CN207408504U - A kind of load detecting circuit and electronic equipment - Google Patents
A kind of load detecting circuit and electronic equipment Download PDFInfo
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- CN207408504U CN207408504U CN201721274009.7U CN201721274009U CN207408504U CN 207408504 U CN207408504 U CN 207408504U CN 201721274009 U CN201721274009 U CN 201721274009U CN 207408504 U CN207408504 U CN 207408504U
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Abstract
The utility model is related to load detecting technical field, more particularly to a kind of load detecting circuit and electronic equipment.Wherein, the load detecting circuit, applied to load circuit, load circuit includes silicon controlled module and load, and silicon controlled module and the load in series, load detecting circuit include：Modular converter, in parallel with silicon controlled module；Control module is connected with modular converter.By the silicon controlled module for adjusting load circuit, the operating mode of load can be adjusted, modular converter can sample the current detection signal for flowing through load, control module is according to the working condition of current detection signal and silicon controlled module, determine the working condition of load circuit, it therefore, can be according to the corresponding load detecting control logic of operating mode flexible configuration of load.
Description
Technical field
The utility model is related to load detecting technical field, more particularly to a kind of load detecting circuit and electronic equipment.
Background technology
Load control is the final purpose of all kinds of electronic intelligence control products.It is existing to realize the state-detection to load
Technology is the Series detectors resistance in load circuit, when the load current of load circuit flows through the detection resistance, by negative to this
It carries electric current to be sampled, then sampling current is amplified processing, so that subsequent step is by analyzing amplified current signal
Determine load condition.
Generally, different loads, operating mode can be different.Such as：It is heater for load, is resistance
Silk heating, the operating mode of the heater is all-wave operating mode, that is,：All power can be converted into thermal energy by it.For
It loads as engine, in order to control the rotational frequency of engine, engine is generally operational in phase controlling operating mode, so as to spirit
The rotational frequency of adjustment engine living.
Inventor in the implementation of the present invention, it is found that the prior art has at least the following problems：When loaded work piece exists
Under the variable load circuit of operating mode, traditional technology has not been able to effectively be detected it.
Utility model content
One purpose of the utility model embodiment is intended to provide a kind of load detecting circuit and electronic equipment, solves to pass
System technology there is technical issues that the load configuration for having not been able to be operated in different working modes is corresponding.
In order to solve the above technical problems, the utility model embodiment provides following technical scheme：
In a first aspect, a kind of load detecting circuit of the utility model embodiment offer, described negative applied to load circuit
Carrying circuit includes silicon controlled module and load, and the silicon controlled module and the load in series, the load detecting circuit include：
Modular converter, in parallel with the silicon controlled module；Control module is connected with the modular converter.
Optionally, the silicon controlled module includes bidirectional triode thyristor and trigger circuit；The bidirectional triode thyristor includes first
Main terminal, the second main terminal and control terminal, the modular converter be connected to first main terminal and second main terminal it
Between, described load one end is connected with second main terminal, the load other end ground connection, the control terminal and the triggering electricity
The output terminal connection on road, the input terminal of the trigger circuit are used for input control signal.
Optionally, the modular converter includes：Optocoupler unit, for sampling the current detecting letter for flowing through the load circuit
Number, the optocoupler unit output terminal is connected with the control module；Current limiting unit, for limiting the electricity for flowing through the optocoupler unit
Stream, the current limiting unit output terminal is connected with the optocoupler unit input terminal, and the current limiting unit input terminal is connected to described the
One main terminal.
Optionally, the optocoupler unit includes the first optocoupler and first resistor, one end of the first optocoupler primary side and institute
Current limiting unit connection is stated, the other end of the first optocoupler primary side is connected to second main terminal, first optical coupling secondary edges
One end be connected with external power supply, the other ends of first optical coupling secondary edges respectively with one end of the first resistor and the control
Molding block connects, the other end ground connection of the first resistor.
Optionally, the modular converter further includes：Protection location is connected to second main terminal and the limit
Between flowing the first node between unit and the optocoupler unit, for carrying out clamper to the input voltage of the optocoupler unit.
Optionally, the optocoupler unit includes the second optocoupler, the 3rd optocoupler, second resistance and 3rd resistor；Described second
One end of optocoupler primary side is connected with the current limiting unit, the other end of the second optocoupler primary side and the 3rd optical coupling secondary edges
One end connects, and one end of second optical coupling secondary edges is connected to external power supply, the other ends of second optical coupling secondary edges respectively with
One end of the second resistance is connected with the control module, the other end ground connection of the second resistance, the 3rd optocoupler pair
The other end on side is connected to second main terminal, and one end of the 3rd optocoupler primary side is connected to the one of the 3rd resistor
End, the other end of the 3rd resistor are connected to external power supply, and the other end of the 3rd optocoupler primary side is connected to the control
Module.
In second aspect, the utility model embodiment provides a kind of electronic equipment, and the electronic equipment includes any one institute
The load detecting circuit stated.
In each embodiment of the utility model, by adjusting the silicon controlled module of load circuit, load can be adjusted
Operating mode, modular converter is in parallel with silicon controlled module, can sample the current detection signal for flowing through load, control module
According to the working condition of current detection signal and silicon controlled module, the working condition of load circuit is determined, it therefore, being capable of root
According to the corresponding load detecting control logic of the operating mode flexible configuration of load.
Description of the drawings
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not formed to embodiment, the element for having same reference numbers label in attached drawing are expressed as similar element, remove
Non- have a special statement, and composition does not limit the figure in attached drawing.
Fig. 1 is that the utility model embodiment provides a kind of application scenarios schematic diagram for detecting refrigerator load；
Fig. 2 is current waveform schematic diagram when the utility model embodiment provides a kind of heater work；
Fig. 3 a are current waveform schematic diagrames when the utility model embodiment provides a kind of engine work；
Fig. 3 b are current waveform schematic diagrames when the utility model embodiment provides another engine work；
Fig. 4 is that the utility model embodiment provides a kind of functional block diagram of load-detecting system；
Fig. 5 is that a kind of each signal waveform of the loaded work piece of the utility model embodiment offer under all-wave operating mode is shown
It is intended to；
Fig. 6 is that the utility model embodiment provides a kind of each signal wave of loaded work piece under phase controlling operating mode
Shape schematic diagram；
Fig. 7 is that the utility model embodiment provides a kind of structure diagram of load detecting circuit；
Fig. 8 is that the utility model embodiment provides a kind of structure diagram of control module；
Fig. 9 is that the utility model embodiment provides a kind of structure diagram of load-detecting system；
Figure 10 is that another embodiment of the utility model provides a kind of structure diagram of load-detecting system；
Figure 11 is that the utility model embodiment provides a kind of simple alternating current of loaded work piece under phase controlling operating mode
Signal waveforms；
Figure 12 is that the utility model still another embodiment provides a kind of structure diagram of load-detecting system；
Figure 13 is that the utility model still another embodiment provides a kind of structure diagram of load-detecting system；
Figure 14 is that the utility model embodiment provides a kind of flow diagram of load detection method；
Figure 15 is that the utility model embodiment provides a kind of flow diagram of step 62；
Figure 16 is that another embodiment of the utility model provides a kind of flow diagram of step 62；
Figure 17 is that the utility model still another embodiment provides a kind of flow diagram of step 62；
Figure 18 is that the utility model embodiment provides a kind of flow diagram of step 63.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only explaining this
Utility model is not used to limit the utility model.
The detection of load circuit is that product realizes an intelligentized embodiment.In some product applications, load circuit bag
Load and the switch module with load in series are included, the work shape of load can be controlled by the on off state for controlling switch module
State.However, in some product applications, due to the product working time is long or other extraneous factors and cause the load of product
Circuit is in abnormality, and product often has not been able to detect the abnormality of load circuit in time and can not be precisely accomplished follow-up
Control logic.For example, for refrigerator, controller needs to detect the working condition of compressor, so that user is prompted to reprocess in time
Or perform the control logic of follow-up function module.
Fig. 1 is that the utility model embodiment provides a kind of application scenarios schematic diagram for detecting refrigerator load.As shown in Figure 1,
The load of refrigerator herein is compressor 11, by controlling the closure or off-state of switch 12, can correspond to control compressor
11 working condition, so that power supply 13 provides electric current for compressor 11, wherein, compressor 11 is flowed through in the acquisition of conversion circuit 14
Forceful electric power, and strong and weak isolation processing is carried out, weak electric signal is sent to control circuit 15, control circuit 15 is according to weak electric signal and opens
The on off state for closing 12 is judged to switch 12 actual working states with compressor 11.When control circuit 15 judge switch 12 or
When compressor 11 is in abnormality, control circuit 15 starts warning circuit 16 and alarms, so that user is in time by compressor
11 reprocess.Alternatively, when control circuit 15 judges that switch 12 and compressor 11 are all in normal condition, control circuit 15 can be with
The execution of follow-up control logic is completed, for example, showing current refrigerator normal operation by display 17.
Therefore, by setting load detecting circuit, the problem of can finding load circuit in time, and automatically process and ask
Topic, so as to fulfill intelligent product.
Above-described embodiment is merely given as a kind of type of attachment of load circuit.In some embodiments, in load circuit
Switch and the connection mode of load, quantity, control logic are different.But the load in load circuit is all according to switch
Working condition carry out corresponding work.
Above-described embodiment provides instruction and guide content of the load for compressor, and in many application scenarios, load can be any
The equipment or component of form, arrive greatly a machine tool, a resistance in small to one battery system, herein not to the tool of load
Body form makes any restrictions.
However, as previously mentioned, for component different in different product or product, different work can be operated in
Pattern.Such as：For heater above-mentioned and engine, heater is operated in all-wave operating mode, and engine is operated in
Phase control mode.For example：Referring to Fig. 2, the electricity that Fig. 2 is the utility model embodiment when providing a kind of work of heater
Flow waveform diagram.As shown in Fig. 2, envelope is sinusoidal current waveform, heater is operated in all-wave operating mode, all-wave work
Pattern is used to indicate load 43 and is operated in full power state, therefore, full rate heater can be driven to work, and heater will
All power is converted into thermal energy, and therefore, heater is operated in full power state.It is this also referring to Fig. 3 a and Fig. 3 b, Fig. 3 a
Utility model embodiment provides current waveform schematic diagram during a kind of engine work, and Fig. 3 b are that the utility model embodiment provides
Another current waveform schematic diagram during engine work.As shown in Figure 3a, envelope is sinusoidal current waveform, and engine works
In phase controlling operating mode, phase controlling operating mode is used to indicate load 43 and is operated in power variable state.In each week
In phase during corresponding 30 degree of phase (corresponding to time point at this time as t1), driving current starts to input engine to drive engine work
Make.As shown in Figure 3b, within each cycle during corresponding 60 degree of phase (corresponding to time point at this time as t2, t2 is more than t1), driving
Electric current starts to input engine so that engine to be driven to work.
Therefore, in engineering practice process under normal circumstances, when the operating mode of load is all-wave operating mode, driving
The current waveform of load is continuous.When the operating mode of load is phase controlling operating mode, the current wave of driving load
Shape within each cycle all regularly discontinuously, also, the corresponding start-phase of interrupted current or terminal phase be it is adjustable, because
This, the power of driving load is variable.
Based on this, the utility model embodiment provides a kind of load-detecting system.Wherein, as shown in figure 4, the load detecting
System 40 includes load detecting circuit 41, silicon controlled module 42 and load 43, and load detecting circuit 41 and silicon controlled module 42 are simultaneously
Connection, silicon controlled module 42 are connected with load 43, wherein, silicon controlled module 42 forms load circuit with load 43, therefore, loads back
The working condition on road includes the load condition of load 43 and the on off state of silicon controlled module 42.
The working condition of silicon controlled module 42 includes conducting phase or off period, and load detecting circuit 41 can be to silicon-controlled mould
Block 42 sends control signal, and conducting phase or off period are operated in switch the silicon controlled module 42.When silicon controlled module 42 works
In the phase of conducting, when normal, external power supply is followed by silicon controlled module 42 and load 43, so as to which driving load 43 works.When
When silicon controlled module 42 is operated in the off period, when normal, external power supply followed by load detecting circuit 41 with load 43, because
This, load detecting circuit 41 can sample the current signal for flowing through load 43.Wherein, external power supply can be sinusoidal ac
Etc. other waveform alternating currents.
In some embodiments, which can also be sent by external control device, be not limited to control herein
The transmission main body of signal processed.
As previously described, because different loads have different operating modes, therefore, in the working condition of detection load circuit
When, first, load detecting circuit 41 determines the operating mode of load 43.Specifically, in some embodiments, load detecting circuit
41 can include user interface, and binary option can be presented in the user's interactive interface, are used to indicate user and select load
Operating mode, such as：Binary option is respectively " all-wave operating mode " and " phase controlling operating mode ", when user's selection is " complete
During ripple operating mode ", load detecting circuit 41 can determine that the operating mode of load 43 is " all-wave operating mode ".Work as user
When selecting " phase controlling operating mode ", load detecting circuit 41 can determine that the operating mode of load 43 is " phase controlling
Operating mode ".
Point unlike the embodiments above is：Load detecting circuit 41 can also automatically determine load 43 according to preset rules
Operating mode, the mode of operating mode for not determining load 43 to load detecting circuit 41 herein makes any restrictions.
Secondly, after load detecting circuit 41 determines the operating mode of load 43, load detecting circuit 41 is according to load 43
Operating mode, sampling flow through load 43 current detection signal.Wherein, the current detection signal include the first AC signal or
Second AC signal, first AC signal sampling when the working condition of silicon controlled module 42 is the conducting phase obtain, and second hands over
Signal sampling when the working condition of silicon controlled module is the off period is flowed to obtain.For example：Referring to Fig. 3 a, for one
The sinusoidal ac signal in a cycle, in time point t0 (ac zero-crossing point) between time t1, due to 42 work of silicon controlled module
Make in the off period, corresponding key player on a team's AC signals of t0 to t1 at this time can followed by load detecting circuit 41 and load 43,
Therefore, the corresponding key player on a team's AC signals of t0 to t1 can be understood as the second AC signal.Similarly, in time point t1 to time t3
In between (next ac zero-crossing point), since silicon controlled module 42 is operated in the conducting phase, the corresponding key player on a teams of t1 to t3 at this time
AC signal can be followed by silicon controlled module 42 and load 43, and therefore, the corresponding key player on a team's AC signals of t1 to t3 can be managed
It solves as the first AC signal.
As previously described, because load can be operated in different operating modes, silicon controlled module 42 can be entire sinusoidal
Always work at the conducting phase in whole cycles of AC signal, can also be operated within each cycle off period and conducting phase it
Set, therefore, for the purpose that the utility model embodiment is instructed and guided, 41 sample rate current of load detecting circuit detects the side of signal
Formula will be different.
For example：When the operating mode for loading 43 is all-wave operating mode, load detecting circuit 41 is according to load 43
All-wave operating mode, when the phase of AC signal is located at zero crossing, send first control signal to switch silicon controlled module
42 are operated in the off period.Further, when silicon controlled module 42 is operated in the off period, sampling flows through negative load detecting circuit 41
Carry 43 the second AC signal.
Referring to Fig. 5, when load detecting circuit 41 is in the ac zero-crossing point ta low level first control signals of transmission, it can
Control silicon module 42 is just operated in the off period.At this point, since silicon controlled module 42 is ended, then, in silicon controlled module 42 with bearing
When load 43 is all operated in normal condition, time point ta to corresponding sinusoidal current signal between tb is followed by load detecting circuit
41 with loading 43, and therefore, load detecting circuit 41 just samples the second AC signal for flowing through load 43, second AC signal
For time point ta to the corresponding high level signal of sinusoidal current signal between tb.However, in real process, silicon controlled module 42
Abnormality may be operated in load 43, such as：Silicon controlled module 42 or load 43 have been damaged, therefore, the second exchange
Signal can be low level.
Again for example：When the operating mode for loading 43 is all-wave operating mode, load detecting circuit 41 is according to load
43 all-wave operating mode, when the phase of AC signal is located at zero crossing, load detecting circuit 41 is sent out to silicon controlled module 42
It send second control signal and is operated in the conducting phase to switch silicon controlled module 42.Further, load detecting circuit 41 is silicon-controlled
When module 42 is operated in the conducting phase, sampling flows through the first AC signal of load 43.
Referring again to Fig. 5, silicon controlled module 42 all receives one as high electricity in place of the ac zero-crossing point of per half period
Flat second control signal, silicon controlled module 42 are switched the conducting phase that is operated in, such as：In the exchange of time point tb, tc, td
Zero point sends the second control signal of high level.It cycles according to this, then, entire sinusoidal ac signal being capable of continuous input load
43。
Again for example：When the operating mode for loading 43 is phase controlling operating mode, 41 basis of load detecting circuit
The phase controlling operating mode of load 43, ac zero-crossing point is in the pilot angle of silicon controlled module 42 in the phase of AC signal
Between when, sample the second AC signal.Wherein, which can determine according to the power demand of load.
Referring to Fig. 6, the pilot angle of the silicon controlled module 42 is 45 degree, wherein, the pilot angle corresponding time point is tg.
Load detecting circuit 41, which can be utilized, to be in silicon controlled module 42 in the off period, samples the second AC signal, that is,：Load inspection
Slowdown monitoring circuit 41 can be with time point tg to gathering the second AC signal between time point th.In silicon controlled module 42 and 43 work of load
In normal condition, the second AC signal flows through load detecting circuit 41 and load 43.In 43 works of silicon controlled module 42 or load
Make in abnormality, such as：Silicon controlled module 42 or load 43 have been damaged, and therefore, may not there is the second AC signal
Flow through load detecting circuit 41 and load 43.
Again for example：When the operating mode for loading 43 is phase controlling operating mode, 41 basis of load detecting circuit
The phase controlling operating mode of load 43 when the phase of AC signal is more than the pilot angle of silicon controlled module 42, sends the 3rd
Control signal is operated in the conducting phase to switch silicon controlled module 42.Further, load detecting circuit 41 is in silicon controlled module 42
When being operated in the conducting phase, sampling flows through the first AC signal of load 43.
Referring again to Fig. 6, silicon controlled module 42 all receives one as high level in place of the pilot angle of per half period
3rd control signal, silicon controlled module 42 are switched the conducting phase that is operated in, such as：The of high level is sent in time tj, tk, tl
Three control signals, are cycled according to this.
As previously mentioned, the working condition of load circuit includes the load condition of load 43 and the switch shape of silicon controlled module 42
State, further, loading 43 load condition includes normal condition and abnormality, and the on off state of silicon controlled module 42 includes
Normal condition and abnormality.
Silicon controlled module 42 or the normal condition of load 43 are understandable that with abnormality：
Based on the control logic of silicon controlled module 42, under normal control logic, controlled when silicon controlled module 42 receives
During signal, silicon controlled module 42 should be closure or disconnection.However, when silicon controlled module 42 occurs abnormal, control signal
Originally instruction switch is into closure state, and for silicon controlled module 42 but into off-state, switch at this time is abnormal.Together
Reason：Originally instruction silicon controlled module 42 but enters closure state to control signal into off-state, silicon controlled module 42, at this time
Silicon controlled module 42 be abnormal.
Based on load 43 control logic, under normal control logic, when load 43 reception electric power worked when, this
When load 43 working condition for normal condition, when loading 43 reception electric power and but having not been able to work, the work of load at this time
Make state as abnormality.Such as：Compressor 11 as shown in Figure 1 carries out refrigeration work when compressor 11 receives electric power, this
When compressor 11 working condition be normal condition.It but has not been able to carry out refrigeration work when compressor 11 receives electric power, at this time
Compressor 11 working condition be abnormality.
The normal work of silicon controlled module 42 and load 43 described in above-described embodiment can be understood as following system work
It is required that normally complete corresponding action.Such as：Silicon controlled module 42 indicates silicon controlled module as switch, load detecting circuit 41
During 42 disconnection, silicon controlled module 42 switches to off-state, and silicon controlled module 42 at this time is normal condition, otherwise similarly.Again
Such as：When loading 43 in normal operation, it can be worked according to the closure or off-state of silicon controlled module 42, when
When silicon controlled module 42 is closed, load 43 should be work, this is load 43 in normal operating conditions.When the switches are opened,
Load 43 should be off work, this is to load 232 in normal operating conditions, otherwise similarly.
Finally, load detecting circuit 41 determines negative according to the working condition of current detection signal and silicon controlled module 42
Carry the working condition in circuit.
Specifically, off period and the second AC signal are in be low level in silicon controlled module 42, load
Detection circuit 41 determines that on off state is abnormality or load condition is abnormality.Alternatively, at silicon controlled module 42
In the case that off period and the second AC signal are high level, load detecting circuit 41 determines that on off state is normal shape
State, and load condition is normal condition.For example：Referring again to Fig. 5, load detecting circuit 41 sends control signal instruction
Silicon controlled module 42 disconnects, that is,：Silicon controlled module 42 is in the off period, it is assumed that the working condition of silicon controlled module 42 is normal
State (disconnection), the working condition for loading 43 are normal condition (connection electric currents), and time point ta is electric to corresponding sine between tb
Signal is flowed followed by load detecting circuit 41 and load 43, and therefore, the second AC signal should be high level.It can however, working as
The working condition of control silicon module 42 is that the working condition of abnormality (closures) or load 43 is abnormality (turn-off current),
So, the second AC signal should be low level.Therefore, load detecting circuit 41 counter can release silicon controlled module 42 or load
43 working condition.It can similarly obtain, can also draw this conclusion with reference to Fig. 6, this will not be repeated here.
Further, it is on the phase in silicon controlled module 42 and the first AC signal is low level, bears
It carries detection circuit 41 and determines that on off state is normal condition.Alternatively, it is on phase and the first exchange in silicon controlled module 42
In the case that signal is high level, load detecting circuit 41 determines that on off state is abnormality.For example：Referring again to figure
5, load detecting circuit 41 sends control signal instruction silicon controlled module 42 and is closed, that is,：Silicon controlled module 42 is on the phase,
Assuming that the working condition of silicon controlled module 42 is normal condition (disconnection), the working condition for loading 43 is normal condition (connection electricity
Stream), time point tb to corresponding sinusoidal current signal between tc is not flowed through but followed by silicon controlled module 42 and load 43
Load detecting circuit 41, therefore, the first AC signal should be low levels.However, when the working condition of silicon controlled module 42 is
Abnormality (turn-off current), then, time point tb to corresponding sinusoidal current signal between tc is followed by load detecting electricity
Road 41 and load 43, therefore, the second AC signal should be high level.Therefore, load detecting circuit 41 counter can be released controllably
Silicon module 42 or the working condition of load 43.It can similarly obtain, can also draw this conclusion with reference to Fig. 6, this will not be repeated here.
To sum up, which can control according to the corresponding load detecting of operating mode flexible configuration of load
Logic.
Referring to Fig. 7, in some embodiments, which includes modular converter 411 and control module
412, modular converter 411 is in parallel with silicon controlled module 42, and control module 412 is connected with modular converter 411.
Modular converter 411 flows through the current detection signal of load circuit for sampling, and sends the electric current to control module
Detect signal.In some embodiments, the sinusoidal ac signal for flowing through load circuit can be converted to light current by modular converter 411
Signal, the weak electric signal can be high level or low level.The mode that modular converter 411 samples the sinusoidal ac signal is a variety of more
Sample can be：When the load 43 in load circuit works, the sinusoidal ac signal for flowing through load 43 simultaneously flows through modulus of conversion
Block 411, then, modular converter 411 can collect the sinusoidal ac signal.It can also：Modular converter 411 can pass through electricity
Flow sensor gathers the sinusoidal ac signal for flowing through load 43 indirectly.
Control module 412 is used to send control signal to silicon controlled module 42 and receives the current detection signal.As before
Described, which can include above-mentioned first control signal to the 3rd control signal, allow hand over silicon controlled module
42 working condition.The control signal is square-wave signal, which can be pulse width modulating signal (Pulse
Width Modulation, PWM), can also be pulse frequency modulated signal (Pulse frequency modulation,
PFM), control module 412 can send control signal according to the phase of sinusoidal ac signal, so as to adjust the power of load.
Further, referring to Fig. 8, the control module 412 include at least one processor 4121 and with it is described at least
The memory 4122 that one processor 4121 communicates to connect；Wherein, be stored with can be by described at least one for the memory 4122
The instruction that processor 4121 performs, described instruction is performed by least one processor 4121, so that at least one place
Reason device 4121 can be used in performing the control logic of the load detecting shown in above-mentioned each embodiment.
Referring to Fig. 9, silicon controlled module 42 includes bidirectional triode thyristor 421 and trigger circuit 422.Bidirectional triode thyristor 421 wraps
The first main terminal T1, the second main terminal T2 and control terminal G1 are included, modular converter 411 is connected to the first main terminal T1 and the second main side
Between sub- T2,43 one end of load are connected with the second main terminal T2, load 43 other ends ground connection, control terminal G1 and trigger circuit 422
Output terminal connection, the input terminal of trigger circuit 422 is used for input control signal EN.
Trigger circuit 422 includes silicon-controlled optocoupler U3, resistance R4, resistance R5, resistance R6 and triode Q1, silicon-controlled optocoupler
The first optocoupler main terminal of U3 is connected with control terminal G1, and the second optocoupler main terminal is connected with resistance R4 one end, the resistance R4 other ends
It is connected with the first main terminal T1, the first infrared diode terminal of silicon-controlled optocoupler U3 is connected with resistance R5 one end, and resistance R5 is another
One end is connected with external power supply, and the second infrared diode terminal is connected with the collector of triode Q1, the base stage of triode Q1 with
Resistance R6 one end connects, and the resistance R6 other ends are grounded for the emitter of input control signal EN, triode Q1.
It is double when control terminal G1 receives high level on the premise of bidirectional triode thyristor 421 is all worked normally with load 43
It is triggered and turns on to silicon-controlled 421, then, the electric current of external power supply flows through bidirectional triode thyristor 421 and load 43.Due to the electricity
Stream does not flow through modular converter 411, and therefore, the first AC signal that modular converter 411 is converted out is low level.When control terminal G1 connects
When receiving low level, bidirectional triode thyristor 421 is ended, and then, the electric current of external power supply flows through modular converter 411 and load 43,
Since the electric current flows through modular converter 411, the second AC signal that modular converter 411 is converted out is high level.
It is with embodiment difference shown in Fig. 9, as shown in Figure 10, modular converter 411 includes optocoupler unit 4111, limit
Stream unit 4112 and protection location 4113,4111 output terminal of optocoupler unit are connected with control module 412, and current limiting unit 4112 exports
End is connected with 4111 input terminal of optocoupler list, and 4112 input terminal of current limiting unit is connected to the first main terminal T1.Protection location 4113 connects
It is connected between the first node 1D between 4112 and 4111 optocoupler unit of the second main terminal T2 and current limiting unit, for light
The input voltage of coupling unit 4111 carries out clamper.
When control signal is for low level and when indicating that bidirectional triode thyristor 421 is operated in the off period, electric current flows through current limliting list
Member 4112, optocoupler unit 4111 and load 43, wherein, current limiting unit 4112 limits the electric current for flowing through optocoupler unit 4111, to protect
Protect optocoupler unit 4111.The electric current for flowing through itself is converted to the second AC signal by optocoupler unit 4111, wherein, second exchange
Signal is high level.In control logic, when the second AC signal is high level, illustrate bidirectional triode thyristor 421 and load 43
Normal condition is operated in, when the second AC signal is low level, illustrates that bidirectional triode thyristor 421 or load 43 are operated in abnormal shape
State.
When control signal is for high level and when indicating that bidirectional triode thyristor 421 is operated in the conducting phase, electric current flow through it is two-way can
Silicon 421 and load 43 are controlled, and has not been able to flow through current limiting unit 4112 and optocoupler unit 4111, therefore, optocoupler unit 4111 is converted
The first AC signal gone out is low level.In control logic, when the first AC signal is low level, illustrate bidirectional triode thyristor
421 to be operated in be normal condition with load 43, when the first AC signal is high level, illustrates that bidirectional triode thyristor 421 is operated in
Abnormality, it is normal condition that load 43, which is operated in,.
To sum up, on the one hand, the load detecting circuit 41 can realize the working condition of load circuit without amplifying circuit
Detection, therefore the simple science of structure of the load detecting circuit 41.On the other hand, load detecting circuit 41 need not pass through detection
Resistance carries out the sampling of load current, avoids heat caused by detection resistance and interferes with the detection of control module, so as to
Load detecting circuit 41 is made to work more reliable and more stable.
As previously mentioned, the present embodiment is operated in the off period using bidirectional triode thyristor 421, and pass through optocoupler unit 4111
Strong and weak buffer action exports the first AC signal or the second AC signal (high level or low level), and control module 412 is according to light current
Signal judges bidirectional triode thyristor 421 and the actual working state of load 43 with control signal.However, in the phase of conducting, it is two-way
Sinusoidal voltage corresponding to silicon-controlled 421 pilot angle should be more than the cut-in voltage of optocoupler unit 4111, so that double
When being operated in the off period to silicon-controlled 421, sinusoidal voltage can drive optocoupler unit 4111 to turn on, so as to promote optocoupler list
Sinusoidal voltage is converted into the second AC signal by member 4111.
Therefore, first, when load 43 is operated in phase controlling operating mode, control module 412 obtains optocoupler unit
4111 cut-in voltage Vth, wherein, the corresponding cut-in voltage of each type optocoupler unit can be built a voltage by user
Table, and be pre-stored on the memory 4122 of control module 412.During detection, control module 412 can search the voltmeter so as to
Obtain the cut-in voltage Vth of corresponding optocoupler unit 4111.
Secondly, control module 412 judges whether the corresponding alternating voltage V1 of the pilot angle of bidirectional triode thyristor 421 is more than optocoupler
The cut-in voltage Vth of unit 4111.If more than, when between ac zero-crossing point and the pilot angle of bidirectional triode thyristor, control module
412 receive the second AC signal that modular converter 411 samples.If being less than, exchange that control module 412 works from driving load 43
The 3rd AC signal more than or equal to cut-in voltage Vth is determined in drive signal.
Again, between ac zero-crossing point phase corresponding with the 3rd AC signal, control module 412 controls two-way controllable
Silicon 421 is operated in the off period.
Finally, control module 412 receives the second AC signal that modular converter 411 samples.
For example：It is that the utility model embodiment provides a kind of loaded work piece in phase controlling to please refer to Fig.1 1, Figure 11
Sinusoidal ac signal oscillogram under operating mode.As shown in figure 11, loaded work piece is under phase controlling operating mode, normal work
When making, load detecting circuit 41 sends the control signal of high level in pilot angle for 45 degree to bidirectional triode thyristor 421, and triggering is two-way
Silicon-controlled 421 are operated in the conducting phase, so that electric current driving load 43 works.
Cutting time point tm is described in detail for example to the positive half-wave between tn herein.The control of bidirectional triode thyristor 421
Angle processed is 45 degree, and the corresponding alternating voltage of pilot angle is V1, and the cut-in voltage Vth with optocoupler unit 4111 is determined in positive half-wave
Equal alternating voltage V2, then in positive half-wave determine more than optocoupler unit 4111 cut-in voltage Vth alternating voltage V3, because
This：
V1<Vth, Vth=V2, V2<V3
Since V1 is less than Vth, the alternating voltage of (bidirectional triode thyristor 421 is in the off period) has not been able between 0-V1
4111 work of optocoupler unit is driven, that is,：Optocoupler unit 4111 is sampled within the off period of bidirectional triode thyristor 421
Second AC signal is all low level, however, for testing goal, user is desirably：Within the off period, it is assumed that exclude two-way
Silicon-controlled 421 with outside 43 this uncertain factor of load, the second AC signal for being sampled can also be high level,
It being capable of veritably examinations purpose.
Therefore, when the corresponding alternating voltage V1 of pilot angle is more than the cut-in voltage Vth of optocoupler unit 4111, control module
412 between ac zero-crossing point and the pilot angle of bidirectional triode thyristor when, control module 412 receives that modular converter 411 samples
Two AC signals.
When the corresponding alternating voltage V1 of pilot angle is less than the cut-in voltage Vth of optocoupler unit 4111, control module 412 exists
Trigger signal just is sent to bidirectional triode thyristor 421 after V2, bidirectional triode thyristor 421 to be controlled to be operated in the conducting phase, that is, anti-mistake
Come, before v 2, bidirectional triode thyristor 421 always works at off period (in fact, under normal circumstances, section of bidirectional triode thyristor 421
Only the phase is before the corresponding alternating voltage V1 of pilot angle).Therefore, control module 412 can be in ac zero-crossing point and V2
Or between the corresponding phases of V3, the second AC signal that modular converter 411 samples is received, so as to be reliably carried out detection mesh
's.
Please referring to Fig.1 2, optocoupler unit 4111 includes the first optocoupler U1 and first resistor R1, and the one of the first optocoupler U1 primary sides
End is connected with current limiting unit 4112, and the other end of the first optocoupler U1 primary sides is connected to the second main terminal T2, the first optocoupler U1 secondary
One end be connected with external power supply VCC, the other end of the first optocoupler U1 secondary respectively with one end of first resistor R1 and control mould
Block 412 connects, the other end ground connection of first resistor R1.
Current limiting unit 4112 includes the 7th resistance R7, and it is former that the 7th resistance R7 is connected to the first main terminal T1 and the first optocoupler U1
Between the one end on side.
Protection location 4113 includes diode D1, and the anode of diode D1 is connected to the second main terminal T2, diode D1's
Cathode is connected to one end of the first optocoupler U1 primary sides.Diode D1 can carry out clamper to the input voltage of the first optocoupler U1.
When bidirectional triode thyristor 421 is closed, alternating current flows successively through bidirectional triode thyristor 421 and load 43.When it is two-way can
When controlling the disconnection of silicon 421, the alternating current of positive half cycle flows successively through the 7th resistance R7, the first optocoupler U1 and load 43, negative half period
Alternating current flows successively through load 43, diode D1 and the 7th resistance R7.
3 are please referred to Fig.1, in some embodiments, when not working in order to avoid load 43, load 43 disappears also in weak current
Consumption state, optocoupler unit 4111 is additionally operable to the 4th control signal EN2 sent in response to control module 412, to switch to difference
Working condition.For example, when the 4th control signal EN2 is high level, optocoupler unit 4111 is in cut-off working condition, at this time
Weak current have not been able to flow through load, so as to save power consumption.When the 4th control signal EN2 is low level, optocoupler unit 4111
Working condition is on, heavy current at this time flows through load.
Specifically, optocoupler unit 4111 includes the second optocoupler U2, the 3rd optocoupler U3, second resistance R2 and 3rd resistor R3.
One end of second optocoupler U2 primary sides is connected with current limiting unit 4112, the other end and the 3rd optocoupler U3 secondary of the second optocoupler U2 primary sides
One end connection, one end of the second optocoupler U2 secondary is connected to external power supply VCC, the other end of the second optocoupler U2 secondary respectively with
One end of second resistance R2 and control module 412 connect, the other end of second resistance R2 ground connection, the 3rd optocoupler U3 secondary it is another
End is connected to the second main terminal T2, and one end of the 3rd optocoupler U3 primary sides is connected to one end of 3rd resistor R3,3rd resistor R3's
The other end is connected to external power supply VCC, and the other end of the 3rd optocoupler U3 primary sides is connected to control module 412.
The other ends of 3rd optocoupler U3 primary sides receives the 4th control signal EN2, wherein, the 4th control signal EN2 controls the
The working condition of three optocoupler U3.For example, when the 4th control signal EN2 is high level, the 3rd optocoupler U3 is in cut-off work shape
State, weak current at this time has not been able to flow through load, so as to save power consumption.When the 4th control signal EN2 is low level, the second light
Coupling U2 and the 3rd optocoupler U3 are on working condition, and weak current at this time flows through load.
The utility model embodiment is expanded on further as another embodiment with reference to Figure 13, load detecting circuit is provided
Operation principle：
As previously mentioned, the normal control logic of bidirectional triode thyristor 421 includes：It is two-way when control signal EN1 is high level
Silicon-controlled 421 are closed；When control signal EN1 is low level, bidirectional triode thyristor 421 disconnects.Further, control module 412
Know following correspondence：When control signal EN1 is high level, bidirectional triode thyristor 421 should be closed；When control signal EN1 is
Low level, bidirectional triode thyristor 421 should disconnect.
Assuming that the bidirectional triode thyristor 421 in load circuit is operated in normal condition with load 43.Control module 412 was passed through
Zero detection, all sends the control signal EN1 (pwm signal) of high level in front at the zero crossing of two half-waves, then, it is two-way can
Control silicon 421 is operated in the conducting phase.At this point, the first AC signal of the second optocoupler U2 secondary output is low level.
In order to detect the bidirectional triode thyristor 421 in load circuit with load 43 with the presence or absence of failure, then, at the 3rd half
At first zero crossing of ripple, control module 412 sends control signal EN1 and the 4th control signal EN2, wherein, control signal
EN1 is high level, and the 4th control signal EN2 is low level.At this point, bidirectional triode thyristor 421, the second optocoupler U2 and the 3rd optocoupler
U3 is all turned on.Then, when it is low level that control module 412, which detects the first AC signal, control module 412 can determine
Bidirectional triode thyristor 421 is normal.However, when it is high level that control module 412, which detects the first AC signal DET, control
Module 412 can determine that bidirectional triode thyristor 421 is abnormal.
Then, control module 412 sends control signal EN1 and the 4th control signal EN2 again, wherein, control signal EN1
For low level, the 4th control signal EN2 is low level.At this point, bidirectional triode thyristor 421 ends, the second optocoupler U2 and the 3rd optocoupler
U3 is all turned on.Then, when it is low level that control module 412, which detects the second AC signal, control module 412 can determine
Bidirectional triode thyristor 421 is abnormal, alternatively, load 43 is abnormal.However, when control module 412 detects that the second exchange is believed
When number being high level, control module 412 can determine that bidirectional triode thyristor 421 is normal, and load 43 is also normal.
Finally, after user determines bidirectional triode thyristor 421 or loads 43 working condition, in order to save power consumption, then,
Control module 412 sends the 4th control signal EN2 of high level, and the 3rd optocoupler U3 at this time is in cut-off state, so as to avoid
Weak current flows through the phenomenon that load 43, saves power consumption.
In some embodiments, control module 22 can be general processor, digital signal processor (DSP), special collection
Into circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, divide
Any combinations of vertical nextport hardware component NextPort or these components.In addition, processor herein can be any conventional processors, control
Device, microcontroller or state machine.Control module 22 can also be implemented as the combination of computing device, for example, DSP and microprocessor
Combination, multi-microprocessor, one or more microprocessors combination DSP core or any other this configuration.
In the present embodiment, which can be applied in various types electronic equipment, so that the electronics
Equipment implements each purpose that the utility model embodiment is illustrated.
As the another aspect of the utility model embodiment, the utility model embodiment provides a kind of load detecting side
Method.The load detection method of the utility model embodiment can be in the electronic equipment of processor of the suitable type with operational capability
Middle execution, such as：Microcontroller, digital processing unit (Digital Signal Processing, DSP), programmable logic controller (PLC)
(Programmable Logic Controller, PLC) etc..
The corresponding function of load detection method of following each embodiments is that electronic equipment is stored in the form of instruction
On memory, when the corresponding function of the load detection method that perform following each embodiments, the processor of electronic equipment is visited
It asks memory, transfer and performs corresponding instruction, to realize the corresponding function of load detection method of following each embodiments.
Memory as a kind of non-volatile computer readable storage medium storing program for executing, available for storage non-volatile software program,
Non-volatile computer executable program and module, such as the work(of step corresponding to the load detection method in above-described embodiment
Energy.
Memory can include high-speed random access memory, can also include nonvolatile memory, for example, at least one
A disk memory, flush memory device or other non-volatile solid state memory parts.In some embodiments, memory is optional
Including compared with the remotely located memory of processor, these remote memories can pass through network connection to processor.It is above-mentioned
The example of network includes but not limited to internet, intranet, LAN, mobile radio communication and combinations thereof.
Described program instruction/module is stored in the memory, when being performed by one or more of processors,
The load detection method in above-mentioned any means embodiment is performed, for example, performing Figure 14 to Figure 18 institutes of following embodiment descriptions
The each step shown.
The load detection method is applied to load circuit, wherein, which can be described in above-mentioned each embodiment
Load circuit, this will not be repeated here.4 are please referred to Fig.1, which includes：
Step 61, the operating mode for determining load；
Step 62, the operating mode according to load, sampling flow through the current detection signal of load；
In step 62, the working condition of silicon controlled module includes conducting phase or off period, and current detection signal includes the
One AC signal or the second AC signal, the sampling when the working condition of silicon controlled module is the conducting phase of the first AC signal obtain
, the sampling when the working condition of silicon controlled module is the off period of the second AC signal obtains；
Step 63, the working condition according to current detection signal and silicon controlled module determine the work shape of load circuit
State.
It therefore, can be according to the corresponding load detecting control logic of operating mode flexible configuration of load.
In some embodiments, the operating mode of load includes all-wave operating mode, and all-wave operating mode is used to indicate negative
Load is operated in full power state.As shown in figure 15, step 62 includes：
Step 621, the all-wave operating mode according to load when the phase of AC signal is located at zero crossing, send first
Control signal is operated in the off period to switch silicon controlled module；
Step 623, sampling second AC signal.
In some embodiments, as shown in figure 16, step 62 further includes：
Step 622, the all-wave operating mode according to load when the phase of AC signal is located at zero crossing, send second
Control signal is operated in the conducting phase to switch silicon controlled module；
Step 624, the first AC signal of sampling.
It is with above-mentioned each embodiment difference, the operating mode of load includes phase controlling operating mode, phase control
Operating mode processed is used to indicate loaded work piece in power variable state.As shown in figure 17, step 62 includes：
Step 625, the phase controlling operating mode according to load are in ac zero-crossing point in the phase of AC signal and extremely may be used
When between the pilot angle of control silicon module, the second AC signal is sampled.
Step 627, the phase controlling operating mode according to load are more than the control of silicon controlled module in the phase of AC signal
During angle processed, send the 3rd control signal and be operated in the conducting phase to switch silicon controlled module；
Step 629, the first AC signal of sampling.
In some embodiments, the working condition of load circuit includes the load condition of the load and the silicon-controlled mould
The on off state of block.As shown in figure 18, step 63 includes：
Step 631 is in off period and the second AC signal to be low level in silicon controlled module, determines
On off state is abnormality or load condition is abnormality；
Step 632, in the case where silicon controlled module is in off period and the second AC signal as high level, determine
On off state is normal condition, and load condition is normal condition；
Step 633 is on phase and the first AC signal to be low level in silicon controlled module, determines
On off state is normal condition；
Step 634, in the case where silicon controlled module is on phase and the first AC signal as high level, determine
On off state is abnormality.
Since embodiment of the method and above-mentioned each embodiment are based on same design, in the not mutual conflicting premise of content
Under, the content of embodiment of the method can quote above-mentioned each embodiment, and this will not be repeated here.
As the another aspect of the utility model embodiment, the utility model embodiment provides a kind of non-transient computer
Readable storage medium storing program for executing, the non-transient computer readable storage medium storing program for executing are stored with computer executable instructions, and the computer can
It executes instruction that electronic equipment is made to perform any one of them load detection method.It can be according to the operating mode spirit of load
It is living to configure corresponding load detecting control logic.
Finally it should be noted that：Group can also be carried out between technical characteristic in above example or different embodiments
It closes, step can be realized with random order, and many other variations of the different aspect there are the utility model as described above,
For simplicity, they are not provided in details；Although the utility model is described in detail with reference to the foregoing embodiments,
It can still modify to the technical solution recorded in foregoing embodiments；And these are changed, and do not make relevant art side
The essence of case departs from the scope of each embodiment technical solution of the application.
Claims (7)
1. a kind of load detecting circuit, applied to load circuit, the load circuit includes silicon controlled module and load, it is described can
Control silicon module and the load in series, which is characterized in that the load detecting circuit includes：
Modular converter, in parallel with the silicon controlled module；
Control module is connected with the modular converter.
2. load detecting circuit according to claim 1, which is characterized in that
The silicon controlled module includes bidirectional triode thyristor and trigger circuit；
The bidirectional triode thyristor includes the first main terminal, the second main terminal and control terminal, and the modular converter is connected to described the
Between one main terminal and second main terminal, described load one end is connected with second main terminal, the load other end
Ground connection, the control terminal are connected with the output terminal of the trigger circuit, and the input terminal of the trigger circuit is believed for input control
Number.
3. load detecting circuit according to claim 2, which is characterized in that the modular converter includes：
Optocoupler unit flows through the current detection signal of the load circuit for sampling, the optocoupler unit output terminal with it is described
Control module connects；
Current limiting unit, for limiting the electric current for flowing through the optocoupler unit, the current limiting unit output terminal and the optocoupler unit
Input terminal connects, and the current limiting unit input terminal is connected to first main terminal.
4. load detecting circuit according to claim 3, which is characterized in that the optocoupler unit includes the first optocoupler and the
One resistance, one end of the first optocoupler primary side are connected with the current limiting unit, the other end connection of the first optocoupler primary side
To second main terminal, one end of first optical coupling secondary edges is connected with external power supply, first optical coupling secondary edges it is another
End is connected respectively with one end of the first resistor and the control module, the other end ground connection of the first resistor.
5. load detecting circuit according to claim 3, which is characterized in that the modular converter further includes：Protection location,
It is connected between the first node between second main terminal and the current limiting unit and the optocoupler unit, is used for
Clamper is carried out to the input voltage of the optocoupler unit.
6. load detecting circuit according to claim 3, which is characterized in that the optocoupler unit includes the second optocoupler, the
Three optocouplers, second resistance and 3rd resistor；
One end of the second optocoupler primary side is connected with the current limiting unit, the other end of the second optocoupler primary side and described the
One end connection of three optical coupling secondary edges, one end of second optical coupling secondary edges are connected to external power supply, second optical coupling secondary edges
The other end is connected respectively with one end of the second resistance and the control module, the other end ground connection of the second resistance, institute
The other end for stating the 3rd optical coupling secondary edges is connected to second main terminal, and one end of the 3rd optocoupler primary side is connected to described
One end of three resistance, the other end of the 3rd resistor are connected to external power supply, the other end connection of the 3rd optocoupler primary side
To the control module.
7. a kind of electronic equipment, which is characterized in that including such as claim 1 to 6 any one of them load detecting circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721274009.7U CN207408504U (en) | 2017-09-28 | 2017-09-28 | A kind of load detecting circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721274009.7U CN207408504U (en) | 2017-09-28 | 2017-09-28 | A kind of load detecting circuit and electronic equipment |
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| CN207408504U true CN207408504U (en) | 2018-05-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110045775A (en) * | 2019-04-18 | 2019-07-23 | 杭州涂鸦信息技术有限公司 | A kind of regulating device |
| CN110086362A (en) * | 2019-05-29 | 2019-08-02 | 杭州涂鸦信息技术有限公司 | A kind of regulating device |
-
2017
- 2017-09-28 CN CN201721274009.7U patent/CN207408504U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110045775A (en) * | 2019-04-18 | 2019-07-23 | 杭州涂鸦信息技术有限公司 | A kind of regulating device |
| CN110045775B (en) * | 2019-04-18 | 2020-06-12 | 杭州涂鸦信息技术有限公司 | Adjusting device |
| CN110086362A (en) * | 2019-05-29 | 2019-08-02 | 杭州涂鸦信息技术有限公司 | A kind of regulating device |
| CN110086362B (en) * | 2019-05-29 | 2020-11-03 | 杭州涂鸦信息技术有限公司 | Adjusting device |
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Address after: 518000 Guangdong science and technology innovation and Research Institute, Shenzhen, Shenzhen, Nanshan District No. 6, science and technology innovation and Research Institute, Shenzhen, D 10, 1004, 10 Patentee after: Shenzhen Hetai intelligent home appliance controller Co.,Ltd. Address before: 518000 Guangdong science and technology innovation and Research Institute, Shenzhen, Shenzhen, Nanshan District No. 6, science and technology innovation and Research Institute, Shenzhen, D 10, 1004, 10 Patentee before: SHENZHEN H&T DATA RESOURCES AND CLOUD TECHNOLOGY Ltd. |
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