CN108646165B - A kind of method, system and controller improving Technics of Power Electronic Conversion equipment safety - Google Patents
A kind of method, system and controller improving Technics of Power Electronic Conversion equipment safety Download PDFInfo
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- CN108646165B CN108646165B CN201810324944.2A CN201810324944A CN108646165B CN 108646165 B CN108646165 B CN 108646165B CN 201810324944 A CN201810324944 A CN 201810324944A CN 108646165 B CN108646165 B CN 108646165B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2834—Automated test systems [ATE]; using microprocessors or computers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2839—Fault-finding or characterising using signal generators, power supplies or circuit analysers
- G01R31/2841—Signal generators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2843—In-circuit-testing
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25252—Microprocessor
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- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Automation & Control Theory (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of methods for improving Technics of Power Electronic Conversion equipment safety, it is to apply in pwm signal detection circuit, it include: when receiving from the enabling signal or reset signal of microprocessor circuit, the multi-channel PWM signal that circuit evolving occurs to pwm signal samples, to obtain per switch state of the pwm signal in sampling instant all the way, judge that obtained all pwm signals combinations of states of switching device when whether the switch state of sampling instant works normally with the main circuit of Technics of Power Electronic Conversion device is consistent, block signal is sent to all exclusive circuits if inconsistent, with the output end of close-lock circuit, circuit occurs to microprocessor circuit and/or pwm signal and sends status information, it include switch state of all multi-channel PWM signals in sampling instant in the status information.The present invention, which is able to solve present in existing fault detection method, can not detect since the technical issues of main circuit failure caused by exception or mistake occurs in pwm signal.
Description
Technical field
The invention belongs to power electronics fields, more particularly, to a kind of raising Technics of Power Electronic Conversion equipment safety
Method, system and the controller of property.
Background technique
With the continuous development of power electronic devices and control technology, Technics of Power Electronic Conversion device industrial electric driving,
Communications and transportation, electric system, communication system and new energy field are widely applied.At the same time, power electronics becomes
The voltage class and current class of switching device in changing device are also higher and higher, thus to the safety of Technics of Power Electronic Conversion device
Stable operation ability proposes more stringent requirement.
Currently, the method for the main circuit failure of detection Technics of Power Electronic Conversion device is mainly to pass through to detect each of the main circuit
Item parameter (such as electric current, voltage, temperature etc.) Lai Shixian.
However, above-mentioned detection method there is a problem of one it is very important, it is defeated in the controller of Technics of Power Electronic Conversion device
Out pulse width modulation (Pulse width modulation, abbreviation PWM) signal during, due to occur fault,
Program mal and external disturbance so that pwm signal can be made exception or mistake occur, and then lead to controlled power electronics
There are the failures such as fluctuation of service, short circuit in the main circuit of converting means, and existing detection method can not detect this feelings
The failure caused by under condition.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of raising Technics of Power Electronic Conversion devices
Method, system and the controller of safety, it is intended that solving the main circuit fault detection of existing Technics of Power Electronic Conversion device
It can not be detected present in method since the technical issues of main circuit failure caused by exception or mistake occurs in pwm signal.
To achieve the above object, according to one aspect of the present invention, a kind of raising Technics of Power Electronic Conversion device peace is provided
The method of full property, is to apply in pwm signal detection circuit, the described method comprises the following steps:
(1) when receiving from the enabling signal or reset signal of microprocessor circuit, circuit is occurred to pwm signal
The multi-channel PWM signal of generation is sampled, to obtain per switch state of the pwm signal in sampling instant all the way；
(2) all pwm signals that judgment step (1) obtains sampling instant switch state whether with Technics of Power Electronic Conversion
The combinations of states of switching device is consistent when the main circuit of device works normally, and return step (1) continues to sample if consistent
Otherwise journey is transferred to step (3)；
(3) Xiang Suoyou exclusive circuit sends block signal, with the output end of close-lock circuit.
(4) circuit occurs to microprocessor circuit and/or pwm signal and sends status information, include institute in the status information
There is multi-channel PWM signal in the switch state of sampling instant.
(5) repeat the above steps (1) to (4), until receiving from the shutdown signal of microprocessor circuit, mistake
Journey terminates.
Preferably, circuit and multiple exclusive circuits occur for pwm signal detection circuit and microprocessor circuit, pwm signal
Collectively constitute the controller of Technics of Power Electronic Conversion device.
Preferably, circuit occurs for pwm signal detection circuit and microprocessor circuit, pwm signal and exclusive circuit is distinguished
The output end of connection, microprocessor circuit is connect with the input terminal that circuit occurs for pwm signal, and the output of circuit occurs for pwm signal
End is connect with the input terminal of exclusive circuit, and the output end of exclusive circuit is connect with the main circuit of Technics of Power Electronic Conversion device.
Preferably, the number of the pwm signal of pwm signal generation circuit evolving and the main circuit of Technics of Power Electronic Conversion device
Switching device number is consistent, and the quantity of exclusive circuit and the number of pwm signal are identical.
It is to answer it is another aspect of this invention to provide that providing a kind of system for improving Technics of Power Electronic Conversion equipment safety
In pwm signal detection circuit, the system comprises:
First module, for believing PWM when receiving from the enabling signal or reset signal of microprocessor circuit
The multi-channel PWM signal that circuit evolving number occurs is sampled, to obtain per switch state of the pwm signal in sampling instant all the way；
Second module, for judge all pwm signals that the first module obtains sampling instant switch state whether with
The combinations of states of switching device is consistent when the main circuit of Technics of Power Electronic Conversion device works normally, and returns to the first mould if consistent
Block continues sampling process, is otherwise transferred to third module；
Third module, for sending block signal to all exclusive circuits, with the output end of close-lock circuit.
4th module sends status information, state letter for circuit to occur to microprocessor circuit and/or pwm signal
It include switch state of all multi-channel PWM signals in sampling instant in breath.
5th module, for repeating above-mentioned first module to the 4th module, until receiving from microprocessor circuit
Shutdown signal until, process terminates.
It is another aspect of this invention to provide that providing a kind of controller of Technics of Power Electronic Conversion device comprising pwm signal
Circuit and multiple exclusive circuits occur for detection circuit, microprocessor circuit, pwm signal, store in pwm signal detection circuit
There is computer instruction, when which is executed by processor, realizes that it includes pwm signal detection circuit, microprocessor circuit, PWM
Signal generating circuit and multiple exclusive circuits, which is characterized in that it is stored with computer instruction in pwm signal detection circuit, it should
The step of instruction is when being executed by processor, and realizes the above method.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
(1) present invention increases pwm signal detection circuit, it can be achieved that occurring in the controller of Technics of Power Electronic Conversion device
The quick detection of the pwm signal of failure；
(2) since method of the invention can judge all pwm signals in the switch state of sampling instant by step (2)
Whether the combinations of states of switching device is consistent when working normally with the main circuit of Technics of Power Electronic Conversion device quickly determines multichannel
Whether pwm signal breaks down, and is in time latched the pwm signal when pwm signal breaks down by step (3), thus
The protection to main circuit is quickly realized, main circuit is prevented because of the pwm signal of mistake and the failures such as short circuit occurs；
(3) present invention by step (4) realize to the record of the switch state of fault moment multi-channel PWM signal and on
It passes, is easy to implement the accurate positionin of the pwm signal to break down, and the ex-post analysis of the pwm signal to break down provides
Data basis；
(4) present invention can be convenient realization to combinations of states involved by this method by the cooperation with microprocessor circuit
Parameter is flexibly modified；
(5) Method And Principle of the invention is simple, swift to operate, and stability is high, is easy to large-scale use and popularization.
Detailed description of the invention
Fig. 1 is the applied environment figure for the method that the present invention improves Technics of Power Electronic Conversion equipment safety.
Fig. 2 is the flow chart for the method that the present invention improves Technics of Power Electronic Conversion equipment safety.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
As shown in Figure 1, the method that the present invention improves Technics of Power Electronic Conversion equipment safety, is to apply to detect in pwm signal
In circuit, circuit and common group of multiple exclusive circuits occur for the pwm signal detection circuit and microprocessor circuit, pwm signal
At the controller of Technics of Power Electronic Conversion device, pwm signal detection circuit and microprocessor circuit, pwm signal occur circuit and
Exclusive circuit is separately connected, and the input terminal of pwm signal detection circuit is connect with the output end that circuit occurs for pwm signal, micro process
The output end of device circuit is connect with the input terminal that circuit occurs for pwm signal, and the output end and exclusive circuit of circuit occur for pwm signal
Input terminal connection, the output end of exclusive circuit connect with the main circuit of Technics of Power Electronic Conversion device.
As shown in Fig. 2, embodiment there is provided a kind of raising Technics of Power Electronic Conversion equipment safeties for one kind according to the present invention
The method of property, comprising the following steps:
(1) when receiving from the enabling signal or reset signal of microprocessor circuit, circuit is occurred to pwm signal
The multi-channel PWM signal of generation is sampled, to obtain per switch state of the pwm signal in sampling instant all the way；
Specifically, the frequency sampled in this step to pwm signal is greater than or equal to 20MHz, the switch of PMW signal
State is exactly the low and high level of the pwm signal.
The derailing switch of the number of the pwm signal of circuit evolving and the main circuit of Technics of Power Electronic Conversion device occurs for pwm signal
Part number is consistent.For example, switching device number is 4, then if the main circuit of Technics of Power Electronic Conversion device is H bridge inverter
The pwm signal that circuit evolving occurs for pwm signal is 4 tunnels；If the main circuit of Technics of Power Electronic Conversion device includes N number of derailing switch
Part, then it is the road N that the pwm signal of circuit evolving, which occurs, for pwm signal.
(2) all pwm signals that judgment step (1) obtains sampling instant switch state whether with Technics of Power Electronic Conversion
The combinations of states of switching device is consistent when the main circuit of device works normally, and return step (1) continues to sample if consistent
Otherwise journey is transferred to step (3)；
For example, combinations of states one is shared if the main circuit of H bridge Technics of Power Electronic Conversion device includes 4 switching devices
16 kinds, wherein the condition for enabling the main circuit to work normally is, the state of 4 switching devices is respectively 1,0,1,0 or 0,
1,0,1 or 0,0,0,0 or 0,0,0,1 or 0,0,1,0 or 0,1,0,0 or 1,0,0,0 or 1,1,0,
0 or 0,0,1,1,.If all 4 roads pwm signal that step (1) obtains sampling instant switch state be 1,0,1,0 or
Person 0,1, and 0,1, then the pwm signal enables to main circuit to work normally；If all 4 roads pwm signal that step (1) obtains exists
The switch state of sampling instant is 1,1,1,1, then the 4 road pwm signal can drive all switch device conductives in main circuit, thus
Serious short trouble occurs, causes device failure；Therefore lock operation is carried out to this pwm signal of similar the latter.
It should be understood that the main circuit of Technics of Power Electronic Conversion device is in normal work, switching device in the main circuit
State and combinations of states be that those skilled in the art know, details are not described herein.
(3) Xiang Suoyou exclusive circuit sends block signal, with the output end of close-lock circuit.
Specifically, the quantity of the exclusive circuit in the present invention is identical as the number of pwm signal.In the present embodiment,
Exclusive circuit is to be realized by NAND gate, but the present invention is not limited thereto, can by analog circuit, digital circuit or
The combination of analog circuit and digital circuit is realized.
Pwm signal due to switching device to the duration less than T is not responded and (is limited by the switching device response time),
Therefore the detection to pwm signal is completed in step (2), and when this step transmits block signal to exclusive circuit, locking electricity
Road is not yet to switching device output pwm signal.Wherein T is preset threshold, and value is each according to the different driving chip of use
It is different, between generally 200ns-400ns.
When in the controller of Technics of Power Electronic Conversion device due to element fault, program error, external disturbance, internal electric source wave
When the pwm signal of reasons generation error such as dynamic, it can be latched the pwm signal that mistake occurs through the above steps, and prevent
The failures such as main circuit short circuit.
(4) circuit occurs to microprocessor circuit and/or pwm signal and sends status information, include institute in the status information
There is multi-channel PWM signal in the switch state of sampling instant.
(5) repeat the above steps (1) to (4), until receiving from the shutdown signal of microprocessor circuit, mistake
Journey terminates.
Another embodiment according to the present invention, providing a kind of Technics of Power Electronic Conversion equipment safety of improving is
System, is applied in pwm signal detection circuit, and electricity occurs for the pwm signal detection circuit and microprocessor circuit, pwm signal
Road and multiple exclusive circuits collectively constitute the controller of Technics of Power Electronic Conversion device, pwm signal detection circuit and microprocessor
Circuit occurs for circuit, pwm signal and exclusive circuit is separately connected, and electricity occurs for the output end and pwm signal of microprocessor circuit
The input terminal on road connects, and the input terminal of circuit occurs for pwm signal output end and exclusive circuit connects, the output end of exclusive circuit
It is connect with the main circuit of Technics of Power Electronic Conversion device, the system comprises:
First module, for believing PWM when receiving from the enabling signal or reset signal of microprocessor circuit
The multi-channel PWM signal that circuit evolving number occurs is sampled, to obtain per switch state of the pwm signal in sampling instant all the way；
Specifically, the frequency sampled in this step to pwm signal is greater than or equal to 20MHz, the switch of PMW signal
State is exactly the low and high level of the pwm signal.
The derailing switch of the number of the pwm signal of circuit evolving and the main circuit of Technics of Power Electronic Conversion device occurs for pwm signal
Part number is consistent.For example, switching device number is 4, then if the main circuit of Technics of Power Electronic Conversion device is H bridge inverter
The pwm signal that circuit evolving occurs for pwm signal is 4 tunnels；If the main circuit of Technics of Power Electronic Conversion device includes N number of derailing switch
Part, then it is the road N that the pwm signal of circuit evolving, which occurs, for pwm signal.
Second module, for judge all pwm signals that the first module obtains sampling instant switch state whether with
The combinations of states of switching device is consistent when the main circuit of Technics of Power Electronic Conversion device works normally, and returns to the first mould if consistent
Block continues sampling process, is otherwise transferred to third module；
For example, combinations of states one is shared if the main circuit of H bridge Technics of Power Electronic Conversion device includes 4 switching devices
16 kinds, wherein the condition for enabling the main circuit to work normally is, the state of 4 switching devices is respectively 1,0,1,0 or 0,
1,0,1 or 0,0,0,0 or 0,0,0,1 or 0,0,1,0 or 0,1,0,0 or 1,0,0,0 or 1,1,0,
0 or 0,0,1,1,.If all 4 roads pwm signal that step (1) obtains sampling instant switch state be 1,0,1,0 or
Person 0,1, and 0,1, then the pwm signal enables to main circuit to work normally；If all 4 roads pwm signal that step (1) obtains exists
The switch state of sampling instant is 1,1,1,1, then the 4 road pwm signal can drive all switch device conductives in main circuit, thus
Serious short trouble occurs, causes device failure；Therefore lock operation is carried out to this pwm signal of similar the latter.
It should be understood that the main circuit of Technics of Power Electronic Conversion device is in normal work, switching device in the main circuit
State and combinations of states be that those skilled in the art know, details are not described herein.
Third module, for sending block signal to all exclusive circuits, with the output end of close-lock circuit.
Specifically, the quantity of the exclusive circuit in the present invention is identical as the number of pwm signal.In the present embodiment,
Exclusive circuit is to be realized by NAND gate, but the present invention is not limited thereto, can by analog circuit, digital circuit or
The combination of analog circuit and digital circuit is realized.
Pwm signal due to switching device to the duration less than T is not responded and (is limited by the switching device response time),
Therefore the detection to pwm signal is completed in step (2), and when this step transmits block signal to exclusive circuit, locking electricity
Road is not yet to switching device output pwm signal.Wherein T is preset threshold, and value is each according to the different driving chip of use
It is different, between generally 200ns-400ns.
When in the controller of Technics of Power Electronic Conversion device due to element fault, program error, external disturbance, internal electric source wave
When the pwm signal of reasons generation error such as dynamic, it can be latched the pwm signal that mistake occurs through the above steps, and prevent
The failures such as main circuit short circuit.
4th module sends status information, state letter for circuit to occur to microprocessor circuit and/or pwm signal
It include switch state of all multi-channel PWM signals in sampling instant in breath.
5th module, for repeating above-mentioned first module to the 4th module, until receiving from microprocessor circuit
Shutdown signal until, process terminates.
It is according to the present invention another embodiment there is provided a kind of controllers of Technics of Power Electronic Conversion device comprising
Circuit and multiple exclusive circuits, pwm signal detection circuit occur for pwm signal detection circuit, microprocessor circuit, pwm signal
Circuit occurs with microprocessor circuit, pwm signal and exclusive circuit is separately connected, the output end and PWM of microprocessor circuit
The input terminal of signal generating circuit connects, and the input terminal of circuit occurs for pwm signal output end and exclusive circuit connects, locking electricity
The output end on road is connect with the main circuit of Technics of Power Electronic Conversion device, is wherein stored with computer in pwm signal detection circuit and is referred to
It enables, when which is executed by processor, performs the steps of
(1) when receiving from the enabling signal or reset signal of microprocessor circuit, circuit is occurred to pwm signal
The multi-channel PWM signal of generation is sampled, to obtain per switch state of the pwm signal in sampling instant all the way；
Specifically, the frequency sampled in this step to pwm signal is greater than or equal to 20MHz, the switch of PMW signal
State is exactly the low and high level of the pwm signal.
The derailing switch of the number of the pwm signal of circuit evolving and the main circuit of Technics of Power Electronic Conversion device occurs for pwm signal
Part number is consistent.For example, switching device number is 4, then if the main circuit of Technics of Power Electronic Conversion device is H bridge inverter
The pwm signal that circuit evolving occurs for pwm signal is 4 tunnels；If the main circuit of Technics of Power Electronic Conversion device includes N number of derailing switch
Part, then it is the road N that the pwm signal of circuit evolving, which occurs, for pwm signal.
(2) all pwm signals that judgment step (1) obtains sampling instant switch state whether with Technics of Power Electronic Conversion
The combinations of states of switching device is consistent when the main circuit of device works normally, and return step (1) continues to sample if consistent
Otherwise journey is transferred to step (3)；
For example, combinations of states one is shared if the main circuit of H bridge Technics of Power Electronic Conversion device includes 4 switching devices
16 kinds, wherein the condition for enabling the main circuit to work normally is, the state of 4 switching devices is respectively 1,0,1,0 or 0,
1,0,1 or 0,0,0,0 or 0,0,0,1 or 0,0,1,0 or 0,1,0,0 or 1,0,0,0 or 1,1,0,
0 or 0,0,1,1,.If all 4 roads pwm signal that step (1) obtains sampling instant switch state be 1,0,1,0 or
Person 0,1, and 0,1, then the pwm signal enables to main circuit to work normally；If all 4 roads pwm signal that step (1) obtains exists
The switch state of sampling instant is 1,1,1,1, then the 4 road pwm signal can drive all switch device conductives in main circuit, thus
Serious short trouble occurs, causes device failure；Therefore lock operation is carried out to this pwm signal of similar the latter.
It should be understood that the main circuit of Technics of Power Electronic Conversion device is in normal work, switching device in the main circuit
State and combinations of states be that those skilled in the art know, details are not described herein.
(3) Xiang Suoyou exclusive circuit sends block signal, with the output end of close-lock circuit.
Specifically, the quantity of the exclusive circuit in the present invention is identical as the number of pwm signal.In the present embodiment,
Exclusive circuit is to be realized by NAND gate, but the present invention is not limited thereto, can by analog circuit, digital circuit or
The combination of analog circuit and digital circuit is realized.
Pwm signal due to switching device to the duration less than T is not responded and (is limited by the switching device response time),
Therefore the detection to pwm signal is completed in step (2), and when this step transmits block signal to exclusive circuit, locking electricity
Road is not yet to switching device output pwm signal.Wherein T is preset threshold, and value is each according to the different driving chip of use
It is different, between generally 200ns-400ns.
When in the controller of Technics of Power Electronic Conversion device due to element fault, program error, external disturbance, internal electric source wave
When the pwm signal of reasons generation error such as dynamic, it can be latched the pwm signal that mistake occurs through the above steps, and prevent
The failures such as main circuit short circuit.
(4) circuit occurs to microprocessor circuit and/or pwm signal and sends status information, include institute in the status information
There is multi-channel PWM signal in the switch state of sampling instant.
(5) repeat the above steps (1) to (4), until receiving from the shutdown signal of microprocessor circuit, mistake
Journey terminates.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of method for improving Technics of Power Electronic Conversion equipment safety, is to apply in pwm signal detection circuit, feature exists
In the described method comprises the following steps:
(1) when receiving from the enabling signal or reset signal of microprocessor circuit, circuit evolving is occurred to pwm signal
Multi-channel PWM signal sampled, to obtain per pwm signal all the way in the switch state of sampling instant, wherein pwm signal is detected
Circuit connection occurs for circuit and pwm signal；
(2) all pwm signals that judgment step (1) obtains sampling instant switch state whether with Technics of Power Electronic Conversion device
Main circuit switching device when working normally combinations of states it is consistent, return step (1) continues sampling process if consistent, no
Step (3) are then transferred to, wherein the number of the pwm signal of circuit evolving and the main electricity of Technics of Power Electronic Conversion device occur for pwm signal
The switching device number on road is consistent；
(3) Xiang Suoyou exclusive circuit sends block signal, with the output end of close-lock circuit, wherein the quantity of exclusive circuit with
The number of pwm signal is identical；
(4) circuit occurs to microprocessor circuit and/or pwm signal and sends status information, include all more in the status information
Switch state of the road pwm signal in sampling instant；
(5) repeat the above steps (1) to (4), until receiving from the shutdown signal of microprocessor circuit, process knot
Beam.
2. the method according to claim 1, wherein pwm signal detection circuit and microprocessor circuit, PWM believe
Number the controller that circuit and multiple exclusive circuits collectively constitute Technics of Power Electronic Conversion device occurs.
3. method according to claim 1 or 2, which is characterized in that
Pwm signal detection circuit is separately connected with microprocessor circuit and exclusive circuit；
The output end of microprocessor circuit is connect with the input terminal that circuit occurs for pwm signal；
The input terminal of circuit occurs for pwm signal output end and exclusive circuit connects；
The output end of exclusive circuit is connect with the main circuit of Technics of Power Electronic Conversion device.
4. a kind of system for improving Technics of Power Electronic Conversion equipment safety, is to apply in pwm signal detection circuit, feature exists
In, the system comprises:
First module, for sending out pwm signal when receiving from the enabling signal or reset signal of microprocessor circuit
The multi-channel PWM signal of raw circuit evolving is sampled, to obtain the switch state per pwm signal all the way in sampling instant, wherein
Circuit connection occurs for pwm signal detection circuit and pwm signal；
Second module, for judge all pwm signals that the first module obtains sampling instant switch state whether with electric power
The combinations of states of switching device is consistent when the main circuit of electronics converting means works normally, returned if consistent first module after
Continuous sampling process, is otherwise transferred to third module, and wherein the number and power electronics of the pwm signal of circuit evolving occur for pwm signal
The switching device number of the main circuit of converting means is consistent；
Third module, for sending block signal to all exclusive circuits, with the output end of close-lock circuit, wherein locking electricity
The quantity on road and the number of pwm signal are identical；
4th module sends status information for circuit to occur to microprocessor circuit and/or pwm signal, in the status information
Including all multi-channel PWM signals sampling instant switch state；
5th module, for repeating above-mentioned first module to the 4th module, until receiving from the pass of microprocessor circuit
Until closing signal, process terminates.
5. system according to claim 4, which is characterized in that pwm signal detection circuit and microprocessor circuit, PWM believe
Number the controller that circuit and multiple exclusive circuits collectively constitute Technics of Power Electronic Conversion device occurs.
6. system according to claim 4 or 5, which is characterized in that
Pwm signal detection circuit is separately connected with microprocessor circuit and exclusive circuit；
The output end of microprocessor circuit is connect with the input terminal that circuit occurs for pwm signal；
The input terminal of circuit occurs for pwm signal output end and exclusive circuit connects；
The output end of exclusive circuit is connect with the main circuit of Technics of Power Electronic Conversion device.
7. a kind of controller of Technics of Power Electronic Conversion device comprising pwm signal detection circuit, microprocessor circuit, pwm signal
Circuit and multiple exclusive circuits occurs, which is characterized in that circuit connection, PWM occur for pwm signal detection circuit and pwm signal
It is stored with computer instruction in signal deteching circuit, when which is executed by processor, realizes any one in claims 1 to 3
The step of item the method.
8. controller according to claim 7, which is characterized in that
Pwm signal detection circuit is separately connected with microprocessor circuit and exclusive circuit；
The output end of microprocessor circuit is connect with the input terminal that circuit occurs for pwm signal；
The input terminal of circuit occurs for pwm signal output end and exclusive circuit connects；
The output end of exclusive circuit is connect with the main circuit of Technics of Power Electronic Conversion device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810324944.2A CN108646165B (en) | 2018-04-12 | 2018-04-12 | A kind of method, system and controller improving Technics of Power Electronic Conversion equipment safety |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202034894U (en) * | 2011-05-10 | 2011-11-09 | 山东蓝天电能科技有限公司 | IGBT trigger device with redundancy function |
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