A kind of standby power consumption control circuit of miniature circuit breaker motor-operating mechanism
Technical field
This utility model relates to the standby power consumption control circuit of a kind of chopper.
Background technology
The single-phase/three-phase expense control intelligent electric energy meter used in the market have employed external chopper in a large number to control break-make, but current this external chopper exists some drawbacks.Owing to the power supply of external chopper is connected on electric energy meter rear end, chopper itself will also as a part for load, and its power consumption also can include electric energy metrical in.If designed external circuit breaker control unit power consumption is excessive, it may appear that during electric energy meter idle condition, electric energy adds up, and affects electric energy metrical, and this can produce substantial amounts of electricity consumption dispute.
Utility model content
In order to solve Problems existing in background technology, this utility model provides the standby power consumption control circuit of a kind of miniature circuit breaker motor-operating mechanism, this control circuit can reduce the chopper stand-by power consumption in "on" position, eliminates electric energy meter meterage Problems existing.
For reaching above-mentioned purpose, this utility model adopts the following technical scheme that
A kind of standby power consumption control circuit of miniature circuit breaker motor-operating mechanism, including AC power supply module, step-down rectifying circuit, DC/DC module, control signal and feedback signal circuit, DC/DC module on and off switch circuit and single-chip microcomputer, AC power supply module is connected with DC/DC module by step-down rectifying circuit, control signal and feedback signal circuit have Liang Ge branch: control signal lines and feedback signal circuit, control signal lines connects DC/DC module and single-chip microcomputer respectively through DC/DC module on and off switch circuit, feedback signal circuit connects single-chip microcomputer, single-chip microcomputer is connected with direct current generator.
DC/DC module on and off switch circuit is that control signal is through R22 resistance blood pressure lowering, diode D8 rectification filters, through R21 resistance blood pressure lowering and electric capacity C8, the base stage being followed by audion Q4 again, the emitter stage of audion Q4 connects the control end of DC/DC module, audion Q4 grounded collector, Q4 base stage connects the colelctor electrode of Q5 audion, Q5 transistor emitter ground connection, Q5 base stage connects Single-chip Controlling through resistance R23.
The beneficial effects of the utility model are: this control circuit can reduce the chopper stand-by power consumption in "on" position, eliminate electric energy meter meterage Problems existing.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, this utility model is further illustrated
Fig. 1 is the circuit diagram of control circuit described in the utility model.
Detailed description of the invention
Illustrate with detailed description of the invention, this utility model to be further described below in conjunction with accompanying drawing:
Embodiment 1
nullAs shown in Figure 1,A kind of standby power consumption control circuit of miniature circuit breaker motor-operating mechanism,Including power module、Step-down rectifier module、DC/DC module、Control signal and feedback signal circuit and single-chip microcomputer,Power module is 220V alternating current,220 alternating current power supplys are connected with DC/DC module after diode D2 rectification and electric capacity C5 filter,Control signal and feedback signal circuit P5 You Liangge branch,One is control signal lines,Other one is feedback signal circuit,Control signal lines is through R22 resistance blood pressure lowering,Diode D8 rectification filters, through R21 resistance blood pressure lowering and electric capacity C8, the base stage being followed by audion Q4 again,The emitter stage of audion Q4 connects the control end of DC/DC module,Audion Q4 grounded collector,Q4 base stage connects the colelctor electrode of Q5 audion,Q5 transistor emitter ground connection,Q5 base stage connects Single-chip Controlling through resistance R23.
Feedback signal circuit, through resistance R210 and resistance R222 blood pressure lowering, is connected with the base stage of audion R2 then through after diode D81 rectification and resistance R211 blood pressure lowering, and the colelctor electrode of audion R2 connects single-chip microcomputer.
Single-chip microcomputer manually switchs S1 and is connected with direct current generator.
The workflow of this control circuit is: for single-chip microcomputer and testing circuit electricity consumption after the rectified blood pressure lowering of 220V alternating current, single-chip microcomputer detection control signal and feedback signal, when single-chip microcomputer detects without control signal, send enabling signal and make direct current generator rotate forward, at this moment breaker open operation;When there being control signal, motor rotates forward, at this moment breaker closing.After combined floodgate, single-chip microcomputer detects that feedback signal, single-chip microcomputer issue instructions to Q5 and make Q4 work, control DC/DC module from service, control signal again from have to without time, Q4 audion end, DC/DC module works, and electric machine rotation makes breaker open operation, such periodic duty.
It will be recognized by those skilled in the art, under the premise not necessarily departing from protection scope of the present invention, it is possible to above-mentioned embodiment is carried out various amendment, change and combination, and thinks that this amendment, change and combination are within the scope of originality thought.