CN215871094U - New energy automobile driving motor device with increased redundant over-temperature protection - Google Patents
New energy automobile driving motor device with increased redundant over-temperature protection Download PDFInfo
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- CN215871094U CN215871094U CN202120650573.4U CN202120650573U CN215871094U CN 215871094 U CN215871094 U CN 215871094U CN 202120650573 U CN202120650573 U CN 202120650573U CN 215871094 U CN215871094 U CN 215871094U
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Abstract
The utility model relates to a new energy automobile driving motor device with increased redundant over-temperature protection, which comprises a driving motor, a first temperature sensor, a second temperature sensor, a third temperature sensor, an over-temperature protection module and a temperature model, wherein the driving motor comprises a stator winding; the first temperature sensor, the second temperature sensor and the third temperature sensor are all connected with the over-temperature protection module, and when the temperature of the stator winding is too high, the over-temperature protection module is used for reducing power output until the temperature of the stator winding is lower than a certain threshold value; the temperature model is connected with the over-temperature protection module, and the temperature model is started to work when the over-temperature protection module stops working. By adding a temperature model and a temperature sensor dual redundant protection mode, the over-temperature protection function can still be realized under the condition that two temperature sensors have faults.
Description
Technical Field
The utility model relates to the technical field of new energy automobiles, in particular to a new energy automobile driving motor device with added redundant over-temperature protection.
Background
In a new energy automobile, a driving motor system has an over-temperature protection function, and the function is to ensure that the driving motor and a motor controller cannot cause damage to devices or reduce the service life of the devices due to over-high temperature. When the monitored temperature is higher than the set threshold value, the driving motor system enters a corresponding over-temperature protection mode, the derating limit torque is visually expressed, the shutdown pipe is stopped when the derating limit torque is serious, and the power-off recovery is carried out. In order to monitor the temperature of the driving motor, a temperature sensor needs to be installed near a stator winding, when the temperature sensor fails due to self or external factors, the over-temperature protection function of the driving motor system cannot be realized, and the high risk can not be brought due to the fact that the temperature sensor cannot be controlled to be properly high.
Disclosure of Invention
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the utility model provides a new energy automobile driving motor device with added redundant over-temperature protection, which ensures that the over-temperature protection function can still be realized under the condition of failure of two temperature sensors by adding a dual redundant protection mode of the temperature sensors and a temperature model.
The technical problem is solved.
(II) technical scheme
In order to achieve the purpose, the utility model adopts the main technical scheme that:
the embodiment of the utility model provides a new energy automobile driving motor device with added redundant over-temperature protection, which comprises a driving motor, a first temperature sensor, a second temperature sensor, a third temperature sensor, an over-temperature protection module and a temperature model,
the driving motor comprises a stator winding, and the first temperature sensor, the second temperature sensor and the third temperature sensor are arranged on the stator winding and used for monitoring the temperature of the stator winding;
the first temperature sensor, the second temperature sensor and the third temperature sensor are all connected with the over-temperature protection module, and when the temperature of the stator winding is too high, the over-temperature protection module is used for monitoring and reducing power output until the temperature of the stator winding is lower than a certain threshold value;
the temperature model is connected with the over-temperature protection module, and the temperature model is started to work when the over-temperature protection module stops working.
Optionally, the temperature model can calibrate a relationship curve of temperature, current and time through actual tests of the first temperature sensor, the second temperature sensor and the third temperature sensor, and control the whole device according to the relationship curve to reduce power output until the temperature of the stator winding is lower than a certain threshold value.
Optionally, the first temperature sensor, the second temperature sensor and the third temperature sensor are always kept to work in a normal matching manner with the over-temperature protection module, and the temperature model is started to work when faults occur.
Optionally, a motor controller is included that reduces the drive motor power output when the temperature is too high for a predetermined threshold.
(III) advantageous effects
The utility model has the beneficial effects that: according to the new energy automobile driving motor device with the added redundant over-temperature protection, the over-temperature protection function can still be realized under the condition that two temperature sensors have faults by adding a temperature model and a temperature sensor dual redundant protection mode, and a driving motor system and the whole automobile can normally run without replacing hardware.
The utility model can reduce the failure rate of the temperature sensor of the electric drive system and reduce the after-sale maintenance cost. Through dual redundant protection, the failure rate of the over-temperature protection function of the driving motor system can be greatly reduced. And under the condition of not increasing the cost, the function safety level is improved.
Drawings
FIG. 1 is a schematic diagram of a driving motor device module of a new energy automobile with redundant over-temperature protection added according to the present invention;
FIG. 2 is a schematic diagram of a motor phase current versus operating time curve;
[ description of reference ]
1: a first temperature sensor;
2: a second temperature sensor;
3: a third temperature sensor;
4: an over-temperature protection module;
5: a temperature model;
6: and a stator winding.
Detailed Description
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
Example (b): referring to fig. 1, an embodiment of the present invention provides a new energy automobile driving motor apparatus with increased redundant over-temperature protection, including a driving motor, a first temperature sensor 1, a second temperature sensor 2, a third temperature sensor 3, an over-temperature protection module 4, and a temperature model 5,
the driving motor comprises a stator winding 6, and a first temperature sensor 1, a second temperature sensor 2 and a third temperature sensor 3 are arranged on the stator winding 6 and used for monitoring the temperature of the stator winding 6.
The first temperature sensor 1, the second temperature sensor 2 and the third temperature sensor 3 are all connected with the over-temperature protection module 4, and when the temperature of the stator winding 6 is too high, the over-temperature protection module 4 is used for monitoring and reducing power output until the temperature of the stator winding 6 is lower than a certain threshold value;
the temperature model 5 is connected with the over-temperature protection module 4, and the temperature model 5 is started to work when the over-temperature protection module 4 stops working.
Referring to fig. 2, the temperature model 5 can calibrate a relationship curve of temperature, current and time through actual tests of the first temperature sensor 1, the second temperature sensor 2 and the third temperature sensor 3, and control the whole device according to the relationship curve, so as to reduce power output until the temperature of the stator winding 6 is lower than a certain threshold value.
The first temperature sensor 1, the second temperature sensor 2 and the third temperature sensor 3 are always kept to be normally matched with the over-temperature protection module 4 to work, and the temperature model 5 is started to work when faults occur.
The working principle of the utility model is as follows:
a) the hardware for monitoring the temperature of the stator winding 6 is a temperature sensor, 3 motors are arranged, the corresponding winding temperature is analyzed through simulating a relation curve of current and time, a virtual value is obtained, and a temperature model 5 is formed.
b) One of the three temperature sensors (which is not damaged) works, the temperature value fed back determines the temperature of the motor winding, and then an over-temperature protection strategy is entered;
c) when one temperature sensor is damaged, the temperature value detected by 1 of the other two temperature sensors (which are not damaged) is selected to judge the temperature of the motor stator winding 6, and then an over-temperature protection strategy is entered;
d) when two temperature sensors are damaged, the temperature value detected by the last 1 temperature sensor (undamaged) is used for judging the temperature of the motor stator winding 6, and then an over-temperature protection strategy is entered;
e) when all 3 temperature sensors are damaged, the temperature of the motor winding is judged according to the temperature value simulated by the temperature model, and then an over-temperature protection strategy is entered.
Further, the over-temperature protection strategy is to reduce the power output until the stator winding 6 temperature is below a certain threshold.
It should be noted that: the utility model relates to a temperature sensor I1, a temperature sensor II 2, a temperature sensor III 3, an over-temperature protection module 4, a temperature model 5 and a stator winding 6 which are all in the prior art. The temperature sensor of a general driving motor is arranged on a stator winding 6, a temperature signal is transmitted to a motor controller through a rotary transformer wiring harness (low voltage), and when the temperature value of the motor winding received by the motor controller is larger than a set threshold value (generally set at 120-.
In summary, according to the new energy automobile driving motor device with the redundant over-temperature protection, the temperature model 5, the temperature sensor I1, the temperature sensor II 2 and the temperature sensor III 3 are added for dual redundant protection, so that the over-temperature protection function can still be realized under the condition that two temperature sensors are in fault, and the driving motor system and the whole automobile can normally run without replacing hardware.
The utility model can reduce the failure rate of the temperature sensor of the electric drive system and reduce the after-sale maintenance cost. Through dual redundant protection, the failure rate of the over-temperature protection function of the driving motor system can be greatly reduced. And under the condition of not increasing the cost, the function safety level is improved.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.
In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.
Claims (4)
1. A new energy automobile driving motor device added with redundant over-temperature protection comprises a driving motor, a first temperature sensor (1), a second temperature sensor (2), a third temperature sensor (3), an over-temperature protection module (4) and a temperature model (5),
the driving motor comprises a stator winding (6), and the temperature sensor I (1), the temperature sensor II (2) and the temperature sensor III (3) are arranged on the stator winding (6) and used for monitoring the temperature of the stator winding (6);
the temperature sensor I (1), the temperature sensor II (2) and the temperature sensor III (3) are all connected with the over-temperature protection module (4), and when the temperature of the stator winding (6) is too high, the over-temperature protection module (4) monitors and reduces power output until the temperature of the stator winding (6) is lower than a certain threshold value;
the temperature model (5) is connected with the over-temperature protection module (4), and the temperature model (5) is started to work when the over-temperature protection module (4) stops working.
2. The new energy automobile driving motor device added with the redundant over-temperature protection is characterized in that,
the temperature model (5) can calibrate a relation curve of temperature, current and time through actual tests of the first temperature sensor (1), the second temperature sensor (2) and the third temperature sensor (3), and controls the whole device according to the curve to reduce power output until the temperature of the stator winding (6) is lower than a certain threshold value.
3. The new energy automobile driving motor device added with the redundant over-temperature protection is characterized in that,
the temperature sensor I (1), the temperature sensor II (2) and the temperature sensor III (3) are always kept to work in normal matching with the over-temperature protection module (4), and the temperature model (5) is started to work when all the temperature sensors break down.
4. The new energy automobile driving motor device added with the redundant over-temperature protection is characterized in that,
the motor controller is also included, and when the temperature is over a determined threshold, the motor controller reduces the power output of the drive motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120650573.4U CN215871094U (en) | 2021-03-31 | 2021-03-31 | New energy automobile driving motor device with increased redundant over-temperature protection |
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| CN202120650573.4U CN215871094U (en) | 2021-03-31 | 2021-03-31 | New energy automobile driving motor device with increased redundant over-temperature protection |
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| CN215871094U true CN215871094U (en) | 2022-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117424523A (en) * | 2023-11-02 | 2024-01-19 | 格陆博科技有限公司 | Motor driver hot start temperature estimation system and method thereof |
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2021
- 2021-03-31 CN CN202120650573.4U patent/CN215871094U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117424523A (en) * | 2023-11-02 | 2024-01-19 | 格陆博科技有限公司 | Motor driver hot start temperature estimation system and method thereof |
| CN117424523B (en) * | 2023-11-02 | 2024-04-09 | 格陆博科技有限公司 | Motor driver hot start temperature estimation system and method thereof |
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