CN111426933A - Safety type power electronic module and safety detection method thereof - Google Patents
Safety type power electronic module and safety detection method thereof Download PDFInfo
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- CN111426933A CN111426933A CN202010424796.9A CN202010424796A CN111426933A CN 111426933 A CN111426933 A CN 111426933A CN 202010424796 A CN202010424796 A CN 202010424796A CN 111426933 A CN111426933 A CN 111426933A
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Abstract
The invention discloses a safe power electronic module and a safe detection method thereof, wherein the safe power electronic module comprises an IGBT unit and a signal acquisition unit, the IGBT unit is electrically connected with the signal acquisition unit, the signal acquisition unit acquires voltage, current and temperature of the IGBT unit in a working state in real time to obtain a sample combination, and an intelligent diagnosis and service life prediction unit receives the sample combination sent by the signal acquisition unit and processes the sample combination to form a diagnosis result. The invention discloses a safe power electronic module and a safety detection method thereof, which can acquire and detect the working state of a power electronic module (IGBT unit) in real time and carry out measures such as remote display, processing, alarm and the like according to different working states.
Description
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to a safety type power electronic module and a safety detection method of the safety type power electronic module.
Background
With the development of power electronic technology, the structure of a power electronic system is complicated, which includes a plurality of power electronic modules with different functions, and it is very important to maintain and protect the normal operation of the power electronic system.
The publication number is: CN105225895B, entitled Intelligent DC contactor invention patent, its technical scheme discloses "including power module, instruction signal module, single chip module, relay module, power electronic module and voltage detection module; the single chip microcomputer module is electrically connected with the power supply module, the instruction signal module, the relay module, the power electronic module and the voltage detection module respectively; the power module consists of a power end and a load end; the voltage detection module is connected between the power supply end and the load end and is used for detecting the voltage of the power supply module; the relay module and the power electronic module are connected in parallel and then connected between a power supply end and a load end; the single chip microcomputer module controls the relay module and the power electronic module to be respectively switched on and off; the power electronic module and the relay module form an execution unit of the arc-free direct current switch together; the relay module consists of a relay drive circuit and a relay, and realizes the on-off control of the relay by the singlechip module; the power electronic module consists of a power electronic driving circuit and a power electronic element and realizes the on-off control of the single chip microcomputer module on the power electronic element; when the power electronic module needs to be powered on, firstly, the power electronic module is powered on, the voltage of a relay contact is reduced to be close to zero, the relay is closed, and the power electronic element is disconnected in the third step, so that the continuous current only flows through the relay; in the opening process, the power electronic element is closed in the first step, the relay is opened in the second step, and the power electronic element is opened in the third step, so that the opening process of the direct current contactor is completed.
Taking the above invention patent as an example, although the power electronic module is mentioned, the technical problem solved by the invention is as follows: the problem of direct current power supply protection of the electric automobile is solved, and the direct current power supply protection device is different from the direct current power supply protection device, so that the direct current power supply protection device is further improved aiming at the problem.
Disclosure of Invention
The invention mainly aims to provide a safe power electronic module and a safety detection method thereof, which can acquire and detect the working state of the power electronic module (IGBT unit) in real time and carry out measures such as remote display, processing, alarm and the like according to different working states.
The invention also aims to provide a safe power electronic module and a safety detection method thereof, which have the advantages of high safety, quick acquisition, high detection efficiency and the like.
In order to achieve the above object, the present invention provides a safety detection method for a safety power electronic module, which is used for the safety detection of an IGBT unit, and comprises the following steps:
step S1: the IGBT unit is electrically connected with the signal acquisition unit, and the signal acquisition unit acquires voltage, current and temperature of the IGBT unit in a working state in real time to obtain a sample combination;
step S2: the intelligent diagnosis and life prediction unit receives the sample combination sent by the signal acquisition unit and processes the sample combination to form a diagnosis result;
step S3: the communication unit receives the diagnosis result sent by the intelligent diagnosis and service life prediction unit, is wirelessly connected with the display controller and is used for remotely displaying and processing;
step S4: and the alarm unit receives the diagnosis result sent by the intelligent diagnosis and service life prediction unit and selects a working state according to the diagnosis result.
As a further preferable embodiment of the above technical means, step S2 is specifically implemented as the following steps:
step S2.1: the intelligent diagnosis and service life prediction unit receives sample combinations of the IGBT units sent by the signal acquisition unit under different working states;
step S2.2: the intelligent diagnosis and life prediction unit clusters the sample combination to form a new sample combination;
step S2.3: preprocessing the new sample combination;
step S2.4: training the preprocessed sample combination to form a long-term and short-term memory model;
step S2.5: and judging the safety level of the actual working state of the IGBT unit according to the trained long-term and short-term memory module to form a diagnosis result.
As a further preferred embodiment of the above technical solution, step S2.5 is specifically implemented as the following steps:
step S2.5.1: if the distance between the trained long and short term memory module and the actual working state of the IGBT unit is 0-5%, the safety level of the IGBT unit is judged to be high;
step S2.5.2: if the up-down floating distance between the trained long-term and short-term memory module and the actual working state of the IGBT unit is 5% -10%, the security level of the IGBT unit is determined to be middle;
step S2.5.3: if the distance between the trained long-term and short-term memory module and the actual working state of the IGBT unit is more than 10%, the safety level of the IGBT unit is judged to be low;
as a further preferable embodiment of the above technical means, step S3 is specifically implemented as the following steps:
step S3.1: if the safety level of the diagnosis result is high, the display controller performs a first level process;
step S3.2: if the safety level of the diagnosis result is middle, the display controller performs second-level processing;
step S3.3: if the safety level of the diagnosis result is low, the display controller performs a third level process.
If the safety level of the diagnosis result is high, the display controller performs a first level process, wherein the first level process is equivalent to the high safety of the actual working state of the IGBT unit, and no process or small process, such as correcting or adjusting a working voltage or current, is needed;
if the safety level of the diagnosis result is middle, the display controller performs second-level processing, wherein the second-level processing is equivalent to the safety of the actual working state of the IGBT unit, needs processing but is within the safety range, and does not need large processing;
if the safety level of the diagnosis result is low, the display controller performs a third level process, which is equivalent to a large process such as cutting off the operating power supply for inspection or replacing the IGBT unit because the safety of the actual operating state of the IGBT unit is low.
As a further preferable embodiment of the above technical means, step S4 is specifically implemented as the following steps:
step S4.1: if the safety level of the diagnosis result is high, the alarm unit carries out a first working state;
step S4.2: if the safety level of the diagnosis result is middle, the alarm unit carries out a second working state;
step S4.3: and if the safety level of the diagnosis result is low, the alarm unit performs a third working state.
If the safety level of the diagnosis result is high, the alarm unit carries out a first working state, the first working state is equivalent to the fact that the safety of the actual working state of the IGBT unit is high, and the alarm unit does not need to give an alarm;
if the safety level of the diagnosis result is middle, the alarm unit carries out a second working state, the second working state is equivalent to the general safety of the actual working state of the IGBT unit, but within the safety, the alarm unit selects yellow alarm to remind workers to carry out second-level treatment;
and if the safety level of the diagnosis result is low, the alarm unit performs a third working state, the third working state is equivalent to the situation that the safety of the actual working state of the IGBT unit is low, and the alarm unit selects red for alarming to remind a worker to perform third-level treatment.
In order to achieve the above object, the present invention further provides a safety power electronic module, including:
the IGBT unit is electrically connected with the signal acquisition unit, and the signal acquisition unit acquires voltage, current and temperature of the IGBT unit in a working state in real time to obtain a sample combination;
the intelligent diagnosis and life prediction unit receives the sample combination sent by the signal acquisition unit and processes the sample combination to form a diagnosis result;
the communication unit receives the diagnosis result sent by the intelligent diagnosis and service life prediction unit, is wirelessly connected with a display controller and carries out remote display and processing;
and the alarm unit receives the diagnosis result sent by the intelligent diagnosis and service life prediction unit and selects a working state according to the diagnosis result.
Drawings
Fig. 1 is a schematic structural diagram of a safety power electronic module and a safety detection method thereof according to the present invention.
Fig. 2 is a working flow chart of an intelligent diagnosis and life prediction unit of the safety type power electronic module and the safety detection method thereof.
The reference numerals include: 10. an IGBT unit; 20. a signal acquisition unit; 30. an intelligent diagnosis and life prediction unit; 40. a communication unit; 50. an alarm unit; 60. and displaying the controller.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
Referring to fig. 1 of the drawings, fig. 1 is a schematic structural diagram of a safety power electronic module and a safety detection method thereof according to the present invention, and fig. 2 is a work flow diagram of an intelligent diagnosis and life prediction unit of the safety power electronic module and the safety detection method thereof according to the present invention.
In the preferred embodiment of the present invention, those skilled in the art should note that the IGBT unit and the display controller and the like according to the present invention can be regarded as the prior art.
Preferred embodiments.
The invention discloses a safety detection method of a safety power electronic module, which is used for the safety detection of an IGBT unit and comprises the following steps:
step S1: the IGBT unit 10 is electrically connected with the signal acquisition unit 20, and the signal acquisition unit 20 acquires the voltage, the current and the temperature of the IGBT unit 10 in the working state in real time to obtain a sample combination;
step S2: the intelligent diagnosis and life prediction unit 30 receives the sample combination sent by the signal acquisition unit 20 and processes the sample combination to form a diagnosis result;
step S3: the communication unit 40 receives the diagnosis result sent by the intelligent diagnosis and life prediction unit 30, the communication unit 40 is wirelessly connected with the display controller 60, and the display controller 60 performs remote display and processing;
step S4: the alarm unit 50 receives the diagnosis result sent by the intelligent diagnosis and life prediction unit 30 and selects the working state according to the diagnosis result.
Specifically, step S2 is implemented as the following steps:
step S2.1: the intelligent diagnosis and service life prediction unit 30 receives sample combinations of the IGBT unit 10 sent by the signal acquisition unit 20 under different working states;
step S2.2: the intelligent diagnosis and life prediction unit 30 clusters the sample combinations to form new sample combinations;
step S2.3: preprocessing the new sample combination;
step S2.4: training the preprocessed sample combination to form a long-term and short-term memory model;
step S2.5: and judging the safety level of the actual working state of the IGBT unit according to the trained long-term and short-term memory module to form a diagnosis result.
More specifically, step S2.5 is embodied as the following steps:
step S2.5.1: if the distance between the trained long and short term memory module and the actual working state of the IGBT unit is 0-5%, the safety level of the IGBT unit is judged to be high;
step S2.5.2: if the up-down floating distance between the trained long-term and short-term memory module and the actual working state of the IGBT unit is 5% -10%, the security level of the IGBT unit is determined to be middle;
step S2.5.3: and if the distance between the trained long-term and short-term memory module and the actual working state of the IGBT unit is more than 10%, judging that the safety level of the IGBT unit is low.
Further, step S3 is specifically implemented as the following steps:
step S3.1: if the safety level of the diagnosis result is high, the display controller 60 performs a first level process;
step S3.2: if the safety level of the diagnosis result is medium, the display controller 60 performs a second level process;
step S3.3: if the safety level of the diagnosis result is low, the display controller 60 performs the third level process.
If the safety level of the diagnosis result is high, the display controller 60 performs a first level process, which corresponds to a high safety of the actual operating state of the IGBT cell 10, and may not use a process or a small process, such as correcting or adjusting an operating voltage or current, or the like;
if the safety level of the diagnosis result is middle, the display controller 60 performs a second level process, which is equivalent to the safety of the actual operating state of the IGBT unit 10, and which requires processing but is still within the safety range and does not require large processing;
if the safety level of the diagnosis result is low, the display controller 60 performs a third level process, which corresponds to a large process such as cutting off the operating power supply for inspection or replacement, because the safety of the actual operating state of the IGBT unit 10 is low.
Further, step S4 is implemented as the following steps:
step S4.1: if the safety level of the diagnosis result is high, the alarm unit 50 performs a first operation state;
step S4.2: if the safety level of the diagnosis result is middle, the alarm unit 50 performs a second working state;
step S4.3: if the safety level of the diagnosis result is low, the alarm unit 50 performs a third operation state.
If the safety level of the diagnosis result is high, the alarm unit 50 performs a first working state, the first working state is equivalent to the fact that the safety of the actual working state of the IGBT unit 10 is high, and the alarm unit does not need to give an alarm;
if the safety level of the diagnosis result is middle, the alarm unit 50 performs a second working state, the second working state is equivalent to the general safety of the actual working state of the IGBT unit 10, but within the safety, the alarm unit selects yellow alarm to remind the staff of performing second-level treatment;
if the safety level of the diagnosis result is low, the alarm unit 50 performs a third working state, which is equivalent to that the safety of the actual working state of the IGBT unit 10 is very low, and the alarm unit 50 selects red to alarm to remind the worker to perform third-level processing.
The invention also discloses a safety power electronic module, which comprises:
the IGBT device comprises an IGBT unit 10 and a signal acquisition unit 20, wherein the IGBT unit 10 is electrically connected with the signal acquisition unit 20, and the signal acquisition unit 20 acquires voltage, current and temperature of the IGBT unit 10 in a working state in real time to obtain a sample combination;
a smart diagnosis and life prediction unit 30, wherein the smart diagnosis and life prediction unit 30 receives the sample combination sent by the signal acquisition unit 20 and processes the sample combination to form a diagnosis result;
a communication unit 40, wherein the communication unit 40 receives the diagnosis result sent by the intelligent diagnosis and life prediction unit 30, the communication unit 40 is wirelessly connected with a display controller 60, and the display controller 60 performs remote display and processing;
and the alarm unit 50 receives the diagnosis result sent by the intelligent diagnosis and service life prediction unit 30 and selects a working state according to the diagnosis result.
It should be noted that the technical features of the IGBT unit, the display controller, and the like according to the present invention patent application should be regarded as the prior art, and the specific structure, the operation principle, the control mode and the spatial arrangement mode of the technical features may be selected conventionally in the field, and should not be regarded as the invention point of the present invention patent, and the present invention patent is not further specifically described in detail.
It will be apparent to those skilled in the art that modifications and equivalents may be made in the embodiments and/or portions thereof without departing from the spirit and scope of the present invention.
Claims (6)
1. A safety detection method of a safety type power electronic module is used for safety detection of an IGBT unit and is characterized by comprising the following steps:
step S1: the IGBT unit is electrically connected with the signal acquisition unit, and the signal acquisition unit acquires voltage, current and temperature of the IGBT unit in a working state in real time to obtain a sample combination;
step S2: the intelligent diagnosis and life prediction unit receives the sample combination sent by the signal acquisition unit and processes the sample combination to form a diagnosis result;
step S3: the communication unit receives the diagnosis result sent by the intelligent diagnosis and service life prediction unit, is wirelessly connected with the display controller and is used for remotely displaying and processing;
step S4: and the alarm unit receives the diagnosis result sent by the intelligent diagnosis and service life prediction unit and selects a working state according to the diagnosis result.
2. The safety detection method of the safety type power electronic module according to claim 1, wherein the step S2 is implemented as the following steps:
step S2.1: the intelligent diagnosis and service life prediction unit receives sample combinations of the IGBT units sent by the signal acquisition unit under different working states;
step S2.2: the intelligent diagnosis and life prediction unit clusters the sample combination to form a new sample combination;
step S2.3: preprocessing the new sample combination;
step S2.4: training the preprocessed sample combination to form a long-term and short-term memory model;
step S2.5: and judging the safety level of the actual working state of the IGBT unit according to the trained long-term and short-term memory module to form a diagnosis result.
3. The safety detection method of the safety type power electronic module according to claim 2, wherein the step S2.5 is implemented as the following steps:
step S2.5.1: if the distance between the trained long and short term memory module and the actual working state of the IGBT unit is 0-5%, the safety level of the IGBT unit is judged to be high;
step S2.5.2: if the up-down floating distance between the trained long-term and short-term memory module and the actual working state of the IGBT unit is 5% -10%, the security level of the IGBT unit is determined to be middle;
step S2.5.3: and if the distance between the trained long-term and short-term memory module and the actual working state of the IGBT unit is more than 10%, judging that the safety level of the IGBT unit is low.
4. The safety detection method of the safety type power electronic module according to claim 3, wherein the step S3 is implemented as the following steps:
step S3.1: if the safety level of the diagnosis result is high, the display controller performs a first level process;
step S3.2: if the safety level of the diagnosis result is middle, the display controller performs second-level processing;
step S3.3: if the safety level of the diagnosis result is low, the display controller performs a third level process.
5. The safety detection method for the safety type power electronic module according to any one of claims 3 or 4, wherein the step S4 is implemented by the following steps:
step S4.1: if the safety level of the diagnosis result is high, the alarm unit carries out a first working state;
step S4.2: if the safety level of the diagnosis result is middle, the alarm unit carries out a second working state;
step S4.3: and if the safety level of the diagnosis result is low, the alarm unit performs a third working state.
6. A safety power electronic module, comprising:
the IGBT unit is electrically connected with the signal acquisition unit, and the signal acquisition unit acquires voltage, current and temperature of the IGBT unit in a working state in real time to obtain a sample combination;
the intelligent diagnosis and life prediction unit receives the sample combination sent by the signal acquisition unit and processes the sample combination to form a diagnosis result;
the communication unit receives the diagnosis result sent by the intelligent diagnosis and service life prediction unit, is wirelessly connected with a display controller and carries out remote display and processing;
and the alarm unit receives the diagnosis result sent by the intelligent diagnosis and service life prediction unit and selects a working state according to the diagnosis result.
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