CN206099924U - Sawtooth wave produces circuit - Google Patents
Sawtooth wave produces circuit Download PDFInfo
- Publication number
- CN206099924U CN206099924U CN201621124034.2U CN201621124034U CN206099924U CN 206099924 U CN206099924 U CN 206099924U CN 201621124034 U CN201621124034 U CN 201621124034U CN 206099924 U CN206099924 U CN 206099924U
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- circuit
- resistance
- sawtooth wave
- wave generating
- sawtooth
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Abstract
The utility model relates to a power control field, especially a sawtooth wave produces circuit. Including sample current treatment circuit, supplementary sawtooth wave produces circuit, main sawtooth wave produces circuit and the 2nd comparison circuit, the utility model provides an in being arranged in power assay appearance power module's sawtooth wave produces circuit, the adoption will be gathered from the supplementary sawtooth wave stack back that the sample current on power module transformer and two former limits connecing, the sawtooth wave that main sawtooth wave produces circuit produced, supplementary sawtooth -wave circuit produced, and error voltage through a comparator and feedback carries out producing after the comparison sawtooth wave of appointed random waveform, adopting this kind of mode to realize the sawtooth wave and guaranteeing in the whole PWM duty cycle cycle, the wave form of sawtooth wave is all at upward trend and unsaturated.
Description
Technical field
The utility model is related to power supply field, particularly a kind of sawtooth wave generating circuit.
Background technology
Generally, when the test related to dc source is carried out, engineer must collect and configure multiple stage instrument, could be complete
Into direct current supply and measurement task.When these complex tasks are performed, multiple stage tester may be simultaneously connected to, so as to increase
The risk of error；For this purpose, engineer may select the automatic test complicated more than manual test, although automatic test task
Manual errors can be reduced, but the research and development engineer write with debugging routine to having worked overloadingly further increases work
Amount.And the appearance of dc source analyzer avoids engineer and uses the debugging that complexity is carried out before multiple devices and test.Electricity
The electric current that source analyzer passes through the measurable inflow DUT of its built-in electric current kinetic measurement ability, without such as current probe
With this kind of sensor of current divider；, without the need for exploitation control and process of measurement, institute is functional and measures all integrated for dc source analyzer
In same equipment, without PC, driver and software, equivalent to the workload related to setting more than 90% is reduced；
Direct current supply and measurement test assignment that user then just can be completed using independent test equipment with 2 day time, using direct current
Source analyzer just be able to can be completed in 5 minutes.And it is usual, universal meter module, oscillograph mould are integrated with dc source analyzer
There is module, data recordin module and multiple DC power suppliers in block, random waveform, wherein, it is each that each power module is produced
It is to be produced to specify the sawtooth waveforms PWM control pulses of waveform to be controlled power conversion module product by control module to plant random waveform
Raw, whether the performance that the stability direct relation of the sawtooth wave generating circuit whole dc source analyzer is reliable and stable.
Utility model content
Goal of the invention of the present utility model is to stability for the sawtooth wave generating circuit in dc source analyzer
Demand, there is provided a kind of working stability, it is adaptable to the sawtooth wave generating circuit of particular power module in power analysis instrument.
To achieve these goals, the technical solution adopted in the utility model is：
A kind of sawtooth wave generating circuit, including sample rate current process circuit, auxiliary sawtooth wave generating circuit, main sawtooth waveforms product
Raw circuit and the second comparison circuit；
The sample rate current process circuit includes two inputs, and described two inputs are received from respectively power conversion electricity
The sample rate current of two, transformer former limit collection in parallel in road, and be processed into being exported after the first signal；
The auxiliary sawtooth-wave circuit receives the first control wave P_RAMP sent from controller, and is located
Manage to export after secondary signal；
The main sawtooth-wave circuit receives the second control wave AUX_RAMP sent from controller, and is located
Manage to export after the 3rd signal.
First signal, secondary signal and the 3rd Signal averaging be the 4th signal, the 4th signal transmission to second
Comparison circuit positive terminal；The end of oppisite phase of second comparison circuit receives an error voltage signal, and exports sawtooth waveforms.
Further, sample rate current process circuit includes full bridge rectifier, resistance sampling circuit, the filtering being sequentially connected
Circuit and the first build-out resistor；The two ends of the resistance sampling circuit connect respectively two outputs of the full bridge rectifier
End.
Further, the filter circuit is LC filter circuits
Further, the auxiliary sawtooth wave generating circuit includes the first negative circuit, the first discharge and recharge being sequentially connected
Circuit and the second build-out resistor.
Further, the first charge-discharge circuit includes first resistor, second resistance and the first electric capacity；The second resistance
One end is connected with the output end of first negative circuit, the other end of the second resistance and the first resistor, first electric
One end connection of appearance；The other end of the first resistor is connected with power supply；The other end ground connection of first electric capacity.
Further, the main sawtooth wave generating circuit includes the second negative circuit, the second discharge and recharge electricity being sequentially connected
Road, comparison circuit and the 3rd build-out resistor.
Further, the second charge-discharge circuit includes 3rd resistor, the 4th resistance and the second electric capacity；The 3rd resistor
One end is connected with the output end of second negative circuit, the other end of the 3rd resistor and the 4th resistance, second electric
One end connection of appearance；The other end of the 4th resistance is connected with power supply；The other end ground connection of second electric capacity.
Further, the comparison circuit includes the 5th resistance, the 6th resistance, the 7th resistance and comparator；Described 5th
One end of resistance is connected with the normal phase input end of comparator, and the other end is connected with the output end of the comparator；The comparator
Inverting input be connected with described second capacity earth one end by the 6th resistance；The inverting input of the comparator also leads to
Cross the 7th resistance to be connected with the output end of comparator；The normal phase input end of the comparator also with the 3rd resistor, the 4th electric
One end connection of resistance connection.
In sum, as a result of above-mentioned technical proposal, the beneficial effects of the utility model are：
In the sawtooth wave generating circuit for power module in power analysis instrument that the utility model is provided, employing will be gathered
From power module transformer and the sample rate current of two former limits connecing, main the sawtooth wave generating circuit sawtooth waveforms, the auxiliary saw that produce
After the auxiliary sawtooth waveforms superposition that tooth wave circuit is produced, produce after being compared with the error voltage of feedback by a comparator and specify
Random waveform sawtooth waveforms；Adopt and realize in this way sawtooth waveforms and ensure that within the whole PWM duty cycle cycle, sawtooth waveforms
Waveform be in ascendant trend and unsaturated.
Description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is sample rate current process circuit circuit diagram in the utility model.
Fig. 3 is that sawtooth wave generating circuit and main sawtooth wave generating circuit circuit diagram are aided in the utility model.
Fig. 4 is comparison circuit circuit diagram in the utility model.
Specific embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only to explain this
Utility model, is not used to limit the utility model.
Embodiment 1：As shown in Figure 1, Figure 2, Figure 3, Figure 4, the present embodiment provides a kind of sawtooth wave generating circuit, including sampling
Current processing circuits 1, auxiliary sawtooth wave generating circuit 2, the comparison circuit 4 of main sawtooth wave generating circuit 3 and second；
The sample rate current process circuit 1 includes two inputs, and described two inputs are received from respectively power conversion
The sample rate current gathered at the former limit of two parallel connections of transformer in circuit, and be processed into being exported after the first signal SIG1；
The auxiliary sawtooth-wave circuit receives the first control wave P_RAMP sent from controller, and is located
Manage to export after secondary signal SIG2；
The main sawtooth-wave circuit receives the second control wave AUX_RAMP sent from controller, and is located
Manage to export after the 3rd signal SIG3.
The first signal SIG1, secondary signal SIG2 and the 3rd signal SIG3 are superposed to the 4th signal SIG4, and described
Four signal SIG4 are transmitted to the positive terminal of the second comparison circuit 4；The end of oppisite phase of second comparison circuit 4 receives error voltage letter
Number, and export sawtooth waveforms.
Sample rate current process circuit 1 includes full bridge rectifier 11, the resistance sampling circuit 12, filter circuit being sequentially connected
13 and first build-out resistor R2；The two ends of the resistance sampling circuit 12 connect the full bridge rectifier 11 respectively two are defeated
Go out end.As shown in Fig. 2 in specific embodiment, the resistance sampling circuit 12 is resistance R1.
The filter circuit 13 is LC filter circuits；L1 and C1 as shown in Figure 2 is LC filter circuits.
The auxiliary sawtooth wave generating circuit 2 includes the first negative circuit 21, the first charge-discharge circuit 22 being sequentially connected
And second build-out resistor R3.
First charge-discharge circuit 22 includes first resistor R4, second resistance R5 and the first electric capacity C2；Second resistance R5
One end be connected with the output end of first negative circuit 21, the other end of second resistance R5 and the first resistor
One end connection of R4, the first electric capacity C2；The other end of first resistor R4 is connected with power supply VCC；The first electric capacity C2's
The other end is grounded.
The main sawtooth wave generating circuit 3 includes the second negative circuit 31, the second charge-discharge circuit 32, the ratio being sequentially connected
Compared with build-out resistor R11 of circuit 33 and the 3rd.
Second charge-discharge circuit 32 includes 3rd resistor R6, the 4th resistance R7 and the second electric capacity C6；3rd resistor R6
One end be connected with the output end of second negative circuit 31, the other end of 3rd resistor R6 and the 4th resistance
One end connection of R7, the second electric capacity C6；The other end of the 4th resistance R7 is connected with power supply VCC；The second electric capacity C6's
The other end is grounded.
The comparison circuit 33 includes the 5th resistance R8, the 6th resistance R9, the 7th resistance R10 and comparator U1；Described
One end of five resistance R8 is connected with the normal phase input end of comparator, and the other end is connected with the output end of the comparator U1；It is described
The inverting input of comparator is grounded one end and is connected by the 6th resistance R9 with the second electric capacity C6；The comparator U1's is anti-
Phase input is also connected by the 7th resistance R10 with the output end of comparator U1；The normal phase input end of the comparator U1 also with
3rd resistor R6, one end connection of the 4th resistance R7 connections.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (8)
1. a kind of sawtooth wave generating circuit, it is characterised in that including sample rate current process circuit, auxiliary sawtooth wave generating circuit,
Main sawtooth wave generating circuit and the second comparison circuit；
The sample rate current process circuit includes two inputs, and described two inputs are received from respectively in circuit for power conversion
The sample rate current of two, transformer former limit collection in parallel, and be processed into being exported after the first signal；
The auxiliary sawtooth-wave circuit receives the first control wave P_RAMP sent from controller, and is processed into
Export after secondary signal；
The main sawtooth-wave circuit receives the second control wave AUX_RAMP sent from controller, and is processed into
Export after 3rd signal
First signal, secondary signal and the 3rd Signal averaging are the 4th signal, and the 4th signal transmission compares to second
Circuit positive terminal；The end of oppisite phase of second comparison circuit receives an error voltage signal, and exports sawtooth waveforms.
2. sawtooth wave generating circuit according to claim 1, it is characterised in that sample rate current process circuit includes connecting successively
Full bridge rectifier, resistance sampling circuit, filter circuit and the first build-out resistor for connecing；The two ends of the resistance sampling circuit point
Do not connect two output ends of the full bridge rectifier.
3. sawtooth wave generating circuit according to claim 2, it is characterised in that the filter circuit is LC filter circuits.
4. sawtooth wave generating circuit according to claim 1, it is characterised in that the auxiliary sawtooth wave generating circuit includes
The first negative circuit, the first charge-discharge circuit and the second build-out resistor being sequentially connected.
5. sawtooth wave generating circuit according to claim 4, it is characterised in that the first charge-discharge circuit includes that first is electric
Resistance, second resistance and the first electric capacity；One end of the second resistance is connected with the output end of first negative circuit, and described
The other end of two resistance is connected with one end of the first resistor, the first electric capacity；The other end of the first resistor connects with power supply
Connect；The other end ground connection of first electric capacity.
6. sawtooth wave generating circuit according to claim 1, it is characterised in that the main sawtooth wave generating circuit include according to
Second negative circuit of secondary connection, the second charge-discharge circuit, comparison circuit and the 3rd build-out resistor.
7. sawtooth wave generating circuit according to claim 6, it is characterised in that the second charge-discharge circuit includes that the 3rd is electric
Resistance, the 4th resistance and the second electric capacity；One end of the 3rd resistor is connected with the output end of second negative circuit, and described
The other end of three resistance is connected with one end of the 4th resistance, the second electric capacity；The other end of the 4th resistance connects with power supply
Connect；The other end ground connection of second electric capacity.
8. sawtooth wave generating circuit according to claim 7, it is characterised in that the comparison circuit include the 5th resistance,
6th resistance, the 7th resistance and comparator；One end of 5th resistance is connected with the normal phase input end of comparator, the other end with
The output end connection of the comparator；The inverting input of the comparator is by the 6th resistance and second capacity earth one
End connection；The inverting input of the comparator is also connected by the 7th resistance with the output end of comparator；The comparator
One end connection that normal phase input end is also connected with the 3rd resistor, the 4th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621124034.2U CN206099924U (en) | 2016-10-14 | 2016-10-14 | Sawtooth wave produces circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621124034.2U CN206099924U (en) | 2016-10-14 | 2016-10-14 | Sawtooth wave produces circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206099924U true CN206099924U (en) | 2017-04-12 |
Family
ID=58483253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621124034.2U Withdrawn - After Issue CN206099924U (en) | 2016-10-14 | 2016-10-14 | Sawtooth wave produces circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206099924U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452392A (en) * | 2016-10-14 | 2017-02-22 | 成都前锋电子仪器有限责任公司 | Sawtooth wave generating circuit |
-
2016
- 2016-10-14 CN CN201621124034.2U patent/CN206099924U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106452392A (en) * | 2016-10-14 | 2017-02-22 | 成都前锋电子仪器有限责任公司 | Sawtooth wave generating circuit |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170412 Effective date of abandoning: 20230707 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170412 Effective date of abandoning: 20230707 |