CN104655890B - Charger electronic load control protection electric circuit - Google Patents
Charger electronic load control protection electric circuit Download PDFInfo
- Publication number
- CN104655890B CN104655890B CN201510090797.3A CN201510090797A CN104655890B CN 104655890 B CN104655890 B CN 104655890B CN 201510090797 A CN201510090797 A CN 201510090797A CN 104655890 B CN104655890 B CN 104655890B
- Authority
- CN
- China
- Prior art keywords
- circuit
- triode
- operational amplifier
- electronic load
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000033228 biological regulation Effects 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 claims description 11
- 230000003750 conditioning effect Effects 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 2
- 230000032683 aging Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The embodiments of the invention provide a kind of charger electronic load control protection electric circuit, when effectively improving in the prior art using load, the problem of effective utilization rate of electrical is relatively low.Charger electronic load control protection electric circuit in the embodiment of the present invention; including for the sensor signal size control circuit by adjusting transducer range control electric current size; the DC voltage pressure limiting point control circuit of balance is kept for control voltage; for driving the linearly increasing soft start protection circuit of dutycycle in load startup control system, and for controlling the exchange output constant power of constant power output to adjust circuit；The sensor signal size control circuit, the soft start protection circuit and the exchange output constant power regulation circuit are connected with the DC voltage pressure limiting point control circuit.The charger electronic load control protection electric circuit is simple in construction, ingenious in design, have matched the charge characteristic of charger well, significantly improves utilization rate of electrical, easy to implement, application easy to spread.
Description
Technical field
The present invention relates to control technology field, in particular to a kind of charger electronic load control protection electric circuit.
Background technology
Electronic load or the load of common heating luminous formula are the equipment that electric energy is consumed by dissipated power, are widely used in
In every field, designer it has been investigated that, during using electronic load, effective utilization rate of electrical is relatively low in many cases, such as：
When be used to carry out charger burn-in test, because electric automobile battery charger power is big, conventional electronic load power is smaller, no
The characteristic of the high-tension high-power of electric automobile battery charger is adapted to, it is conventional when particularly charger is operated in limited current state
Constant current electronic load can not match, if increasing electronic load current, constant voltage source is in limited current state, two electric currents are all
Adjusting, due to C-V characteristic unlike resistive load is linear, output voltage can drawn very low, make power drop a lot, nothing
Method reaches the effect of perfect condition peak power aging.
The content of the invention
In view of this, the purpose of the embodiment of the present invention is to provide a kind of charger electronic load control protection electric circuit, with
The problem of improvement is when using electronic load in the prior art, and effective utilization rate of electrical is relatively low.
To achieve these goals, the technical scheme that the embodiment of the present invention uses is as follows：
In a first aspect, the embodiments of the invention provide a kind of charger electronic load control protection electric circuit, including for leading to
The sensor signal size control circuit of transducer range control electric current size is overregulated, the straight of balance is kept for control voltage
Voltage pressure limiting point control circuit is flowed, for the control drive when loading startup and the exchange output constant power adjusts circuit with institute
The linearly increasing soft start protection circuit of dynamic dutycycle, and for controlling the exchange output constant power of constant power output to adjust electricity
Road；
The sensor signal size control circuit, the soft start protection circuit state DC voltage pressure limiting point control circuit
It is connected.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the first of first aspect, wherein, institute
Stating sensor signal size control circuit includes current sensor HR, and emitter stage passes through resistance R72 and the current sensor HR
It is connected, the triode Q11 of grounded collector, the series connection bleeder circuit being connected with the base stage of the triode Q11, the direct current
Pressure pressure limiting point control circuit is connected with the current sensor HR.
With reference to the first possible embodiment of first aspect, the embodiments of the invention provide second of first aspect
Possible embodiment, wherein, the series connection bleeder circuit includes the current potential that movable contact is connected with the base stage of the triode Q11
Device VR4, the divider resistance being connected between one of fixed contact of the potentiometer VR4 and the current sensor HR
R70, the divider resistance R67B being connected between another fixed contact of the potentiometer VR4 and the current sensor HR.
With reference to second of possible embodiment of first aspect, the embodiments of the invention provide the third of first aspect
Possible embodiment, wherein, the sensor signal size control circuit is also connected to the resistance R72 and institute including one end
State between current sensor HR, the resistance R75 that the other end is grounded by potentiometer VR5.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 4th of first aspect kind, wherein, institute
Stating DC voltage pressure limiting point control circuit includes the output end phase of operational amplifier U3, VA input and the operational amplifier U3
Multiplier U4 even, operational amplifier U2, COMP input that in-phase input end is connected with the output end of the multiplier U4 and
The connected Sine Pulse Width Modulation control chip U1 of the output end of the operational amplifier U2, and with the operational amplifier
The connected voltage attenuation circuit of U3 in-phase input end, the sensor signal size control circuit and the operational amplifier U2
Inverting input be connected, the soft start protection circuit and the operational amplifier U3 in-phase input end, the multiplier
U4 IAC inputs are connected with the SOFTSTART inputs of the SPWM control chips U1, and the exchange output constant power is adjusted
Economize on electricity road is connected with the VRMS inputs of the multiplier U4 and the inverting input of the operational amplifier U2.
With reference to the 4th kind of possible embodiment of first aspect, the embodiments of the invention provide the 5th of first aspect kind
Possible embodiment, wherein, the voltage attenuation circuit is connected including movable contact with the input of the operational amplifier U3
Potentiometer VR3, the divider resistance R27, the potentiometer VR3 being connected with one of fixed contact of the potentiometer VR3
Another fixed contact ground connection.
With reference to the 4th kind of possible embodiment of first aspect, the embodiments of the invention provide the 6th of first aspect kind
Possible embodiment, wherein, the soft start protection circuit includes the homophase input of emitter stage and the operational amplifier U3
End is connected, the triode Q2 of grounded collector, and base stage is connected with the base stage of the triode Q2, emitter stage and the multiplier U4
IAC inputs be connected, the triode Q3 of grounded collector, colelctor electrode and the triode Q2 base stage, the triode Q3
Base stage be connected with the SOFTSTART inputs of the SPWM control chips U1, the triode Q1 of grounded emitter, one end with
The colelctor electrode of the triode Q1 is connected, the electric capacity C3, the triode Q1 of the other end ground connection base stage and switching on and shutting down signal are defeated
Sending end connects.
With reference to the 4th kind of possible embodiment of first aspect, the embodiments of the invention provide the 7th of first aspect kind
Possible embodiment, wherein, the exchange output constant power regulation circuit includes in-phase input end and the multiplier U4's
VRMS inputs connected operational amplifier U9, base stage is connected with the output end of the operational amplifier U9, grounded collector
Triode Q4, the triode Q4 emitter stage are connected by resistance R56 with the inverting input of the operational amplifier U2.
With reference to the 7th kind of possible embodiment of first aspect, the embodiments of the invention provide the 8th of first aspect kind
Possible embodiment, wherein, the exchange output constant power regulation circuit also includes being connected to the operational amplifier U9's
Electric capacity C2 between in-phase input end and ground, the resistance R1 being connected between the VRMS inputs and ground of the multiplier U4.
With reference to the 4th kind~the 8th kind of first aspect any one possible embodiment, the embodiments of the invention provide
9th kind of possible embodiment of first aspect, wherein, the IAC inputs and VRMS inputs of the multiplier U4 by every
It is electrically connected from amplifying circuit G and city.
In the embodiment of the present invention, dexterously there is provided sensor signal size control circuit, soft start protection circuit, exchange
Output constant power adjusts circuit and DC voltage pressure limiting point control circuit, and several circuits cooperate and ensure that charger and electronics
Perfect cooperation is loaded, output voltage will not decline much when being in limited current state such as charger, and decline a little reaches equalization point i.e.
Stop, and then the peak power aging for making charger be under limited current state, significantly improve utilization rate of electrical.
Further, in the embodiment of the present invention, to sensor signal size control circuit, soft start protection circuit, exchange
Output constant power adjusts circuit and the circuit structure of DC voltage pressure limiting point control circuit has carried out ingehious design, using less
Component realizes utilization rate of electrical maximumlly while ensure that circuit reliability of operation, meets actual demand.
Further, charger electronic load control protection electric circuit in the embodiment of the present invention is simple in construction, it is easy to implement,
Utilization rate of electrical can be significantly improved, security reliability, meets actual demand, there is prominent substantive distinguishing features and marked improvement,
It is adapted to large-scale promotion application.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
Obtain it is clear that or being understood by implementing the embodiment of the present invention.The purpose of the embodiment of the present invention and other advantages can pass through
Realize and obtain in the specification, claims and accompanying drawing write.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by embodiment it is required use it is attached
Figure is briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not construed as pair
The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other related accompanying drawings.
A kind of structured flowchart for charger electronic load control protection electric circuit that Fig. 1 is provided by the embodiment of the present invention；
A kind of circuit diagram for sensor signal size control circuit that Fig. 2 is provided by the embodiment of the present invention；
A kind of circuit diagram for DC voltage pressure limiting point control circuit that Fig. 3 is provided by the embodiment of the present invention；
A kind of circuit diagram for soft start protection circuit that Fig. 4 is provided by the embodiment of the present invention；
A kind of exchange output constant power that Fig. 5 is provided by the embodiment of the present invention adjusts the circuit diagram of circuit；
A kind of circuit diagram for charger electronic load control protection electric circuit that Fig. 6 is provided by the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Generally exist
The component of the embodiment of the present invention described and illustrated in accompanying drawing can be configured to arrange and design with a variety of herein.Cause
This, the detailed description of the embodiments of the invention to providing in the accompanying drawings is not intended to limit claimed invention below
Scope, but it is merely representative of the selected embodiment of the present invention.Based on embodiments of the invention, those skilled in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
Embodiment
Electric automobile battery charger power is generally between 8KW~50KW, and because power is larger, enterprise is carried out always before dispatching from the factory
Need very high current when changing test, when have high current by when, electric wire and each equipment can produce larger heat so that aging room temperature
Degree is higher, has not only wasted electric energy but also dangerous, and often power is smaller for conventional electronic load, it is impossible to adapts to electric automobile battery charger
High-tension high-power characteristic, particularly charger will be operated in limited current state, and the load of conventional constant current electronic can not match,
If electronic load high current, then constant voltage source can be made to be in limited current state, two equipment adjust electric current simultaneously, output
Voltage is drawn very low, is made power drop a lot, is not reached the effect of perfect condition peak power aging, causes great wave
Take.
Based on this, as shown in figure 1, the embodiments of the invention provide a kind of charger electronic load control protection electric circuit, bag
Include for the sensor signal size control circuit 100 by adjusting transducer range control electric current size, for control voltage
The DC voltage pressure limiting point control circuit 101 of balance is kept, for linearly increasing in load startup control system driving dutycycle
Soft start protection circuit 103, and for controlling the exchange output constant power of constant power output to adjust circuit 102；The sensing
Device signal magnitude control circuit 100, the soft start protection circuit 103 with it is described exchange output constant power regulation circuit 102 it is equal
It is connected with the DC voltage pressure limiting point control circuit 101.
In above-mentioned, the specific implementation of each circuit has a variety of, and one of which, this implementation are provided in the embodiment of the present invention
In example, the implementation of each circuit includes but is not limited in the following manner.
As shown in Fig. 2 the embodiments of the invention provide the realization of one of which sensor signal size control circuit 100 electricity
Road, the sensor signal size control circuit 100 include current sensor HR, and emitter stage passes through resistance R72 and the electric current
Sensor HR is connected, the triode Q11 of grounded collector, the series connection bleeder circuit being connected with the base stage of the triode Q11, institute
DC voltage pressure limiting point control circuit 101 is stated with the current sensor HR to be connected.
Wherein, the series connection bleeder circuit includes the potentiometer VR4 that movable contact is connected with the base stage of the triode Q11,
The divider resistance being connected between one of fixed contact of the potentiometer VR4 and the current sensor HR power supplies+15V
R70, the partial pressure electricity being connected between another fixed contact of the potentiometer VR4 and the current sensor HR power supplies -15V
Hinder R67B.
Based on foregoing circuit structure, the realization principle of sensor signal size control circuit 100 is as follows：
Divider resistance R70, potentiometer VR4 and divider resistance R67B composition series connection bleeder circuits, respective resistance selection have
It is a variety of, such as：The suitable resistance for choosing divider resistance R70, potentiometer VR4 and divider resistance R67B, make potentiometer VR4 center
Point voltage arrives+5V or so in -0.7V or so, so that triode Q11 emitter voltage is in 0~5.7V or so.Because electric current passes
Sensor HR is current mode, and induced voltage has relation with additional load resistance, and load current is small, and induced voltage is just small, flows through
Resistance R72 electric current is bigger, and the current signal amplitude induced is bigger, changes terminal voltage under resistance R72 and also just changes stream
Electric current through resistance R72, terminal voltage is higher under resistance R72, and the voltage of resistance R72 upper ends is higher, and resistance R72 resistances are constant,
Pass through the voltage swing for changing the voltage of resistance R72 lower ends so as to which control electric current sensor HR is induced.Indirectly also just change
Current sensor HR range, so as to easily control the size of cut-off current, so as to control watt level.According to U=
IR, when triode Q11 base voltages are in more than 5.6V, current sensor HR maximums induced voltage is equal to I* (R75+VR5), and three
When pole pipe Q11 launches extremely 0V, current sensor HR minimum induced voltages are (R75+VR5) * R72/ (R72+VR5+R72).
During implementation, triode Q11 is preferably connected into common collector, emitter follower form, triode Q11 emitter stage electricity
What pressure substantially changed with base voltage and synchronously changed, base voltage is about -0.7V when potentiometer VR4 is transferred to bottom,
Emitter voltage is about 0V, and at this time current sensor HR is maximum range, when potentiometer VR4 is transferred to the top, triode
Q11 base voltages will exceed current signal voltage, and for triode Q11 base voltages because emitter junction is diode characteristic, base stage is electric
Pressure will not channel to current signal end, and resistance R72 does not have electric current substantially, is not involved in signal attenuation, and triode Q11 emitter stage has two
Pole pipe isolation characteristic, it effectively ensure that the high voltage of base stage does not interfere with current sensor HR signal and normally exported.
In order to ensure the stability of circuit operation, preferably described sensor signal size control circuit 100 also includes one end
It is connected between the resistance R72 and the current sensor HR, the resistance R75 that the other end is grounded by potentiometer VR5.
Wherein, resistance R75 and potentiometer VR5 coordinates, and can set initial minimum current, current sensor HR is not located
In Light Condition.
As shown in figure 3, the embodiments of the invention provide the realization of one of which DC voltage pressure limiting point control circuit 101 electricity
Road, the DC voltage pressure limiting point control circuit 101 include operational amplifier U3, and input is connected with the operational amplifier U3
Multiplier U4, the operational amplifier U2 that in-phase input end is connected with the multiplier U4, input and the operational amplifier
The connected Sine Pulse Width Modulation control chip U1 of U2 output end, and declined with the operational amplifier U3 voltages being connected
Powered down road, the sensor signal size control circuit 100 is connected with the inverting input of the operational amplifier U2, described soft
Starting protection circuit 103 is connected with the operational amplifier U3, the multiplier U4 and the SPWM control chips U1, described
Exchange output constant power regulation circuit 102 is connected with the multiplier U4 and the operational amplifier U2.
Wherein, the voltage attenuation circuit includes the potentiometer that movable contact is connected with the input of the operational amplifier U3
VR3, the divider resistance R27, the potentiometer VR3 being connected with one of fixed contact of the potentiometer VR3 another
Fixed contact is grounded.
Based on foregoing circuit structure, the realization principle of DC voltage pressure limiting point control circuit 101 is as follows：
Divider resistance R27 and potentiometer VR3 constitute DC voltage attenuator circuit, signal through operational amplifier U3 amplifiers at
Multiplier U4 input VA is sent to after reason, multiplier U4 two other input connects city's electric-examination by isolating amplifier circuit G
Survey, in general, multiplier U4 output be equal to VA be multiplied by IAC again divided by VRMS square, multiplier U4 output MULT
OUT is connected to operational amplifier U2 in-phase input end, and current sensor HR connects operational amplifier U2 inverting input, and computing is put
Big device U2 output control SPWM control chips U1 SPWM signals.
When input direct voltage is higher than setting value normal range (NR), operational amplifier U3 exports a fixed voltage, is fully loaded with
Work, when input direct voltage is less than setting value, operational amplifier U3 output voltages will be made to multiply by certain slope drop-out voltage
Musical instruments used in a Buddhist or Taoist mass U4 output voltage amplitude reduces, and then operational amplifier U2 output amplitude is also reduced, so that SPWM waveforms account for
Sky reduces power output, DC current reduces, this mode than reducing so that input direct voltage will not reduce a lot, protect
Hold poised state.
As shown in figure 4, the embodiments of the invention provide the circuit of realizing of one of which soft start protection circuit 103, it is described
Soft start protection circuit 103 is connected including emitter stage with the input of the operational amplifier U3, the triode of grounded collector
Q2, base stage is connected with the base stage of the triode Q2, emitter stage is connected with the input of the multiplier U4, grounded collector
Triode Q3, colelctor electrode and triode Q2 base stage, the base stage of the triode Q3 and the SPWM control chips U1
Input is connected, the triode Q1 of grounded emitter, and one end is connected with the colelctor electrode of the triode Q1, the other end is grounded
Electric capacity C3.
Based on foregoing circuit structure, the realization principle of soft start protection circuit 103 is as follows：
Triode Q1 base stage connects switching on and shutting down signal delivery end, and in the power-offstate, triode Q1 is conducting, now electric
Hold C3 both ends no-voltage, triode Q2 conductings turn on input direct voltage test side voltage pull-down, triode Q3 test side
Drag down, set low multiplier U4 output, operational amplifier U2 outputs are low, and SPWM control chips U1 COMP ends are set low, SPWM
Control chip U1 exports without driving；After start, triode Q1 cut-offs, electric capacity C3 both end voltages are by inside SPWM control chips U1
Constant-current source is charged, and electric capacity C3 both end voltages are linearly increasing by 0V to 5V, when triode Q1 base voltage is higher than emitter stage
During voltage, triode Q2 and triode Q3 make multiplier U4 output end slowly be increased by 0V, SPWM controls by being conducting to cut-off
Chip U1 COMP terminal voltages also slowly increase, so as to realize that control SPWM control chips U1 driving dutycycle slowly increases,
Play a part of soft start.
Empirical tests, if being not added with soft start protection circuit 103, then under off-mode, multiplier U4 output is always
High level, depends merely on that SPWM control chips U1 SOFT/START pin soft start effects are bad, and SPWM control chips U1 driving accounts for
Sky than is not increased by minimal linear, easy impulse interference wave switch pipe so that switching tube transformer stress is big during startup, easily burns pipe
Son, by test comparison, there is no sound substantially when adding soft start protection circuit 103 to start, drive waveforms are by 0V balance and stability lines
Property increase, fault rate is extremely low.
As shown in figure 5, the embodiments of the invention provide the realization electricity of one of which exchange output constant power regulation circuit 102
Road, the exchange output constant power regulation circuit 102 are connected including in-phase input end with the VRMS inputs of the multiplier U4
Operational amplifier U9, base stage is connected with the output end of the operational amplifier U9, the triode Q4 of grounded collector, described three
Pole pipe Q4 emitter stage is connected by resistance R56 with the inverting input of the operational amplifier U2.
In order to ensure the stability of circuit operation, preferably described exchange output constant power regulation circuit 102 also includes connection
Electric capacity C2 between the in-phase input end and ground of the operational amplifier U9, it is connected to the VRMS inputs of the multiplier U4
Resistance R1 between ground.
Based on foregoing circuit structure, the realization principle of exchange output constant power regulation circuit 102 is as follows：
Line voltage is processed into the voltage with current sensor HR matchings by operational amplifier U9, when line voltage is low,
Triode Q4 is fully on, and it is maximum to flow through resistance R56 electric current, make ac output current line voltage than it is relatively low when alternating current
Stream is maximum, keeps AC power not diminish, and when line voltage is high, triode Q4 cut-offs, no current flows through resistance R56, makes friendship
Stream electric current diminishes, and keeps the invariable power of exchange.
Empirical tests, if being not added with exchanging output constant power regulation circuit 102, then when line voltage deviation height changes
When, AC power will change, and when line voltage is low, AC power is small, when line voltage is high, output power, be unfavorable for
The steady operation of electronic load.
When implementing, preferably multiplier U4 input is electrically connected by isolating amplifier circuit G and city.
By being adjusted to sensor signal size control circuit 100, soft start protection circuit 103, exchange output constant power
The circuit structure of circuit 102 and DC voltage pressure limiting point control circuit 101 carries out ingehious design, is ensured using less component
Circuit reliability of operation, realizes the maximization of utilization rate of electrical, meets actual demand.
As shown in fig. 6, one of which sensor signal size control circuit 100, soft is additionally provided in the embodiment of the present invention
The connection of starting protection circuit 103, exchange output constant power regulation circuit 102 and DC voltage pressure limiting point control circuit 101 is shown
It is intended to.
In the embodiment of the present invention, dexterously there is provided sensor signal size control circuit 100, soft start protection circuit
103rd, output constant power regulation circuit 102 and DC voltage pressure limiting point control circuit 101 are exchanged, several circuits, which cooperate, to be ensured
Charger and electronic load perfect matching, output voltage will not decline much when being in limited current state such as charger, decline one
Point reaches equalization point and stopped, and then the peak power aging for making charger be under limited current state, significantly improves utilization of power
Rate.
Part auxiliary circuit, component and line are also associated with the basis of foregoing circuit, in the embodiment of the present invention, is used
In the normal operation for ensureing circuit, the use of these auxiliary circuits and component belongs to the circuit application habit of industry universal, and
For the technology that this area is more ripe, will not be repeated here.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (10)
1. a kind of charger electronic load control protection electric circuit, it is characterised in that including for by adjusting transducer range control
The sensor signal size control circuit of size of current processed, the DC voltage pressure limiting point for keeping balance for control voltage control electricity
Road, for driving the linearly increasing soft start protection circuit of dutycycle in load startup control system, and for controlling invariable power
The exchange output constant power regulation circuit of output；
The sensor signal size control circuit, the soft start protection circuit exchange output constant power regulation circuit with described
It is connected with the DC voltage pressure limiting point control circuit.
2. charger electronic load control protection electric circuit according to claim 1, it is characterised in that the sensor signal
Size control circuit includes current sensor HR, and emitter stage is connected by resistance R72 with the current sensor HR, colelctor electrode connects
The triode Q11 on ground, the series connection bleeder circuit being connected with the base stage of the triode Q11, the DC voltage pressure limiting point control
Circuit is connected with the current sensor HR.
3. charger electronic load control protection electric circuit according to claim 2, it is characterised in that the series connection partial pressure electricity
Road includes the potentiometer VR4 that movable contact is connected with the base stage of the triode Q11, is connected to wherein the one of the potentiometer VR4
Divider resistance R70 between individual fixed contact and the current sensor HR, another for being connected to the potentiometer VR4 are fixed
Divider resistance R67B between contact and the current sensor HR.
4. charger electronic load control protection electric circuit according to claim 3, it is characterised in that the sensor signal
Size control circuit is also connected between the resistance R72 and the current sensor HR including one end, the other end passes through current potential
The resistance R75 of device VR5 ground connection.
5. charger electronic load control protection electric circuit according to claim 1, it is characterised in that the DC voltage limit
Pressure point control circuit includes the multiplier that operational amplifier U3, VA input is connected with the output end of the operational amplifier U3
U4, operational amplifier U2, the COMP input that in-phase input end is connected with the output end of the multiplier U4 are put with the computing
The Sine Pulse Width Modulation control chip U1 that big device U2 output end is connected, and it is same mutually defeated with the operational amplifier U3
Enter the connected voltage attenuation circuit in end, the sensor signal size control circuit and the anti-phase input of the operational amplifier U2
End is connected, and the soft start protection circuit inputs with the in-phase input end of the operational amplifier U3, the IAC of the multiplier U4
End is connected with the SOFTSTART inputs of the SPWM control chips U1, the exchange output constant power regulation circuit and institute
The VRMS inputs for stating multiplier U4 are connected with the inverting input of the operational amplifier U2.
6. charger electronic load control protection electric circuit according to claim 5, it is characterised in that the voltage attenuation electricity
Road includes the potentiometer VR3 that is connected with the in-phase input end of the operational amplifier U3 of movable contact, with the potentiometer VR3 its
In connected the divider resistance R27, the potentiometer VR3 of fixed contact another fixed contact ground connection.
7. charger electronic load control protection electric circuit according to claim 5, it is characterised in that the soft start protection
Circuit is connected including emitter stage with the in-phase input end of the operational amplifier U3, the triode Q2 of grounded collector, base stage with
The base stage of the triode Q2 is connected, emitter stage is connected with the IAC inputs of the multiplier U4, the triode of grounded collector
Q3, colelctor electrode and triode Q2 base stage, the base stage of the triode Q3 and the SPWM control chips U1
SOFTSTART inputs are connected, the triode Q1 of grounded emitter, and one end is connected with the colelctor electrode of the triode Q1, is another
The electric capacity C3, the triode Q1 of one end ground connection base stage are connected with switching on and shutting down signal delivery end.
8. charger electronic load control protection electric circuit according to claim 5, it is characterised in that the exchange output is permanent
Power conditioning circuitry includes the operational amplifier U9 that is connected with the VRMS inputs of the multiplier U4 of in-phase input end, base stage and
The output end of the operational amplifier U9 is connected, the triode Q4 of grounded collector, and the emitter stage of the triode Q4 passes through electricity
Resistance R56 is connected with the inverting input of the operational amplifier U2.
9. charger electronic load control protection electric circuit according to claim 8, it is characterised in that the exchange output is permanent
Power conditioning circuitry also includes the electric capacity C2 being connected between the in-phase input end and ground of the operational amplifier U9, is connected to institute
State the resistance R1 between multiplier U4 VRMS inputs and ground.
10. the charger electronic load control protection electric circuit according to claim 5~9 any one, it is characterised in that institute
The IAC inputs and VRMS inputs for stating multiplier U4 are electrically connected by isolating amplifier circuit G and city.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090797.3A CN104655890B (en) | 2015-02-28 | 2015-02-28 | Charger electronic load control protection electric circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090797.3A CN104655890B (en) | 2015-02-28 | 2015-02-28 | Charger electronic load control protection electric circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104655890A CN104655890A (en) | 2015-05-27 |
| CN104655890B true CN104655890B (en) | 2017-11-24 |
Family
ID=53247259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510090797.3A Expired - Fee Related CN104655890B (en) | 2015-02-28 | 2015-02-28 | Charger electronic load control protection electric circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104655890B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253887A (en) * | 2016-07-28 | 2016-12-21 | 苏州律力电子科技有限公司 | A kind of soft start switch Circuits System |
| CN116880639B (en) * | 2023-09-07 | 2023-11-24 | 广东东菱电源科技有限公司 | Circuit for realizing constant power by using triode and constant power method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1175815A (en) * | 1996-08-02 | 1998-03-11 | 欧姆龙公司 | Load control device |
| CN2605982Y (en) * | 2003-04-03 | 2004-03-10 | 深圳市珊星电脑有限公司 | Alarming protector for injection machine load controlling circuit |
| RU92286U1 (en) * | 2009-11-05 | 2010-03-10 | Открытое акционерное общество "Корпорация "Тактическое ракетное вооружение" | ELECTRONIC LOAD ASSEMBLY |
| CN101782630A (en) * | 2010-02-25 | 2010-07-21 | 北京航空航天大学 | Electronic load controller with constant current and constant power |
| CN204389553U (en) * | 2015-02-28 | 2015-06-10 | 米祥丽 | Charging set electronic load control protection electric circuit |
-
2015
- 2015-02-28 CN CN201510090797.3A patent/CN104655890B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1175815A (en) * | 1996-08-02 | 1998-03-11 | 欧姆龙公司 | Load control device |
| CN2605982Y (en) * | 2003-04-03 | 2004-03-10 | 深圳市珊星电脑有限公司 | Alarming protector for injection machine load controlling circuit |
| RU92286U1 (en) * | 2009-11-05 | 2010-03-10 | Открытое акционерное общество "Корпорация "Тактическое ракетное вооружение" | ELECTRONIC LOAD ASSEMBLY |
| CN101782630A (en) * | 2010-02-25 | 2010-07-21 | 北京航空航天大学 | Electronic load controller with constant current and constant power |
| CN204389553U (en) * | 2015-02-28 | 2015-06-10 | 米祥丽 | Charging set electronic load control protection electric circuit |
Non-Patent Citations (1)
| Title |
|---|
| 能量回馈型电力电子负载的控制方法;单任仲 等;《中国电机工程学报》;20100625;第30卷(第18期);第62-66页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104655890A (en) | 2015-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206301737U (en) | The drive device of relay and the automobile with it | |
| CN106300964B (en) | Independent charge and discharge sequential single-inductance double-output switch converters method for controlling frequency conversion and its device | |
| CN204391679U (en) | A kind of leakage current detection protection circuit | |
| CN104655890B (en) | Charger electronic load control protection electric circuit | |
| CN105916241B (en) | Auxiliary power circuit, LED drive circuit, LED driver | |
| CN106992668A (en) | A kind of alternating current-direct current Mixed design dc source | |
| CN107834634A (en) | A kind of charging current limiter circuit for energy-storage battery group management system and the energy-storage battery group management system comprising charging current limiter circuit | |
| CN205657888U (en) | Auxiliary power circuit , LED drive circuit , LED driver | |
| CN202008814U (en) | Driving circuit and liquid crystal television | |
| CN204389553U (en) | Charging set electronic load control protection electric circuit | |
| CN203504787U (en) | Electromagnetic heating circuit and electric pressure cooker | |
| CN103792452A (en) | Superimposed alternating voltage test tester for automobile low-voltage electric appliance | |
| CN108594082A (en) | A kind of alternating current power-off signal transmission circuit and method | |
| CN103944147B (en) | A kind of protective circuit of switch power source and its control method | |
| CN102545855B (en) | Power switch tube drives method and system based on closed loop control | |
| CN103220857B (en) | A kind of LED constant-current control circuit | |
| CN209198534U (en) | A kind of zero cross detection circuit and device | |
| CN206250972U (en) | BOOST booster circuits and supply unit | |
| CN201440168U (en) | E-load machine | |
| CN103825590B (en) | Amplitude-modulated wave double-side PWM signal generation circuit with preset modulation degree | |
| CN205336140U (en) | Low -power consumption power compensating power supply circuit | |
| CN104569857A (en) | Design method of alternative load meter and test tool thereof | |
| CN206060527U (en) | Buffer circuit and circuit of power factor correction in circuit of power factor correction | |
| CN105699911B (en) | Power source loads test device | |
| CN209298949U (en) | A kind of battery low-voltage protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160927 Address after: 2, No. 338, No. 13, Lianhua street, No. 450000, Lianhua street, Zhengzhou hi tech Industrial Development Zone, Henan, 9 Applicant after: HENAN KAIMENG ELECTRONIC TECHNOLOGY CO.,LTD. Address before: 475000 Henan province city of Qixian County Lake Township left Wacun 3 groups 13 Applicant before: Mi Xiangli |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171124 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |