CN110034544A - A kind of IGBT driving and wave limiting circuit control method - Google Patents
A kind of IGBT driving and wave limiting circuit control method Download PDFInfo
- Publication number
- CN110034544A CN110034544A CN201910224978.9A CN201910224978A CN110034544A CN 110034544 A CN110034544 A CN 110034544A CN 201910224978 A CN201910224978 A CN 201910224978A CN 110034544 A CN110034544 A CN 110034544A
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- Prior art keywords
- wave
- microprocessor
- limiting circuit
- wave limiting
- igbt
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
- H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the output circuit, e.g. short circuit
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of IGBT driving and wave limiting circuit control methods, belong to ups power band inductive load and rectified load field, itself the following steps are included: when S1, acquisition igbt transistor conducting in real time transformer current value, and the current value collected is transferred to wave limiting circuit；The current value collected is compared by S2, wave limiting circuit with setting current limit threshold, and when current value is more than setting current limit threshold, wave limiting circuit enables and generates wave limiting enable signal；S3, wave limiting enable signal are transferred to microprocessor by level shifting circuit, and microprocessor turns off igbt transistor；The electric current decline of S4, transformer, current value are connected again lower than setting current limit threshold, igbt transistor；S5, step S2 to S4 is repeated, until lower than setting current limit threshold, the present invention has the effect of that each current peak for exceeding main power tube limiting value accurate can be limited the current value of transformer when igbt transistor conducting.
Description
Technical field
The technical field with inductive load and rectified load that the present invention relates to ups powers, more particularly, to a kind of IGBT
Driving and wave limiting circuit control method.
Background technique
Ups power is that battery (mostly plumbic acid maintenance-free battery) is connected with host at present, passes through host inversion
Direct current is converted into the system equipment of alternating current by the modular circuits such as device.Inverter is that direct current energy (battery, battery) is changed
At the equipment of alternating current (generally 220V, 50Hz sine wave).The switching device of inverter is easy to be impacted by instantaneous large-current
And it damages, the switching device for needing to protect circuit to protect inverter thus.
Prior art among the above has the following deficiencies: that the inverter on ups power has multiple igbt transistors,
When the electric current that igbt transistor passes through exceeds the current peak of main power tube, big electricity that main power tube may pass through because of moment
It flows and causes to damage.
Summary of the invention
The object of the present invention is to provide a kind of IGBT driving and wave limiting circuit control methods, accurate can limit
Each exceeds the current peak of main power tube limiting value, protects main power tube well, improves system stability.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of IGBT driving and wave limiting circuit control method, comprising the following steps:
The current value of transformer when S1, acquisition igbt transistor conducting in real time, and the current value collected is transferred to by wave
Current-limiting circuit；
The current value collected is compared by S2, wave limiting circuit with setting current limit threshold, when current value is more than setting
When current limit threshold, wave limiting circuit enables and generates wave limiting enable signal；
S3, wave limiting enable signal are transferred to microprocessor by level shifting circuit, and microprocessor turns off igbt transistor；
The electric current decline of S4, transformer, wave limiting circuit stop output wave limiting enable signal, and current value is lower than setting limit
Threshold value is flowed, igbt transistor is connected again；
S5, step S2 to S4 is repeated, until the current value of transformer is lower than setting current limit threshold when igbt transistor conducting.
By using above scheme, in the shock load of ups power inverter or generation output short-circuit, wave limiting circuit
Automatic starting, control IGBT circuit first temporarily open circuit, then access again, rushes the switching device of inverter from instantaneous large-current
It hits and damages, it is accurate to limit each beyond main power tube limiting value by being detected together to all igbt transistors
Current peak protects main power tube well, improves system stability.
The present invention is further arranged to: step S1 is specifically configured to:
S1.1, current transformer is connect with igbt transistor, transformer when current transformer detects igbt transistor conducting
Current value.
By using above scheme, the current value of ups power inverter, current transformer inspection are detected by current transformer
Signal stabilization is surveyed, is installed fairly simple.
The present invention is further arranged to: step S2 is specifically configured to:
The current value collected is put small magnitude ratio by amplifying circuit and then exported by S2.1, wave limiting circuit；
Current value after putting small magnitude ratio is formed steamed bun wave after diode half-bridge rectifies by S2.2, wave limiting circuit；
Steamed bun wave is inputted comparison circuit by S2.3, wave limiting circuit, when steamed bun crest value is more than the reverse input end of comparator
Reference voltage when, comparator export wave limiting enable signal.
By using above scheme, wave limiting circuit is whole through over-discharge small magnitude ratio and half-bridge by the current value received
Stream, is transmitted further to comparison circuit and is compared, and guarantees that comparison circuit judging result is accurate.
The present invention is further arranged to: step S3 is specifically configured to:
Wave limiting enable signal is transferred to microprocessor by S3.1, level shifting circuit, and microprocessor stops to IGBT crystal
Pipe exports PWM wave, turns off igbt transistor.
By using above scheme, microprocessor controls igbt transistor on-off by control PWM wave, to control IGBT
Connecting and disconnecting of the circuit.
The present invention is further arranged to: further comprising the steps of:
S6, microprocessor memory real-time reception wave limiting circuit evolving steamed bun wave, memory store steamed bun wave peak
Value；
S7, timing microprocessor call the peak value of the steamed bun wave of microprocessor storage and make waveform according to the peak value of steamed bun wave
Waveform diagram is sent back to memory and stored by figure, microprocessor, while deleting the steamed bun of the correspondence waveform diagram stored in memory
The peak value of wave.
By using above scheme, user can understand ups power inverter in a period of time by checking waveform diagram
Current conditions, to judge whether ups power inverter needs to overhaul.
The present invention is further arranged to: further comprising the steps of:
S8, user send self-checking command to microprocessor, and microprocessor receives the waveform stored after self-checking command to memory
Figure is analyzed, and the part that wave limiting circuit works recently in waveform diagram is filtered out, and is calculated in a wave limiting circuit work
The turn-off number of times of igbt transistor in the time of work；
S9, when in the time that microprocessor calculates the work of a wave limiting circuit turn-off number of times of igbt transistor be more than 3
When secondary, microprocessor sends the portion waveshape figure.
By using above scheme, microprocessor is able to carry out self-test, and shock load or hair is occurred in ups power inverter
Current value variation record when raw output short-circuit is sent to user and checks, allows users to quickly and intuitively understand
The working condition of ups power inverter.
The present invention is further arranged to: step S8 is specifically configured to:
S8.1, microprocessor receive the waveform diagram for calling memory to store after self-checking command, choose current value in waveform diagram and exist
The part declined to a great extent in short time is as shutdown node；
Adjacent shutdown node is combined by S8.2, microprocessor, and adjacent shutdown node is made to form wave limiting circuit work
Make segment；
S8.3, microprocessor calculate the number of shutdown node in each wave limiting circuit work segment as a wave limiting
The turn-off number of times of igbt transistor in the time of circuit work.
By using above scheme, microprocessor by shutdown node and wave limiting circuit work segment screening come
Determine the turn-off number of times of igbt transistor in the time of wave limiting circuit work, sieving and grading is clear, automatically analyzes and patrols
It collects and stablizes, it is not easy to mistake occur.
The present invention is further arranged to: step 9 is specifically configured to:
S9.1, when in the time that microprocessor calculates the work of a wave limiting circuit turn-off number of times of igbt transistor be more than
At 3 times, microprocessor screens the portion waveshape figure；
S9.2, display device and microprocessor are attached, the waveform diagram filtered out is sent to display device by microprocessor
It is shown.
By using above scheme, user can be directly viewable waveform diagram by display device.
The present invention is further arranged to: step 9 further include:
S9.3, wireless communication apparatus and microprocessor are attached, the waveform diagram filtered out is sent to wirelessly by microprocessor
Waveform diagram is sent to the communication apparatus of user by communication device, wireless communication apparatus.
By using above scheme, waveform diagram can be sent to the communication apparatus of user by wireless communication apparatus, make user
It can be realized and remotely check information, it is more convenient.
The present invention is further arranged to: further comprising the steps of:
S10, microprocessor judge whether waveform diagram decline is in wave limiting circuit after receiving self-checking command every time
Working condition, when waveform diagram decline is in wave limiting circuit working state, microprocessor filter out in waveform diagram by
The part of wave current-limiting circuit last time work；
The turn-off number of times of igbt transistor in the waveform diagram that S11, microprocessor calculating sifting go out, when igbt transistor turn-off number of times
When more than setting number, microprocessor keeps igbt transistor in an off state.
By using above scheme, there is shock load in ups power inverter or output short-circuit occurs, while being limited by wave
When current circuit is long lasting for work, microprocessor automatically controls IGBT circuit breaker, and wave limiting circuit is avoided constantly to repeat
IGBT connecting and disconnecting of the circuit road is controlled, circuit is caused to damage.
In conclusion the invention has the following advantages:
1. wave limiting circuit starts automatically in the shock load of ups power inverter or generation output short-circuit, IGBT is controlled
Circuit first temporarily open circuit, then access again, makes the switching device of inverter impact and damage from instantaneous large-current, by institute
There is igbt transistor to detect together, it is accurate to limit each current peak for exceeding main power tube limiting value, it protects well
Main power tube has been protected, system stability is improved；
2. microprocessor is able to carry out self-test, when shock load is occurred in ups power inverter or output short-circuit occurs
Current value variation record is sent to user and checks, allows users to the work for quickly and intuitively understanding ups power inverter
Situation；
3. there is shock load in ups power inverter or output short-circuit occurring, while wave limiting circuit is long lasting for work
When making, microprocessor automatically controls IGBT circuit breaker, avoids the continuous Repetitive controller IGBT connecting and disconnecting of the circuit road of wave limiting circuit,
Circuit is caused to damage.
Detailed description of the invention
Fig. 1 is the circuit diagram of prominent current transformer part in embodiment one；
Fig. 2 is the circuit diagram of amplifying circuit in prominent wave limiting circuit in embodiment one；
Fig. 3 is the circuit diagram of comparison circuit in prominent wave limiting circuit in embodiment one.
Specific embodiment
Embodiment one: a kind of IGBT driving and wave limiting circuit control method, as depicted in figs. 1 and 2, specific steps are such as
Under:
S1, current transformer is connect with igbt transistor, the electricity of transformer when current transformer detects igbt transistor conducting
Flow valuve, and the current value collected is transferred to wave limiting circuit.
S2, in conjunction with Fig. 3, then the current value collected is put small magnitude ratio by amplifying circuit by wave limiting circuit
Output.Current value after putting small magnitude ratio is formed steamed bun wave after diode half-bridge rectifies by wave limiting circuit.By wave
Steamed bun wave is inputted comparison circuit by current-limiting circuit, when steamed bun crest value is more than the reference voltage of the reverse input end of comparator,
Comparator exports wave limiting enable signal.
S3, wave limiting enable signal are transferred to level shifting circuit, and level shifting circuit is by wave limiting enable signal
It is transferred to microprocessor, microprocessor stops exporting PWM wave to igbt transistor, turns off igbt transistor.
The electric current decline of S4, transformer, wave limiting circuit stop output wave limiting enable signal, and current value, which is lower than, to be set
Determine current limit threshold, igbt transistor is connected again.
S5, step S2 to S4 is repeated, until the current value of transformer is lower than setting current limit threshold when igbt transistor conducting.
In the shock load of ups power inverter or generation output short-circuit, wave limiting circuit starts automatically, controls IGBT
Circuit first temporarily open circuit, then access again, makes the switching device of inverter impact and damage from instantaneous large-current, by institute
There is igbt transistor to detect together, it is accurate to limit each current peak for exceeding main power tube limiting value, it protects well
Main power tube has been protected, system stability is improved.
Embodiment two, a kind of IGBT driving and wave limiting circuit control method, the difference of the present embodiment and embodiment one
It is, further comprising the steps of:
S6, microprocessor memory real-time reception wave limiting circuit evolving steamed bun wave, memory store steamed bun wave peak
Value.
S7, timing microprocessor call the peak value of the steamed bun wave of microprocessor storage, and microprocessor chooses the peak of steamed bun wave
Value is y-axis, and the time is x-axis, makes waveform diagram.Waveform diagram is sent back to memory and stored by microprocessor, while deleting storage
The peak value of the steamed bun wave of the correspondence waveform diagram stored in device.
S8, microprocessor receive the waveform diagram for calling memory to store after self-checking command, choose current value in waveform diagram
The part declined to a great extent in a short time is as shutdown node.Adjacent shutdown node is combined by microprocessor, is made adjacent
Shutdown node composition wave limiting circuit work segment.Microprocessor calculates shutdown in each wave limiting circuit work segment
The turn-off number of times of igbt transistor in the time that the number of node works as a wave limiting circuit.
S9, when the turn-off number of times of igbt transistor in the time that microprocessor calculates the work of a wave limiting circuit it is super
When crossing 3 times, microprocessor screens the portion waveshape figure.Display device and microprocessor are attached by user, micro- place
The waveform diagram filtered out is sent to display device and shown by reason device.Display equipment can be shown using LED display, host
The equipment that screen, multimedia equipment etc. can show image information.Wireless communication apparatus and microprocessor are attached by user, micro-
The waveform diagram filtered out is sent to wireless communication apparatus by processor, and waveform diagram is sent to the communication of user by wireless communication apparatus
Equipment.Wireless communication apparatus can be used for the module of wireless telecommunications using MDS data radio station, zigbee module, wifi module etc.
Plate.
S10, microprocessor judge whether waveform diagram decline is in wave limiting after receiving self-checking command every time
Circuit working state, when waveform diagram decline is in wave limiting circuit working state, microprocessor filters out waveform diagram
The part of middle wave limiting circuit last time work.The shutdown of igbt transistor in the waveform diagram that microprocessor calculating sifting goes out
Number, when igbt transistor turn-off number of times is more than setting number, microprocessor keeps igbt transistor in an off state.
User can understand the current conditions of ups power inverter in a period of time by checking waveform diagram, to judge
Whether ups power inverter, which needs, is overhauled.There is shock load in ups power inverter or output short-circuit occurs, while by wave
When current-limiting circuit is long lasting for work, microprocessor automatically controls IGBT circuit breaker, avoids wave limiting circuit constantly heavy
IGBT connecting and disconnecting of the circuit road is controlled again, and circuit is caused to damage.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of IGBT driving and wave limiting circuit control method, which comprises the following steps:
The current value of transformer when S1, acquisition igbt transistor conducting in real time, and the current value collected is transferred to by wave
Current-limiting circuit；
The current value collected is compared by S2, wave limiting circuit with setting current limit threshold, when current value is more than setting
When current limit threshold, wave limiting circuit enables and generates wave limiting enable signal；
S3, wave limiting enable signal are transferred to microprocessor by level shifting circuit, and microprocessor turns off igbt transistor；
The electric current decline of S4, transformer, wave limiting circuit stop output wave limiting enable signal, and current value is lower than setting limit
Threshold value is flowed, igbt transistor is connected again；
S5, step S2 to S4 is repeated, until the current value of transformer is lower than setting current limit threshold when igbt transistor conducting.
2. a kind of IGBT driving according to claim 1 and wave limiting circuit control method, which is characterized in that step S1
It is specifically configured to:
S1.1, current transformer is connect with igbt transistor, transformer when current transformer detects igbt transistor conducting
Current value.
3. a kind of IGBT driving according to claim 1 and wave limiting circuit control method, which is characterized in that step S2
It is specifically configured to:
The current value collected is put small magnitude ratio by amplifying circuit and then exported by S2.1, wave limiting circuit；
Current value after putting small magnitude ratio is formed steamed bun wave after diode half-bridge rectifies by S2.2, wave limiting circuit；
Steamed bun wave is inputted comparison circuit by S2.3, wave limiting circuit, when steamed bun crest value is more than the reverse input end of comparator
Reference voltage when, comparator export wave limiting enable signal.
4. a kind of IGBT driving according to claim 1 and wave limiting circuit control method, which is characterized in that step S3
It is specifically configured to:
Wave limiting enable signal is transferred to microprocessor by S3.1, level shifting circuit, and microprocessor stops to IGBT crystal
Pipe exports PWM wave, turns off igbt transistor.
5. a kind of IGBT driving according to claim 3 and wave limiting circuit control method, which is characterized in that further include
Following steps:
S6, microprocessor memory real-time reception wave limiting circuit evolving steamed bun wave, memory store steamed bun wave peak
Value；
S7, timing microprocessor call the peak value of the steamed bun wave of microprocessor storage and make waveform according to the peak value of steamed bun wave
Waveform diagram is sent back to memory and stored by figure, microprocessor, while deleting the steamed bun of the correspondence waveform diagram stored in memory
The peak value of wave.
6. a kind of IGBT driving according to claim 5 and wave limiting circuit control method, which is characterized in that further include
Following steps:
S8, user send self-checking command to microprocessor, and microprocessor receives the waveform stored after self-checking command to memory
Figure is analyzed, and the part that wave limiting circuit works recently in waveform diagram is filtered out, and is calculated in a wave limiting circuit work
The turn-off number of times of igbt transistor in the time of work；
S9, when in the time that microprocessor calculates the work of a wave limiting circuit turn-off number of times of igbt transistor be more than 3
When secondary, microprocessor sends the portion waveshape figure.
7. a kind of IGBT driving according to claim 6 and wave limiting circuit control method, which is characterized in that step S8
It is specifically configured to:
S8.1, microprocessor receive the waveform diagram for calling memory to store after self-checking command, choose current value in waveform diagram and exist
The part declined to a great extent in short time is as shutdown node；
Adjacent shutdown node is combined by S8.2, microprocessor, and adjacent shutdown node is made to form wave limiting circuit work
Make segment；
S8.3, microprocessor calculate the number of shutdown node in each wave limiting circuit work segment as a wave limiting
The turn-off number of times of igbt transistor in the time of circuit work.
8. a kind of IGBT driving according to claim 6 and wave limiting circuit control method, which is characterized in that step 9
It is specifically configured to:
S9.1, when in the time that microprocessor calculates the work of a wave limiting circuit turn-off number of times of igbt transistor be more than
At 3 times, microprocessor screens the portion waveshape figure；
S9.2, display device and microprocessor are attached, the waveform diagram filtered out is sent to display device by microprocessor
It is shown.
9. a kind of IGBT driving according to claim 8 and wave limiting circuit control method, which is characterized in that step 9
Further include:
S9.3, wireless communication apparatus and microprocessor are attached, the waveform diagram filtered out is sent to wirelessly by microprocessor
Waveform diagram is sent to the communication apparatus of user by communication device, wireless communication apparatus.
10. a kind of IGBT driving according to claim 6 and wave limiting circuit control method, which is characterized in that also wrap
Include following steps:
S10, microprocessor judge whether waveform diagram decline is in wave limiting circuit after receiving self-checking command every time
Working condition, when waveform diagram decline is in wave limiting circuit working state, microprocessor filter out in waveform diagram by
The part of wave current-limiting circuit last time work；
The turn-off number of times of igbt transistor in the waveform diagram that S11, microprocessor calculating sifting go out, when igbt transistor turn-off number of times
When more than setting number, microprocessor keeps igbt transistor in an off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910224978.9A CN110034544B (en) | 2019-03-25 | 2019-03-25 | IGBT driving and wave-by-wave current limiting circuit control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910224978.9A CN110034544B (en) | 2019-03-25 | 2019-03-25 | IGBT driving and wave-by-wave current limiting circuit control method |
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| Publication Number | Publication Date |
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| CN110034544A true CN110034544A (en) | 2019-07-19 |
| CN110034544B CN110034544B (en) | 2022-07-15 |
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| CN110034544B (en) | 2022-07-15 |
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