CN108347179A - The external breaker control system of electric energy meter and its PSR reverse exciting switching voltage regulator circuits - Google Patents
The external breaker control system of electric energy meter and its PSR reverse exciting switching voltage regulator circuits Download PDFInfo
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- CN108347179A CN108347179A CN201710054182.4A CN201710054182A CN108347179A CN 108347179 A CN108347179 A CN 108347179A CN 201710054182 A CN201710054182 A CN 201710054182A CN 108347179 A CN108347179 A CN 108347179A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
The present invention is according to State Grid Corporation of China for the current power dissipation requirement of the entire controller of the external breaker of electric energy meter, devise the external breaker control system of novel electric energy meter and its PSR reverse exciting switching voltage regulator circuits, wherein, PSR reverse exciting switching voltage regulators circuit includes mainly：PSR power supply chips and its application circuit.Particularly, the PSR power supply chips have been internally integrated AC/DC Switching Power Supplies and MOSFET pipes, the drain electrode of the MOSSFET pipes form the SW pins of the PSR power supply chips.The design scheme of the present invention is of simple structure and low cost, has effectively reached the technique effect of super low-power consumption.
Description
Technical field
The present invention relates to the external field of circuit breakers of electric energy meter, more particularly to the external breaker control of electric energy meter of super low-power consumption
System processed and its PSR reverse exciting switching voltage regulator circuits of use.
Background technology
State Grid Corporation of China is in order to improve the expense control reliability of power information acquisition system, to ensure that power system security is steady
The external breaker standard of special electric energy meter has been formulated in fixed operation.The external breaker of electric energy meter has the institute of breaker sexual
Long-range arrearage separating brake control and payment shutting-brake control can and can be carried out by a control line.The external breaker of electric energy meter is owed
Take separating brake and payment closes a floodgate and uses level control mode, arrearage, long-range separating brake breaker are indicated when controlling level and being 0V；Work as control
Payment, remote switching breaker are indicated when level processed is 220V.In view of the electric energy that controller expends does not calculate the electricity in user
Fei Zhong, the external breaker standard of electric energy meter propose entire control system current power dissipation requirement, it is desirable that control unit close a floodgate or
Per phase line, the steady-state current of consumption is less than 0.2mA under 120% voltage after separating brake.Therefore, a kind of PSR of super low-power consumption is designed
Reverse exciting switching voltage regulator circuit has realistic meaning and real value to reduce phase line steady-state current.
As shown in Figure 1, the low power consumption power supply circuit design of current comparative maturity is to use AC/DC Switching Power Supplies and MOSFET
The mode that pipe is combined.In such design scheme, MOSFET pipes play the role of switch, and control AC/DC Switching Power Supplies open
Dynamic and stopping.When breaker is under combined floodgate on-state, the output level of control line becomes 0V if there is arrearage.At this point,
CPU sends out order and opens MOSFET pipes to start the DC power supply that AC/DC Switching Power Supplies export power supply machine, and driving motor makes open circuit
Device dropout separating brake.After the completion of the whole process of equal dropouts, CPU sends out order and closes MOSFET pipes to stop AC/DC Switching Power Supplies,
To achieve the effect that reduce power consumption, and then meets the steady-state current consumed per phase line after control unit combined floodgate or separating brake and exist
Standard requirement under 120% voltage less than 0.2mA.
However, the circuit structure of such technical solution is sufficiently complex, the driving circuit for designing special MOSFET is needed, because
And lead to poor reliability, of high cost.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide the external breakers of novel electric energy meter
Control system and its PSR reverse exciting switching voltage regulator circuits, the control system for solving the external breaker of electric energy meter in the prior art
The problems such as reliability is low, of high cost.
In order to achieve the above objects and other related objects, the present invention provides a kind of PSR reverse exciting switching voltage regulators circuit, including：
PSR power supply chips and its application circuit, wherein the PSR power supply chips have been internally integrated AC/DC Switching Power Supplies and MOSFET
Pipe, and the drain electrode of the MOSSFET pipes forms the SW pins of the PSR power supply chips.
In one embodiment of the invention, the application circuit includes：It is series between power end VDD and ground terminal GND1
Capacitance C1, wherein the anode of the C1 is connected with the power end VDD, and the cathode of the C1 is connected with the ground terminal GND1；
Diode D1 and resistance R1, wherein the anode of the diode D1 with the ends J1 of input ac power for being connected, two pole
The cathode of pipe D1 is connected with one end of the resistance R1, and the other end of the R1 is connected with the power end VDD；Diode D2,
Wherein, the anode of the diode D2 is connected with the ground terminal GND1, the cathode and input ac power of the diode D2
The ends J2 be connected；Varistor VR1 is parallel between the ends J1 of the input ac power and the ends J2.
In one embodiment of the invention, the application circuit includes：Resistance R2, resistance R3, diode D3 and capacitance C2,
In, one end of the resistance R2 is connected with power end VDD, and the other end is connected with one end of the resistance R3, the resistance R3's
The other end is connected with the cathode of the diode D3, and the capacitance C2 is parallel to the both ends the resistance R2；High frequency transformer T1,
In, the both ends of the armature winding of the high frequency transformer T1 are connected with the power end VDD and the SW pins respectively, and described
One end that the anode of capacitance C2 connect the SW pins with the armature winding is connected；The auxiliary winding of the high frequency transformer T1
One end be connected with the GND pin of the PSR power supply chips, and access the ground terminal GND1 together；Diode D4, resistance R4
With capacitance C3, wherein the anode of the diode D4 is connected with the other end of the auxiliary winding, the cathode of the diode D4
Be connected with one end of the resistance R4, the other end of the resistance R4 respectively with the VCC pin of the PSR power supply chips, described
The anode of capacitance C3 is connected, and the cathode of the capacitance C3 is connected with the ground terminal GND1；Resistance R6 and resistance R7, wherein institute
The one end for stating resistance R6 is connected with the other end of the auxiliary winding, and the other end of the resistance R6 is respectively with the resistance R7's
One end, the FB pins of the PSR power supply chips are connected, and the other end of the resistance R7 accesses the ground terminal GND1；Resistance R5,
One end is connected with the CS pins of the PSR power supply chips, and the other end accesses the ground terminal GND1.
In one embodiment of the invention, the application circuit further includes：Secondary windings, the diode D5 of high frequency transformer T1
With capacitance C4, wherein the both ends of the secondary windings are connected with the anode of the diode D5, ground terminal GND respectively, the electricity
The anode for holding C4 is connected and is formed with the cathode of the diode D5 to be connect described in the cathode access of output end VOUT, the capacitance C4
Ground terminal GND.
In one embodiment of the invention, the application circuit further includes：Resistance R8 and capacitance C5, wherein the resistance R8
One end for being connect with outer CPU circuit, the other end of the resistance R8 respectively with the ends ZC of the PSR power supply chips, institute
The one end for stating capacitance C5 is connected, and the other end of the capacitance C5 accesses the ground terminal GND.
In one embodiment of the invention, it is connected by inductance L1 between the ground terminal GND1 and the ground terminal GND.
In order to achieve the above objects and other related objects, the present invention provides a kind of external breaker control system of electric energy meter,
Including：As above any PSR reverse exciting switching voltage regulator circuits.
In one embodiment of the invention, the control system further includes：Input power module, linear power supply module, CPU moulds
Block and motor driving motor power module, wherein the output end of the input power module and the PSR reverse exciting switching voltage regulators
The first input end of circuit is connected；Second input terminal of the output end of the CPU module and the PSR reverse exciting switching voltage regulators circuit
It is connected；The output end of the PSR reverse exciting switching voltage regulators circuit is connected with the input terminal of the motor driving motor power module.
In one embodiment of the invention, when the external breaker needs divide-shut brake to act, the CPU module output
The input of PCON=0, the ZC pins are 0, to the PSR power supply chips normal work；When the external breaker is completed
When divide-shut brake acts, the CPU module exports PCON=1, and the input of the ZC pins is 1, to the PSR power supply chips
Shutdown, is stopped.
In one embodiment of the invention, when the MOSFET pipes inside the PSR power supply chips are connected, the high frequency transformation
The armature winding of device T1 stores energy as inductance；When MOSFET pipes inside the PSR power supply chips turn off, the high frequency
Transformer T1 works as transformer, and the energy of the armature winding storage is exported by the high frequency transformer T1.
In one embodiment of the invention, the PSR power supply chips are controlled whether according to the voltage swing of the CS pins
Shutdown output, the resistance R5 are used to be arranged the preset value of input current, described when input current is more than the preset value
The shutdown output of PSR power supply chips.
As described above, referring to Fig. 2, the present invention is by the way that AC/DC and MOSFET pipes to be integrated in same power supply chip simultaneously
PSR reverse exciting switching voltage regulator circuits are constituted, the complexity of the external breaker control system circuit structure of electric energy meter is greatly reduced, reaches
It is improved to reliability, the effect of cost reduction, while also complying with the stable state electricity consumed per phase line after control unit combined floodgate or separating brake
Flow the national standard for being less than 0.2mA under 120% voltage.
Description of the drawings
Fig. 1 is shown as the function structure chart of the external breaker control system of electric energy meter in the prior art.
Fig. 2 is shown as the function structure chart of the external breaker control system of low-power consumption electric energy meter of the present invention.
Fig. 3 is shown as the principle schematic of the low-power consumption PSR reverse exciting switching voltage regulator circuits of the present invention.
Fig. 4 is shown as overvoltage protection in PSR reverse exciting switching voltage regulators circuit of the present invention, input rectifying filtering, current-limiting protection
Electrical block diagram.
Fig. 5 is shown as over-pressed buffering in PSR reverse exciting switching voltage regulators circuit of the present invention, high frequency transformer, PSR power supply chips
Power supply, feedback regulating circuit structural schematic diagram.
Fig. 6 is shown as the output rectifier and filter structural schematic diagram in PSR reverse exciting switching voltage regulators circuit of the present invention.
Fig. 7 is shown as the power control circuit structural schematic diagram in PSR reverse exciting switching voltage regulators circuit of the present invention.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that the diagram provided in following embodiment only illustrates the basic structure of the present invention in a schematic way
Think, component count, shape and size when only display is with related component in the present invention rather than according to actual implementation in schema then
Draw, when actual implementation kenel, quantity and the ratio of each component can be a kind of random change, and its assembly layout kenel
It is likely more complexity.
The AC/DC control technologies of primary side feedback (PSR) are the new A C/DC control technologies to grow up between nearest 10 years,
Compared with the optocoupler of traditional secondary side feedback adds 431 structure, maximum advantage be to eliminate the two chips and with
Cooperating one group of component, which offers a saving the spaces on system board, reduce cost and improve system
Reliability.Referring to Fig. 2, the present invention proposes a kind of external breaker control system of novel electric energy meter, include mainly：Input electricity
Source module 201, linear power supply module 202, CPU module 203, PSR reverse exciting switching voltage regulators module 204 and motor driving and motor
Power module 205.Unlike the prior art shown in FIG. 1, the present invention manages inverse-excitation type AC/DC Switching Power Supplies and MOSFET
It is integrated in same power supply chip (such as：MOSFET pipes circuit structure is integrated in AC/DC switching power source chips), it greatly reduces
The complexity of circuit, achieve the effect that reliability improve, cost reduction, while also complied with control unit close a floodgate or separating brake after it is every
The steady-state current of phase line consumption is less than the national standard of 0.2mA under 120% voltage.
The circuit theory of the super low-power consumption PSR reverse exciting switching voltage regulator modules of the present invention is as shown in figure 3, include by Fig. 4 institutes
Overvoltage surge protection circuit, input rectifying filter circuit, current limiting short circuit protection circuit, the overvoltage buffering electricity as shown in Figure 5 shown
Road, high frequency transformer, the power supply of PSR power supply chips and feedback regulating circuit, output rectifier and filter as shown in Figure 6, and
Output voltage adjustment circuit as shown in Figure 7.The circuit structure of various pieces will be described in detail below.
Fig. 4 shows the circuit structure with overvoltage surge protection, input rectifying filtering and current limiting short circuit protection function, tool
Body：Overvoltage surge protection circuit is realized using varistor VR1；In 1 end input AC 220V AC of connecting terminal J
Power supply, when on the power cord at 1 end due to thunder or other situations occur high pressure or lightning stroke when, VR1 can fast conducting, energy of releasing
Amount, voltage clamping in certain voltage, protects the circuit of rear end without damage；Diode D1 and D2 composition halfwave rectifier electricity
Road, the voltage commutation of AC220V at half-wave pulsating volage；C1 is the filter capacitor after rectification, and half-wave pulsating volage is filtered into
One DC voltage；R1 plays the role of the current limit and short-circuit protection of circuit.
As VDD and GND1 short circuits, electric current will become very big, and the heat of resistance R1 will become larger, and burn-out resistance R1 plays protection
The not impaired effect of subsequent conditioning circuit.Meanwhile resistance R1 series connection is in circuit, according to Ohm's law, electric current will also subtract in circuit
It is small, to play metering function.
Fig. 5 shows the circuit knot with over-pressed buffering, the power supply of high frequency transformation, PSR power supply chips and feedback regulation function
Structure, specifically：
Resistance R2, capacitance C2, resistance R3 and the over-pressed buffer circuit of diode D3 compositions, due to drawing in inverse excitation type converter
The main reason for playing switching tube damage is that leakage inductance causes switching tube collector voltage to increase suddenly when switching tube turns off, so must
Over-pressed buffer circuit must be designed come the energy for the overvoltage that dissipates.
The VCC supply voltages (1 foot) of PSR power supply chips U1 by high frequency transformer T1 auxiliary winding (3 feet~4 foot), two
Pole pipe D4, resistance R4 and capacitance C3 compositions, wherein 3 foot of auxiliary winding is grounded, and diode D4, resistance R4 are passed through in the output of 4 feet successively
With capacitance C3, obtained DC power supply is as the power supply VCC needed for the U1 work of PSR power supply chips.VCCs of the resistance R4 in chip U1
There is certain shock resistance and jamproof effect in current supply circuit, generally take 10R or so.
Voltage detection circuit is made of auxiliary winding, resistance R6 and resistance R7.It considers：Flyback switching based on SSR
Power supply is to first pass through optocoupler to detect output voltage situation and feed back to adjust output voltage, optocoupler sheet again after PWM power supplys IC
The service life of body is shorter and cost is higher, the present invention use PSR flyback power supplies, not from output directly sampling, but be changed to from
Ancillary coil samples, and by calculating secondary coil situation, further extrapolates output voltage.The voltage of auxiliary winding output passes through
The FB feedback ends (3 foot) of input power chip U1 after resistance R6 and resistance R7 is divided, to be adjusted by internal circuit calculating
Output voltage.The auxiliary winding of the present invention not only provided power supply to U1, but also was feedback regulation output voltage.
The armature winding (1 foot~2 foot) of high frequency transformer T1, the main electricity of the higher-order of oscillation of power supply chip U1 composition Switching Power Supplies
Road, wherein 1 foot of armature winding connects power vd D, and 2 feet connect drain electrode, that is, power supply core of MOSFET pipes inside power supply chip U1
The SW feet of piece U1.Inside U1 when the conducting of MOSFET pipes, the armature winding of transformer T1 stores energy as inductance；Inside U1
When MOSFET pipes turn off, transformer T1 is used as transformer, and the energy of armature winding storage is led to energy by transformer T1
Cross secondary windings output.Resistance R5 is used for being arranged input current size, and electric current flows through the ends CS (4 of the control source U1 of R5 generations
Foot).U1 controls whether shutdown output according to the voltage at the ends CS, and R5 is for limiting input current.When input current is more than certain
When value, U1 exports shutdown.Switch power source output voltage is 0, to play a protective role.
As shown in fig. 6, the output rectifier and filter of PSR Switching Power Supplies is by secondary windings (5 feet~8 foot), diode D5
It is formed with capacitance C4, wherein D5 is halfwave rectifier diode, output voltage is rectified into half-wave pulsating volage, capacitance C4 is filter
Wave capacitance, pulsation voltage filter at a DC voltage.
When U1 internal switch pipes are connected, PSR reverse exciting switching voltage regulators convert electrical energy into magnetic energy, are stored in the first of transformer
In grade winding.At this point, 8 feet of secondary windings are negative, 5 feet just, diode plays the role of reverse bias shutdown.When U1 internal switch pipes
When shutdown, primary current is turned off.Since inductive current cannot be mutated, inductive drop is reversed, and the primary of transformer T1 senses
Secondary, 8 feet of secondary windings just, 5 feet it is negative, diode forward biasing conducting to capacitance C4 chargings and provides energy to load.
The control circuit of power supply is shown in Fig. 7, is mainly made of resistance R8, capacitance C5.Capacitance C5, which has been used to filter, to be made
With preventing the random of PSR power supply chips U1 to be turned on and off；Resistance R8 plays the role of limiting electric current, on the one hand reduces power consumption,
On the other hand protection PSR power supply chip U1, avoid input current excessive and damage.
When input terminal PCON is 0, the ends ZC (2 foot) of U1 are 0, power supply chip U1 normal works；When input terminal PCON is
When high level, the ends ZC of U1 are high level, and power supply chip U1 shutdowns are stopped.U1 is when being stopped, entire PSR power supplys
Electric current will be very low, meet less than 0.2mA requirement.It is connected by inductance L1 between two ground terminals GND and GND1, is played
Anti-Jamming.
In conclusion the external breaker control system of electric energy meter and its PSR reverse exciting switching voltage regulator circuits of the present invention, disconnected
When road device needs divide-shut brake to act, CPU exports PCON=0, and Switching Power Supply is made to work, after waiting breakers to complete divide-shut brake action,
CPU exports PCON=1, turns off the switch power supply, not only reduces the power consumption of whole system, also meets State Grid Corporation of China for electricity
Energy off-balancesheet sets the current power dissipation requirement of the entire controller of breaker, effectively overcomes various shortcoming in the prior art and has height
Spend industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (11)
1. a kind of PSR reverse exciting switching voltage regulators circuit, which is characterized in that including：PSR power supply chips and its application circuit, wherein institute
It states PSR power supply chips and has been internally integrated AC/DC Switching Power Supplies and MOSFET pipes, and the drain electrode of the MOSSFET pipes forms institute
State the SW pins of PSR power supply chips.
2. PSR reverse exciting switching voltage regulators circuit according to claim 1, which is characterized in that the application circuit includes：
The capacitance C1 being series between power end VDD and ground terminal GND1, wherein anode and the power end VDD of the C1
It is connected, the cathode of the C1 is connected with the ground terminal GND1；
Diode D1 and resistance R1, wherein the anode of the diode D1 is described for being connected with the ends J1 of input ac power
The cathode of diode D1 is connected with one end of the resistance R1, and the other end of the R1 is connected with the power end VDD；
Diode D2, wherein the diode D2 anode be connected with the ground terminal GND1, the cathode of the diode D2 and
The ends J2 of input ac power are connected；
Varistor VR1 is parallel between the ends J1 of the input ac power and the ends J2.
3. PSR reverse exciting switching voltage regulators circuit according to claim 1 or 2, which is characterized in that the application circuit includes：
Resistance R2, resistance R3, diode D3 and capacitance C2, wherein one end of the resistance R2 is connected with power end VDD, another
End is connected with one end of the resistance R3, and the other end of the resistance R3 is connected with the cathode of the diode D3, the capacitance
C2 is parallel to the both ends the resistance R2；
High frequency transformer T1, wherein the both ends of the armature winding of the high frequency transformer T1 respectively with the power end VDD and institute
It states SW pins to be connected, and positive one end for connecting the SW pins with the armature winding of the capacitance C2 is connected；The height
One end of the auxiliary winding of frequency power transformer T1 is connected with the GND pin of the PSR power supply chips, and accesses the ground terminal together
GND1；
Diode D4, resistance R4 and capacitance C3, wherein the other end phase of the anode and the auxiliary winding of the diode D4
Even, the cathode of the diode D4 is connected with one end of the resistance R4, and the other end of the resistance R4 is electric with the PSR respectively
The VCC pin of source chip, the anode of the capacitance C3 are connected, and the cathode of the capacitance C3 is connected with the ground terminal GND1；
Resistance R6 and resistance R7, wherein one end of the resistance R6 is connected with the other end of the auxiliary winding, the resistance R6
The other end be connected respectively with the FB pins of one end of the resistance R7, the PSR power supply chips, the other end of the resistance R7
Access the ground terminal GND1；
Resistance R5, one end are connected with the CS pins of the PSR power supply chips, and the other end accesses the ground terminal GND1.
4. PSR reverse exciting switching voltage regulators circuit according to claim 3, which is characterized in that the application circuit further includes：It is high
Secondary windings, diode D5 and the capacitance C4 of frequency power transformer T1, wherein
The both ends of the secondary windings are connected with the anode of the diode D5, ground terminal GND respectively, the anode of the capacitance C4
It is connected with the cathode of the diode D5 and the cathode for forming output end VOUT, the capacitance C4 accesses the ground terminal GND.
5. PSR reverse exciting switching voltage regulators circuit according to claim 4, which is characterized in that the application circuit further includes：Electricity
Hinder R8 and capacitance C5, wherein
One end of the resistance R8 for being connect with outer CPU circuit, the other end of the resistance R8 respectively with the PSR power supplys
The ends ZC of chip, one end of the capacitance C5 are connected, and the other end of the capacitance C5 accesses the ground terminal GND.
6. PSR reverse exciting switching voltage regulators circuit according to claim 5, which is characterized in that the ground terminal GND1 with it is described
It is connected by inductance L1 between ground terminal GND.
7. a kind of external breaker control system of electric energy meter, which is characterized in that including：As described in any in claim 1 to 6
PSR reverse exciting switching voltage regulator circuits.
8. the external breaker control system of electric energy meter according to claim 7, which is characterized in that further include：Input power
Module, linear power supply module, CPU module and motor driving motor power module, wherein
The output end of the input power module is connected with the first input end of the PSR reverse exciting switching voltage regulators circuit；
The output end of the CPU module is connected with the second input terminal of the PSR reverse exciting switching voltage regulators circuit；
The output end of the PSR reverse exciting switching voltage regulators circuit is connected with the input terminal of the motor driving motor power module.
9. the external breaker control system of electric energy meter according to claim 8, which is characterized in that
When the external breaker needs divide-shut brake to act, the CPU module exports PCON=0, the input of the ZC pins
It is 0, to the PSR power supply chips normal work；
When the external breaker completes divide-shut brake action, the CPU module exports PCON=1, the input of the ZC pins
It is 1, to which the PSR power supply chips shutdown is stopped.
10. the external breaker control system of electric energy meter according to claim 8, which is characterized in that
When MOSFET pipes inside the PSR power supply chips are connected, the armature winding of the high frequency transformer T1 is as inductance
Store energy；
When MOSFET pipes inside the PSR power supply chips turn off, the high frequency transformer T1 works as transformer, described
The energy of armature winding storage is exported by the high frequency transformer T1.
11. the external breaker control system of electric energy meter according to claim 8, which is characterized in that the PSR power supply chips
Control whether that shutdown output, the resistance R5 are used to be arranged the default of input current according to the voltage swing of the CS pins
Value, when input current is more than the preset value, the PSR power supply chips shutdown output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054182.4A CN108347179B (en) | 2017-01-24 | 2017-01-24 | External circuit breaker control system of electric energy meter and PSR flyback switching power supply circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710054182.4A CN108347179B (en) | 2017-01-24 | 2017-01-24 | External circuit breaker control system of electric energy meter and PSR flyback switching power supply circuit thereof |
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| CN108347179B CN108347179B (en) | 2021-06-11 |
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| CN105281588A (en) * | 2015-07-20 | 2016-01-27 | 浙江利尔达物联网技术有限公司 | High-precision primary side feedback-type power supply module and control method thereof |
| CN205406426U (en) * | 2016-02-03 | 2016-07-27 | 胡成飞 | Miniature circuit breaker electric operating mechanism's standby power consumption control circuit |
| CN106208758A (en) * | 2016-08-02 | 2016-12-07 | 成都零智慧科技有限公司 | A kind of instantaneous protection type PWM inverse-excitation type switch power-supply |
| CN106094657A (en) * | 2016-08-19 | 2016-11-09 | 德力西电气有限公司 | The breaker controller circuit of a kind of low-power consumption automatic reclosing and control method |
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