CN207301136U - A kind of program-controlled test power device - Google Patents
A kind of program-controlled test power device Download PDFInfo
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- CN207301136U CN207301136U CN201720607354.1U CN201720607354U CN207301136U CN 207301136 U CN207301136 U CN 207301136U CN 201720607354 U CN201720607354 U CN 201720607354U CN 207301136 U CN207301136 U CN 207301136U
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Abstract
The utility model discloses a kind of program-controlled test power device, comprising：Waveform generator, it generates and exports sinusoidal analog signal；Delta modulation wave producer, it generates and exports two-way triangular carrier；The waveform generator is connected with the output terminal of delta modulation wave producer with the input terminal of comparison circuit module；SPWM modulation modules, its input terminal are connected with the output terminal of the comparison circuit module；The high-power IPM switch modules, its input terminal are connected with the output terminal of the SPWM modulation modules；Low-pass filter, its input terminal are connected with the output terminal of the high-power IPM switch modules.The utility model has the advantages that the three phase frequency changing power of automation output FM amplitude modulation.
Description
Technical field
A kind of program-controlled test power device is the utility model is related to, more particularly to a kind of Multifunctional coil kind equipment synthesis ginseng
The program-controlled test power device of number test device.
Background technology
Coil kind equipment (such as all kinds of transformers, mutual inductor) occupies extremely important in the various kinds of equipment of electric system
Status, and its electrical test project is often more and more complicated compared with project for other equipment.Coil class is directed to currently on the market
Each experiment of equipment all needs to configure a set of Special test instrument substantially, and test apparatus is all more heavy.Therefore one is completed to set
Standby experiment generally requires more instruments.The factors such as place and power supply are limited to, need repeatedly to remove instrument in working at the scene
Before remove after and wiring is repeated several times, work efficiency is relatively low.
All the time in mutual inductor and power transformer electrical test, typically carried out using discrete detection device
Test.Experiment power supply generally use power controling box (pressure regulator) is adjusted.Coordinate various voltmeters, ammeter and work(again
The meters such as rate table measure.Power controling box is mainly what is be made of an automatic coupling voltage regulator, it usually needs manual operation tune
Section, experiment process needs are artificial to adjust voltage when observing meter, must record corresponding measurement result.Operating personnel are wanted
Ask comparison high, operating process is also comparatively laborious, is unfavorable for realizing automatic measurement.With the development of electronic technology, numeral has been welcome
The epoch of change, measuring instrument also all have been carried out numeral towards intelligence, digital development, current most measuring instrument
Change, but still generally using automatic coupling voltage regulator as experiment power supply, base in the experiments such as industrial frequency withstand voltage, idling load and C-V characteristic
On this based on manual operations.Joint connection in site power controling box and measurement meter, more time-consuming, automation are needed during experiment
Degree is not high.
Utility model content
The utility model aim is to provide a kind of program-controlled test power device, by using program-controlled electronic voltage regulator
Instead of traditional automatic coupling voltage regulator, realization makes the program-controlled test power device have pressure-adjustable frequency modulation function, output voltage frequency
The purpose of the continuously adjustable sine wave experiment power supply of the good voltage of rate stability.
In order to realize the above object the utility model is achieved through the following technical solutions：
A kind of program-controlled test power device, comprising：Waveform generator, it generates and exports sinusoidal analog signal；Triangle tune
Wave producer processed, it generates and exports two-way triangular carrier；The output terminal of the waveform generator and delta modulation wave producer
It is connected with the input terminal of comparison circuit module；SPWM modulation modules, its input terminal and the output terminal of the comparison circuit module connect
Connect；High-power IPM switch modules, its input terminal are connected with the output terminal of the SPWM modulation modules；Low-pass filter, it is inputted
End is connected with the output terminal of the high-power IPM switch modules.
Preferably, the waveform generator further includes：The pulse that the clock generator of the waveform generator produces
The counter of the waveform generator is driven, the counter exports the address wire of sweep waveform data ROM, and successively by institute
The data for stating sinusoidal variations in ROM export the input terminal of the D/A converter to the waveform generator, the D/A converter
Output terminal exports sinusoidal analog signal.
Preferably, the program-controlled test power device is further provided with digital am circuit：The digital am circuit is set
Some D/A converters receive the sinusoidal analog signal that the waveform generator produces, and set the amplitude modulation number of the D/A converter
According to, the amplitude modulation to the sinusoidal analog signal, and the sinusoidal signal by D/A converter output after amplitude modulated.
Preferably, the program-controlled test power device further includes a rectifier, itself and high-power IPM switch modules
Connection.
Preferably, the SPWM modulation modules are further provided with phase inverter, the first power driver module and the drive of the second power
Dynamic model block；The input terminal of the phase inverter is connected with the output terminal of comparison circuit module, the output terminal of the phase inverter and second
The first end connection of power driver module；The second end of second power driver module is defeated with high-power IPM switch modules
Enter end connection；The first end of first power driver module is connected with the output terminal of comparison circuit module, its second end with it is big
The input terminal connection of power IPM switch modules.
The utility model has the following advantages compared with prior art：
By using digital waveform synthetic technology and high-power SPWM pulse modulation technologies, make the program-controlled experiment power supply dress
Putting has the advantages that the three phase frequency changing power of automation output FM amplitude modulation.Program-controlled electronic voltage regulator is employed to replace passing
The automatic coupling voltage regulator of system, it has pressure-adjustable frequency modulation function, and output voltage frequency stability is good.This programmable power supply uses SPWM tune
Ripple processed, controls the work of high-power IPM switch modules.The SPWM being so controlled by high-performance digital signal processor is modulated
The digital power of Technology design, the continuously adjustable sine wave experiment power supply of exportable voltage, can reduce equipment investment, shorten scene
Test period, improves work efficiency, produces economic benefit.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of the waveform generator of program-controlled test power device of the utility model；
Fig. 2 is the sinusoidal signal digital am that a kind of waveform generator of program-controlled test power device of the utility model is sent
Schematic block circuit diagram；
Fig. 3 is a kind of structure diagram of program-controlled test power device of the utility model；
Fig. 4 is a kind of schematic diagram of program-controlled experiment power supply SPWM modulation principles of the utility model.
Embodiment
Below in conjunction with attached drawing, by describing a preferable specific embodiment in detail, the utility model is done and is further explained
State.
With reference to as shown in Figures 1 to 4, a kind of program-controlled test power device of the utility model, comprising：Waveform generator, three
Angle modulation wave producer, comparison circuit module, SPWM modulation modules, high-power IPM switch modules and low-pass filter.
The waveform generator connects with the output terminal of delta modulation wave producer and the input terminal of the comparison circuit module
Connect, the output terminal of the comparison circuit module is connected with the input terminal of the SPWM modulation modules, the SPWM modulation modules
The input terminal of output terminal and high-power IPM (the Intelligent Power Module intelligent power module) switch module connects
Connect, the output terminal of the high-power IPM switch modules is connected with the input terminal of the low-pass filter；
The delta modulation wave producer is used to generate and export two-way triangular carrier.
As shown in Figure 1, the waveform generator further includes:Clock generator, counter, Wave data ROM module
With D/A converter.
The operation principle of the waveform generator is：The pulse produced by the clock generator of the waveform generator,
Remove to drive the counter of the waveform generator, address wire of the counter output for sweep waveform data ROM, so according to
The secondary data by sinusoidal variations in the ROM export the input terminal of the D/A converter to the waveform generator, are turned by D/A
The output terminal output sinusoidal analog signal of parallel operation.
As shown in Fig. 2, the program-controlled test power device is further provided with digital am circuit, by the waveform generator
The sinusoidal analog signal of generation is input in the D/A converter that modulation circuit is equipped with, and main control computer is by setting the D/A converter
AM data, realize the amplitude modulation to the sinusoidal analog signal, and by the D/A converter export it is amplitude modulated after sine
Signal.
As shown in figure 3, it is described it is amplitude modulated after sinusoidal signal as feedback voltage, the two-way triangular carrier is as sampling
Voltage, by the comparison circuit module, compares control duty cycle by the feedback voltage and sampled voltage ratio and exports steady
Signal is pressed, the SPWM modulation modules receive the voltage regulation signal, and the voltage regulation signal is divided into two-way, wherein directly exporting all the way
The first power driver module being equipped with to the SPWM modulation modules, another way is equipped with anti-phase by the SPWM modulation modules
Device carries out the voltage regulation signal anti-phase and exports the second power driver module being equipped with to the SPWM modulation modules.
The program-controlled test power device is further provided with rectifier and uses modulus-digital to analog conversion, will input 50Hz,
The commercial power rectification of 220V exchanges inputs high-power IPM switching moldings into pure DC voltages of the 300V without high frequency, low-frequency voltage flaw
Block.
As shown in figure 4, SPWM modulation is carried out to the voltage regulation signal by first and second described power driver module：
The voltage regulation signal for inputting first power driver module is further divided into two opposite polarity reference sine wave μgWith-μg,
Voltage regulation signal in second power driver module is two-way triangular carrier μc, the reference sine wave μgWith-μgWith two-way three
Angle carrier wave μcThe power switch drive signal for cutting and producing is handed over to be modulated；The reference sine wave contains 2 fundamental wave μgWith-μg.Institute
State μgFundamental wave and the triangular wave μcHand over to cut and produce μaBe complementary to signal- the μgFundamental wave and μcFundamental wave is handed over to cut and also produced
μbSignal andSignal.Neglect voltage μoPositive half cycle be by μaAnd μbWith logic determine.Work as μa, μbFor high level when, make
Obtain μo=μd；Work as μaOr μbWhen to have one be low level so that μo=0.Since in positive half cycle, μaHigh level compare μ alwaysb's
Low level area is wide so that output voltage μoIn only include μdWith 0 two level.Similarly, in negative half period output voltage μoBy μaWith
Determined with logic, it is only comprising 0 and-μdTwo level.
Pass through power driving circuit, that is, big through the modulated signal of sinusoidal pulse width modulation technology (abbreviation SPWM) by above-mentioned
Power IPM switch modules are handled with low-pass filter, by with the isolating transformer that the program-controlled experiment power supply is connected into
Row output；Can the continuously adjustable sine wave experiment power supply of output voltage.
In conclusion the continuously adjustable sine wave experiment power supply of voltage is the key component of device, it is in Multifunctional coil
Under the control for the master control borad that kind equipment testing synthesis parameter device is equipped with, output can continuous voltage regulating experiment power supply.The power supply is transported
With digital waveform synthetic technology and high-power SPWM pulse modulation technologies, the output of amplitude modulation power supply is realized.
Program-controlled experiment power supply is high power components, for protection test equipment and the safety of test item in use, is designed with
Multi-protective function, such as overcurrent-overvoltage excess temperature defencive function.Defencive function is all devised in hardware and software.
Although the content of the utility model is discussed in detail by above preferred embodiment, but it should be appreciated that on
The description stated is not considered as the limitation to the utility model.After those skilled in the art have read the above, for
A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the scope of protection of the utility model should be by appended
Claim limit.
Claims (5)
1. a kind of program-controlled test power device, it is characterised in that include：
Waveform generator, it generates and exports sinusoidal analog signal；
Delta modulation wave producer, it generates and exports two-way triangular carrier；
The waveform generator is connected with the output terminal of delta modulation wave producer with the input terminal of comparison circuit module；
SPWM modulation modules, its input terminal are connected with the output terminal of the comparison circuit module；
High-power IPM switch modules, its input terminal are connected with the output terminal of the SPWM modulation modules；Low-pass filter, its is defeated
Enter end to be connected with the output terminal of the high-power IPM switch modules.
A kind of 2. program-controlled test power device as claimed in claim 1, it is characterised in that
The waveform generator further includes：
The counter of waveform generator, the counter described in the pulsed drive that the clock generator of the waveform generator produces
The address wire of sweep waveform data ROM is exported, and the data of sinusoidal variations in the ROM is exported to the waveform occur successively
The input terminal of the D/A converter of device, the output terminal output sinusoidal analog signal of the D/A converter.
A kind of 3. program-controlled test power device as claimed in claim 1, it is characterised in that
The program-controlled test power device is further provided with digital am circuit,
The D/A converter that the digital am circuit is equipped with receives the sinusoidal analog signal that the waveform generator produces, and sets
The AM data of the D/A converter, the amplitude modulation to the sinusoidal analog signal, and by D/A converter output through adjusting
Sinusoidal signal after width.
A kind of 4. program-controlled test power device as claimed in claim 1, it is characterised in that
The program-controlled test power device further includes a rectifier, it is connected with high-power IPM switch modules.
A kind of 5. program-controlled test power device as claimed in claim 1, it is characterised in that
The SPWM modulation modules are further provided with phase inverter, the first power driver module and the second power driver module；It is described
The input terminal of phase inverter is connected with the output terminal of comparison circuit module, the output terminal of the phase inverter and the second power driver module
First end connection；The second end of second power driver module is connected with the input terminal of high-power IPM switch modules；
The first end of first power driver module is connected with the output terminal of comparison circuit module, its second end with it is high-power
The input terminal connection of IPM switch modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720607354.1U CN207301136U (en) | 2017-05-27 | 2017-05-27 | A kind of program-controlled test power device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720607354.1U CN207301136U (en) | 2017-05-27 | 2017-05-27 | A kind of program-controlled test power device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207301136U true CN207301136U (en) | 2018-05-01 |
Family
ID=62449699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720607354.1U Active CN207301136U (en) | 2017-05-27 | 2017-05-27 | A kind of program-controlled test power device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207301136U (en) |
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2017
- 2017-05-27 CN CN201720607354.1U patent/CN207301136U/en active Active
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