CN206546801U - Control drive circuit built in intelligent electric meter - Google Patents
Control drive circuit built in intelligent electric meter Download PDFInfo
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- CN206546801U CN206546801U CN201720067997.1U CN201720067997U CN206546801U CN 206546801 U CN206546801 U CN 206546801U CN 201720067997 U CN201720067997 U CN 201720067997U CN 206546801 U CN206546801 U CN 206546801U
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Abstract
Control drive circuit built in intelligent electric meter, the first controlling switch of the base stage contact relay of the first triode, emitter stage connects power supply, the second controlling switch of collector connecting relay；Second controlling switch of the base stage contact relay of the second triode, emitter stage connects power supply, the first controlling switch of collector connecting relay；The grounded emitter of 3rd triode, the second controlling switch of collector connecting relay, base stage is connected with MCU I/O interface and is grounded after the 5th resistance；The grounded emitter of 4th triode, the first controlling switch of collector connecting relay, base stage is connected with MCU I/O interface and is grounded after the 6th resistance；The 1 pin ground connection of first bilateral diode, 2 pin connect the emitter stage of the first triode, the second controlling switch of 3 pin contact relays；The 1 pin ground connection of second bilateral diode, 2 pin connect the emitter stage of the second triode, the first controlling switch of 3 pin contact relays.The utility model is reliable and stable, cheap.
Description
Technical field
The utility model belongs to electronic circuit technology field, and in particular to a kind of control of relay built in intelligent electric meter is driven
Dynamic circuit.
Background technology
As power industry intelligent electric energy meter high-volume updates, intelligent electric energy meter will to on-load switch control and operation
Ask increasingly stricter, so as to ensure the stability of resident's normal electricity consumption, and unnecessary electric power dispute should not be produced.Load is opened
The inverse electromotive force of high-amplitude can be produced when closing control action, if this inverse electromotive force, which is dealt with improperly, will damage intelligent electric meter
Circuit and component.
In order to avoid damaging intelligent electric meter circuit components, conventional solution is in the transition in parallel of Control end
Suppressor, with to voltage amplitude limit, but can not so completely inhibit reverse high voltage, and cost is high.Patent No.
The relay drive circuit for the electric energy meter that 201020245700.4 Chinese utility model patent is disclosed, in four triodes
Collector and emitter all inverse parallel single-phase diodes, for suppressing reverse high voltage, but are due to be needed in the drive circuit
Increase by 4 diodes, not only increase material and production cost, and add the quantity of component, be unfavorable for PCB fabric swatch
Design.
Utility model content
The purpose of this utility model is to provide Control drive circuit built in a kind of intelligent electric meter, is easy to control,
It is reliable and stable, it is cheap, and with protection and extinguishing arc measure.
To achieve these goals, the utility model takes following technical solution：
Control drive circuit built in intelligent electric meter, including：First triode, the base stage warp of first triode
3rd resistor is connected with the first controlling switch of relay, and emitter stage is connected with power supply, the second control of colelctor electrode and relay
Pin is connected；Second triode, the base stage of second triode is connected through second resistance with the second controlling switch of relay,
Emitter stage is connected with power supply, and colelctor electrode is connected with the first controlling switch of relay；3rd triode, the 3rd triode
Grounded emitter, colelctor electrode is connected with the second controlling switch of relay, and base stage connects through first resistor and intelligent electric meter MCU IO
Mouth is connected, and base stage is grounded after the 5th resistance simultaneously；4th triode, the grounded emitter of the 4th triode, colelctor electrode
It is connected with the first controlling switch of relay, base stage is connected through the 4th resistance with intelligent electric meter MCU another I/O interface, and base stage is same
It is grounded after the resistance of Shi Jing six；First bilateral diode, the 1 pin ground connection of first bilateral diode, 2 pin and the described 1st
The emitter stage of pole pipe is connected, and 3 pin are connected with the second controlling switch of relay；Second bilateral diode, described second two-way two
The 1 pin ground connection of pole pipe, 2 pin are connected with the emitter stage of second triode, and 3 pin are connected with the first controlling switch of relay.
More specifically, first triode and the second triode are PNP type triode.
More specifically, the 3rd triode and the 4th triode are NPN type triode.
More specifically, the first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance and the 6th resistance are
Chip-R.
More specifically, 1 pin of first bilateral diode is anode, and 2 pin are negative electrode, and 3 pin are public pin.
More specifically, 1 pin of second bilateral diode is anode, and 2 pin are negative electrode, and 3 pin are public pin.
In above technical scheme, drive circuit of the present utility model, the colelctor electrode difference of two NPN type triodes
Connect after the colelctor electrode of two PNP type triodes, the base stage difference series resistor of two PNP type triodes again with mutual current collection
Pole interconnection, the emitter stage of two PNP type triodes is connected with each other power supply 12V, is easy to MCU to export in high and low Automatic level control
Put the corresponding state of relay so that the on off state of intelligent electric meter is reliable and stable.The black of relay, white line are in parallel two-way respectively
Diode, can preferably suppress reverse high voltage, drive circuit is played a protective role, and when relay switch is acted
Hardware extinguishing arc, the utility model controls the switching on of intelligent electric meter to act by controlling MCU level to export, reliable and stable,
It is cheap.
Brief description of the drawings
, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of the utility model embodiment
The accompanying drawing used does simple introduction, it should be apparent that, drawings in the following description are only some embodiments of the present utility model,
For those of ordinary skill in the art, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings
Other accompanying drawings.
Fig. 1 is the circuit diagram of the utility model embodiment.
Embodiment of the present utility model is described in more detail below in conjunction with accompanying drawing.
Embodiment
As shown in figure 1, Control drive circuit of the present utility model includes the first triode Q501, the second triode
Q502, the 3rd triode Q503, the 4th triode Q504, the first bilateral diode D502, the second bilateral diode D503, first
Resistance R501, second resistance R502,3rd resistor R503, the 4th resistance R504, the 5th resistance R507 and the 6th resistance R508.This
First resistor R501, second resistance R502,3rd resistor R503, the 4th resistance R504, the 5th resistance R507 and of embodiment
Six resistance R508 are Chip-R.
The first triode Q501 and the second triode Q502 of the present embodiment are PNP type triode.First triode Q501
Base stage be connected after 3rd resistor R503 with the relay RL1 pin of the first controlling switch 1 (black line), emitter stage and 12V power supplys
It is connected, colelctor electrode is connected with the relay RL1 pin of the second controlling switch 2 (white line).Second triode Q502 base stage is through second
It is connected after resistance R502 with relay RL1 2 pin, emitter stage is connected with 12V power supplys, colelctor electrode and relay RL1 1 pin phase
Even.12V power supplys are provided by intelligent electric meter.
First triode Q501 emitter stage is connected with the first bilateral diode D502 2 pin (negative electrode) simultaneously, first pair
It is grounded to diode D502 1 pin (anode), 3 pin are public pin, 3 pin are connected with relay RL1 2 pin.Second triode
Q502 emitter stage is connected with the second bilateral diode D503 2 pin (negative electrode) simultaneously, the second bilateral diode D503 1 pin
(anode) is grounded, and 3 pin are public pin, and 3 pin are connected with relay RL1 1 pin.
The 3rd triode Q503 of the present embodiment and the 4th triode Q504 is NPN type triode.3rd triode Q503
Grounded emitter, colelctor electrode is connected with relay RL1 2 pin, MCU of the base stage through first resistor R501 and intelligent electric meter IO
Interface (RALAYON control signal inputs) is connected, and the 3rd triode Q503 base stage is grounded after the 5th resistance R507 simultaneously,
It is consequently formed RELAYON energization control signal electrical networks.4th triode Q504 grounded emitter, colelctor electrode and relay
RL1 1 pin is connected, I/O interface (RALAYOFF control signal input) of the base stage through the 4th resistance R504 Yu intelligent electric meter MCU
It is connected, the 4th triode Q504 base stage is grounded after the 6th resistance R508 simultaneously, is consequently formed RELAYOFF and operates a switch control letter
Number electrical network.
The relay of the utility model driving is magnetic latching relay, and the coil power of magnetic latching relay is 1.5W, after
Electrical equipment electric shock capacity is more than or equal to 80A, and the control line of relay uses the 2PIN control lines of black and white line.When black and white line pressure difference for+
When 12V, duration are 200ms, relay feed motion；When black and white line pressure difference be -12V, duration be 200ms, relay
Device is operated a switch action, and duration 200ms is controlled by the MCU of intelligent electric meter.Electricity is driven to the utility model Control below
The course of work on road is illustrated：
Under normality, the control signal RELAYOFF and RELAYON of two I/O ports of MCU are output low level, now, the 3rd
Triode Q503, the 4th triode Q504, the first triode Q501 and the second triode Q502 are not turned on, built-in relay
RL1 1 pin and 2 pin voltages are all 12V, and between the two without electrical potential difference, built-in relay RL1 is failure to actuate；
When control signal RELAYON=1 exports high level, and RELAYOFF=0 exports low level, the 3rd triode Q503
With the second triode Q502 saturation conductions, the first triode Q501 and the 4th triode Q504 cut-offs, the 1 of built-in relay RL1
Pin voltage is 12V, and 2 pin voltages are 0V, maintain 200ms, it is ensured that after enough energy driving relay feed motions, 200ms,
RELAYON=0 exports low level, and relay magnetic keeps "on" position；
When control signal RELAYOFF=1 exports high level, and RELAYON=0 exports low level, the first triode Q501
With the 4th triode Q504 saturation conductions, the second triode Q502 and the 3rd triode Q503 cut-offs, the 2 of built-in relay RL1
Pin voltage is 12V, and 1 pin voltage is 0V, maintains 200ms, it is ensured that enough energy driving relays are operated a switch action, after 200ms,
RELAYOFF=0 exports low level, and relay magnetic keeps state of operating a switch.
Drive circuit of the present utility model forbids RELAYON=RELAYOFF=while the situation of high level is exported, to keep away
Exempt from that the first triode Q501 and the 3rd triode Q503 is simultaneously turned on or the second triode Q502 and the 4th triode Q504 is same
When conducting caused by triode burn and damage drive circuit.
The utility model controls the upset of two I/O port level by MCU, realizes the drawing of built-in relay, closes a floodgate dynamic
Make.Relay can produce anti-phase induced electromotive force when switching on is acted, and moment produces high voltage, for three in protection circuit
Pole pipe and the energy for discharging induced inversion electromotive force, set two bilateral diodes, two bilateral diodes in the driving circuit
Can be with the triode in protection circuit, extinguishing arc and the energy for discharging built-in relay switching on action induction reverse electromotive force.
Above example is only to illustrate the technical solution of the utility model rather than its limitations, although with reference to above-mentioned implementation
The utility model is described in detail example, it should be understood by a person of ordinary skill in the art that still can be to this reality
Modified or equivalent substitution, and repaiied without departing from any of the utility model spirit and scope with new embodiment
Change or equivalent substitution, it all should cover among scope of the present utility model.
Claims (6)
1. Control drive circuit built in intelligent electric meter, it is characterised in that including：
First triode, the base stage of first triode is connected through 3rd resistor with the first controlling switch of relay, transmitting
Pole is connected with power supply, and colelctor electrode is connected with the second controlling switch of relay；
Second triode, the base stage of second triode is connected through second resistance with the second controlling switch of relay, transmitting
Pole is connected with power supply, and colelctor electrode is connected with the first controlling switch of relay；
3rd triode, the grounded emitter of the 3rd triode, colelctor electrode is connected with the second controlling switch of relay, base
Pole is connected through first resistor with intelligent electric meter MCU I/O interface, and base stage is grounded after the 5th resistance simultaneously；
4th triode, the grounded emitter of the 4th triode, colelctor electrode is connected with the first controlling switch of relay, base
The resistance of pole the 4th is connected with intelligent electric meter MCU another I/O interface, and base stage is grounded after the 6th resistance simultaneously；
First bilateral diode, the 1 pin ground connection of first bilateral diode, the emitter stage phase of 2 pin and first triode
Even, 3 pin are connected with the second controlling switch of relay；
Second bilateral diode, the 1 pin ground connection of second bilateral diode, the emitter stage phase of 2 pin and second triode
Even, 3 pin are connected with the first controlling switch of relay.
2. Control drive circuit built in intelligent electric meter as claimed in claim 1, it is characterised in that：One or three pole
Pipe and the second triode are PNP type triode.
3. Control drive circuit built in intelligent electric meter as claimed in claim 1 or 2, it is characterised in that：Described 3rd
Triode and the 4th triode are NPN type triode.
4. Control drive circuit built in intelligent electric meter as claimed in claim 1, it is characterised in that：First electricity
Resistance, second resistance, 3rd resistor, the 4th resistance, the 5th resistance and the 6th resistance are Chip-R.
5. Control drive circuit built in intelligent electric meter as claimed in claim 1, it is characterised in that：Described first is two-way
1 pin of diode is anode, and 2 pin are negative electrode, and 3 pin are public pin.
6. Control drive circuit built in intelligent electric meter as claimed in claim 1, it is characterised in that：Described second is two-way
1 pin of diode is anode, and 2 pin are negative electrode, and 3 pin are public pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720067997.1U CN206546801U (en) | 2017-01-18 | 2017-01-18 | Control drive circuit built in intelligent electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720067997.1U CN206546801U (en) | 2017-01-18 | 2017-01-18 | Control drive circuit built in intelligent electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206546801U true CN206546801U (en) | 2017-10-10 |
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ID=59993597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720067997.1U Active CN206546801U (en) | 2017-01-18 | 2017-01-18 | Control drive circuit built in intelligent electric meter |
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| CN (1) | CN206546801U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020191914A1 (en) * | 2019-03-22 | 2020-10-01 | 广东美的制冷设备有限公司 | Drive control circuit and home appliance |
-
2017
- 2017-01-18 CN CN201720067997.1U patent/CN206546801U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020191914A1 (en) * | 2019-03-22 | 2020-10-01 | 广东美的制冷设备有限公司 | Drive control circuit and home appliance |
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