CN206948208U - A kind of adjustable nonlinear load analogue means - Google Patents
A kind of adjustable nonlinear load analogue means Download PDFInfo
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- CN206948208U CN206948208U CN201720975711.XU CN201720975711U CN206948208U CN 206948208 U CN206948208 U CN 206948208U CN 201720975711 U CN201720975711 U CN 201720975711U CN 206948208 U CN206948208 U CN 206948208U
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- state relay
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Abstract
The utility model discloses a kind of adjustable nonlinear load analogue means, including rectifier bridge, capacitance-resistance pairing cluster, diode cluster, DC solid-state relay cluster, insulated gate bipolar transistor and trigger control unit；The rectifier bridge carries out full-wave rectification to the alternating current for being tested inverter output, is changed into Rectified alternating current；The diode cluster, capacitance-resistance pairing cluster, DC solid-state relay cluster are sequentially connected to the output end of rectifier bridge；The insulated gate bipolar transistor is connected to the point lower end in parallel of DC solid-state relay cluster, and cluster is matched to capacitance-resistance and carries out break-make control with the Rectified alternating current after rectification；The trigger control unit is connected between the output end of rectifier bridge, for controlling turning on and off for insulated gate bipolar transistor.The utility model can adjust current peak factor by the regulation to trigger control unit；By matching the control of cluster to capacitance-resistance, bearing power can be adjusted.
Description
Technical field
It the utility model is related to inverter field, and in particular to a kind of adjustable nonlinear load analogue means.
Background technology
Inverter is that direct current energy is converted into AC energy (mainly industrial frequency AC electric energy) by current transformer, with full
The power demand that the conventional electrical equipment of foot (such as field, has a power failure) under specific condition.
With the development of science and technology, electronic apparatus application is more and more extensive.Therefore, inverter is under many application scenarios
For power electronic equipment.It is however, electronic equipment generally includes current rectifying and wave filtering circuit, the characteristics of this circuit：Electric current and voltage
Not linear corresponding relation, only when supply voltage instantaneous value exceedes filtering capacitance terminal voltage, electric current generation is just had, and
Current value and filter capacitor capacity, power end instantaneous voltage are relevant with capacitance terminal voltage difference, line impedance.This electric current is presented
Strong pulse characteristicses, peak value is much higher than the linear load electric current of same power, therefore this load is referred to as nonlinear load.
Electrically, the ratio between the peak value of periodic current and virtual value are referred to as peak factor, generally represented with CF.
The peak point current of nonlinear load is greatly to test to the current-carrying electrons device of inverter.Computer load
The CF values of input current typically require that inverter can provide the fan-out capability that CF values are 3 up to 2.4~2.6.If can
By the higher occasion of property requirement, the requirement to the electric current CF value ability to bears of inverter is higher.
Inverter is examined to the bearing capacity of current peak factor, is the work that must be completed during inverter is manufactured.
Therefore, it is necessary to inverter be accessed into nonlinear load, to test the bearing capacity of inverter.Existing nonlinear load is according to RCD
Breadboardin, by adjusting resistance and capacitance, to adjust bearing power and current peak factor.
However, the nonlinear load analogue means that RCD circuits are formed, has the following disadvantages：
1st, the adjustment effect of resistance and capacitance intercouples, and makes bearing power and current peak factor not by pre-
Phase rule changes, and regulation difficulty is big.
2nd, RCD circuits form nonlinear load analogue means, when CF is close to 2.8, no matter increase resistor power or
Increase capacitance, it is difficult to which CF is up adjusted again.And this is for increasingly strict reliability evaluation, it is clear that be inadequate.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of adjustable nonlinear load analogue means, solves existing
In inverter loading test, using the problem of regulation is difficult, current peak factor amplitude is limited during traditional RCD breadboardins.
The purpose of this utility model realizes that a kind of adjustable nonlinear load simulation fills by such technical scheme
Put, including rectifier bridge, capacitance-resistance pairing cluster, diode cluster, DC solid-state relay cluster, insulated gate bipolar transistor and triggering control
Unit processed；
The rectifier bridge carries out full-wave rectification to the alternating current for being tested inverter output, is changed into Rectified alternating current；
The diode cluster, capacitance-resistance pairing cluster, DC solid-state relay cluster are sequentially connected to the output end of rectifier bridge；
The insulated gate bipolar transistor is connected to the point lower end in parallel of DC solid-state relay cluster, and cluster is matched to capacitance-resistance
Break-make control is carried out with the Rectified alternating current after rectification；
The trigger control unit is connected between the output end of rectifier bridge, for controlling insulated gate bipolar transistor
Turn on and off.
Further, the diode cluster includes several diodes in parallel；The capacitance-resistance pairing cluster includes quantity and two
Pole pipe identical capacitance-resistance pairing unit；The DC solid-state relay cluster includes quantity and diode identical DC solid relay
Device；Each diode pair answers a capacitance-resistance pairing unit, the corresponding DC solid-state relay of each capacitance-resistance pairing unit；Each
The positive pole of diode and the output end of rectifier bridge are connected, and negative pole is connected with the input of capacitance-resistance pairing unit, capacitance-resistance pairing unit
Output end and the positive pole of DC solid-state relay connect, the negative pole of DC solid-state relay and insulated gate bipolar transistor
Colelctor electrode connects.
Further, the capacitance-resistance pairing unit includes electric capacity and resistance, the electric capacity connection in parallel with a resistor.
Further, the trigger control unit includes isolating transformer, zero passage detection module, light every, Voltage stabilizing module and list
Piece machine；The tested inverter output end of isolating transformer connection；The output end of the isolating transformer and zero passage detection module
Input connection, the zero passage detection module is connected by light every with single-chip microcomputer input；The Voltage stabilizing module is single-chip microcomputer
Power supply；The control pole G ends of the single-chip microcomputer output connection insulated gate bipolar transistor.
By adopting the above-described technical solution, the utility model has the following advantages：
The utility model can adjust current peak factor by the regulation to trigger control unit；By matching somebody with somebody to capacitance-resistance
Control to cluster, bearing power can be adjusted.Therefore, this load simulating device realizes current peak factor and bearing power two
The regulation of individual dimension, and it is small to intercouple, and regulating effect is expectable, and the amplitude of accommodation is higher than conventional art.
Brief description of the drawings
In order that the purpose of this utility model, technical scheme and advantage are clearer, below in conjunction with accompanying drawing to this practicality
It is new to be described in further detail, wherein：
Fig. 1 is schematic diagram of the present utility model；
Fig. 2 is the schematic diagram of trigger control unit.
Embodiment
Below with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail；It is it should be appreciated that it is preferred that real
Example is applied only for illustrating the utility model, rather than in order to limit the scope of protection of the utility model.
A kind of adjustable nonlinear load analogue means, including rectifier bridge, capacitance-resistance pairing cluster, diode cluster, DC solid
Relay, insulated gate bipolar transistor (IGBT) and trigger control unit.
The rectifier bridge carries out full-wave rectification to the alternating current for being tested inverter output, is changed into Rectified alternating current.
The capacitance-resistance matches cluster, including several resistance values and the paired capacitance-resistance parallel combination of capacity.Capacitance-resistance is joined
Counting the principle of matching is：1st, each group is consistent in the current peak factor of Rectified alternating current pressure work；2nd, bearing power value presses two
System aligned transfer.
The diode cluster, the diode matched comprising several quantity with capacitance-resistance parallel combination, is arranged on each capacitance-resistance
The upper end of parallel combination, plays one-way isolation, avoids coupled interference between each group capacitance-resistance parallel combination.
The DC solid-state relay cluster, the DC solid relay matched comprising several quantity with capacitance-resistance parallel combination
Device, be arranged on the lower end of each capacitance-resistance parallel combination, be each capacitance-resistance parallel combination is accessed and disjunction control.
The insulated gate bipolar transistor (IGBT) is connected to the point lower end in parallel of DC solid-state relay cluster, to capacitance-resistance
Match cluster and carry out break-make control with the pulsating direct current electric energy after rectification.
The trigger control unit control IGBT is turned on and off on appropriate opportunity.
Operation principle：
AC energy from tested inverter output end, become pulsating direct current electric energy under rectifier bridge effect；Triggering
The isolating transformer of control unit samples to tested inverter output AC voltage, by zero passage detection module by the mistake of voltage
Zero moment detects, then by light every the time reference signal that zero-acrross ing moment is synchronously transmitted to single-chip microcomputer；Single-chip microcomputer is according to setting
Program, on the basis of the time of zero crossing, be delayed output control signal, control insulated gate bipolar transistor (IGBT) conducting,
Inverter is to capacitance-resistance pairing cluster charging；Pass through certain time-delay, control insulated gate bipolar transistor (IGBT) shut-off, inverter again
Stop to capacitance-resistance pairing cluster charging.Change the time delay of turn-on and turn-off, it is possible to change what capacitance-resistance charging started and stopped
Opportunity.If turning on IGBT higher than the opportunity of the current terminal voltage value of electric capacity in supply voltage instantaneous value, higher charging is had
Peak point current；If the time of conducting is very short, the pulsewidth of tested inverter output current is very narrow, and virtual value reduces, and peak value
It is very high, thus current peak factor is heightened.Change the conducting combination rule of DC solid-state relay cluster, just can change access
Capacitance-resistance parallel combination marshalling rule, so as to change bearing power.Diode cluster by each capacitance-resistance parallel combination one-way isolation,
Intercouple interference when can avoid in parallel between each group and influencing characterisitic, it is handling to improve.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, it is clear that this area
Technical staff can to the utility model carry out it is various change and modification without departing from spirit and scope of the present utility model.This
Sample, if these modifications and variations of the present utility model belong to the utility model claims and its equivalent technologies scope it
Interior, then the utility model is also intended to comprising including these changes and modification.
Claims (4)
- A kind of 1. adjustable nonlinear load analogue means, it is characterised in that：Including rectifier bridge, capacitance-resistance pairing cluster, diode cluster, DC solid-state relay cluster, insulated gate bipolar transistor and trigger control unit；The rectifier bridge carries out full-wave rectification to the alternating current for being tested inverter output, is changed into Rectified alternating current；The diode cluster, capacitance-resistance pairing cluster, DC solid-state relay cluster are sequentially connected to the output end of rectifier bridge；The insulated gate bipolar transistor is connected to the point lower end in parallel of DC solid-state relay cluster, capacitance-resistance is matched cluster with it is whole Rectified alternating current after stream carries out break-make control；The trigger control unit is connected between the output end of rectifier bridge, for controlling the connection of insulated gate bipolar transistor And shut-off.
- A kind of 2. described adjustable nonlinear load analogue means according to claim 1, it is characterised in that：The diode Cluster includes several diodes in parallel；The capacitance-resistance pairing cluster includes quantity and diode identical capacitance-resistance pairing unit；Institute Stating DC solid-state relay cluster includes quantity and diode identical DC solid-state relay；Each diode pair answers a capacitance-resistance Pairing unit, the corresponding DC solid-state relay of each capacitance-resistance pairing unit；The positive pole of each diode and rectifier bridge it is defeated Go out end connection, negative pole is connected with the input of capacitance-resistance pairing unit, the output end and DC solid-state relay of capacitance-resistance pairing unit Positive pole connection, the colelctor electrode of the negative pole of DC solid-state relay and insulated gate bipolar transistor connects.
- A kind of 3. adjustable nonlinear load analogue means according to claim 2, it is characterised in that：The capacitance-resistance pairing Unit includes electric capacity and resistance, the electric capacity connection in parallel with a resistor.
- A kind of 4. adjustable nonlinear load analogue means according to claim 3, it is characterised in that：The triggering control Unit includes isolating transformer, zero passage detection module, light every, Voltage stabilizing module and single-chip microcomputer；The isolating transformer connection is tested Inverter output end；The output end of the isolating transformer is connected with the input of zero passage detection module, the zero passage detection mould Block is connected by light every with single-chip microcomputer input；The Voltage stabilizing module is powered for single-chip microcomputer；The single-chip microcomputer output connection is exhausted The control pole G ends of edge grid bipolar transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720975711.XU CN206948208U (en) | 2017-08-07 | 2017-08-07 | A kind of adjustable nonlinear load analogue means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720975711.XU CN206948208U (en) | 2017-08-07 | 2017-08-07 | A kind of adjustable nonlinear load analogue means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206948208U true CN206948208U (en) | 2018-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720975711.XU Expired - Fee Related CN206948208U (en) | 2017-08-07 | 2017-08-07 | A kind of adjustable nonlinear load analogue means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206948208U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107248821A (en) * | 2017-08-07 | 2017-10-13 | 重庆博昂科技有限公司 | A kind of nonlinear load analogue means |
-
2017
- 2017-08-07 CN CN201720975711.XU patent/CN206948208U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107248821A (en) * | 2017-08-07 | 2017-10-13 | 重庆博昂科技有限公司 | A kind of nonlinear load analogue means |
| CN107248821B (en) * | 2017-08-07 | 2023-04-18 | 重庆博昂科技有限公司 | Nonlinear load simulation device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180130 Termination date: 20200807 |
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| CF01 | Termination of patent right due to non-payment of annual fee |