CN113320398A - Method, module and system for protecting driving motor under finished automobile flameout condition - Google Patents
Method, module and system for protecting driving motor under finished automobile flameout condition Download PDFInfo
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- CN113320398A CN113320398A CN202110702402.6A CN202110702402A CN113320398A CN 113320398 A CN113320398 A CN 113320398A CN 202110702402 A CN202110702402 A CN 202110702402A CN 113320398 A CN113320398 A CN 113320398A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0084—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to control modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/421—Speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention discloses a method for protecting a driving motor under the flameout working condition of a whole vehicle, which comprises the following steps: detecting an ignition signal of the whole vehicle in real time; if the preset excitation signal is detected, intermittently supplying power to the state detection module through the vehicle body controller at a preset frequency and acquiring the state of the motor; and executing motor protection according to the motor state. The invention also discloses a whole vehicle flameout working condition driving state detection module and a whole vehicle flameout working condition driving motor protection system. The invention can ensure the detection of the motor state by the flameout state of the whole vehicle, can also avoid the power shortage of the low-voltage power supply caused by excessive electric appliances, effectively discriminates the unconventional working condition of the driving motor through a protection strategy and sends an alarm to the outside in time in the flameout state of the whole vehicle, can effectively avoid the damage of a motor system caused by improper operation during towing, and improves the safety of a new energy vehicle.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a method for protecting a whole-automobile flameout condition driving motor of a new energy automobile, a whole-automobile flameout condition driving state detection module and a whole-automobile flameout condition driving motor protection system.
Background
The new energy automobile industry is rapidly developed, and electric automobiles play an increasingly important role in daily life of people. The driving motor system is called as the heart of the electric automobile, and the electric energy is converted into the mechanical energy to drive the automobile to run by means of the accurate regulation and control of the motor controller, so that the driving motor system is the only power device of the pure electric automobile. Compared with other types of motors, the permanent magnet synchronous motor has the characteristics of small volume, high power density, high reliability, high response speed and the like, is used in new energy automobiles in China by more than 90 percent at present, and becomes the mainstream of the current electric drive market.
Electric vehicles are also exposed to more and more problems in the process of rapid development. Compared with a fuel vehicle, the transmission system of the electric vehicle is greatly simplified, and the failure rate is reduced; at the same time, however, problems and malfunctions that are characteristic of some electric vehicles also occur. Under the general condition, after the car can't continue to travel because the trouble leads to, the driver can place the vehicle in neutral gear back and stop fire, is in the trailer operating mode by the trailer with trouble vehicle pull-off scene, trouble vehicle this moment, and each control system of whole car is out of work. Different from a fuel vehicle, an electric vehicle generally adopts a mode that a driving motor and a speed reducer are directly connected with a transmission shaft, and a transmission system of the electric vehicle is not separated after a driver is in neutral gear. For an electric automobile adopting a permanent magnet synchronous motor as a driving scheme, when the electric automobile is in a trailer working condition, a motor rotor continuously cuts magnetic induction lines along with the rotation of wheels, induced electromotive force, namely, so-called back electromotive force is generated in a motor stator, and the faster the automobile speed is, the higher the back electromotive force measured by a three-phase terminal of the motor stator is. At this moment, the whole vehicle is in a flameout power-off state, the motor controller does not work, so that the counter potential of the motor directly acts on a power element of the motor controller, and the possibly caused harmful results comprise:
1. as shown in fig. 1, when the controller is in the FreeWheeling state, the motor controller power module switches IGBT are all turned off, and the induced electromotive force (sinusoidal alternating voltage) generated in the motor stator will make the dc side capacitor and IGBT in the controller in a high-voltage state, so that the controller is at risk of being broken down by high voltage. 2. As shown in fig. 2, when the controller is in the ASC state, the upper three-bridge of the power module switch IGBT of the motor controller is in the off state, the lower three-bridge is closed, the motor controller continuously and passively discharges, and heat generated in this process cannot be dissipated (the entire vehicle is powered off and the cooling system does not work) to cause thermal damage to the controller components.
Disclosure of Invention
In this summary, a series of simplified form concepts are introduced that are simplifications of the prior art in this field, which will be described in further detail in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The invention aims to provide a method for protecting a driving motor under the flameout working condition of a whole vehicle.
The invention provides a driving state detection module for flameout working conditions of a whole vehicle.
The invention provides a driving motor protection system under the flameout condition of a whole vehicle.
In order to solve the technical problem, the invention provides a method for protecting a driving motor under the flameout working condition of a whole vehicle, which comprises the following steps:
s1, detecting the ignition signal of the whole vehicle in real time;
s2, if a preset excitation signal is detected, intermittently supplying power to the state detection module through the vehicle body controller at a preset frequency and collecting the state of the motor;
and S3, executing motor protection according to the motor state.
Optionally, the method for protecting the driving motor under the flameout condition of the whole vehicle is further improved, and the preset excitation signal is a negative excitation signal generated by converting a whole vehicle ignition signal from a high level to a low level.
Optionally, the method for protecting the driving motor under the flameout condition of the whole vehicle is further improved, and the motor state includes: ignition signal voltage and motor speed, and the duration of time that the motor operates at the ignition signal voltage and motor speed.
Optionally, the method for protecting the driving motor under the flameout condition of the whole vehicle is further improved, and the motor protection comprises the following steps:
A. the ignition signal voltage V ranges: v is not less than V2 and not more than V1, and no protection operation is performed;
B. the ignition signal voltage V ranges: v is less than V1, the rotating speed of the motor is 0, and the protection operation is not executed;
C. the ignition signal voltage V ranges: v is less than V1, and the motor rotating speed RP range is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t is more than or equal to T1 and less than T2 minutes, and no protection operation is performed;
D. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t1 is less than or equal to T, and an alarm is output;
E. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP2 is less than or equal to RP, and an alarm is output;
wherein, V1, V2 are voltage values designated according to motor performance, T1, T2 are time lengths designated according to motor performance, and RP1, RP2 are rotating speeds designated according to motor performance.
In order to solve the technical problem, the invention provides a whole vehicle flameout condition driving state detection module, which comprises:
the output end of the logic unit is connected with the input end of the motor position sensor, and the two input ends of the logic unit are respectively connected with the ignition signal of the whole vehicle and the output end of the controllable switch;
the input end of the control unit receives the instruction of the vehicle body controller, and the output end of the control unit is connected with the control end of the controllable switch to control the on-off of the controllable switch;
and the other input end of the controllable switch is connected with the output voltage of the automobile body controller.
Optionally, the driving state detection module for the flameout condition of the whole vehicle is further improved, and the control unit receives an instruction of the vehicle body controller to enable the controllable switch to intermittently switch on and off at a preset frequency to supply power to the motor position sensor.
In order to solve the technical problem, the invention provides a system for protecting a whole vehicle flameout condition driving motor of a whole vehicle flameout condition driving state detection module, which comprises:
the motor signal acquisition module is used for acquiring a motor rotating speed signal, decoding the motor rotating speed signal and then transmitting the motor rotating speed signal to the vehicle body controller;
the state detection module is used for receiving an instruction of the vehicle body controller by a receiving end to supply power to the motor position sensor;
and the automobile body controller is used for detecting a preset excitation signal, outputting an instruction to supply power to the motor position sensor and simultaneously acquiring the motor state, and executing motor protection according to the motor state.
Optionally, the system for protecting the driving motor under the flameout condition of the whole vehicle is further improved, and the preset excitation signal is a negative excitation signal generated by converting a whole vehicle ignition signal from a high level to a low level.
Optionally, the system for protecting the driving motor under the flameout condition of the whole vehicle is further improved, and the output instruction is a preset frequency intermittent on-off instruction of the controllable switch.
Optionally, further improve whole car flameout operating mode driving motor protection system, the motor protection includes:
A. the ignition signal voltage V ranges: v is not less than V2 and not more than V1, and no protection operation is performed;
B. the ignition signal voltage V ranges: v is less than V1, the rotating speed of the motor is 0, and the protection operation is not executed;
C. the ignition signal voltage V ranges: v is less than V1, and the motor rotating speed RP range is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t is more than or equal to T1 and less than T2 minutes, and no protection operation is performed;
D. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t1 is less than or equal to T, and an alarm is output;
E. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP2 is less than or equal to RP, and an alarm is output;
wherein, V1, V2 are voltage values designated according to motor performance, T1, T2 are time lengths designated according to motor performance, and RP1, RP2 are rotating speeds designated according to motor performance.
The working principle of the invention is as follows:
when the whole vehicle normally works, the motor signal acquisition module (comprising a motor position sensor and a decoding chip) is powered by the whole vehicle ignition signal circuit KL15, and at the moment, the BCM of the vehicle body controller detects an ignition signal KL15 to judge that the whole vehicle is in a working state, and the control unit does not work.
When the whole vehicle is in a flameout state, an ignition signal KL15 is converted from a high level to a low level, the BCM detects the negative excitation generated by KL15, the control unit is activated to send intermittent pulses to the controllable switch, and meanwhile, the BCM (the BCM is powered by the vehicle-mounted storage battery) supplies power to the controllable switch; the control unit enables the controllable switch to be conducted at a fixed frequency, so that intermittent power supply to the motor signal acquisition module under the flameout state of the whole vehicle is achieved, and a motor state signal generated by the motor signal acquisition module is transmitted to the vehicle body controller BCM. Therefore, the detection of the flameout state of the whole vehicle on the state of the motor can be ensured, and the power shortage of the low-voltage power supply caused by too much electric appliance can be avoided.
According to the invention, the unconventional working condition of the driving motor can be effectively discriminated through a protection strategy under the flameout state of the whole automobile, when the BCM judges that the motor controller has failure risk, an alarm can be sent to the outside in time (for example, through a buzzer of the whole automobile), the damage of a motor system caused by improper operation during towing can be effectively avoided, and the safety of the new energy automobile is improved. It should be noted that the state detection module is integrated with the electric drive bridge hardware, and the hardware in the prior art can be completely applied to realize the function thereof, and a special module is not required to be additionally designed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification. The drawings are not necessarily to scale, however, and may not be intended to accurately reflect the precise structural or performance characteristics of any given embodiment, and should not be construed as limiting or restricting the scope of values or properties encompassed by exemplary embodiments in accordance with the invention. The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
FIG. 1 is a high pressure risk schematic of a body controller.
FIG. 2 is a schematic view of risk of thermal damage to a vehicle body controller.
FIG. 3 is a schematic structural diagram of a driving state detection module for flameout conditions of a whole vehicle.
Fig. 4 is a schematic structural diagram of a motor signal acquisition module.
FIG. 5 is a schematic structural diagram of a driving motor protection system under a flameout condition of a whole vehicle.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and technical effects of the present invention will be fully apparent to those skilled in the art from the disclosure in the specification. The invention is capable of other embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the general spirit of the invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. The following exemplary embodiments of the present invention may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the technical solutions of these exemplary embodiments to those skilled in the art.
It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Like reference numerals refer to like elements throughout the drawings. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Other words used to describe the relationship between elements or layers (e.g., "between … …" and "directly between … …", "adjacent to … …" and "directly adjacent to … …", "on … …" and "directly on … …", etc.) should be interpreted in the same manner.
A first embodiment;
the invention provides a method for protecting a driving motor under a flameout working condition of a whole vehicle, which comprises the following steps of:
s1, detecting the ignition signal of the whole vehicle in real time;
s2, if a preset excitation signal is detected, intermittently supplying power to the state detection module through the vehicle body controller at a preset frequency and collecting the state of the motor;
and S3, executing motor protection according to the motor state.
According to the first embodiment, whether the whole vehicle normally works or not is judged by detecting the ignition signal of the whole vehicle in real time. When the whole vehicle is in a flameout state, namely after an excitation signal is detected, the vehicle body controller intermittently supplies power to the state detection module at a preset frequency and collects the state of the motor, so that intermittent power supply and motor state collection of the motor under the flameout state of the whole vehicle are realized. And executing motor protection according to the collected motor state. Therefore, the detection of the flameout state of the whole vehicle on the state of the motor can be ensured, and the power shortage of the low-voltage power supply caused by too much electric appliance can be avoided. And moreover, the state of the driving motor under the unconventional working condition can be effectively discriminated through a protection strategy under the flameout state of the whole vehicle, an alarm is sent to the outside in time, the damage of a motor system caused by misoperation during towing can be effectively avoided, and the safety of the new energy vehicle is improved.
A second embodiment;
the invention provides a method for protecting a driving motor under a flameout working condition of a whole vehicle, which comprises the following steps of:
s1, detecting the ignition signal of the whole vehicle in real time;
s2, if a negative excitation signal generated by converting the ignition signal of the whole vehicle from a high level to a low level is detected, intermittently supplying power to the state detection module by using a preset frequency through the vehicle body controller and collecting the state of the motor; the motor states include: the ignition signal voltage and the motor rotating speed, and the duration of the motor working at the ignition signal voltage and the motor rotating speed;
s3, executing motor protection according to the motor state, including:
A. the ignition signal voltage V ranges: v is not less than V2 and not more than V1, and no protection operation is performed;
B. the ignition signal voltage V ranges: v is less than V1, the rotating speed of the motor is 0, and the protection operation is not executed;
C. the ignition signal voltage V ranges: v is less than V1, and the motor rotating speed RP range is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t is more than or equal to T1 and less than T2 minutes, and no protection operation is performed;
D. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t1 is less than or equal to T, and an alarm is output;
E. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP2 is less than or equal to RP, and an alarm is output;
wherein, V1, V2 are voltage values designated according to motor performance, T1, T2 are time lengths designated according to motor performance, and RP1, RP2 are rotating speeds designated according to motor performance;
the following are exemplary:
v1 is 0 < V1 < 5.9V, V1 is preferably 5.9V;
the range of V2 is 5.9V < V2 ≤ 16V, and V2 is preferably 16V;
the range of RP1 is 0rpm ≦ RP1 ≦ 1rpm, and RP1 is preferably 1 rpm;
the range of RP2 is 4000rpm ≦ RP2 ≦ 5000rpm, and RP2 is preferably 5000 rpm;
t1 is in the range of 0 min. ltoreq. T1. ltoreq.1 min, T1 is preferably 0 min;
the T2 range is 10 minutes. ltoreq. T1. ltoreq.15 minutes, T2 is preferably 15 minutes.
A third embodiment;
as shown in fig. 3, the present invention provides a whole vehicle flameout condition driving state detection module, which includes:
the output end of the logic unit is connected with the input end of the motor position sensor, and the two input ends of the logic unit are respectively connected with the ignition signal of the whole vehicle and the output end of the controllable switch;
the input end of the control unit receives the instruction of the vehicle body controller, and the output end of the control unit is connected with the control end of the controllable switch to control the on-off of the controllable switch;
the other input end of the controllable switch is connected with the output voltage of the vehicle body controller;
the control unit receives an instruction of the vehicle body controller so that the controllable switch intermittently switches on and off at a preset frequency to supply power to the motor position sensor.
Illustratively, the logic unit selects an OR gate circuit, the control unit selects a pulse generator, the controllable switch selects a triode, a collector is connected with the vehicle body controller, a base is connected with the output end of the pulse generator, and an emitter is connected with one input end of the OR gate circuit.
A fourth embodiment;
referring to fig. 3 to 5, the present invention provides a system for protecting a flameout condition driving motor of a whole vehicle, which has the flameout condition driving state detecting module of the whole vehicle, and includes:
the motor signal acquisition module is used for acquiring a motor rotating speed signal, decoding the motor rotating speed signal and then transmitting the motor rotating speed signal to the vehicle body controller;
the state detection module is used for receiving an instruction of the vehicle body controller by a receiving end to supply power to the motor position sensor;
and the vehicle body controller is used for outputting a preset frequency intermittent on-off instruction to supply power to the motor position sensor and simultaneously acquire the state of the motor when detecting a preset excitation signal, and the motor state executes motor protection, wherein the preset excitation signal is a negative excitation signal generated by converting a finished vehicle ignition signal from a high level to a low level.
A fifth embodiment;
with continuing reference to fig. 3-5, the present invention provides a system for protecting a flameout condition driving motor of a whole vehicle with the module for detecting a flameout condition of the whole vehicle, comprising:
the motor signal acquisition module is used for acquiring a motor rotating speed signal, decoding the motor rotating speed signal and then transmitting the motor rotating speed signal to the vehicle body controller;
the state detection module is used for receiving an instruction of the vehicle body controller by a receiving end to supply power to the motor position sensor;
the vehicle body controller is used for outputting a preset frequency intermittent on-off instruction to supply power to the motor position sensor and simultaneously acquire a motor state, and the motor state executes motor protection when detecting a preset excitation signal, wherein the preset excitation signal is a negative excitation signal generated by converting a finished vehicle ignition signal from a high level to a low level;
the motor protection includes:
A. the ignition signal voltage V ranges: v is not less than V2 and not more than V1, and no protection operation is performed;
B. the ignition signal voltage V ranges: v is less than V1, the rotating speed of the motor is 0, and the protection operation is not executed;
C. the ignition signal voltage V ranges: v is less than V1, and the motor rotating speed RP range is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t is more than or equal to T1 and less than T2 minutes, and no protection operation is performed;
D. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t1 is less than or equal to T, and an alarm is output;
E. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP2 is less than or equal to RP, and an alarm is output;
wherein, V1, V2 are voltage values designated according to motor performance, T1, T2 are time lengths designated according to motor performance, and RP1, RP2 are rotating speeds designated according to motor performance;
exemplarily, the motor signal acquisition module comprises a position sensor integrated in the motor and a decoding chip used for decoding a position sensor signal, and the alarm can be selectively output through a vehicle-mounted buzzer;
v1 is 0 < V1 < 5.9V, V1 is preferably 5.9V;
the range of V2 is 5.9V < V2 ≤ 16V, and V2 is preferably 16V;
the range of RP1 is 0rpm ≦ RP1 ≦ 1rpm, and RP1 is preferably 1 rpm;
the range of RP2 is 4000rpm ≦ RP2 ≦ 5000rpm, and RP2 is preferably 5000 rpm;
t1 is in the range of 0 min. ltoreq. T1. ltoreq.1 min, T1 is preferably 0 min;
the T2 range is 10 minutes. ltoreq. T1. ltoreq.15 minutes, T2 is preferably 15 minutes.
And, the above is only an exemplary embodiment, and the present invention can achieve protection of the motor as long as the vehicle is not in an ignition state (including an active key-off or a passive key-off). For example, the parking function is accidentally disabled, and the vehicle slides after the power of the whole vehicle is cut off.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The present invention has been described in detail with reference to the specific embodiments and examples, but these are not intended to limit the present invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which should also be considered as within the scope of the present invention.
Claims (10)
1. A method for protecting a driving motor under a flameout working condition of a whole vehicle is characterized by comprising the following steps of:
s1, detecting the ignition signal of the whole vehicle in real time;
s2, if a preset excitation signal is detected, intermittently supplying power to the state detection module through the vehicle body controller at a preset frequency and collecting the state of the motor;
and S3, executing motor protection according to the motor state.
2. The method for protecting the driving motor under the flameout condition of the whole vehicle as claimed in claim 1, is characterized in that: the preset excitation signal is a negative excitation signal generated by converting a vehicle ignition signal from a high level to a low level.
3. The vehicle flameout condition driving motor protection method according to claim 1, wherein the motor state comprises: ignition signal voltage and motor speed, and the duration of time that the motor operates at the ignition signal voltage and motor speed.
4. The vehicle flameout condition driving motor protection method according to claim 3, wherein the motor protection comprises:
A. the ignition signal voltage V ranges: v is not less than V2 and not more than V1, and no protection operation is performed;
B. the ignition signal voltage V ranges: v is less than V1, the rotating speed of the motor is 0, and the protection operation is not executed;
C. the ignition signal voltage V ranges: v is less than V1, and the motor rotating speed RP range is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t is more than or equal to T1 and less than T2 minutes, and no protection operation is performed;
D. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t1 is less than or equal to T, and an alarm is output;
E. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP2 is less than or equal to RP, and an alarm is output;
wherein, V1, V2 are voltage values designated according to motor performance, T1, T2 are time lengths designated according to motor performance, and RP1, RP2 are rotating speeds designated according to motor performance.
5. The utility model provides a whole car flameout operating mode drive state detection module which characterized in that includes:
the output end of the logic unit is connected with the input end of the motor position sensor, and the two input ends of the logic unit are respectively connected with the ignition signal of the whole vehicle and the output end of the controllable switch;
the input end of the control unit receives the instruction of the vehicle body controller, and the output end of the control unit is connected with the control end of the controllable switch to control the on-off of the controllable switch;
and the other input end of the controllable switch is connected with the output voltage of the automobile body controller.
6. The vehicle flameout condition driving state detection module as claimed in claim 5, characterized in that: the control unit receives the instruction of the vehicle body controller so that the controllable switch intermittently switches on and off at a preset frequency to supply power to the motor position sensor.
7. A vehicle flameout condition drive motor protection system with the vehicle flameout condition drive state detection module as claimed in claim 5, comprising:
the motor signal acquisition module is used for acquiring a motor rotating speed signal, decoding the motor rotating speed signal and then transmitting the motor rotating speed signal to the vehicle body controller;
the state detection module is used for receiving an instruction of the vehicle body controller by a receiving end to supply power to the motor position sensor;
and the automobile body controller is used for detecting a preset excitation signal, outputting an instruction to supply power to the motor position sensor and simultaneously acquiring the motor state, and executing motor protection according to the motor state.
8. The vehicle flameout condition driving motor protection system according to claim 7, characterized in that: the preset excitation signal is a negative excitation signal generated by converting a vehicle ignition signal from a high level to a low level.
9. The vehicle flameout condition driving motor protection system according to claim 7, characterized in that: the output instruction is a preset frequency intermittent on-off instruction of the controllable switch.
10. The vehicle flameout condition drive motor protection system according to claim 7, wherein the motor protection comprises:
A. the ignition signal voltage V ranges: v is not less than V2 and not more than V1, and no protection operation is performed;
B. the ignition signal voltage V ranges: v is less than V1, the rotating speed of the motor is 0, and the protection operation is not executed;
C. the ignition signal voltage V ranges: v is less than V1, and the motor rotating speed RP range is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t is more than or equal to T1 and less than T2 minutes, and no protection operation is performed;
D. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP1 is more than or equal to RP and less than RP2, and the duration T range is as follows: t1 is less than or equal to T, and an alarm is output;
E. the voltage range of the ignition signal is V < V1, and the rotating speed range of the motor is as follows: RP2 is less than or equal to RP, and an alarm is output;
wherein, V1, V2 are voltage values designated according to motor performance, T1, T2 are time lengths designated according to motor performance, and RP1, RP2 are rotating speeds designated according to motor performance.
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