CN113702704A - Motor zero position detection method and device for new energy vehicle and related vehicle - Google Patents
Motor zero position detection method and device for new energy vehicle and related vehicle Download PDFInfo
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- CN113702704A CN113702704A CN202110810538.9A CN202110810538A CN113702704A CN 113702704 A CN113702704 A CN 113702704A CN 202110810538 A CN202110810538 A CN 202110810538A CN 113702704 A CN113702704 A CN 113702704A
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- G01R25/04—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents involving adjustment of a phase shifter to produce a predetermined phase difference, e.g. zero difference
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Abstract
The invention discloses a motor zero position detection method and device for a new energy vehicle and a related vehicle. The method comprises the following steps: electrifying a U phase of the motor to generate a first magnetic field in the motor, and detecting and acquiring a first rotating angle of a rotor of the motor; electrifying the V phase of the motor to generate a second magnetic field in the motor, and detecting and acquiring a second rotation angle of a rotor of the motor; electrifying the W phase of the motor to generate a third magnetic field in the motor, and detecting and acquiring a third rotation angle of a motor rotor; and acquiring a zero calibration value of the motor based on the first rotation angle, the second rotation angle and the third rotation angle of the rotor. The motor controller can calculate the phase angle of the motor stator driving current and the exciting current according to the standard zero value, and the motor is controlled to operate efficiently. The motor manufacturing circumference error can be corrected to a certain extent by a method of comprehensively calculating the zero value of the motor from three angles.
Description
Technical Field
The specification relates to the technical field of new energy vehicles, in particular to a motor zero position detection method and device of a new energy vehicle and a related vehicle.
Background
The new energy automobile reads the rotating speed and the phase angle of the rotor of the motor through the rotary transformer signal and controls the current vector of the stator of the motor according to the torque requirement, so that the effect of controlling the torque of the motor is achieved. The deviation of the zero angle compensation value of the motor can affect the sizes of exciting current and torque current, and further affect the torque control precision and efficiency of the motor.
When the motor leaves a factory, zero calibration is carried out on the rotary transformer and rotor signals of the motor once, and the motor controller can calculate the phase angle of the stator driving current and the exciting current according to the zero calibration value to control the motor to run efficiently. However, after the new energy vehicle works for a long time, the installation angle of the rotary transformer can deviate due to the influence of factors such as vibration and temperature, so that the control precision and efficiency of the motor are reduced, and then the motor needs to be subjected to zero calibration again, so that the control precision and the efficiency are improved.
Therefore, it is necessary to provide a zero detection method for an electric machine of a new energy vehicle to at least partially solve the problems in the prior art.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described 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.
In order to at least partially solve the above problem, in a first aspect, the present invention provides a method for detecting a zero position of an electric machine of a new energy vehicle, where the method includes:
electrifying a U phase of the motor to generate a first magnetic field in the motor, and detecting and acquiring a first rotating angle of a rotor of the motor;
electrifying the V phase of the motor to generate a second magnetic field in the motor, and detecting and acquiring a second rotation angle of a rotor of the motor;
electrifying the W phase of the motor to generate a third magnetic field in the motor, and detecting and acquiring a third rotation angle of a motor rotor;
and acquiring a zero calibration value of the motor based on the first rotation angle, the second rotation angle and the third rotation angle of the rotor.
In a possible embodiment, the step of powering up the U-phase of the motor includes:
applying a positive voltage to the U-phase and a negative voltage to the V-phase to cause a current to flow through the U-phase to the V-phase;
or
Applying a positive voltage to the U-phase and a negative voltage to the V-phase and the W-phase to pass a current through the U-phase to the V-phase and the W-phase;
the current flowing through the U phase is larger than a first threshold value and smaller than a second threshold value.
In a possible embodiment, the step of powering the V-phase of the motor includes:
applying a positive voltage to the V-phase and a negative voltage to the W-phase to pass a current through the V-phase to the W-phase;
or
Applying a positive voltage to the V-phase and a negative voltage to the U-phase and the W-phase to pass a current through the V-phase to the U-phase and the W-phase;
the current flowing through the V phase is greater than a first threshold value and less than a second threshold value.
In a possible embodiment, the step of powering up the W phase of the motor includes:
applying a positive voltage to the W phase and a negative voltage to the U phase to pass a current through the W phase to the U phase;
or
Applying a positive voltage to the W phase and applying a negative voltage to the U phase and the V phase to pass a current through the W phase to the U phase and the V phase;
the current flowing through the W phase is larger than a first threshold value and smaller than a second threshold value.
In a possible embodiment, the first rotation angle of the rotor, the second rotation angle of the rotor, and the third rotation angle of the rotor are measured and obtained by a motor rotation signal conversion processing unit.
In a possible implementation manner, the method for detecting the zero position of the motor of the new energy vehicle further includes:
storing the motor zero calibration value in a driving motor control unit of the new energy vehicle;
and/or
And storing the motor zero calibration value in a control unit of the power generation all-in-one machine.
In a possible embodiment, before the step of supplying power to the U-phase of the motor to generate the first magnetic field in the motor, the step of detecting the first rotation angle of the rotor further includes:
receiving a motor zero detection instruction;
detecting the operation state of the new energy vehicle;
and responding to the motor zero detection instruction under the condition that the operation state of the new energy vehicle meets the detection requirement.
In a second aspect, a motor zero position detection device for a new energy vehicle includes:
a memory storing a computer program;
a processor for executing the computer program;
when the processor executes the computer program, the method for detecting the zero position of the motor of the new energy vehicle according to the first aspect is implemented.
In a third aspect, the invention further provides a new energy vehicle, which includes the motor zero position detection device introduced in the second aspect.
Optionally, the new energy vehicle further includes: a transmission system, a clutch and a motor;
the motor is connected to the transmission system through the clutch, and the motor zero position detection device is used for executing the computer program through the processor under the condition that the clutch is disconnected, so that the motor zero position detection method of the new energy vehicle is realized, and the motor zero position calibration value of the motor is detected and obtained.
In summary, in the method for detecting the zero position of the motor of the new energy vehicle according to the embodiment of the present application, the U phase of the motor is powered on, so that a first magnetic field is generated in the motor, and a first rotation angle of a rotor of the motor is detected and obtained; electrifying the V phase of the motor to generate a second magnetic field in the motor, and detecting and acquiring a second rotation angle of the rotor of the motor; electrifying the W phase of the motor to generate a third magnetic field in the motor, and detecting and acquiring a third rotation angle of the rotor of the motor; acquiring a motor zero calibration value based on the first rotation angle, the second rotation angle and the third rotation angle of the rotor; the zero offset value is solidified and stored, and the motor controller can calculate the phase angle of the motor stator driving current and the exciting current according to the zero offset value, so as to control the motor to operate efficiently; the motor manufacturing circumference error can be corrected to a certain extent by a method of comprehensively calculating the zero value of the motor from three angles; the clutch is additionally arranged between the transmission system and the motor, and a shaft of the motor can enter a free rotation state during zero position detection, so that friction force generated by a gear set inside the transmission system is isolated, a rotor of the motor can rotate to a position only by applying a small voltage to the motor, the motor is firmly attracted, energy consumption in the detection process is reduced, and the motor is not damaged by the small voltage.
Correspondingly, the new energy vehicle provided by the embodiment of the invention also has the technical effects.
Other advantages, objects, and features of the method for detecting zero position of motor of new energy vehicle according to the present invention will be in part apparent from the following description and in part will become apparent to those skilled in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the specification. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic flowchart of a possible zero position detection method for a motor of a new energy vehicle according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of a possible method for detecting a motor operating state of a new energy vehicle according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a possible zero position detection device for a motor of a new energy vehicle according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a possible new energy vehicle provided in an embodiment of the present application;
fig. 5 is a schematic flow chart of a possible zero position detection matching method for a motor of a hybrid electric vehicle according to an embodiment of the present application;
fig. 6 is a schematic flow chart of a possible zero position detection method for a motor of a hybrid electric vehicle according to an embodiment of the present application.
Detailed Description
The embodiment of the application provides a motor zero position detection method and device for a new energy vehicle and a related vehicle, and the motor zero position detection, the zero position value storage and the more optimal control of the motor work can be realized.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
Referring to fig. 1, a schematic flow chart of a possible method for detecting a zero position of a motor of a new energy vehicle according to an embodiment of the present application may include: S110-S140.
And S110, electrifying the U phase of the motor to generate a first magnetic field in the motor, and detecting and acquiring a first rotating angle of the rotor of the motor.
Specifically, the motor control unit and/or the starting generator integrated machine control unit are/is driven to enter a pulse width modulation control mode, the driving power module is positive 1-2V voltage on a U phase, negative 1-2V voltage on a V phase, a first magnetic field is generated in the motor due to the magnetic effect of current, under the action of the first magnetic field, a motor rotor rotates due to the interaction between the magnetic fields and stays at one position, and at the moment, a motor rotation signal conversion processing unit detects a first rotation angle which is recorded as theta1。
And S120, electrifying the V phase of the motor to generate a second magnetic field in the motor, and detecting and acquiring a second rotation angle of the rotor of the motor.
Specifically, the motor control unit and/or the starting generator integrated machine control unit are/is driven to enter a pulse width modulation control mode, the driving power module is positive 1-2V voltage on a V phase, negative 1-2V voltage on a W phase, a second magnetic field is generated in the motor due to the magnetic effect of current, under the action of the second magnetic field, the motor rotor rotates due to the interaction between the magnetic fields and stays at one position, and at the moment, the motor rotation change signal conversion processing unit detects a second rotation angle which is recorded as theta2。
And S130, electrifying the W phase of the motor to generate a third magnetic field in the motor, and detecting and acquiring a third rotation angle of the rotor of the motor.
Specifically, the motor control unit is driven and/or the generator-start integrated machine control unit is started to enter a pulse width modulation control modeThe driving power module is positive 1-2V voltage on the W phase, negative 1-2V voltage on the U phase, a third magnetic field is generated in the motor, the motor rotor rotates under the action of the third magnetic field, and a motor rotation signal conversion processing unit detects a third rotation angle which is recorded as theta3；
And S140, acquiring a zero calibration value of the motor based on the first rotation angle, the second rotation angle and the third rotation angle of the rotor.
Specifically, ideally, the stators of the three-phase asynchronous ac motor are uniformly distributed on the housing of the motor, but since there may be a deviation in the included angle between each stator in the actual manufacturing process, the present embodiment measures three rotation angles generated by the three magnetic fields driving the rotor of the motor, and finds the average value θ of the three rotation angles: theta ═ theta1+θ2+θ3) And/3, taking the obtained value as a zero calibration value of the motor, comprehensively considering the angular deviation between the stators and being beneficial to eliminating the manufacturing circumferential error of the motor.
In summary, the method for detecting the zero position of the motor of the new energy vehicle provided by the embodiment comprehensively considers three rotation angles generated by the rotor driven by three magnetic fields generated by the motor, and obtains the zero position calibration value of the motor, so that the method is beneficial to eliminating the manufacturing circumference error of the motor, is beneficial to controlling the motor, and enables the motor to run stably and efficiently.
According to some embodiments, the method for detecting the zero position of the motor of the new energy vehicle may further include:
applying a positive voltage to the U-phase and a negative voltage to the V-phase to cause a current to flow through the U-phase to the V-phase;
specifically, the motor control unit is driven and/or the generator-start integrated machine control unit is started to enter a pulse width modulation control mode, the drive power module applies positive 1-2V voltage to the U phase and negative 1-2V voltage to the V phase, and at the moment, the rotor of the motor rotates to a position corresponding to the first rotation angle under the drive of the magnetic field.
Or
Applying a positive voltage to the U-phase and a negative voltage to the V-phase and the W-phase to pass a current through the U-phase to the V-phase and the W-phase;
specifically, the motor control unit and/or the starting generator all-in-one machine control unit are/is driven to enter a pulse width modulation control mode, the driving power module applies positive 1-2V voltage to a U phase, negative 1-2V voltage to a V phase and negative 1-2V voltage to a W phase, the motor generates a fixed magnetic field, and at the moment, a rotor of the motor rotates to a position corresponding to a first rotation angle under the driving of the magnetic field.
The current flowing through the U phase is larger than a first threshold value and smaller than a second threshold value.
Specifically, the first threshold is 40A, and the first threshold is set to enable the motor to generate a magnetic field large enough to drive the rotor to counteract the friction force in the system to rotate, and ensure that the magnetic field generated by the motor winding is reliably attracted with the magnetic field of the motor rotor; the second threshold is 100A, and the second threshold is set to ensure that the current is not too large, so as to prevent the motor from being damaged.
According to some embodiments, the method for detecting the zero position of the motor of the new energy vehicle may further include:
applying a positive voltage to the V-phase and a negative voltage to the W-phase to pass a current through the V-phase to the W-phase;
specifically, the driving motor control unit and/or the starting generator integrated machine control unit enter a pulse width modulation control mode, the driving power module applies positive 2V voltage to a V phase and applies negative 2V voltage to a W phase, the motor generates a fixed magnetic field, and at the moment, a rotor of the motor rotates to a position corresponding to a first rotation angle under the driving of the magnetic field.
Or
Applying a positive voltage to the V-phase and a negative voltage to the W-phase and the U-phase to pass a current through the V-phase to the W-phase and the U-phase;
specifically, the motor control unit and/or the starting generator all-in-one machine control unit are/is driven to enter a pulse width modulation control mode, the driving power module applies positive 1-2V voltage to a V phase, applies negative 1-2V voltage to a W phase and applies negative 1-2V voltage to a U phase, the motor generates a fixed magnetic field, and at the moment, a rotor of the motor rotates to a position corresponding to a second rotation angle under the driving of the magnetic field.
The current flowing through the V phase is greater than a first threshold value and less than a second threshold value.
Specifically, the first threshold is 40A, and the first threshold is set to enable the motor to generate a magnetic field large enough to drive the rotor to counteract the friction force in the system to rotate, and ensure that the magnetic field generated by the motor winding is reliably attracted with the magnetic field of the motor rotor; the second threshold is 100A, and the second threshold is set to ensure that the current is not too large, so as to prevent the motor from being damaged.
According to some embodiments, the method for detecting the zero position of the motor of the new energy vehicle may further include:
applying a positive voltage to the W phase and a negative voltage to the U phase to pass a current through the W phase to the U phase;
specifically, the motor control unit is driven and/or the generator-start integrated machine control unit enters a pulse width modulation control mode, the drive power module applies positive 1-2V voltage to the W phase and applies negative 1-2V voltage to the U phase, the motor generates a fixed magnetic field, and at the moment, the rotor of the motor rotates to a position corresponding to a third rotation angle under the drive of the magnetic field.
Or
Applying a positive voltage to the W phase and applying a negative voltage to the U phase and the V phase to pass a current through the W phase to the U phase and the V phase;
specifically, the motor control unit and/or the starting generator all-in-one machine control unit are/is driven to enter a pulse width modulation control mode, the driving power module applies positive 1-2V voltage to the W phase, applies negative 1-2V voltage to the U phase, and applies negative 1-2V voltage to the V phase, the motor generates a fixed magnetic field, and at the moment, the rotor of the motor rotates to a position corresponding to a third rotation angle under the driving of the magnetic field.
The current flowing through the W phase is larger than a first threshold value and smaller than a second threshold value.
Specifically, the first threshold is 40A, and the first threshold is set to enable the motor to generate a magnetic field large enough to drive the rotor to counteract the friction force in the system to rotate, and ensure that the magnetic field generated by the motor winding is reliably attracted with the magnetic field of the motor rotor; the second threshold is 100A, and the second threshold is set to ensure that the current is not too large, so as to prevent the motor from being damaged.
According to some embodiments, in the method for detecting zero position of a motor of a new energy vehicle, the first rotation angle of the rotor, the second rotation angle of the rotor, and the third rotation angle of the rotor are measured and obtained by a motor rotation signal conversion processing unit.
Specifically, the motor rotation signal conversion processing unit is connected with the motor, and outputs a value of 0 to 4095 corresponding to 0 to 360 degrees of the motor rotor.
According to some embodiments, the method for detecting the zero position of the motor of the new energy vehicle further includes:
storing the motor zero calibration value in a driving motor control unit of the new energy vehicle;
and/or
And storing the motor zero calibration value in a control unit of the power generation all-in-one machine.
Specifically, when the motor is a motor, the encrypted zero-point detection calibration value of the motor system after the safety check processing is written into a memory of a drive motor control unit of the energy vehicle for solidification, and when the motor is a generator, the encrypted zero-point detection calibration value of the motor system after the safety check processing is written into the memory of a storage and starting power generation integrated machine control unit of the energy vehicle for solidification.
Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a method for detecting a motor operation state of a new energy vehicle according to an embodiment of the present application.
According to some embodiments, before the step of powering on the U-phase of the motor to generate the first magnetic field in the motor and detecting and acquiring the first rotation angle of the rotor, the method specifically further includes: S210-S230;
s210, receiving a motor zero detection instruction;
s220, detecting the operation state of the new energy vehicle;
and S230, responding to the motor zero position detection instruction under the condition that the operation state of the new energy vehicle meets the detection requirement.
Specifically, the steps include: the whole vehicle is electrified, the whole vehicle control unit detects the vehicle state, the vehicle has no serious fault, and the vehicle speed must be 0. And detecting whether a zero calibration matching mode instruction of the electric drive system is received or not, and if not, entering a working mode of the electric drive system. The state of the electric drive system is detected, the electric drive system is fault-free, and the motor speed must be 0.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a zero position detection device of a motor of a new energy vehicle according to an embodiment of the present application.
The motor zero position detection device of the new energy vehicle provided by the embodiment shown in fig. 3 includes:
comprising a memory 310, a processor 320 and a computer program 311 stored on the memory 310 and executable on the processor, wherein the processor 320 executes the computer program 311 to implement the steps of any one of the methods for detecting zero position of motor of new energy vehicle as described above
Since the electronic device described in this embodiment is a device used for implementing an application protection apparatus in this embodiment, based on the method described in this embodiment, a person skilled in the art can understand the specific implementation manner of the electronic device of this embodiment and various variations thereof, so that how to implement the method in this embodiment by the electronic device is not described in detail herein, and as long as the person skilled in the art implements the device used for implementing the method in this embodiment, the device is within the scope of the present application.
In a specific implementation, the computer program 311 may implement any of the embodiments corresponding to fig. 1 when executed by the processor 320.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a new energy vehicle according to an embodiment of the present application.
The new energy vehicle provided by the embodiment shown in fig. 4 includes the motor zero position detection device 300 described above.
The method specifically comprises the following steps: the system comprises a motor 11, a first clutch 12, a transmission system 13, a first rotary transformer 14, a control unit 15, a second rotary transformer 16, a generator 17 and a second clutch 18.
The control unit 15 further includes: a first motor rotation signal conversion processing unit 151, a driving motor control unit 152, a whole vehicle control unit 153, a starting power generation integrated machine control unit 154, and a second motor rotation signal conversion processing unit 155.
Specifically, the first resolver 14, the motor 11, the first clutch 12, the transmission system 13, the second clutch 18, the generator 17, and the second resolver 16 are mechanically connected in sequence;
the motor zero-position detection device 300 of the energy vehicle is in communication connection with the vehicle control unit 153, the vehicle is electrified under the control of the computer program 311 in the detection device, the vehicle control unit 153 detects the vehicle state, the state of the electric drive system is detected after the zero-position calibration matching mode instruction of the electric drive system is received, the first clutch 12 and/or the second clutch 18 are controlled to be disconnected, the output shaft of the motor 11 and/or the input shaft of the generator 17 are/is enabled to enter a free rotation state, the friction force generated by the gear set in the transmission system is isolated, only a small voltage needs to be applied to the motor 11 and/or the generator 17, the rotor of the motor can rotate to the position, the attraction is firm, the energy consumption in the detection process is reduced, and meanwhile the motor system is protected by the small voltage. The motor system enters a zero point detection calibration mode, during the detection process, the whole vehicle control unit 153 controls the driving motor control unit 152 and the starting and generating integrated machine control unit 154 to enter a pulse width modulation control mode, drives the power module of the motor 11 and/or the generator 17 to conduct U, V, W phases of the motor according to the method, the value of the rotation angle of the rotor of the motor 11 and/or the generator 17 is read by the first motor rotation signal conversion processing unit 151 and/or the second motor rotation signal conversion processing unit 155, and the zero position value of the motor and/or the generator is obtained by calculation according to the method, after the zero position data is encrypted and subjected to security check processing, and writing the data into the memory of the drive motor control unit 152 and/or the start generator all-in-one control unit 154, and ending the zero position detection calibration process of the motor 11 and/or the generator 17. The vehicle control unit 153 controls the first clutch 12 and/or the second clutch 18 to be closed.
Referring to fig. 5, fig. 5 is a schematic flow chart of a possible zero position detection and matching method for a motor of a hybrid electric vehicle according to an embodiment of the present disclosure.
As shown in fig. 5, the method for detecting and matching the zero position of the new energy vehicle motor provided by the embodiment of the application specifically includes: S510-S580.
And S510, starting a new energy automobile motor zero position detection matching process.
S520, electrifying the system, and detecting the vehicle state;
specifically, whether the required modules work normally when the vehicle executes a detection matching process is detected;
if the detection matching instruction is normally sent to the corresponding module;
if not, S540 is performed, fault information is recorded, S580 is performed, and the detection matching mode ends.
S530, detecting whether the calibration working state is met;
specifically, the calibration operating state is whether the vehicle speed is zero or not and whether the engine speed is zero or not;
if the calibration state is not satisfied, executing S540, recording fault information, executing S580, and detecting the end of the matching mode;
if the calibration state is satisfied, S550 is executed, the clutch is disengaged, and the motor and the transmission system are disengaged.
S560, a motor zero position detection process;
s570, closing the clutch, and combining the motor and the transmission system;
and S580, finishing the zero position detection matching process of the new energy automobile motor.
As mentioned in the above S560, the motor zero position detection process specifically includes steps S5601-S5610, please refer to fig. 6, and fig. 6 is a schematic flow chart of a possible motor zero position detection method for a hybrid electric vehicle according to an embodiment of the present disclosure.
As shown in fig. 6, a possible zero position detection method for a motor of a hybrid electric vehicle according to an embodiment of the present application specifically includes: S5601-S5610.
S5601, a motor zero position detection process starts;
s5602, whether the motor meets a calibration state is detected;
specifically, the calibration state is that the rotating speed of the motor is 0;
if not, executing S5608, recording fault information, and continuing to execute S5610 to finish the motor zero position detection process;
if yes, S5603 is executed, the motor control unit or the starting/generating integrated machine control unit enters a PWM current control mode, the U-phase positive and the V-phase negative of the motor are conducted, the voltage value is 2V, step S5604 is executed, whether the phase current is larger than 40A and smaller than 100A is detected, if not, S5608 is executed, fault information is recorded, S5610 is executed, and the motor zero position detection process is ended; if yes, S5605 is executed, and an angle value of the motor rotation signal conversion processing unit is read;
s5606, judge whether the test of three times is finished, should be unfinished at this moment;
continuing to execute S5603, enabling the motor control unit or the starting/generating integrated machine control unit to enter a PWM current control mode, conducting the positive phase and the negative phase of the V phase of the motor, enabling the voltage value to be 2V, executing S5604, detecting whether the phase current is larger than 40A and smaller than 100A, if not, executing S5608, recording fault information, executing S5610, and finishing the motor zero position detection process; if yes, S5605 is executed, and an angle value of the motor rotation signal conversion processing unit is read;
s5606, judge whether the test of three times is finished, should be unfinished at this moment;
continuing to execute S5603, enabling the motor control unit or the starting/generating integrated machine control unit to enter a PWM current control mode, conducting the W-phase positive and the U-phase negative of the motor, enabling the voltage value to be 2V, executing S5604, detecting whether the phase current is larger than 40A and smaller than 100A, if not, executing S5608, recording fault information, executing S5610, and finishing the motor zero position detection process; if yes, S5605 is executed, and an angle value of the motor rotation signal conversion processing unit is read;
s5606, judge whether the test of three times is finished, should finish at this moment;
s5607, solving the average value of the values read by the tertiary motor rotation signal conversion processing unit as a motor zero-bit value;
s5609 writing the zero value into the internal storage medium of the motor control unit or the starting/generating integrated machine control unit;
specifically, if the motor is a generator, writing a zero value into an internal storage medium of the starting/generating all-in-one machine control unit, and if the motor is a motor, writing a zero value into an internal storage medium of the motor control unit;
and S5610, ending the motor zero detection process.
It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Embodiments of the present application further provide a computer program product, where the computer program product includes computer software instructions, and when the computer software instructions are run on a processing device, the processing device is caused to execute the flow in the application protection method in the embodiment corresponding to fig. 1.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A motor zero position detection method of a new energy vehicle is characterized by comprising the following steps:
electrifying a U phase of the motor to generate a first magnetic field in the motor, and detecting and acquiring a first rotating angle of a rotor of the motor;
electrifying the V phase of the motor to generate a second magnetic field in the motor, and detecting and acquiring a second rotation angle of a rotor of the motor;
electrifying the W phase of the motor to generate a third magnetic field in the motor, and detecting and acquiring a third rotation angle of a motor rotor;
and acquiring the zero calibration value of the motor based on the first rotation angle, the second rotation angle and the third rotation angle of the rotor.
2. The method for detecting the zero position of the motor of the new energy vehicle as claimed in claim 1, wherein the step of powering on the U phase of the motor comprises:
applying a positive voltage to the U-phase and a negative voltage to the V-phase to pass current through the U-phase to the V-phase;
or
Applying a positive voltage to the U-phase and a negative voltage to the V-phase and the W-phase to pass current through the U-phase to the V-phase and the W-phase;
and the current flowing through the U phase is greater than a first threshold value and less than a second threshold value.
3. The method for detecting the zero position of the motor of the new energy vehicle as claimed in claim 1, wherein the step of powering on the V phase of the motor comprises:
applying a positive voltage to the V-phase and a negative voltage to the W-phase to pass current through the V-phase to the W-phase;
or
Applying a positive voltage to the V-phase and a negative voltage to the U-phase and the W-phase to pass current through the U-phase to the U-phase and the W-phase;
and the current flowing through the V phase is greater than a first threshold value and less than a second threshold value.
4. The method for detecting the zero position of the motor of the new energy vehicle as claimed in claim 1, wherein the step of powering on the W phase of the motor comprises:
applying a positive voltage to the W phase and a negative voltage to the U phase to pass current through the W phase to the U phase;
or
Applying a positive voltage to the W phase and a negative voltage to the U phase and the V phase to pass current through the W phase to the U phase and the V phase;
and the current flowing through the W phase is greater than a first threshold value and less than a second threshold value.
5. The motor zero position detection method of the new energy vehicle according to any one of claims 1 to 4,
the first rotor rotation angle, the second rotor rotation angle and the third rotor rotation angle are measured and obtained through a motor rotation signal conversion processing unit.
6. The motor zero position detection method of the new energy vehicle as claimed in any one of claims 1 to 4, further comprising:
storing the motor zero calibration value in a driving motor control unit of the new energy vehicle;
and/or
And storing the motor zero calibration value in a control unit of the power generation all-in-one machine.
7. The method for detecting the zero position of the motor of the new energy vehicle as claimed in any one of claims 1 to 4, wherein the step of detecting the first rotation angle of the rotor before the step of powering on the U phase of the motor to generate the first magnetic field in the motor further comprises:
receiving the motor zero position detection instruction;
detecting the operation state of the new energy vehicle;
and responding to the motor zero detection instruction under the condition that the operation state of the new energy vehicle meets the detection requirement.
8. The utility model provides a new energy vehicle's motor zero position detection device which characterized in that includes:
a memory storing a computer program;
a processor executing the computer program;
wherein the processor, when executing the computer program, implements the motor zero detection method of the new energy vehicle of any one of claims 1 to 7.
9. A new energy vehicle, characterized by comprising:
the motor zero position detection device of claim 8.
10. The new energy vehicle according to claim 9, characterized by further comprising: a transmission system, a clutch and a motor;
the motor is connected to the transmission system through the clutch, and the motor zero position detection device is used for implementing the motor zero position detection method of the new energy vehicle as claimed in any one of claims 1 to 7 by executing the computer program through the processor under the condition that the clutch is disconnected, and detecting and acquiring the motor zero position calibration value of the motor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110810538.9A CN113702704A (en) | 2021-07-16 | 2021-07-16 | Motor zero position detection method and device for new energy vehicle and related vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110810538.9A CN113702704A (en) | 2021-07-16 | 2021-07-16 | Motor zero position detection method and device for new energy vehicle and related vehicle |
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| CN113702704A true CN113702704A (en) | 2021-11-26 |
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