CN207742566U - Test circuit and test equipment - Google Patents
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- CN207742566U CN207742566U CN201721899935.3U CN201721899935U CN207742566U CN 207742566 U CN207742566 U CN 207742566U CN 201721899935 U CN201721899935 U CN 201721899935U CN 207742566 U CN207742566 U CN 207742566U
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Abstract
The utility model embodiment provides a kind of test circuit and test equipment, wherein the test circuit can be used for the testing engineering of wind driven generator set converter controller.Test circuit includes：Signaling conversion circuit module, the original PWM waveform that inverter controller to be measured can be exported is converted to the first test waveform, and first test waveform is the default amplitude PWM waveform that the analog input port of the inverter controller to be measured can receive；Signal generating circuit module, for generating the second test waveform, second test waveform is the sine wave-shaped signal for the predetermined amplitude that the analog input port of the inverter controller to be measured can receive；Detection circuit module can export DI signals and DO signal detections.The utility model embodiment is capable of providing multi-functional, inexpensive, small portable test circuit and test equipment.
Description
Technical field
The utility model belongs to wind-driven generator technical group field more particularly to a kind of test circuit and test equipment.
Background technology
The main function of generator converter controller, especially wind driven generator set converter controller includes：It utilizes
The analog signals such as voltage signal, current signal and temperature signal in current transformer work, calculation process output control current transformer
The pulse width modulation (PWM) waveform signal that IGBT switch modules are switched on or off, and then by controlling opening for IGBT switch modules
Logical, shutdown working condition, realizes the conversion between exchange and direct current in generator converter.Inverter controller can also lead to
The DI input signals for crossing the working condition being switched on or off for receiving characterization IGBT switch modules, are judging IGBT switch modules
After fault condition, the DO output signals of acquisition are controlled to the startup and stopping of current transformer.
In the prior art, to the test of wind turbine power generation machine inverter controller, test fixture is needed to have energy
The signal generator of the analog signals such as enough analog voltage signal, current signal, temperature signal.Test fixture also needs to have energy
Enough to check, the control current transformer IGBT switch modules exported by inverter controller calculation process open, the pulse that turns off is wide
Spend the oscillograph of modulation (PWM) waveform signal.Above-mentioned oscillograph and signal generator are required to tester and have certain profession
Knowledge frequently is operated, and complicated for operation, and efficiency is low.Also, since the unit price of oscillograph and signal generator is all ten thousand
More than member, maintenance cost is again very high, substantially increases the cost of test job.It adds, can simulate to input as DI and believe
Number IGBT switch modules fault simulation signal and the circuit boards of controller DO output signals can be detected so that entire wind
The test fixture of power generator group inverter controller is complicated and heavy, is not easy to very much be carried and tested.
Invention content
The utility model embodiment provides a kind of multi-functional, inexpensive, small portable test circuit and test is set
It is standby.
In a first aspect, providing a kind of test circuit, it can be used for the test work of wind driven generator set converter controller
Journey, test circuit include：Signaling conversion circuit module, the original PWM waveform that inverter controller to be measured can be exported
The first test waveform is converted to, the first test waveform can receive pre- for the analog input port of inverter controller to be measured
If amplitude PWM waveform；Signal generating circuit module, for generating the second test waveform, the second test waveform is change to be measured
The sine wave-shaped signal for the predetermined amplitude that the analog input port of stream device controller can receive；Detection circuit module, can
Export inverter controller I/O functional test signals to be measured.
According in a first aspect, test circuit further comprises the first signal input node, the first signal output node, second
Signal input node and second signal output node, test circuit are connected to current transformer control to be measured by the first signal input node
Device processed can receive the original PWM waveform of inverter controller output to be measured；First signal output node and unsteady flow to be measured
The analog input port electrical of device controller connects, and default amplitude PWM waveform and/or sine wave-shaped signal are transmitted to
Analog input port；Second signal input node and second signal output node are located at detection circuit module, can with it is to be measured
Inverter controller is electrically connected.
According in a first aspect, test circuit further comprises the first toggle switch, it is electrically connected to signaling conversion circuit module
And signal generating circuit module, signaling conversion circuit module and signal generating circuit module access to by the first toggle switch
One output node；First toggle switch is used for the output signal of the first signal output node detection circuit module in predetermined amplitude
It is switched between PWM waveform and the sine wave-shaped signal of predetermined amplitude.
According in a first aspect, signaling conversion circuit module includes electrical level transferring chip, which includes anode tube
Foot, cathode pin, power pin, ground pin and signal output pin.
According in a first aspect, anode pin is arranged by capacity earth, cathode pin is connected to signal by resistance and inputs
End；Signaling conversion circuit module further comprises that zener diode connects, and one end of zener diode connection is connected to anode tube
Between foot and capacitance, the other end is connected between cathode pin and resistance；Power pin connects DC power supply and passes through capacitance
Ground connection；Ground pin is grounded；Signal output pin is connected to signal output end；Power pin, ground pin and signal efferent duct
Foot is connected by capacitance with resistance.
According in a first aspect, the cathode pin of signaling conversion circuit module also passes through two voltage stabilizings of resistance and differential concatenation
Diode and/or concatenated resistance, light emitting diode ground connection setting；Signaling conversion circuit module is using electrical level transferring chip
The amplitude conversion circuit that P480 is built；Signaling conversion circuit module further includes operational amplification circuit unit, is used for waveform signal
Amplification predetermined ratio is used to waveform signal amplifying predetermined ratio.
According in a first aspect, original PWM waveform is the pwm signal of 0V~+15V；First test waveform is 0V~+5V
Pwm signal；Signal generating circuit module includes operational amplification circuit, for being used for waveform signal amplification predetermined ratio by wave
Shape signal amplifies predetermined ratio.
Signal generating circuit module includes：Analog input port for generating inverter controller to be measured can receive
Predetermined amplitude sine wave-shaped signal RC sine wave oscillation circuits or LC sine wave oscillation circuits；Operational amplification circuit, even
It is connected to the waveform signal output end of RC sine wave oscillation circuits or LC sine wave oscillation circuits, it is predetermined for amplifying waveform signal
Ratio.
According in a first aspect, detection circuit module includes DI signal sending circuit modules, for generating IGBT switch modules
Fault simulation signal；And DO signal deteching circuit modules, the DO letters for receiving and detecting inverter controller output to be measured
Number；DI signal sending circuit modules include the second toggle switch, for simulating IGBT switch module fault simulation signals.
According in a first aspect, DI signal sending circuit modules include：First indicator light, for judging current transformer control to be measured
Whether device DI input signals are IGBT switch module fault simulation signals；DO signal deteching circuit modules, including the second indicator light,
For judging inverter controller DO output signals circuit to be measured fault-free.
According in a first aspect, signaling conversion circuit module, signal generating circuit module, detection circuit module are integrated in one piece
Circuit board.
Second aspect provides a kind of test equipment, can be used for the test work of wind driven generator set converter controller
Journey, test equipment include the test circuit that above-mentioned first aspect provides.
The test circuit and test equipment that the utility model embodiment provides have signaling conversion circuit merely with one
The test circuit of module, signal generating circuit module and detection circuit module, instead of original oscillography needed in testing
Device, signal generator and I/O test circuit plates, realize the test to the multiple functions of inverter controller, can save unsteady flow
The cost of device controller test tooling, the volume for reducing inverter controller test fixture reduce inverter controller test work
The quality of dress, the test complexity for reducing inverter controller test fixture.
Description of the drawings
It, below will be in the utility model embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Required attached drawing is briefly described, it should be apparent that, drawings described below is only the one of the utility model
A little embodiments for those of ordinary skill in the art without creative efforts, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the process schematic of prior art test fixture test inverter controller；
Fig. 2 is a kind of modular structure schematic diagram of the test circuit of embodiment of the utility model；
Fig. 3 is the module diagram of the module of test circuit signaling conversion circuit shown in Fig. 2；
Fig. 4 is the circuit topology figure that test circuit shown in Fig. 2 uses electrical level transferring chip；
Fig. 5 is that test circuit shown in Fig. 2 uses operational amplification circuit unit topological diagram；
Fig. 6 is the circuit topology figure that test circuit shown in Fig. 2 uses signal generating circuit module；
Fig. 7 is the analog signal waveform figure that test circuit shown in Fig. 2 generates；
Fig. 8 is the circuit topology figure that test circuit shown in Fig. 2 uses DI signal sending circuit modules；
Fig. 9 is the circuit topology figure that test circuit shown in Fig. 2 uses DO signal deteching circuit modules；
Figure 10 is test process schematic diagram of the test circuit shown in Fig. 2 to inverter controller to be measured；
Figure 11 is the modular structure schematic diagram of the test circuit of another embodiment of the utility model；
Figure 12 is test process schematic diagram of the test circuit shown in Figure 11 to inverter controller to be measured.
Specific implementation mode
It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained without creative efforts belong to
The range of the utility model protection.
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that this practicality is new
The design of example embodiment more comprehensively and completely, and is comprehensively communicated to those skilled in the art by type.In the figure in order to
Clearly, it may be exaggerated the thickness of region and layer.Identical reference numeral indicates same or similar structure in figure, thus will
Omit their detailed description.
In addition, described feature, structure or characteristic can be incorporated in one or more implementations in any suitable manner
In example.In the following description, many details are provided to fully understand the embodiments of the present invention to provide.So
And it will be appreciated by persons skilled in the art that the technical solution of the utility model can be put into practice without one in specific detail
Or more, or other methods, constituent element, material may be used etc..In other cases, it is not shown in detail or describes known knot
Structure, material or operation to avoid fuzzy the utility model major technique intention.
First by attached drawing, routine test tooling is introduced to inverter controller test process, as shown in Figure 1, existing
Some routine test toolings 50 at least need one for detect inverter controller output PWM waveform oscillograph,
One signal hair that the analog signals such as collected voltage, electric current, temperature signal in current transformer work are imitated for generating
Raw device, and the I/O functional test circuit boards for inverter controller DI input signals to be measured and DO output signals.
Wherein, during testing the circuit of PWM waveform of inverter controller output to be measured, it may be used and show
The PWM waveform that wave device exports inverter controller to be measured is detected, and is when confirmly detecting signal by oscillograph
After PWM waveform, it can be assumed that the circuit of the PWM waveform of inverter controller to be measured output is normal, otherwise, it can sentence
There are failures in the circuit of the PWM waveform of fixed inverter controller output to be measured.In the inspection for testing inverter controller to be measured
During the circuit for surveying analog input, signal generator can be utilized to generate sine wave analog signals, and by generation
Sine wave analog signals are input to the detection analog input port of inverter controller to be measured.Inverter controller to be measured will
The sine wave analog signals received are sent to the computer being in communication with, and are shown by the test software on computer backstage
Above-mentioned sine wave analog signals, in this way, can be by judging that the waveform that test software is shown generates sine with signal generator
Wave simulation amount signal is compared, and then judges whether the circuit of the detection analog input of inverter controller to be measured occurs event
Barrier.
Above-mentioned oscillograph and signal generator are the individual standard test equipment of outsourcing, and unit price is all at ten thousand yuan or more, dimension
It is again very high to protect cost, substantially increases the cost of test job.In addition, oscillograph and signal generator are required to power supply
For relatively high 220V alternating currents, the security risk of test job is virtually increased again.It is defeated as DI along with that can simulate
Enter the IGBT switch modules fault simulation signal of signal and the circuit of inverter controller DO output signals to be measured can be detected
Plate so that the test job of entire generator converter controller needs two complexity bulky standard outsourcing device and one again
Block I/O functional test circuit board could realize that this all brings to staff when carrying test fixture and carrying out test job
Great inconvenience.
To solve the above-mentioned problems, the utility model embodiment provides a kind of for testing inverter controller
Test circuit, as shown in Fig. 2, the utility model embodiment provide test circuit 100 include：Signaling conversion circuit module 101,
The original PWM waveform that inverter controller to be measured can be exported is converted to the first test waveform, first test waveform
The default amplitude PWM waveform that can be received for the analog input port of the inverter controller to be measured；Electricity occurs for signal
Road module 102, for generating the second test waveform, which is the analog input end of inverter controller to be measured
The sine wave-shaped signal for the predetermined amplitude that mouth can receive；Detection circuit module 103 can export DI signals and the inspection of DO signals
It surveys.
The test circuit that the utility model embodiment provides can not only realize a variety of detection work(to inverter controller
Can, and it is portable small, also because eliminating the equipment such as oscillograph and signal generator, therefore testing cost is also reduced, and carry
The safety of high inverter controller test job and efficiency.
Also referring to Fig. 3, signaling conversion circuit module 101 includes electrical level transferring chip 111；And further comprise
Operational amplification circuit unit 112 is electrically connected with electrical level transferring chip 111.Operational amplification circuit unit 112 is used for level conversion
The waveform signal amplification predetermined ratio output that chip 111 exports.
Also referring to Fig. 4, specific electrical level transferring chip 111 include anode pin 1, cathode pin 3, power pin 6,
Ground pin 4 and signal output pin 5, anode pin 1 are arranged by capacity earth, and cathode pin 3 is connected to letter by resistance
Number input terminal Drive_W+；Signaling conversion circuit module further comprises that zener diode connects, the one of zener diode connection
End is connected between anode pin 1 and capacitance, and the other end is connected between cathode pin 3 and resistance；Power pin 6 connects direct current
Power supply and pass through capacity earth；Ground pin 4 is grounded；Signal output pin 5 is connected to signal output end PWM_W+；Power supply
Pin 6, ground pin 4 and signal output pin 5 are connected by capacitance with resistance.Cathode pin 3 also by resistance with it is reversed
Concatenated two zener diodes and/or concatenated resistance, light emitting diode ground connection setting.Electrical level transferring chip 111 is level
Original PWM waveform can be converted to the pwm signal of 0V~+15V by conversion chip P480, including electrical level transferring chip 111；
First test waveform is the pwm signal of 0V~+5V.
Electrical level transferring chip 111 can be used for after receiving the PWM waveform for exporting inverter controller to be measured,
The PWM waveform that inverter controller exports is converted into the first test waveform, so as to pass through inverter controller energy to be measured
The first test waveform is enough tested, the first test waveform can receive pre- for the analog input port of inverter controller to be measured
The PWM waveform of tentering value.
In some instances, PWM waveform can be understood as the impulse waveform of variable duty ratio, and PWM waveform can be used for waiting for
It surveys inverter controller and control is turned on and off to IGBT switch modules.
It is understood that the amplitude of the PWM waveform of inverter controller output to be measured is than the current transformer to be measured
The waveform signal amplitude that the detection analog input port of controller itself can receive wants high, so cannot directly detect, needs
Want signaling conversion circuit module 101 that the PWM waveform that inverter controller to be measured exports is converted to the current transformer control to be measured
The predetermined amplitude PWM waveform that the analog input port of device processed can receive.
Please refer to fig. 5, specifically, there is operational amplification circuit unit 112 signal input port Si1, signal to export
Hold I_W1_anal and ground terminal GND.Operational amplification circuit unit 112 includes operational amplifier, and the end in the same direction of operational amplifier is logical
Resistance eutral grounding setting is crossed, the reverse input end of operational amplifier is connected to signal input port Si1, operational amplifier by resistance
Output end be connected to signal output end I_W1_anal, and also resistance and capacitance are connected in parallel with operational amplifier.
Signal generating circuit module 102 includes that can be connect for generating the analog input port of inverter controller to be measured
The RC sine wave oscillation circuits or LC sine wave oscillation circuits of the sine wave-shaped signal of the predetermined amplitude of receipts.
Also referring to Fig. 6, specific signal generating circuit module 102 can be using 8038 chips of ICL build can
To carry out the oscillating circuit of sine wave-shaped signal output.Signal generating circuit module 102 has signal output port Si1, by upper
It states oscillating circuit and produces the sine wave signal that amplitude is 0.75V, and is via signal output port Si1 that sine wave-shaped signal is defeated
Go out.
In order to improve measuring accuracy, convenient for the test and comparison to wave signal, signal generating circuit module 102 can also be into
One step includes operational amplification circuit unit, is connected to the signal output port Si1 of above-mentioned signal generating circuit module 102, is used for
The waveform signal is amplified into predetermined ratio.Wherein operational amplification circuit as shown in Figure 5 may be used in operational amplification circuit unit
Unit.The waveform that operational amplification circuit unit exports signal generating circuit module is further processed, and can be by amplitude
The sine wave signal of 0.75V is enlarged into the sine wave signal that amplitude is 1.5V, and is exported via the ports 1_W1_anal.The 1.5V
Sine wave signal it is as shown in Figure 7.
Detection circuit module 103 for realizing DI input signals and DO output signals to inverter controller to be measured inspection
The detection on survey time road.
In some optional embodiments, detection circuit module 103 includes DI signal sending circuit modules, for generating IGBT
Switch module fault simulation signal；And DO signal deteching circuit modules, it is defeated for receiving and detecting inverter controller to be measured
The DO signals gone out；DI signal sending circuit modules include the second toggle switch, for simulating IGBT switch module fault simulations letter
Number.
For the ease of being examined to the DI input signals of inverter controller to be measured and the measure loop of DO output signals
When survey, testing result is clearly got, in some instances, DI signal sending circuit modules further include：First indicator light is used
In judging whether inverter controller DI input signals to be measured are IGBT switch module fault simulation signals；DO signal deteching circuits
Module further includes the second indicator light, for judging inverter controller DO output signals circuit to be measured fault-free.
DO signal deteching circuit modules can be used for receiving and detect third test signal, which is to be measured
The DO output letters of inverter controller inverter controller to be measured output after receiving IGBT switch module fault simulation signals
Number.
For example, in DI signal deteching circuit modules, it is high level that IGBT switch module fault simulation signals, which can be arranged,
Signal, and when the DI input signals circuit of inverter controller to be measured generates above-mentioned fault-signal, the first indicator light is point
Bright state.And in the signal condition that the computer daemon software that used can be communicated with inverter controller to be measured is shown,
The fault condition in the DI input signals circuit of inverter controller to be measured is determined, for example, working as DI signal deteching circuit moulds confirming
After block produces high level fault signal, letter that the computer background test software that is communicated with inverter controller to be measured is shown
Number state is also high level, DI input signals circuit fault-free can be thought, conversely, can then determine above-mentioned DI input signals
Loop fault.
Also it is in the signal condition that the determining computer background test software communicated with inverter controller to be measured is shown
After high level, inverter controller to be measured can be judged by judging the DO output signals that DO signal deteching circuit modules obtain
DO output signals circuit whether break down.Similarly, if detecting, DO output signals are to be carried out with inverter controller to be measured
The identical high level of signal condition that the computer background test software of communication is shown, it may be determined that the DO of inverter controller to be measured
Output signal circuit fault-free, conversely, can then determine above-mentioned DO output signals loop fault.
In some instances, as shown in figure 8, Fig. 8 is the circuit topology figure of DI signal sending circuit modules, DI signals are sent
Circuit module can have the second toggle switch S7 controls, can set fault-signal as high level signal, when S7 connects+15 level
Afterwards, the first indicator light LED2 is connected and is lighted, and instruction DI input signals are fault-signal high level signal.
In some instances, as shown in figure 9, Fig. 9 is the circuit topology figure of DO signal deteching circuit modules, DO signal detections
The second indicator light LED3 in circuit module is connected and is lighted, it may be determined that the unsteady flow to be measured that DO signal deteching circuit modules obtain
Device controller DO output signals are also high level, when inverter controller DO output signals to be measured and current transformer to be measured can be confirmed
When the signal condition that the computer background test software communicated is shown is identical, it may be determined that inverter controller DO outputs to be measured
Signal circuit fault-free.
It is understood that signaling conversion circuit module 101, signal generating circuit module 102 and detection circuit module 103
It is integrated in one piece of circuit board respectively；Alternatively, signaling conversion circuit module 101, signal generating circuit module 102 and detection circuit mould
Block 103 is integrated in one piece of circuit board and tests inverter controller to be measured jointly.
Using above-mentioned test circuit so that the cost of test fixture by original 20,000 yuan or more, drop to 2000 yuan hereinafter,
Cost-effective 90% or more.Also, easy to carry, weight drops to 2Kg hereinafter, with a 10cm* by original 10Kg or more
The suitcase of 20cm*30cm can load circuit board and all test circuit components of cable.
Pass through signaling conversion circuit mould when carrying out actual test using above-mentioned test circuit 100 also referring to Figure 10
The amplitude for the PWM waveform that inverter controller to be measured exports is converted to the analog quantity of inverter controller to be measured by block 101
The predetermined amplitude PWM waveform that input port can receive, and predetermined amplitude PWM waveform is input to current transformer to be measured
The analog input port of controller, the PWM waveform received is sent to by inverter controller to be measured leads to it
The computer of letter, and above-mentioned PWM waveform is shown by the test software on computer backstage, in this way, can be by judging that test is soft
The waveform that part is shown generates PWM waveform with signal generator and is compared, and then judges to test inverter controller to be measured
Whether break down in the circuit of the PWM waveform of output；In addition, also sine will be generated using signal generating circuit module 102
Wave simulation amount signal is tested, test process is same as above by the analog input port of inverter controller to be measured.
Using detection circuit module 103 the DI input signals and DO output signals for testing inverter controller to be measured inspection
It, can be by comparing when DI input signals are fault-signal during survey time road, whether DO output signals can judge DI
Input signal is fault-signal, and then judges the detection of the DI input signals and DO output signals of inverter controller 102 to be measured
Whether break down in circuit.
1 is please referred to Fig.1, another embodiment of the utility model provides a kind of test circuit 200, the test circuit 200 and survey
Try circuit 100 it is essentially identical, the difference is that, further comprise the first toggle switch 205, the first signal input node 206,
Second signal input node 207, the first signal output node 208 and second signal output node 209, test circuit 200 pass through
First signal input node 206 is connected to inverter controller to be measured, can receive the original of inverter controller output to be measured
PWM waveform；First signal output node 208 is connect with the analog input port electrical of inverter controller to be measured, will
Default amplitude PWM waveform and/or sine wave-shaped signal are transmitted to analog input port；Second signal input node 207
And second signal output node 209 is located at detection circuit module 203, can be electrically connected with inverter controller to be measured.
Specifically, the first toggle switch 205 can occur with the output end of signaling conversion circuit module 201 and signal respectively
The output end of circuit module 202 is connected.
2 are please referred to Fig.1, when carrying out actual test using above-mentioned test circuit 200, the first toggle switch can be used
205 test circuit 200 output signal between predetermined amplitude PWM waveform and the sine wave-shaped signal of predetermined amplitude into
Row switching.Complete the fault condition in detection the analog input circuit and PWM waveform circuit of inverter controller to be measured.
In some instances, in order to ensure test accuracy, it is predetermined can the first toggle switch 205 to be first adjusted to reception
The sine wave-shaped signal of amplitude tests the detection analog input circuit of inverter controller to be measured, to be measured determining
When the detection analog input circuit fault-free of inverter controller, then the first toggle switch 205 is adjusted to and receives pre- tentering
It is worth PWM waveform, to ensure the test accuracy in the PWM waveform circuit subsequently exported to inverter controller to be measured.
When being tested inverter controller to be measured using above-mentioned test circuit 200, professional knowledge is not needed, need to only be dialled
Test can be completed by moving corresponding first toggle switch 205, and the time that single inverter controller to be measured is tested is by original
5 minutes or more, drop to 2 minutes hereinafter, efficiency improve 50% or more.
The utility model embodiment additionally provides a kind of test equipment, can be used for the current transformer control to wind power generating set
Device processed is tested, the test equipment include test circuit 100 in above-mentioned first aspect in any possible realization method,
200。
Therefore, the test equipment that the utility model embodiment provides, merely with a simple test circuit and to be measured
The existing analog input port of inverter controller and display equipment, instead of original test for inverter controller
The oscillograph being separately provided, signal generator and block I/O functional test circuit board for being needed in engineering etc., realize to current transformer
The test of controller can save the cost of inverter controller test fixture, reduce the body of inverter controller test fixture
Product, reduces the test complexity of inverter controller test fixture and carries the quality of reduction inverter controller test fixture
The safety of high inverter controller test job and efficiency.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model is not limited to specific configuration described above and shown in figure and processing.Also, for letter
For the sake of bright, the detailed description to known method technology is omitted here.In the above-described embodiments, it has been described and illustrated several specific
Step is as example.But the procedure of the utility model is not limited to described and illustrated specific steps, this field
Technical staff can be variously modified after the spirit for understanding the utility model, modification and addition, or between changing the step
Sequence.
More than, only specific embodiment of the present utility model, but protection scope of the utility model is not limited thereto,
Any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in various equivalent
Modifications or substitutions, these modifications or substitutions should be covered within the scope of the utility model.Therefore, the utility model
Protection domain should be subject to the protection scope in claims.
Claims (12)
1. a kind of test circuit is used for the testing engineering of wind driven generator set converter controller, which is characterized in that the test
Circuit includes：
Signaling conversion circuit module, the original PWM waveform that can export inverter controller to be measured are converted to the first survey
Waveform is tried, first test waveform is the default width that the analog input port of the inverter controller to be measured can receive
It is worth PWM waveform；
Signal generating circuit module, for generating the second test waveform, second test waveform is the current transformer control to be measured
The sine wave-shaped signal for the predetermined amplitude that the analog input port of device processed can receive；
Detection circuit module can export the inverter controller I/O functional test signals to be measured.
2. test circuit according to claim 1, which is characterized in that further comprise the first signal input node, first
Signal output node, second signal input node and second signal output node；
The test circuit is connected to inverter controller to be measured by first signal input node, can receive described wait for
Survey the original PWM waveform of inverter controller output；
First signal output node is connect with the analog input port electrical of the inverter controller to be measured, will be described
Default amplitude PWM waveform and/or sine wave-shaped signal are transmitted to the analog input port；
The second signal input node and the second signal output node are located at the detection circuit module, can with it is described
Inverter controller electrical connection to be measured.
3. test circuit according to claim 2, which is characterized in that further comprise the first toggle switch, be electrically connected to
The signaling conversion circuit module and the signal generating circuit module, the signaling conversion circuit module and the signal occur
Circuit module accesses to first signal output node by first toggle switch；
First toggle switch is used for by the first signal output node output signal, in the predetermined amplitude PWM waveform
It is switched between signal and the sine wave-shaped signal of the predetermined amplitude.
4. test circuit according to claim 1, which is characterized in that the signaling conversion circuit module includes level conversion
Chip, the flat conversion chip include anode pin, cathode pin, power pin, ground pin and signal output pin.
5. test circuit according to claim 4, which is characterized in that the anode pin is arranged by capacity earth, institute
It states cathode pin and signal input part is connected to by resistance；
The signaling conversion circuit module further comprises that zener diode connects, one end connection of the zener diode connection
Between the anode pin and the capacitance, the other end is connected between the cathode pin and the resistance；
The power pin connects DC power supply and passes through capacity earth；
The ground pin ground connection；
The signal output pin is connected to signal output end；
The power pin, the ground pin are connected by capacitance with resistance with the signal output pin.
6. test circuit according to claim 5, which is characterized in that the cathode tube of the signaling conversion circuit module
Foot also passes through two zener diodes and/or concatenated resistance of the resistance and differential concatenation, light emitting diode ground connection setting；
The signaling conversion circuit module is the amplitude conversion circuit built using electrical level transferring chip P480.
7. test circuit according to claim 1, which is characterized in that the original PWM waveform is 0V~+15V's
Pwm signal；First test waveform is the pwm signal of 0V~+5V；
The signaling conversion circuit module further includes operational amplification circuit unit, for the waveform signal to be amplified predetermined ratio
Example.
8. test circuit according to claim 1, which is characterized in that the signal generating circuit module includes：
The sinusoidal waveform for the predetermined amplitude that analog input port for generating the inverter controller to be measured can receive
The RC sine wave oscillation circuits or LC sine wave oscillation circuits of signal；
Operational amplification circuit, the waveform signal for being connected to the RC sine wave oscillation circuits or the LC sine wave oscillation circuits are defeated
Outlet, for the waveform signal to be amplified predetermined ratio.
9. test circuit according to claim 1, which is characterized in that the detection circuit module includes：
DI signal sending circuit modules, for generating IGBT switch module fault simulation signals；And
DO signal deteching circuit modules, the DO signals for receiving and detecting the inverter controller output to be measured；
DI signal sending circuit modules include the second toggle switch, for simulating IGBT switch module fault simulation signals.
10. test circuit according to claim 9, which is characterized in that the DI signal sending circuits module further includes：The
One indicator light, for judging whether the inverter controller DI input signals to be measured are IGBT switch module fault simulations letter
Number；
The DO signal deteching circuits module, including the second indicator light, for judging the inverter controller DO outputs to be measured
Signal circuit fault-free.
11. test circuit according to claim 1, which is characterized in that the signaling conversion circuit module, signal hair
Raw circuit module, the detection circuit module are integrated in one piece of circuit board.
12. a kind of test equipment, which is characterized in that be used for the testing engineering of wind driven generator set converter controller, the survey
Examination equipment includes the test circuit as described in claim 1 to 11 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721899935.3U CN207742566U (en) | 2017-12-29 | 2017-12-29 | Test circuit and test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721899935.3U CN207742566U (en) | 2017-12-29 | 2017-12-29 | Test circuit and test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207742566U true CN207742566U (en) | 2018-08-17 |
Family
ID=63120942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721899935.3U Active CN207742566U (en) | 2017-12-29 | 2017-12-29 | Test circuit and test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207742566U (en) |
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2017
- 2017-12-29 CN CN201721899935.3U patent/CN207742566U/en active Active
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