CN113219269A - Electromagnetic compatibility testing system and method for high-voltage PTC heating system of electric vehicle - Google Patents
Electromagnetic compatibility testing system and method for high-voltage PTC heating system of electric vehicle Download PDFInfo
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- CN113219269A CN113219269A CN202110337601.1A CN202110337601A CN113219269A CN 113219269 A CN113219269 A CN 113219269A CN 202110337601 A CN202110337601 A CN 202110337601A CN 113219269 A CN113219269 A CN 113219269A
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- heater assembly
- ptc heater
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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
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses an electromagnetic compatibility testing system and method for a high-voltage PTC heating system of an electric vehicle, belonging to the technical field of electric vehicle heaters. The cooling fan can adjust the heat dissipation strength according to the PTC heating quantity, the horn air outlet is designed, the cooling area is wide, the effect is good, the electromagnetic interference cannot be brought into testing places such as a darkroom and the like, the background noise requirement of the EMI test can be met, the application range of the testing method is wide, the cooling system is suitable for most electromagnetic compatibility testing projects, the cost of the cooling system is low, and the cooling system is safer and more stable than a water cooling system and has strong operability.
Description
Technical Field
The invention discloses an electromagnetic compatibility testing system and method for a high-voltage PTC heating system of an electric vehicle, and belongs to the technical field of electric vehicle heaters.
Background
With the rapid increase of fuel vehicles, the pollution degree of global atmospheric environment is more severe, and the new energy vehicles will undoubtedly become the development direction of future vehicles due to the pressure of global energy. China also needs to deeply implement national strategies for developing new energy automobiles, promote high-quality sustainable development of the new energy automobile industry in China, and accelerate the construction of automobiles in strong countries. The PTC heating system is used as a necessary system on a new energy vehicle, the electromagnetic compatibility requirement is quite high, firstly, the system must ensure that the normal operation of other parts on the vehicle is not influenced in the normal operation process, and the PTC heating system is required to have good electromagnetic disturbance capacity; secondly, it also receives various electromagnetic interferences of other parts on the vehicle at any time, which makes it have very excellent electromagnetic interference resistance. Therefore, the electromagnetic compatibility testing method for the high-voltage PTC heating system of the electric vehicle is developed, the electromagnetic compatibility testing method not only needs to meet the EMC testing requirements of various large domestic and foreign standards, but also ensures the safety and stability of the testing period, and the PTC heater can generate a large amount of heat energy during the testing period, so that a good cooling system needs to be ensured for cooling the electric vehicle, and the electric vehicle is ensured to be in a normal working state during the testing period.
Disclosure of Invention
The invention provides an electromagnetic compatibility testing system and method for a high-voltage PTC heating system of an electric vehicle, which mainly solve the problems of poor heat dissipation effect, narrow application range and high cost of the traditional testing system.
The invention aims to solve the problems and is realized by the following technical scheme:
the utility model provides an electric motor car high pressure PTC heating system electromagnetic compatibility test system, including arranging PTC heater assembly and the battery in the darkroom and arranging high voltage power supply, host computer, controller and the low voltage power supply outside the darkroom, PTC heater assembly and battery electric connection, high voltage power supply and host computer respectively with PTC heater assembly electric connection, low voltage power supply and battery electric connection, the control machine acquires the test data of PTC heater assembly through arranging the antenna in the darkroom.
Preferably, a low voltage artificial network is also included, provided in the wiring connecting between the PTC heater assembly and the battery.
Preferably, the air cylinder is arranged in the dark room and is connected with a cooling fan which is arranged beside the PTC heater assembly in the dark room through an air pipe.
Preferably, the PTC heater assembly further comprises a high voltage artificial network disposed within the dark room and provided on the line connecting between the PTC heater assembly and a high voltage power supply.
Preferably, the PTC heater assembly further comprises an internal LIN light relay disposed within the dark room and disposed on wiring connected between the PTC heater assembly and an upper computer.
Preferably, the system further comprises an outer LIN optical switch arranged outside the darkroom and arranged on a line connected between the inner LIN optical switch and the upper computer.
Preferably, the system further comprises a communication box arranged outside the darkroom and arranged on a line connected between the outer LIN optical switch and the upper computer.
An electromagnetic compatibility testing method for a high-voltage PTC heating system of an electric vehicle comprises the following steps:
step S1, starting the cylinder, starting and outputting the high-voltage power supply and the low-voltage power supply, and monitoring the interface of the upper computer to ensure the normal work of the PTC heater assembly;
and step S2, the control machine completes the working state data of the PTC heater assembly in the relevant frequency band by replacing the receiving frequency of the detection antenna.
Preferably, when the control machine is a spectrum receiver, the operating state data of the PTC heater assembly is the electromagnetic emission value of the PTC heater assembly, and when the electromagnetic emission value of the PTC heater assembly is lower than the design limit requirement, the electromagnetic emission test of the PTC heater assembly is qualified.
Preferably, when the control machine is a signal source and a power amplifier, the operating state data of the PTC heater assembly is an electromagnetic disturbance rejection emission value of the PTC heater assembly, and when the electromagnetic disturbance rejection emission value of the PTC heater assembly is lower than a design limit requirement, the electromagnetic disturbance rejection test of the PTC heater assembly is qualified.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides an electromagnetic compatibility test system and method for a high-voltage PTC heating system of an electric vehicle, which can adjust the heat dissipation strength according to the PTC heating quantity through an arranged cooling fan, design a horn air outlet, have wide cooling area and good effect, can not bring electromagnetic interference into test places such as a darkroom and the like, can meet the requirement of EMI test background noise, have wide application range of the test method, are suitable for most electromagnetic compatibility test items, have low cost of the cooling system, are safer and more stable than a water cooling system, and have strong operability.
Drawings
Fig. 1 is a frame diagram of an electromagnetic compatibility testing system of a high-voltage PTC heating system of an electric vehicle according to the present invention.
Detailed Description
The invention is further illustrated below with reference to the accompanying drawing 1:
the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically connected or connected; they may be connected directly or indirectly through intervening media, or they may be connected internally or indirectly between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those of ordinary skill in the art.
As shown in fig. 1, a first embodiment of the present invention provides an electromagnetic compatibility testing system for a high-voltage PTC heating system of an electric vehicle based on the prior art, which includes: the low-voltage power supply device comprises a darkroom, a PTC heater assembly, a battery, a high-voltage power supply, an upper computer, a control machine, a low-voltage artificial network, a cylinder, a high-voltage artificial network, an inner LIN optical switch, an outer LIN optical switch, a communication box and a low-voltage power supply, wherein the connection relationship of the components is described in detail below.
The PTC heater assembly and the battery are arranged in the darkroom, the PTC heater assembly is represented by PTC in the attached drawing, the high-voltage power supply, the upper computer, the control machine and the low-voltage power supply are arranged outside the darkroom, the PTC heater assembly is electrically connected with the battery, the low-voltage artificial network is arranged on a circuit connected between the PTC heater assembly and the battery, and the low-voltage power supply is electrically connected with the battery. The high-voltage power supply and the upper computer are respectively electrically connected with the PTC heater assembly, and the high-voltage artificial network is arranged on a line connected between the PTC heater assembly and the high-voltage power supply. The inner LIN optical switch is arranged in the darkroom, the outer LIN optical switch and the communication box are arranged outside the darkroom, and the inner LIN optical switch, the outer LIN optical switch and the communication box are sequentially connected and arranged on a circuit connected between the PTC heater assembly and the upper computer. The control machine acquires test data of the PTC heater assembly through an antenna arranged in the darkroom. And the air cylinder is arranged in the darkroom and is connected with a cooling fan arranged beside the PTC heater assembly in the darkroom through an air pipe.
The upper computer simulates the working condition of an actual vehicle through software to send an LIN signal, sends a power signal to the PTC heater assembly in the form of the LIN signal, and a control board in the PTC heater receives the LIN signal and outputs the power required by the gear by processing and adjusting the conduction time of an IGBT in the control board.
The host computer can also receive the temperature signal of the temperature sensor near the heating core body, and when the temperature is higher than the limit value requirement, the power of the PTC heater assembly can be reduced. The power down strategy is exemplified as follows:
1. when the core temperature Tptc is less than or equal to 100 ℃, requesting normal response of power;
2. when the temperature is more than 100 ℃ and the Tptc is less than or equal to 105 ℃, the current actual power is kept unchanged, and only an instruction for reducing the requested power is responded;
3. when the Tptc is more than 105 ℃, the core temperature is reduced by 10 percent according to the current running power reference every time the core temperature is increased by 1 ℃, and only a command for reducing the requested power is responded; when the temperature of the core body reaches 116 ℃, the power is reduced to 0;
4. when the Tptc is more than 140 ℃, reporting the fault, and <135 ℃, and recovering the fault.
After the PTC heater assembly is normally started in a working mode, the air cylinder starts to work, air pressure is manually adjusted to be output to the cooling fan assembly of the darkroom, and the pressure adjusting valve is arranged on the cooling fan assembly and can adjust the air pressure according to the heat productivity of the PTC heater assembly, so that the cooling strength of the PTC heater assembly is ensured, and cooling resources are not excessively wasted. At the moment, the monitoring upper computer interface LIN communication interface displays normally, returns normal signals of voltage, current, power, temperature and the like, and can normally receive and execute the power requirement on the LIN line.
An electromagnetic compatibility testing method for a high-voltage PTC heating system of an electric vehicle comprises the following steps:
step S1, starting the cylinder, starting and outputting the high-voltage power supply and the low-voltage power supply, and monitoring the interface of the upper computer to ensure the normal work of the PTC heater assembly;
and step S2, the control machine completes the working state data of the PTC heater assembly in the relevant frequency band by replacing the receiving frequency of the detection antenna.
And when the control machine is a frequency spectrum receiver, performing an electromagnetic radiation emission disturbance test within a frequency band of 0.15-2500 MHz, wherein the working state data of the PTC heater assembly is the electromagnetic emission value of the PTC heater assembly, and when the electromagnetic emission value of the PTC heater assembly is lower than the design limit value requirement, the electromagnetic emission test of the PTC heater assembly is qualified.
In the second embodiment, when the control machine is a signal source and a power amplifier, the electromagnetic radiation immunity test within the frequency band of 80-3200 MHz is carried out. The radiation immunity test has relatively simple antenna types, only comprises two conditions of a logarithmic antenna (less than 1000MHz) and a horn antenna (more than 1000MHz), and the antennas respectively face the middle position of a test wiring harness and face a PTC heater assembly. The working state data of the PTC heater assembly is the electromagnetic anti-interference emission value of the PTC heater assembly, and when the electromagnetic anti-interference emission value of the PTC heater assembly is lower than the design limit value requirement, the electromagnetic anti-interference test of the PTC heater assembly is qualified.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides an electric motor car high pressure PTC heating system electromagnetic compatibility test system which characterized in that, including arranging PTC heater assembly and the battery in the darkroom and arranging high voltage power supply, host computer, controller and the low voltage power supply outside the darkroom, PTC heater assembly and battery electric connection, high voltage power supply and host computer respectively with PTC heater assembly electric connection, low voltage power supply and battery electric connection, the controller acquires the test data of PTC heater assembly through arranging the antenna in the darkroom.
2. A system for testing electromagnetic compatibility of a high voltage PTC heating system for electric vehicles according to claim 1, further comprising a low voltage artificial network disposed on a line connecting between the PTC heater assembly and the battery.
3. An electromagnetic compatibility testing system for a high-voltage PTC heating system of an electric vehicle as claimed in claim 1 or 2, further comprising a cylinder disposed in said dark room and connected to a cooling fan disposed beside the PTC heater assembly in the dark room through an air pipe.
4. An electromagnetic compatibility testing system for a high voltage PTC heating system of an electric vehicle according to claim 3, further comprising a high voltage artificial network disposed within said dark room and disposed on a line connecting between said PTC heater assembly and a high voltage power supply.
5. An electromagnetic compatibility testing system for a high voltage PTC heating system of an electric vehicle as claimed in claim 4, further comprising an inner LIN optical switch disposed in said dark room and disposed on a line connecting between said PTC heater assembly and an upper computer.
6. A high-voltage PTC heating system electromagnetic compatibility test system for electric vehicle according to claim 4 or 5, further comprising an outer LIN optical switch arranged outside said darkroom and arranged on a line connected between said inner LIN optical switch and an upper computer.
7. An electromagnetic compatibility testing system for a high-voltage PTC heating system of an electric vehicle as claimed in claim 6, further comprising a communication box disposed outside said darkroom and disposed on a line connected between said outer LIN light relay and an upper computer.
8. An electromagnetic compatibility testing method for a high-voltage PTC heating system of an electric vehicle is characterized by comprising the following steps:
step S1, starting the cylinder, starting and outputting the high-voltage power supply and the low-voltage power supply, and monitoring the interface of the upper computer to ensure the normal work of the PTC heater assembly;
and step S2, the control machine completes the working state data of the PTC heater assembly in the relevant frequency band by replacing the receiving frequency of the detection antenna.
9. The method as claimed in claim 8, wherein when the control machine is a spectrum receiver, the operating status data of the PTC heater assembly is the electromagnetic emission value of the PTC heater assembly, and when the electromagnetic emission value of the PTC heater assembly is lower than the design limit requirement, the electromagnetic emission test of the PTC heater assembly is qualified.
10. The method as claimed in claim 8, wherein when the control machine is a signal source and a power amplifier, the operating status data of the PTC heater assembly is the electromagnetic immunity emission value of the PTC heater assembly, and when the electromagnetic immunity emission value of the PTC heater assembly is lower than the design limit, the electromagnetic immunity test of the PTC heater assembly is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337601.1A CN113219269A (en) | 2021-03-30 | 2021-03-30 | Electromagnetic compatibility testing system and method for high-voltage PTC heating system of electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110337601.1A CN113219269A (en) | 2021-03-30 | 2021-03-30 | Electromagnetic compatibility testing system and method for high-voltage PTC heating system of electric vehicle |
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| CN113219269A true CN113219269A (en) | 2021-08-06 |
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| CN202110337601.1A Pending CN113219269A (en) | 2021-03-30 | 2021-03-30 | Electromagnetic compatibility testing system and method for high-voltage PTC heating system of electric vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184871A (en) * | 2021-12-18 | 2022-03-15 | 北京亿华通科技股份有限公司 | EMC performance test system and test method of fuel cell heat dissipation system |
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2021
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Cited By (2)
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| CN114184871A (en) * | 2021-12-18 | 2022-03-15 | 北京亿华通科技股份有限公司 | EMC performance test system and test method of fuel cell heat dissipation system |
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Application publication date: 20210806 |