacity.

The first end of the first resistance links to each other with second source, and the second end links to each other with the positive pole of diode.Second source is for generation of control signals such as first signal of telecommunication, second signal of telecommunication, the 3rd signal of telecommunication, the 4th signals of telecommunication.

The first end of the second resistance links to each other with the second end of the 3rd resistance, and the second end is used for receiving above-mentioned first signal of telecommunication, second signal of telecommunication, the 3rd signal of telecommunication or the 4th signal of telecommunication.

The first end of the 3rd resistance links to each other with the first end of the first electric capacity, and resistance is greater than the resistance sum of above-mentioned the first resistance and the second resistance.

The negative pole of diode links to each other with the second end of above-mentioned the second resistance.

The second end ground connection of above-mentioned the first electric capacity, and link to each other with the first end of above-mentioned the second resistance.

In this first timing circuit, the first end of the first electric capacity links to each other with the first drive circuit; In this second timing circuit, the first end of the first electric capacity links to each other with the second drive circuit.

Alternatively, in the device embodiment illustrated in fig. 2, the first drive circuit, the second drive circuit include: the first metal-oxide-semiconductor and the 4th resistance.

In the first drive circuit, the source electrode of the first metal-oxide-semiconductor links to each other with the second end of above-mentioned the second resistance, and drain electrode links to each other with the coil sides of above-mentioned the first relay; The first end of the 4th resistance links to each other with the grid of the first metal-oxide-semiconductor, and the second end links to each other with the first end of above-mentioned the first electric capacity.

In the second drive circuit, the source electrode of the first metal-oxide-semiconductor links to each other with the second end of above-mentioned the second resistance, and drain electrode links to each other with the coil sides of above-mentioned the second relay; The first end of the 4th resistance links to each other with the grid of the first metal-oxide-semiconductor, and the second end links to each other with the first end of above-mentioned the first electric capacity.

As a kind of improvement of the present invention, on the basis of the device that provides embodiment illustrated in fig. 2, the device of control magnetic latching contactor also can comprise: the first negate clamp circuit.The input of this first negate clamp circuit links to each other with above-mentioned the first timing circuit, and output links to each other with above-mentioned the second timing circuit, is used for described first signal of telecommunication is converted to described second signal of telecommunication, or described the 4th signal of telecommunication is converted to described the 3rd signal of telecommunication.Like this, the device of control magnetic latching contactor only need pass through a holding wire, just can realize the switching of the sense of current in the coil of magnetic latching contactor.As when the signal that transmits in the holding wire is first signal of telecommunication, when the first timing circuit receives first signal of telecommunication, the second timing circuit receives second signal of telecommunication that is converted to by the first negate clamp circuit, thereby so that the hot end of the first end of coil and the first power supply is realized conducting, the cold end of the second end of coil and the first power supply is realized conducting simultaneously, and electric current is crossed the second end that flows to coil from the first end of coil.For another example, when the signal that transmits in the holding wire is the 4th signal of telecommunication, when the first timing circuit receives the 4th signal of telecommunication, the second timing circuit receives the 3rd signal of telecommunication that is converted to by the first negate clamp circuit, thereby so that the cold end of the first end of coil and the first power supply is realized conducting, the hot end of the second end of coil and the first power supply is realized conducting simultaneously, electric current is crossed the first end that flows to coil from the second end of coil, has realized the switching of the sense of current in the coil of magnetic latching contactor.The device of control magnetic latching contactor has reduced the pin number of the device of control magnetic latching contactor by the negate clamp circuit is set.

As a kind of improvement of the present invention, on the basis of the device that provides embodiment illustrated in fig. 2, the device of control magnetic latching contactor also can comprise: Prective circuit for transistor, and for the protection of above-mentioned the first switching circuit and second switch circuit.Can comprise thermistor such as Prective circuit for transistor.

The another kind that Fig. 3 provides for the embodiment of the invention is controlled the application circuit of the device of magnetic latching contactor.In the present embodiment, the device of the control magnetic latching contactor that a certain magnetic latching contactor 30 is controlled comprises the first timing circuit 31, the first drive circuit 32, the second timing circuit 33, the second drive circuit 34, direction commutation circuit 35, the first relay protection circuit, the second relay protection circuit and negate clamp circuit 38.In addition, the device of the control magnetic latching contactor that provides of present embodiment also comprises piezo-resistance RV3, thermistor RT11 and thermistor RT12.The first end of piezo-resistance RV3 connects the first end of magnetic latching contactor 30 coils, and the second end connects the second end of magnetic latching contactor 30 coils, so that coil is protected.Purpose with thermistor RT11, thermistor RT12 is, short circuit between LOADSW_A point and LOADSW_B point, and when control signal LOADON, LOADOFF have change action again, prevent from being in short-circuit condition between VBUS+ and the VBUS-, thereby avoid metal-oxide-semiconductor Q7 and metal-oxide-semiconductor Q8 to be burned.

As shown in Figure 3, the first timing circuit 31 comprises: capacitor C 9, resistance R 3, resistance R 12, resistance R 5 and diode D12.Wherein, the resistance of resistance R 5 is much larger than the resistance of resistance R 3 and resistance R 12.The first end of resistance R 3 connects the hot end 12V of second source, and the second end links to each other with the pin 2 of diode D12, and control signal LOADOFF is from the second end input of resistance R 3.

The first drive circuit 32 comprises: resistance R 27 and metal-oxide-semiconductor Q2.The second end of the resistance R 3 in the source electrode of metal-oxide-semiconductor Q2 (S) and the first timing circuit 31 links to each other.

The second timing circuit 33 comprises: capacitor C 8, resistance R 2, resistance R 10, resistance R 6 and diode D11, the parameter of each element and annexation and the first timing circuit 31 are similar, difference is, the control signal of the input of the second timing circuit 33 (being the second end of resistance R 2, also is an end that links to each other with diode D11 on the resistance R 2) input is LOADON.

The second drive circuit 34 comprises: resistance R 28 and metal-oxide-semiconductor Q4.The second end of the resistance R 2 in the source electrode of metal-oxide-semiconductor Q4 (S) and the second timing circuit 33 links to each other.

Direction commutation circuit 35 comprises: relay K 5, relay K 6, diode D18 and diode D19.The pin 1 of relay K 5 meets the hot end 12V of second source, and pin 2, pin 7 meet the hot end VBUS+ of the first power supply, and pin 3, pin 6 connect the first end of magnetic latching contactor 30.The pin 1 of relay K 6 meets the hot end 12V of second source, and pin 2, pin 7 meet the hot end VBUS+ of the first power supply, and pin 3, pin 6 connect the second end of magnetic latching contactor 30 by thermistor RT11, thermistor RT12.Relay K 5, relay K 6 are in coil during no current, and the contact is all given tacit consent to and beaten to pin 7.

The first relay protection circuit comprises: the first switching circuit 361, the first delay circuit 362, the 3rd timing circuit 363 and the 3rd drive circuit 364.

The first delay circuit 362 is the RC circuit that resistance R 13 and capacitor C 6 form.The second end of the resistance R 3 in the first end of resistance R 13 and the first timing circuit 31 links to each other, and that is to say that the input signal of the first delay circuit 362 is control signal LOADOFF.

The 3rd timing circuit 363 comprises: capacitor C 3, resistance R 4, resistance R 11, resistance R 42 and diode D15, its annexation and the first timing circuit 31 are similar.The resistance of resistance R 42 is less than the resistance of resistance R 5 in the first timing circuit 31.The second end of resistance R 4 links to each other with the second end of resistance R 13.

The 3rd drive circuit 364 comprises: metal-oxide-semiconductor Q3, optical coupling isolator U2, triode Q6, diode D17, capacitor C 2, capacitor C 5, resistance R 8, resistance R 16, resistance R 17, resistance R 20, resistance R 22, resistance R 25, resistance R 26, resistance R 30, resistance R 32 and resistance R 44.The source electrode of metal-oxide-semiconductor Q3 (S) links to each other with the second end of resistance R 4, and drain electrode (D) links to each other with the pin 2 of optical coupling isolator U2, and grid (G) links to each other with resistance R 30.The pin 1 of optical coupling isolator U2 meets the hot end 12V of second source by resistance R 17, and pin 3 is by the collector electrode (C) of resistance R 44 connecting triode Q6, and pin 4 links to each other with the base stage (B) of triode Q6 by resistance R 32.The emitter of triode Q6 (E) meets the hot end VBUS+ of the first power supply by resistance R 25, resistance R 26, and collector electrode is grid by the pin 4(that resistance R 22 meets metal-oxide-semiconductor Q7), meet the cold end VBUS-of the first power supply by capacitor C 2.The resistance of resistance R 44 is greater than the resistance of resistance R 25, resistance R 26.

The first switching circuit 361 is metal-oxide-semiconductor Q7.The drain electrode of metal-oxide-semiconductor Q7 (pin 6, pin 7 and pin 8) links to each other with pin 5 with the pin 4 of relay K 5, and source electrode (pin 1, pin 2 and pin 3) meets the cold end VBUS-of the first power supply.

In the first relay protection circuit, the 3rd timing circuit 363 and the 3rd drive circuit 364 be the state of control switch metal-oxide-semiconductor Q7 together.

Compare with the first timing circuit 31 of relay K 5; add the first delay circuit 362 that comprises capacitor C 6, resistance R 13 in the first relay protection circuit; in order to make the signal lag control signal LOADOFF of the source electrode that is added in metal-oxide-semiconductor Q3; thereby so that metal-oxide-semiconductor Q7 is later than relay K 5 conductings; realize that relay K 5 is closed first, more closed metal-oxide-semiconductor Q7.

The second relay protection circuit comprises: second switch circuit 371, the second delay circuit 372, the 4th timing circuit 373 and 4 wheel driven move circuit 374.

The second delay circuit 372 is the RC circuit that resistance R 14 and capacitor C 7 form, and the annexation between its component parameters and the element and the first delay circuit 362 are similar.

The 4th timing circuit 373 comprises: capacitor C 10, resistance R 1, resistance R 9, resistance R 41 and diode D14, the annexation between its component parameters and the element and the 3rd timing circuit 363 are similar.

The moving circuit 374 of 4 wheel driven comprises: metal-oxide-semiconductor Q1, optical coupling isolator U1, triode Q5, diode D16, capacitor C 1, capacitor C 4, resistance R 7, resistance R 15, resistance R 18, resistance R 19, resistance R 21, resistance R 23, resistance R 24, resistance R 29, resistance R 31 and resistance R 43, the annexation between its component parameters and the element and the 3rd drive circuit 364 are similar.

Negate clamp circuit 38 comprises: triode Q9, resistance R 121 and resistance R 122.The base stage of triode Q9 links to each other with the second end of resistance R 3 by resistance R 122, and emitter meets the cold end GND12V of second source, and with base stage between link to each other by resistance R 121, collector electrode links to each other with the second end of resistance R 2.Need to prove that the negate clamp circuit can be any circuit that has input signal negate function, is not limited to the triode in the example circuit.

When control signal LOADOFF was high resistant, the 12V second source was by the base stage of resistance R 3, resistance R 122 arrival triode Q9, so that triode Q9 conducting, the level of the collector electrode of triode Q9 is pulled to GND, and namely control signal LOADON is low level; When control signal LOADOFF is low level, the base potential of triode Q9 also is low, triode Q9 cut-off, the collector electrode of triode Q9 can be similar to and think high-impedance state at this moment, namely control signal LOADON is high resistant, has namely reached the purpose of using a holding wire that magnetic latching contactor is controlled.

Control signal LOADOFF is used for the break-make of control relay K5 and the break-make of metal-oxide-semiconductor Q7.After control signal LOADOFF processes through negate clamp circuit 38, controlled signal LOADON.Control signal LOADON is used for the break-make of control relay K6 and the break-make of metal-oxide-semiconductor Q8.

As shown in Figure 3, the device of the control magnetic latching contactor that provides of present embodiment uses single holding wire control magnetic latching contactor.The control signal that this single holding wire is input to the device of control magnetic latching contactor is LOADOFF, should be called control line by single holding wire for ease of describing.This control signal LOADOFF can be provided by microcontroller (Microcontroller, MCU).

The switch of the below's magnetic latching contactor during take control signal LOADOFF as low level disconnects, and then the switch closure of magnetic latching contactor is example when control signal LOADOFF is high resistant, and the device that present embodiment is provided is elaborated.

When the control signal LOADOFF of control line output is high resistant, in the first delay circuit 31, the first drive circuit 32 and the direction commutation circuit 35, the 12V second source passes through resistance R 3, diode D12, resistance R 12 to capacitor C 9 quick charges, because the resistance of resistance R 5 is far longer than the resistance of resistance R 3 and resistance R 12, therefore capacitor C 9 charges the voltage of electricity near 12V, so that the gate source voltage VGS=0 of metal-oxide-semiconductor Q2.Like this, metal-oxide-semiconductor Q2 cut-off, no current on the coil of relay K 5, the switch of relay K 5 is in off-state, and the contact acquiescence is got to pin 7, i.e. the hot end VBUS+ conducting of the first end of the coil of magnetic latching contactor 30 and the first power supply.

In the first relay protection circuit; after control signal LOADOFF delays time through the first delay circuit 362; arrive the 3rd timing circuit 363; the drain voltage of metal-oxide-semiconductor Q3 becomes 12V, so that no current flows through on the pin 1 of optical coupling isolator U2, pin 2, the pin 3 of optical coupling isolator U2, pin 4 can't conductings; cause triode Q6 cut-off; the grid of metal-oxide-semiconductor Q7 is pulled to 0V, the gate-source voltage VGS=0 of metal-oxide-semiconductor Q7, metal-oxide-semiconductor Q7 cut-off.

Negate clamp circuit 38 is converted to low level with high resistant, i.e. the control signal LOADON of negate clamp circuit 38 outputs is low level.

The second timing circuit 33, the second drive circuit 34 and direction commutation circuit 35 are under the control of low level control signal LOADON, when the operation of carrying out and following LOADOFF are low level 0V, the class of operation of carrying out in the first delay circuit 31, the first drive circuit 32 and the direction commutation circuit 35 seemingly, difference is, is relay K 6 closures in the direction commutation circuit 35 here.During relay K 6 closure, the contact is beaten to pin 5.

The second relay protection circuit is under the control of low level control signal LOADON, and when the operation of execution and following LOADOFF were low level 0V, the class of operation of carrying out in the first relay protection circuit seemingly.Because 372 couples of control signal LOADON of the second delay circuit delay time, metal-oxide-semiconductor Q8 has protected the contact of relay K 6 effectively in relay K 6 closed afterwards conductings.Relay K 6 meets the cold end VBUS-of the first power supply in the situation of metal-oxide-semiconductor Q8 conducting.At this moment, the sense of current in the coil of magnetic latching contactor 30 flows to the LOADSW_B point from the LOADSW_A point shown in Fig. 4 A, and namely the first end from the coil of magnetic latching contactor 30 flows to the second end, the switch closure of magnetic latching contactor 30, and load powers on.Test waveform between LOADSW_A point and the LOADSW_B point is shown in Fig. 4 B.Among Fig. 4 B, oscillographic channel C 1 shows is voltage between LOADSW_A and the LOADWS_B, and channel C 4 shows is electric current between LOADSW_A and the LOADWS_B, and LOADSW_A, LOADSW_B two point voltages are poor for just.Black heavy line waveform is the both end voltage of the coil of magnetic latching contactor 30, and the thick double dot dash line waveform of black is the electric current that flows through the coil of magnetic latching contactor 30.When the duration of the coil two ends of magnetic latching contactor 30 generation voltage and current flowing surpassed 200ms, protective circuit began protection, the current vanishes on the coil of magnetic latching contactor 30.

When the control signal LOADOFF of control line output was low level 0V, in the first delay circuit 31, the first drive circuit 32 and the direction commutation circuit 35, the source voltage of metal-oxide-semiconductor Q2 was 0V.Because the existence of diode D12, capacitor C 9 is by resistance R 5 discharges.The complete cut-ff voltage of supposing metal-oxide-semiconductor Q2 is VGS=3V, and before the voltage of C9 was lower than 3V, metal-oxide-semiconductor Q2 was conducting.Owing between the drain electrode of+12V and metal-oxide-semiconductor Q2 pressure reduction is arranged, generation current on the coil of relay K 5 causes the switch closure of relay K 5, and the contact is beaten to pin 5.

Discharge formula Vg=12 * e according to electric capacity ^-t/RC3V, can calculate the ON time Ta of metal-oxide-semiconductor Q2.After the switch closure Ta of relay K 5, metal-oxide-semiconductor Q2 cut-off.

The potential change of metal-oxide-semiconductor Q2 source electrode, drain electrode, grid as shown in Figure 5, source voltage VS is the current potential on the control line, after the current potential duration was long, metal-oxide-semiconductor Q2 turn-offed, drain voltage VD is high level, thereby relay K 5 is turn-offed.

After the metal-oxide-semiconductor Q2 cut-off, current circuit disconnects, the current vanishes on the coil of relay K 5, and the switch of relay K 5 recovers off-state, and the contact is beaten again to pin 7.

Generally speaking, the ON time Ta of metal-oxide-semiconductor Q2 is shorter than the switching time of control signal LOADOFF.That is to say, be that the low level time is long at control signal LOADOFF, and before control signal LOADOFF was converted to high resistant, the ON time Ta of metal-oxide-semiconductor Q2 finished.

In the first relay protection circuit; before the timing circuit protection; after control signal LOADOFF delays time through the first delay circuit 362; arrive the 3rd timing circuit 363, after metal-oxide-semiconductor Q2 conducting, the drain voltage of metal-oxide-semiconductor Q3 becomes 0V; optical coupling isolator U2 conducting; cause triode Q6 conducting, the electric current that the hot end VBUS+ of the first power supply provides flows into the cold end VBUS-of the first power supply again through emitter, the collector electrode of triode Q6 through resistance R 44.Because the resistance of resistance R 44 is larger, so that it is enough high to be added in the voltage at its two ends, the grid voltage of metal-oxide-semiconductor Q7 is higher than source voltage like this, metal-oxide-semiconductor Q7 conducting.This moment, relay K 5 was closed, that is to say afterwards conducting of metal-oxide-semiconductor Q7.Because when metal-oxide-semiconductor Q7 conducting, just there is electric current to flow through in the switch of relay K 5, that is to say when the current flowing of the contact of relay K 5 and finished closed procedure, the contact that perhaps also can say relay K 5 is the closed procedure that carries out in the situation of electric current not having.And with respect to the resistance R 5 in the first timing circuit 31 of relay K 5, the resistance of the resistance R 42 in the 3rd timing circuit 363 on the discharge loop of capacitor C 3 is less, therefore the discharge time (being assumed to be Tb) of capacitor C 3 is shorter, so that the time of metal-oxide-semiconductor Q3 conducting is shorter than the metal-oxide-semiconductor Q2 in the first drive circuit 32, the ON time Tb on the metal-oxide-semiconductor Q7 in the first switching circuit 361 is less than the closing time Ta of the relay K 5 in the direction commutation circuit 35.Like this, when metal-oxide-semiconductor Q7 ON time reaches Tb, can disconnect prior to relay K 5, that is to say that metal-oxide-semiconductor Q7 disconnects first, relay K 5 rear disconnections when having guaranteed the contact execution opening operation of relay K 5, do not have electric current yet on the switching circuit of relay K 5.Like this, all do not have electric current on the circuit when closed procedure or opening operation are carried out in the contact of relay K 5, the problem of having avoided the contact to damage because of arcing has been protected relay K 5 effectively.

Negate clamp circuit 38 is processed low level control signal LOADOFF, obtains the control signal LOADON of high resistant.

The second timing circuit 33, the second drive circuit 34 and direction commutation circuit 35 are under the control of the control signal LOADON of high resistant, when the operation of carrying out and above-mentioned LOADOFF are high resistant, the class of operation of carrying out in the first delay circuit 31, the first drive circuit 32 and the direction commutation circuit 35 seemingly, difference is, is that the relay K 6 in the direction commutation circuit 35 disconnects here.When relay K 6 disconnected, the contact was beaten to pin 7.Generally speaking, because before control signal LOADOFF switched to low level, namely before control signal LOADON switched to high resistant, the time that metal-oxide-semiconductor Q4 conducting is satisfied in the discharge of capacitor C 8 ended, therefore, relay K 6 disconnected before control signal LOADON switches to high resistant.After LOADON switched to high resistant, relay K 6 continued to remain open.

The second relay protection circuit is under the control of the control signal LOADON of high resistant, and when the operation of execution and above-mentioned LOADOFF were high resistant, the class of operation of carrying out in the first relay protection circuit seemingly.Difference is, generally speaking, because before control signal LOADOFF switches to low level, namely before control signal LOADON switches to high resistant, the time that metal-oxide-semiconductor Q1 conducting is satisfied in the discharge of capacitor C 10 ends, therefore, metal-oxide-semiconductor Q8 disconnected before control signal LOADON switches to high resistant.And; because the resistance of the resistance R 41 in the 4th timing circuit 373 is less than the resistance of the resistance R 6 in the second timing circuit 33; therefore; the time that metal-oxide-semiconductor Q1 conducting is satisfied in the discharge of capacitor C 10 is shorter than the ON time of metal-oxide-semiconductor Q4; that is to say; metal-oxide-semiconductor Q8 disconnected before relay K 6 disconnects, and had effectively protected the contact of relay K 6.After LOADON switched to high resistant, metal-oxide-semiconductor Q8 continued to remain open.

Relay K 6 meets the hot end VBUS+ of the first power supply in situation about disconnecting.At this moment, the sense of current in the coil of magnetic latching contactor 30 flows to the LOADSW_A point from the LOADSW_B point as shown in Figure 6A, and namely the second end from the coil of magnetic latching contactor 30 flows to first end, and the switch of magnetic latching contactor 30 turn-offs, i.e. load disconnects.Test waveform between LOADSW_A, the LOADSW_B is shown in Fig. 6 B, among Fig. 6 B, channel C 1 shows is voltage between 2 of LOADSW_A, the LOADSW_B, channel C 4 shows is electric current between 2 of LOADSW_A, the LOADSW_B, by control LOADSW_A, LOADSW_B voltage height, produce the electric current of different directions; LOADSW_A, LOADSW_B two point voltages are poor for negative.

The device that present embodiment provides adopts hardware to realize; comprise the hardware such as negate clamp circuit, timing driving circuit and direction commutation circuit; switch by the sense of current in the coil of single holding wire control magnetic latching contactor, and realized oversize hardware protection of the coil current currency of magnetic latching contactor.

Alternatively, in the device that provides embodiment illustrated in fig. 1, timing driving circuit comprises: the 5th timing circuit, the 5th drive circuit, the 6th timing circuit, the 7th timing circuit, the 7th drive circuit, the 8th timing circuit and the 8th drive circuit.

The 5th timing circuit is used for receiving the 5th signal of telecommunication, and in the above-mentioned first safe duration transparent transmission the 5th signal of telecommunication, the 5th signal of telecommunication is used for realizing the first electrical connection and the second electrical connection, this first electrical connection sees the explanation in embodiment illustrated in fig. 2 for details, it is the conducting state between the first end of coil of the hot end of the first power supply and magnetic latching contactor to be controlled, this second electrical connection sees the explanation of above-described embodiment for details, is the conducting state between the cold end of the second end of described coil and described the first power supply.Wherein, the first power supply sees the explanation in embodiment illustrated in fig. 1 for details.

The 5th drive circuit links to each other with the 5th timing circuit and direction commutation circuit, is used for receiving the 5th signal of telecommunication of the 5th timing circuit transparent transmission, and under the control of the 5th signal of telecommunication, the driving direction commutation circuit realizes the first electrical connection.

The 6th timing circuit is used for receiving simultaneously the 5th signal of telecommunication with the 5th timing circuit, and in the first safe duration transparent transmission the 5th signal of telecommunication.

The 6th drive circuit links to each other with the 6th timing circuit and direction commutation circuit, is used for receiving the 5th signal of telecommunication of the 6th timing circuit transparent transmission, and under the control of the 5th signal of telecommunication, the driving direction commutation circuit realizes the second electrical connection.

The 7th timing circuit is used for receiving the 6th signal of telecommunication, and in the first safe duration transparent transmission the 6th signal of telecommunication, the 6th signal of telecommunication is used for realizing the 3rd electrical connection and the 4th electrical connection, the 3rd electrical connection sees above-mentioned explanation in embodiment illustrated in fig. 1 for details, be the conducting state between the second end of the hot end of described the first power supply and described coil, the 4th electrical connection sees above-mentioned explanation in embodiment illustrated in fig. 1 for details, is the conducting state between the cold end of the first end of the coil of magnetic latching contactor to be controlled and the first power supply.

The 7th drive circuit links to each other with the 7th timing circuit and direction commutation circuit, be used for receiving the 6th signal of telecommunication of the 7th timing circuit transparent transmission, and under the control of the 6th signal of telecommunication, the driving direction commutation circuit realizes described the 3rd electrical connection.

The 8th timing circuit is used for receiving simultaneously the 6th signal of telecommunication with the 8th timing circuit, and in the first safe duration described the 6th signal of telecommunication of transparent transmission.

The 8th drive circuit links to each other with the 8th timing circuit and direction commutation circuit, be used for receiving the 6th signal of telecommunication of the 8th timing circuit transparent transmission, and under the control of the 6th signal of telecommunication, the driving direction commutation circuit realizes the 4th electrical connection.

Alternatively, in the device that provides embodiment illustrated in fig. 1, the direction commutation circuit comprises: the 5th switching circuit, the 6th switching circuit, minion are closed circuit and the 8th switch circuit.

The 5th switching circuit links to each other with the first end of the coil of the 5th drive circuit, magnetic latching contactor to be controlled and the hot end of the first power supply, is used for the electrical connection between the hot end of the first end of the coil of opening or turn-off magnetic latching contactor to be controlled under the driving of the 5th drive circuit and the first power supply.

The 6th switching circuit links to each other with the second end of the coil of the 6th drive circuit, magnetic latching contactor to be controlled and the cold end of the first power supply, be used under the driving of the 6th drive circuit, open or turn-off the electrical connection between the cold end of second end of coil of magnetic latching contactor to be controlled and the first power supply.

Minion is closed circuit and is linked to each other with the second end of the coil of the 7th drive circuit, magnetic latching contactor to be controlled and the hot end of high-tension current, be used under the driving of the 7th drive circuit, open or turn-off the electrical connection between the hot end of second end of coil of magnetic latching contactor to be controlled and the first power supply.

The 8th switch circuit links to each other with the first end of the coil of the 8th drive circuit, magnetic latching contactor to be controlled and the cold end of high-tension current, be used under the driving of the 8th drive circuit, open or turn-off the electrical connection between the cold end of the first end of coil of magnetic latching contactor to be controlled and the first power supply.

As a kind of improvement of the present invention, the device that provides embodiment illustrated in fig. 1 also can comprise: the second negate clamp circuit.The input of the second negate clamp circuit links to each other with the 5th timing circuit and the 6th timing circuit, and output links to each other with the 7th timing circuit and the 8th timing circuit, is used for the 5th signal of telecommunication or the 6th signal of telecommunication negate.The principle of the second negate clamp circuit sees above-mentioned Fig. 2, the explanation in embodiment illustrated in fig. 3 for details.

The circuit diagram of the device of another control magnetic latching contactor that Fig. 7 provides for the embodiment of the invention.In the present embodiment, the device of control magnetic latching contactor comprises: clamp negate circuit 71, timing driving circuit 72 and direction commutation circuit 73.

Timing driving circuit 72 comprises the 5th timing circuit 721, the 5th drive circuit 722, the 6th timing circuit 723, the 6th drive circuit 724, the 7th timing circuit 725, the 7th drive circuit 726, the 8th timing circuit 727 and the 8th drive circuit 728.

Direction commutation circuit 73 comprises: the 5th switching circuit 731, the 6th switching circuit 732, minion are closed circuit 733, the 8th switch circuit 734.The 5th switching circuit 731 closes circuit 733 with minion and all links to each other with power supply VCC, and the 6th switching circuit 732 all links to each other with ground GND with the 8th switch circuit 734.Wherein power supply VCC is used to the coil power supply of magnetic latching contactor.

As shown in Figure 7, control signal B can be obtained after control signal A is processed by the second negate clamp circuit 71, has avoided the device of control magnetic latching contactor that a holding wire is set in addition, has reduced the pin number of the device of control magnetic latching contactor.

When being provided with in addition special holding wire control signal B be provided, the output of the second negate clamp circuit 71 is drawn extremely, when not establishing in addition special holding wire control signal B is provided, the level after 71 couples of control signal A of the second negate clamp circuit negate can be used as control signal B input.

When control signal A was significant level, the second negate clamp circuit 71 can be exported an inactive level, and namely control signal B is inactive level.In like manner, when control signal A is inactive level, the second negate clamp circuit 71 output significant levels, namely control signal B is significant level.

Timing driving circuit 72 is used for to the input signal timing, and when overlong time when being significant level of the control signal of input, it is invalid that it can be forced control signal, thereby cuts off the electric current in the coil of magnetic latching contactor to be controlled.

Timing driving circuit 72 is mainly in two sub-sections: timing circuit part and switch driving circuit part.The 5th timing circuit 721, the 6th timing circuit 723, the 7th timing circuit 725 and the 8th timing circuit 727 are mainly used in timing, and within safe duration the transparent transmission significant level control signal give switch driving circuit such as the 5th drive circuit 722, the 6th drive circuit 724, the 7th drive circuit 726, the 8th drive circuit 728 etc., when control signal A still is significant level when surpassing safe duration, the passage of its meeting cutting-off controlling signal A and switch driving circuit, the output invalid signals is to switch driving circuit.

The 5th timing circuit 721, the 6th timing circuit 723, the 7th timing circuit 725 and the 8th timing circuit 727 can be realized by the multiple circuit such as RC circuit, 555 timers.

The switch driving circuits such as the 5th drive circuit 722, the 6th drive circuit 724, the 7th drive circuit 726, the 8th drive circuit 728 are used for the control switch circuit and close the closed and disconnected of circuit 733, the 8th switch circuit 734 etc. such as the 5th switching circuit 731, the 6th switching circuit 732, minion, according to the difference of switching circuit, switch driving circuit also has multiple implementation.

For example, when control signal A was significant level, the 5th timing circuit 721, the 6th timing circuit 723 passed through respectively the 5th drive circuit 722, the 6th drive circuit 724 with control signal A, and the beginning timing.The 5th drive circuit 722, the 6th drive circuit 724 can drive respectively the 5th switching circuit 731 after receiving the control signal of significant level, the 6th switching circuit 732 is opened, at this moment left end and the power supply VCC conducting of the coil of magnetic latching contactor, right-hand member ground connection, thus there is electric current to flow through from left to right the coil of magnetic latching contactor.If the overlong time that significant level continues, the safe duration that surpasses the 5th timing circuit 721, the 6th timing circuit 723, timing circuit is understood the passage of cutting-off controlling signal A and switch driving circuit so, so that level is invalid, thereby the 5th drive circuit 722, the 6th drive circuit 724 can disconnect respectively the 5th switching circuit 731, the 6th switching circuit 732 guarantees that the coil of magnetic latching contactors is not burnt.If it is invalid that control signal A becomes in safe duration, then the 5th timing circuit 721, the 6th timing circuit 723 can not move.

The 7th timing circuit 725, the 7th drive circuit 726, the 8th timing circuit 727 and the 8th drive circuit 728, minion for control signal B control are closed circuit 733, the 8th switch circuit 734, and be similar with above-mentioned the 5th timing circuit 721, the 5th drive circuit 722, the 6th timing circuit 723, the 6th drive circuit 724, the 5th switching circuit 731, the control principle of the 6th switching circuit 732 under control signal A.

Four switching circuit the 5th switching circuits 731, the 6th switching circuit 732, minions are closed circuit 733 in the direction commutation circuit 73, the 8th switch circuit 734 consist of full-bridges, close by the 5th switching circuit 731, the 6th switching circuit 732 and minion that the sense of current switches in the in turn closed coil of realizing magnetic latching contactor of circuit 733, the 8th switch circuit 734.

The 5th switching circuit 731, the 6th switching circuit 732, minion are closed circuit 733, the 8th switch circuit 734 can be any circuit module with switching characteristic, devices such as triode, metal-oxide-semiconductor, relay, thyristor.

The device of the control magnetic latching contactor that present embodiment provides has improved the fail safe of the coil of controlled magnetic latching contactor by timing driving circuit.And the device of the control magnetic latching contactor that present embodiment provides effectively reduces the pin number of device by clamp negate circuit

It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.

Claims

1. a device of controlling magnetic latching contactor is characterized in that, comprising:

2. described device according to claim 1 is characterized in that described timing driving circuit comprises:

The first timing circuit, be used for receiving first signal of telecommunication, and in the described first safe duration described first signal of telecommunication of transparent transmission, described first signal of telecommunication is used for realizing the first electrical connection, and described the first electrical connection is the conducting state between the first end of the hot end of described the first power supply and described coil;

The first drive circuit, link to each other with described the first timing circuit and direction commutation circuit, be used for receiving first signal of telecommunication of described the first timing circuit transparent transmission, and under the control of described first signal of telecommunication, drive described direction commutation circuit and realize described the first electrical connection;

The second timing circuit, be used for when described the first timing circuit receives described first signal of telecommunication, receive second signal of telecommunication, and in the described first safe duration described second signal of telecommunication of transparent transmission, described second signal of telecommunication is used for realizing the second electrical connection, and described the second electrical connection is the conducting state between the cold end of the second end of described coil and described the first power supply;

The second drive circuit, link to each other with described the second timing circuit and direction commutation circuit, be used for receiving second signal of telecommunication of described the second timing circuit transparent transmission, and under the control of described second signal of telecommunication, drive described direction commutation circuit and realize described the second electrical connection;

Described the second timing circuit, also be used for receiving the 3rd signal of telecommunication, and in the described first safe duration described the 3rd signal of telecommunication of transparent transmission, described the 3rd signal of telecommunication is used for realizing the 3rd electrical connection, and described the 3rd electrical connection is the conducting state between the second end of the hot end of described the first power supply and described coil;

Described the second drive circuit also is used for receiving the 3rd signal of telecommunication of described the second timing circuit transparent transmission, and under the control of described the 3rd signal of telecommunication, drives described direction commutation circuit and realize described the 3rd electrical connection;

Described the first timing circuit, also be used for when described the second timing circuit receives the 3rd signal of telecommunication, receive the 4th signal of telecommunication, and in the described first safe duration described the 4th signal of telecommunication of transparent transmission, described the 4th signal of telecommunication is used for realizing the 4th electrical connection, and described the 4th electrical connection is the conducting state between the cold end of the first end of described coil and described the first power supply;

Described the first drive circuit also is used for receiving the 4th signal of telecommunication of described the first timing circuit transparent transmission, and under the control of described the 4th signal of telecommunication, drives described direction commutation circuit and realize the 4th electrical connection.

3. described device according to claim 2 is characterized in that described direction commutation circuit comprises: the first relay, the second relay;

The coil sides of described the first relay links to each other with described the first drive circuit, and the switch-side of described the first relay links to each other with the first end of described coil and described the first power supply;

The coil sides of described the second relay links to each other with described the second drive circuit, and the switch-side of described the second relay links to each other with the second end and described first power supply of described coil.

4. described device according to claim 3 is characterized in that described the first timing circuit, the second timing circuit include:

The first resistance, first end links to each other with second source, and the second end links to each other with the positive pole of diode;

The second resistance, first end links to each other with the second end of the 3rd resistance, and the second end is used for receiving described first signal of telecommunication, second signal of telecommunication, the 3rd signal of telecommunication or the 4th signal of telecommunication;

Described the 3rd resistance, first end links to each other with the first end of the first electric capacity, and resistance is greater than the resistance sum of described the first resistance and the second resistance;

Described diode, negative pole links to each other with the second end of described the second resistance;

Described the first electric capacity, the second end ground connection, and link to each other with the first end of described the second resistance;

In described the first timing circuit, the first end of described the first electric capacity links to each other with described the first drive circuit; In described the second timing circuit, the first end of described the first electric capacity links to each other with described the second drive circuit.

5. described device according to claim 4 is characterized in that described the first drive circuit, the second drive circuit include:

The first metal-oxide-semiconductor, source electrode links to each other with the second end of described the second resistance;

The 4th resistance, first end links to each other with the grid of described the first metal-oxide-semiconductor, and the second end links to each other with the first end of described the first electric capacity;

In described the first drive circuit, the drain electrode of the first metal-oxide-semiconductor links to each other with the coil sides of described the first relay; In described the second drive circuit, the drain electrode of the first metal-oxide-semiconductor links to each other with the coil sides of described the second relay.

6. each described device is characterized in that according to claim 3-5, also comprises: the first relay protection circuit and the second relay protection circuit;

Described the first relay protection circuit comprises:

The first switching circuit, the switch-side of described the first relay links to each other with described the first power supply by described the first switching circuit;

The first delay circuit is used for receiving simultaneously described first signal of telecommunication or the 4th signal of telecommunication with described the first timing circuit, and is used for delaying time described first signal of telecommunication or the 4th signal of telecommunication, obtains the first delayed electric signal;

The 3rd timing circuit links to each other with described the first delay circuit, is used for described the first delayed electric signal of transparent transmission in the second default safe duration, and the described second safe duration is less than the described first safe duration;

The 3rd drive circuit is used for receiving the first delayed electric signal of described the 3rd timing circuit transparent transmission, and opens described the first switching circuit under the control of described the first delayed electric signal, makes switch-side and described first power turn-on of described the first relay;

Described the second relay protection circuit comprises:

The second switch circuit, the switch-side of described the second relay links to each other with described the first power supply by described second switch circuit;

The second delay circuit is used for receiving simultaneously described second signal of telecommunication or the 3rd signal of telecommunication with described the second timing circuit, and is used for delaying time described second signal of telecommunication or the 3rd signal of telecommunication, obtains the second delayed electric signal;

The 4th timing circuit links to each other with described the second delay circuit, is used for described the second delayed electric signal of transparent transmission in the 3rd default safe duration, length when the described the 3rd safe time length ratio described first is safe;

4 wheel driven moves circuit, is used for receiving the second delayed electric signal of described the 4th timing circuit transparent transmission, and opens described second switch circuit under the control of described the second delayed electric signal, makes switch-side and described first power turn-on of described the second relay.

7. described device according to claim 6 is characterized in that described the first delay circuit, the second delay circuit are phase-shift circuit, perhaps is the circuit that comprises monostable flipflop and timer.

8. described device according to claim 6 is characterized in that described the 3rd timing circuit, the 4th timing circuit include:

The 5th resistance, first end links to each other with second source, and the second end links to each other with the positive pole of diode;

The 6th resistance, first end links to each other with the second end of the 7th resistance, and the second termination is received described the first delayed electric signal, the second delayed electric signal;

Described the 7th resistance, first end links to each other with the first end of the second electric capacity, and resistance is greater than the resistance sum of described the 5th resistance and the 6th resistance;

Described diode, negative pole links to each other with the second end of described the 6th resistance;

Described the second electric capacity, the second end ground connection, and link to each other with the first end of described the 6th resistance;

In described the 3rd timing circuit, the first end of described the second electric capacity links to each other with described the 3rd drive circuit; In described the 4th timing circuit, the first end of described the second electric capacity links to each other with the moving circuit of described 4 wheel driven.

9. described device according to claim 8 is characterized in that, described the 3rd drive circuit, the moving circuit of 4 wheel driven include: the second metal-oxide-semiconductor, optical coupling isolator, transistor;

The second metal-oxide-semiconductor in described the 3rd drive circuit links to each other with described the 3rd timing circuit, described the first switching circuit links to each other by described the first power supply of transistor AND gate in described the 3rd drive circuit, the second metal-oxide-semiconductor in described the 3rd drive circuit is used under the control of the first delayed electric signal of described the 3rd timing circuit transparent transmission, drives the transistor that the optical coupling isolator in described the 3rd drive circuit controls in described the 3rd drive circuit and opens described the first switching circuit;

The second metal-oxide-semiconductor in the moving circuit of described 4 wheel driven links to each other with described the 4th timing circuit, described second switch circuit links to each other by described the first power supply of transistor AND gate in the moving circuit of described 4 wheel driven, the second metal-oxide-semiconductor in the moving circuit of described 4 wheel driven is used under the control of the second delayed electric signal of described the 4th timing circuit transparent transmission, drives optical coupling isolator in the moving circuit of described 4 wheel driven and controls described transistor and open described second switch circuit.

10. described device according to claim 6 is characterized in that described the first switching circuit, second switch circuit are triode, metal-oxide-semiconductor or thyristor.

11. described device is characterized in that according to claim 10, also comprises Prective circuit for transistor, for the protection of described the first switching circuit and second switch circuit.

12. described device is characterized in that according to claim 1, described timing driving circuit comprises:

The 5th timing circuit, be used for receiving the 5th signal of telecommunication, and in the described first safe duration described the 5th signal of telecommunication of transparent transmission, described the 5th signal of telecommunication is used for realizing the first electrical connection and the second electrical connection, described the first electrical connection is the conducting state between the first end of the hot end of described the first power supply and described coil, and described the second electrical connection is the conducting state between the cold end of the second end of described coil and described the first power supply;

The 5th drive circuit, link to each other with described the 5th timing circuit and direction commutation circuit, be used for receiving the 5th signal of telecommunication of described the 5th timing circuit transparent transmission, and under the control of described the 5th signal of telecommunication, drive described direction commutation circuit and realize described the first electrical connection;

The 6th timing circuit is used for receiving simultaneously described the 5th signal of telecommunication with described the 5th timing circuit, and in the described first safe duration described the 5th signal of telecommunication of transparent transmission;

The 6th drive circuit, link to each other with described the 6th timing circuit and direction commutation circuit, be used for receiving the 5th signal of telecommunication of described the 6th timing circuit transparent transmission, and under the control of described the 5th signal of telecommunication, drive described direction commutation circuit and realize described the second electrical connection;

The 7th timing circuit, be used for receiving the 6th signal of telecommunication, and in the described first safe duration described the 6th signal of telecommunication of transparent transmission, described the 6th signal of telecommunication is used for realizing the 3rd electrical connection and the 4th electrical connection, described the 3rd electrical connection is the conducting state between the second end of the hot end of described the first power supply and described coil, and described the 4th electrical connection is the conducting state between the cold end of the first end of described coil and described the first power supply;

The 7th drive circuit, link to each other with described the 7th timing circuit and direction commutation circuit, be used for receiving the 6th signal of telecommunication of described the 7th timing circuit transparent transmission, and under the control of described the 6th signal of telecommunication, drive described direction commutation circuit and realize described the 3rd electrical connection;

The 8th timing circuit is used for receiving simultaneously described the 6th signal of telecommunication with described the 8th timing circuit, and in the described first safe duration described the 6th signal of telecommunication of transparent transmission;

The 8th drive circuit, link to each other with described the 8th timing circuit and direction commutation circuit, be used for receiving the 6th signal of telecommunication of described the 8th timing circuit transparent transmission, and under the control of described the 6th signal of telecommunication, drive described direction commutation circuit and realize described the 4th electrical connection.

13. described device is characterized in that according to claim 12, described direction commutation circuit comprises:

The 5th switching circuit, link to each other with the first end of described the 5th drive circuit, described coil and the hot end of described the first power supply, be used for the electrical connection between the hot end of the first end of opening or turn-off described coil under the driving of described the 5th drive circuit and described the first power supply;

The 6th switching circuit, link to each other with the second end of described the 6th drive circuit, described coil and the cold end of described the first power supply, be used under the driving of described the 6th drive circuit, open or turn-off the electrical connection between the cold end of the second end of described coil and described the first power supply;

Minion is closed circuit, link to each other with the second end of described the 7th drive circuit, described coil and the hot end of described high-tension current, be used under the driving of described the 7th drive circuit, open or turn-off the electrical connection between the hot end of the second end of described coil and described the first power supply;

The 8th switch circuit, the first end of described the 8th drive circuit, described coil and the cold end of described high-tension current link to each other, be used under the driving of described the 8th drive circuit, open or turn-off the electrical connection between the cold end of the first end of described coil and described the first power supply.

14. each described device is characterized in that according to claim 1-5, also comprises:

The first negate clamp circuit, input links to each other with described the first timing circuit, and output links to each other with described the second timing circuit, is used for described first signal of telecommunication is converted to described second signal of telecommunication, or described the 4th signal of telecommunication is converted to described the 3rd signal of telecommunication.

15. according to claim 12 or 13 described devices, it is characterized in that, also comprise:

The second negate clamp circuit, input links to each other with described the 5th timing circuit and the 6th timing circuit, and output links to each other with described the 7th timing circuit and the 8th timing circuit, is used for described the 5th signal of telecommunication or the 6th signal of telecommunication negate.