CN2632839Y

CN2632839Y - Electric saving relay driven by high-low level control pulse current

Info

Publication number: CN2632839Y
Application number: CN 03266128
Authority: CN
Inventors: 张国华
Original assignee: 武东胜
Priority date: 2003-06-27
Filing date: 2003-06-27
Publication date: 2004-08-11
Anticipated expiration: 2013-06-27

Abstract

The utility model relates to an electric saving relay driven by high-low level control pulse current, which belongs to the technical field of meter control electric appliance. The relay of the utility model comprises a controlled unicoil relay J, an electrolytic capacitor C, an NPN transistor T1 and a PNP transistor T2; wherein, the electrolytic capacitor C is connected with the relay coil in series to from a group; the positive end of the group is connected with the positive end of the power; and the negative end of the group is grounded by the PNP transistor T2; the collecting electrode of the NPN transistor T1 is connected with the positive end of the group, and the emitter electrode is connected with the negative end of the group; the base electrodes of the NPN transistor T1 and the PNP transistor T2 are integrated as a trigger end. The relay of the utility model has the advantages of low power consumption as well as easy control, and can be used for all the application fields driven by the high and low levels and demanding for low power consumption.

Description

The electricity-saving type relay of high-low level control impuls current drives

Technical field the utility model relates to the electricity-saving type relay of a kind of high-low level control, pulse current driving, belongs to instrument control apparatus technical field.

Background technology is in prior art, and the field operation portable apparatus is all battery-powered, for guaranteeing the operating time, wishes all that generally power consumption is as much as possible little.Use relay more in the instrument control circuit, and relay power consumption is bigger, thereby the power consumption that how to reduce relay has become one of key of portable apparatus design.

Relay mainly is divided into electromagnetic relay and time pulse relay two big classes at present.Electromagnetic relay is controlled its break-make by high-low level, the about 20～40mA of drive current.After the relay adhesive, drive current still need be kept.Time pulse relay only need a trigger impulse be may command its be switched on or switched off, we can say not power consumption basically.But for " unicoil locking " type time pulse relay, add a positive pulse relay is connected, add a negative pulse again and can make its disconnection, therefore needing provides positive and negative two groups of power supplys to work to control circuit, thereby is difficult in the portable apparatus." twin coil locking " switching on and off of type relay all is to control with positive pulse, only get final product with one group of power supply power supply, but it adds positive pulse respectively by two coils and controls its break-make, thereby each relay needs two I/O mouth lines, and the I/O mouth number that single-chip microcomputer had is limited, to using the more occasion of relay to be difficult to select for use, use in the market that has influenced this class relay.

The summary of the invention the purpose of this utility model is the electricity-saving type relay that a kind of high-low level control of design, pulse current drive, relay design is become the same with the common electrical magnetic relay control its break-make, and coil is only accepted current impulse thereby reduce power consumption by high and low level.

The high-low level control of the utility model design, the electricity-saving type relay that pulse current drives comprise that controlled unicoil is trivial and decide relay J, electrochemical capacitor C, NPN transistor T ₁With the PNP transistor T ₂, wherein capacitor C and relay coil are connected into a combination, the anode of the positive termination power of this combination, and the negative terminal of combination is by the PNP transistor T ₂Collector electrode---grounded emitter; NPN transistor T ₁Collector electrode connect the anode of above-mentioned combination, its emitter meets the negative terminal of above-mentioned combination, NPN transistor T ₁With the PNP transistor T ₂Base stage be connected to each other as trigger end.

The high-low level control of the utility model design, the electricity-saving type relay that pulse current drives, as long as two surface mounting crystal pipes and a patch capacitor are combined in the housing of " unicoil is trivial fixed " relay, or in unicoil lock-up relay outside additional electrochemical capacitor and NPN, PNP transistor, " electricity-saving type " relay that can form high-low level control, current impulse driving, control its break-make by high and low level, but coil is only accepted current impulse, thereby power consumption hardly.Its advantage is that not only power consumption is minimum, and control is simple, can be used for all drove and wished minimal power consumption with high-low level application scenario.

Description of drawings

Fig. 1 is the circuit diagram of " unicoil locking " type time pulse relay in the prior art.

Fig. 2 is the circuit diagram of the relay of the utility model design.

Fig. 3 and Fig. 4 are respectively the work schematic diagrames of relay.

Embodiment

The circuit of the high-low level control of the utility model design, the electricity-saving type relay that pulse current drives comprises controlled unicoil lock-up relay J, electrochemical capacitor C, NPN transistor T as shown in Figure 2 ₁With the PNP transistor T ₂, wherein capacitor C and relay coil are connected into a combination, the anode of the positive termination power of this combination, and the negative terminal of combination is by the PNP transistor T ₂Ground connection; NPN transistor T ₁Collector electrode connect the anode of above-mentioned combination, its emitter meets the negative terminal of above-mentioned combination, NPN transistor T ₁With the PNP transistor T ₂Base stage be connected to each other as trigger end.NPN in this relay, PNP transistor can have several, can also comprise resistance.

The operation principle of this relay is: input adds low level, PNP transistor T ₂Conducting, energising moment C is equivalent to short circuit thereby I is arranged _B2, I _C2Flow through T ₂, the sense of current as shown in Figure 3, along with I _CTo the charging of C, in the extremely short time (Millisecond), make C be full of electric charge.At this moment C is equivalent to open circuit, I _CEqual zero immediately, no longer power consumption of circuit.And provide a direct impulse to make the relay adhesive to relay coil in the moment of charging; Coil current is zero after the adhesive.But be full of electric charge on the capacitor C.The C both end voltage is approximately equal to supply voltage.

T when input adds high level ₂End, electric capacity both end voltage this moment (polarity as shown in Figure 4) is equivalent to be added in " negative supply " on the relay coil.Under this " negative supply " effect, by coil and control circuit is T ₁I is provided _B1, I _C1Make T ₁Conducting, relay coil flows through reverse current under " negative supply " effect, and the sense of current is as shown in Figure 4.Along with the discharge of C, " negative supply " voltage reduce until discharge rapidly is zero, and only flows through the current impulse of a negative sense in the relay coil but be enough to make relay to discharge.Not power consumption of battery in this process.What consume is the electric energy that is stored on the electric capacity.

Claims

1, a kind of electricity-saving type relay of high-low level control impuls current drives is characterized in that this relay decides relay J, electrochemical capacitor C, NPN transistor T by controlled unicoil is trivial ₁With the PNP transistor T ₂, wherein capacitor C and relay coil are connected into a combination, the anode of the positive termination power of this combination, and the negative terminal of combination is by collector electrode---the grounded emitter of PNP transistor T 2; NPN transistor T ₁Collector electrode connect the anode of above-mentioned combination, its emitter meets the negative terminal of above-mentioned combination, NPN transistor T ₁With the PNP transistor T ₂Base stage be connected to each other as trigger end.