KR102479539B1 - Integrated Motor Control Method of Electric Vehicle Using System for Estimating Remaining Travel Distance - Google Patents

Abstract

An integrated motor control method for an electric vehicle according to the present invention includes the steps of acquiring temperature information of one or more of a driving motor, an EWP motor, and a compressor motor, and controlling the speed of the motor by comparing the obtained temperature information with a preset temperature. , calculating the remaining mileage of the electric vehicle, controlling the speed of the motor according to the calculated remaining mileage, and correcting the speed to increase the accuracy of the motor speed control.

Description

Integrated Motor Control Method of Electric Vehicle Using System for Estimating Remaining Travel Distance

The present invention relates to an integrated motor control method for an electric vehicle, and calculates the remaining mileage based on remaining battery capacity information, driver's driving pattern information, and road condition information in addition to temperature information in order to efficiently control motor speed. It relates to a method for integrated motor control of an electric vehicle for integrated control of motor speed using calculated remaining mileage information.

In recent years, there has been a growing demand for the development of eco-friendly vehicles due to concerns over fossil fuel depletion and strengthened environmental regulations, and mass production of electric vehicles is in full swing due to the rapid development of secondary battery systems. In conventional engine vehicles, the refrigerant is compressed by a belt-driven compressor (compressor) using engine power, and in an electric vehicle, the refrigerant is compressed by applying an electric compressor using high voltage. Since the electric compressor uses high voltage, it is a module type composed of a motor, an inverter, and a compression unit. In an electric vehicle, a motor control unit (MCU) is an integrated control system that controls a driving motor, operates an electric water pump (EWP), and operates an electric compressor.

As described above, since a motor in an electric vehicle performs the same very important function as an engine, an effective and integrated control method or control system is required for it. However, conventional motor integrated control methods have problems in that accurate control is difficult and efficient control is not possible. Accordingly, it is intended to control the electric vehicle's motor in an integrated and effective manner by utilizing the remaining distance calculation system.

The remaining driving distance calculation system is similar to how a driver predicts the driving distance by the amount of fuel remaining in the fuel tank on the instrument panel in an internal combustion engine. It is predicted based on State of Charge (SOC). However, most conventional electric vehicle remaining mileage calculation systems have a problem in that they cannot accurately calculate the remaining mileage by estimating the remaining mileage based on the average mileage without considering various variables and factors.

Korean Patent Publication No. 10-2015-0089272 (published on August 5, 2015)

The present invention has been made in view of the above problems, and an object of the present invention is to provide an integrated motor control method for an electric vehicle by utilizing a remaining mileage calculating system.

An integrated motor control method for an electric vehicle according to the present invention includes the steps of acquiring temperature information of one or more of a driving motor, an EWP motor, and a compressor motor, and controlling the speed of the motor by comparing the obtained temperature information with a preset temperature. , calculating the remaining mileage of the electric vehicle, controlling the speed of the motor according to the calculated remaining mileage, and correcting the speed to increase the accuracy of the motor speed control.

In addition, a calculation system is used to calculate the remaining mileage, and the calculation system uses a driver information acquisition unit that collects driver information and driving patterns, a vehicle data storage unit, and the driver information acquisition unit and the vehicle data storage unit. A basic remaining mileage calculation unit that calculates the basic remaining mileage of the vehicle, a driving information acquisition unit that collects road information and environmental information, and a basic remaining mileage calculation using the information obtained from the driving information acquisition unit using weights and algorithms. a correction unit to be applied to the vehicle, a final remaining mileage calculation unit that calculates the final remaining mileage of the vehicle using the correction unit and the basic remaining mileage calculation unit, an alarm unit that gives a step-by-step alarm to the driver according to the remaining mileage, and and a learning and information providing unit that collects, analyzes, and learns the information and provides driving pattern information suitable for the driver.

In addition, the vehicle data storage unit collects and stores information on battery capacity, motor driving current, motor driving speed, battery consumption current, and standard fuel economy. Information on temperature and altitude is obtained, but collected from traffic lights, road facilities, GPS, and surrounding vehicles, and the alarm unit alarms the driver in stages based on the calculated value of the final remaining mileage calculation unit, but displays, sound, vibration, and smell and the learning and information provision unit presents a driving pattern suitable for the driver according to the final remaining mileage step by step, and accordingly, when the driver is not driving, an additional alarm is issued, and when the remaining capacity of the battery is insufficient. , It is characterized in that the VCU or BMS determines whether the power consumed is directly related to driving, and if not directly related, the power supply is removed or reduced to reduce power consumption.

In addition, in order to calculate the remaining mileage, the driver information acquisition step of collecting electronic information and driving patterns, the vehicle data storage step, and the basic remaining mileage of the vehicle are calculated using the driver information and the vehicle data. Distance calculation step, driving information acquisition step of collecting road information and environment information, correction step of applying the information obtained in the driving information acquisition step to the basic residual mileage calculation step using weights and algorithms, the correction step and The final remaining mileage calculation step of calculating the final remaining mileage of the vehicle using the basic remaining mileage calculation step, an alarm step of giving a step-by-step alarm to the driver according to the remaining mileage, and collecting, analyzing, and learning the information to inform the driver. It is characterized in that it includes a learning and information providing step of providing suitable driving pattern information.

In addition, a communication step is further included, wherein the communication step provides road information to the driving information acquisition step by communicating with road facilities and surrounding vehicles, and the calculation result in the final remaining mileage calculation step is transmitted to a user's portable terminal or In the alarm step, the vehicle data storage step collects and stores information on battery capacity, motor driving current, motor driving speed, battery consumption current, and standard fuel economy, and the driving information acquisition step collects and stores information on road traffic It acquires information on conditions, signals, speed enforcement, gradients, temperatures, and altitudes, but is characterized by collecting it from traffic lights, road facilities, GPS, and surrounding vehicles.

In addition, the alarming step alarms the driver step by step based on the final remaining mileage calculation value, and alarms using a display, sound, vibration and smell, and in the learning and information providing step according to the final remaining mileage step by step. It presents a driving pattern suitable for the driver, and if the driver is not driving accordingly, an additional alarm is issued, and if the remaining capacity of the battery is insufficient, the VCU or BMS determines whether the power consumed is directly related to driving , characterized in that power consumption is reduced by removing or reducing the power supply when not directly related.

In addition, the step of controlling the speed of the motor controls turn-off of the motor or reduces the speed when the obtained temperature is higher than a preset temperature, and the step of correcting the speed includes distance information and actual distance information according to the calculation of the remaining distance. It is characterized in that the driving distance information is compared and reflected.

The integrated motor control method of an electric vehicle according to the present invention utilizes a remaining mileage calculating system to more accurately and efficiently integrate and control the motors of an electric vehicle.

1 is a flowchart of a motor integrated control method for an electric vehicle according to the present invention;
2 is a flowchart of a motor integrated control method according to a preferred embodiment of the present invention;
3 is a functional configuration diagram of an electric vehicle for explaining a preferred embodiment of the present invention;
4 is a block diagram of a system for calculating the remaining mileage of an electric vehicle for explaining a preferred embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a motor integrated control method of an electric vehicle according to an embodiment of the present invention will be described in detail so that those skilled in the art can easily implement it. The present invention is not limited to the embodiments described herein and may be embodied in many different forms. In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

An integrated motor control method for an electric vehicle according to the present invention includes acquiring temperature information of one or more of a driving motor, an EWP motor, and a compressor motor (S10), comparing the acquired temperature information with a preset temperature to determine the speed of the motor. Controlling (S20, S30), calculating the remaining mileage of the electric vehicle (S40), controlling the speed of the motor according to the calculated remaining mileage (S50), and accuracy of the motor speed control It includes a speed correction step (S60) to increase.

That is, the temperature information of each motor is compared with a preset value, but the speed of the motor is controlled according to the comparison result. Through this, efficient and integrated control of the motor is possible. Of course, accuracy can be increased by using other information together with the temperature information of the motor.

For example, if information such as current value, generated resistance or load value, sound or generated sound is acquired and combined with the above temperature information, the motor of the electric vehicle can be more accurately and efficiently controlled.

The present invention intends to use DTE calculation information of an electric vehicle for more accurate control in addition to using the above-described temperature information. That is, the integrated control of the motor is performed by actively controlling the speed of the motor based on the calculated residual distance information.

To this end, the integrated motor control method according to the present invention uses a residual distance calculation system, and the calculation system includes a driver information acquisition unit 100 that collects driver information and driving patterns, a vehicle data storage unit 200, and the driver information acquisition system. In the basic remaining mileage calculation unit 300 that calculates the basic remaining mileage of the vehicle using the unit and the vehicle data storage unit, the driving information acquisition unit 400 that collects road information and environment information, and the driving information acquisition unit A correction unit 500 that applies the acquired information to a basic remaining mileage calculation unit using a weight and an algorithm, and a final remaining mileage calculation unit that calculates the final remaining mileage of the vehicle using the correction unit and the basic remaining mileage calculation unit. It includes a mileage calculation unit 600, an alarm unit 700 that gives a step-by-step alarm to the driver according to the remaining mileage, and a learning and information providing unit that collects, analyzes, and learns the information to provide driving pattern information suitable for the driver.

The vehicle data storage unit 200 collects and stores information on battery capacity, motor driving current, motor driving speed, battery consumption current, and standard fuel economy. Obtain information about slope, temperature, and altitude, but from traffic lights, road fixtures, GPS, and surrounding vehicles.

The alarm unit 700 alarms the driver step by step based on the calculated value of the final remaining mileage calculation unit, and alarms using a display, sound, vibration, and smell, and the learning and information according to the final remaining mileage step by step. The providing unit presents a driving pattern suitable for the driver, and if the driver does not drive accordingly, an additional alarm is issued.

In addition, in some cases, when the remaining capacity of the battery is insufficient, the VCU or BMS determines whether the power consumed is directly related to driving, and if not directly related, the power supply is removed or reduced to reduce power consumption.

In addition, the motor integrated control method according to the present invention uses the remaining distance calculation method (S40), and in order to calculate the remaining mileage, the driver information acquisition step (S100) of collecting electronic information and driving patterns, and the vehicle data storage step (S100) S200), and a basic remaining mileage calculating step (S300) of calculating a basic remaining mileage of the vehicle using the driver information and the vehicle data.

In addition, a driving information acquisition step of collecting road information and environmental information (S400), a correction step of applying the information acquired in the driving information acquisition step to a basic remaining mileage calculation step using weights and algorithms (S500), A final remaining mileage calculation step (S600) of calculating the final remaining mileage of the vehicle using the correction step and the basic remaining mileage calculation step (S600), an alarm step (S700) of giving a step-by-step alarm to the driver according to the remaining mileage, and A learning and information providing step (S800) of collecting, analyzing, and learning information to provide driving pattern information suitable for the driver is included.

In addition, a communication step is further included, wherein the communication step provides road information to the driving information acquisition step by communicating with road facilities and surrounding vehicles, and the calculation result in the final remaining mileage calculation step is transmitted to a user's portable terminal or The alarm step is provided in a keg.

The vehicle data storage step collects and stores information on battery capacity, motor driving current, motor driving speed, battery consumption current, and standard fuel economy. Obtain information about temperature and altitude, but collect it from traffic lights, road fixtures, GPS, and surrounding vehicles.

In the alarming step (S700), the driver is alarmed step by step based on the final remaining mileage calculation value, and the alarm is made using a display, sound, vibration, and smell, and the learning and information providing steps are performed according to the final remaining mileage. presents a driving pattern suitable for the driver.

Accordingly, if the driver is not driving, an additional alarm is issued, and if the remaining capacity of the battery is insufficient, the VCU or BMS determines whether the power consumed is directly related to driving, and if it is not directly related, the power supply is removed. or reduce power consumption.

The step of controlling the speed of the motor (S30) controls turn-off of the motor or reduces the speed when the obtained temperature is higher than the preset temperature, and the speed correction step (S60) is performed according to the calculation of the remaining distance. The distance information is compared with the actual distance information and reflected.

3 is a block diagram illustrating a DTE (Distance To Empty) control system of a general electric vehicle. The electric vehicle basically includes a vehicle control unit (VCU), a battery management system (BMS), a motor control unit (MCU), and a SOC. (State Of Charge) and the like are provided.

As described above, most of the conventional DTE calculation systems simply estimate the remaining mileage based on the average mileage without considering various variables and factors, so they do not calculate the accurate remaining mileage and do not properly provide the necessary information to the driver. there is

Accordingly, the system 1 for calculating the remaining mileage of an electric vehicle used in the present invention includes a driver information acquisition unit 100 that collects driver information and driving patterns, a vehicle data storage unit 200, and the driver information acquisition unit 100. and a basic remaining mileage calculator 300 that calculates a basic remaining mileage of the vehicle using the vehicle data storage unit 200 .

The driver information acquisition unit 100 receives various driver's control signals including driving manipulation signals, and includes various information for estimating a possible driving distance including information calculated and generated according to the control signals. Depending on the case, the driver information acquisition unit 100 may be a device including a touch screen capable of key input, or an input unit and an output unit may be separately configured.

In addition, the driver information acquisition unit 100 may receive, set, and store the condition state of the seat for each driver, and may determine the driver based on the input seat arrangement state change signal, and a separate arrangement state change signal If not entered, it is determined as the last boarding driver.

The vehicle data storage unit 200 stores various information related to the vehicle, and in particular, stores and calculates state of charge (SOC) information of the battery. At this time, the remaining capacity becomes the remaining capacity (State of Charge: SOC) input from the battery management system (BMS), and may be the State of Health (SOH) in some cases.

The basic remaining mileage calculation unit 300 calculates vehicle information such as remaining battery capacity information stored in the vehicle data storage unit 200 and information such as driver driving pattern information obtained in the driver information acquisition unit 100. It is used to calculate the basic mileage.

In addition, the system 1 for calculating the remaining mileage of an electric vehicle used in the present invention includes a driving information acquisition unit 400 that collects road information and environmental information, and the information obtained from the driving information acquisition unit 400 is used as a weight and algorithm. The correction unit 500 applied to the basic remaining mileage calculation unit 300 by using, and the final remaining mileage of the vehicle is calculated using the correction unit 500 and the basic remaining mileage calculation unit 300. It further includes a final remaining mileage calculation unit 600 that does.

The driving information acquisition unit 400 uses a GPS, an altitude sensor, and an electronic map device having a navigation function, and based on the GPS signal, information such as location, altitude, inclination, distance on the map, etc. Driving information including information such as vehicle average speed and real-time traffic information may be generated. In order to obtain such information, information may be provided from communication with nearby vehicles or from road facilities or traffic-related information devices (speed enforcement devices, traffic lights, etc.).

The correction unit 500 may correct and reflect the road or environment information acquired from the driving information obtaining unit 400 through weights and algorithms. For example, if the constant for the condition of the road surface of a general asphalt road is 1, the constant for the condition of the road surface can be set to 0.5 if the road surface is inhomogeneous such as a mountain road, and if the temperature is too high and cooling is required, the corresponding power Since consumption occurs, if the constant for air conditioning without cooling is 1, the constant for cooling can be set to 0.5.

In addition, if the slope is high using GPS, the index can be calculated by reflecting it, and when the vehicle needs to stop frequently by receiving traffic information and signal information on the road or when the number of vehicle stops is small, such as on a highway It is possible to differentially set the constant value of .

Of course, when it is difficult to predict, for example, in case of congestion due to an accident or traffic congestion, it is difficult to calculate it easily, so the driver may directly input it, and the driver may select such arithmetic method, sequence, and algorithm in advance.

Also, in some cases, the correction unit 500 may detect issues such as sudden acceleration and sudden stop occurring more than a predetermined number of times through the driver's driving pattern information obtained through the driver information acquisition unit 100, or obtain the driving information. When information on steep slopes and steep descents of the road occurs more than a predetermined number of times through the unit 400, it is determined that a correction is required, and the drivable distance can be corrected based on the driving pattern information and driving information.

At this time, the correction unit 500 may gradually correct the mileage to prevent driver's confusion when rapid mileage correction is required. Meanwhile, the correction unit 500 may correct the possible driving distance using only driver's driving pattern information when a destination has not been specified.

In addition, the remaining mileage calculation system 1 of the electric vehicle used in the present invention includes an alarm unit 700 that gives a step-by-step alarm to the driver according to the remaining mileage, and driving pattern information suitable for the driver by collecting, analyzing, and learning the information. It further includes a learning and information providing unit 800 and a communication unit 900 that provide.

The communication unit 900 provides road information to the driving information acquisition unit 400 by communicating with road facilities and surrounding vehicles, and the calculation result of the final remaining mileage calculating unit 600 is transmitted to the user's portable terminal or the alarm. It can be provided to the unit 700.

The vehicle data storage unit 200 collects and stores information about battery capacity, motor driving current, motor driving speed, battery consumption current, and standard fuel economy, and can obtain and store information by manual input by a driver if necessary.

The driving information acquisition unit 400 obtains information on road traffic conditions, signals, speed enforcement, gradients, temperatures, and altitudes, and may collect information from traffic lights, road facilities, GPS, and surrounding vehicles.

The alarm unit 700 alarms the driver step by step based on the calculated value of the final remaining mileage calculation unit 600, and may use a display, sound, vibration, and smell to give an alarm. In other words, it can be displayed on the screen of the cluster, or the volume through the speaker, the vibration of the seat or steering wheel, and additional air fresheners or smells can be used.

In addition, according to the final remaining mileage for each stage, the learning and information provision unit 800 presents a driving pattern suitable for the driver, and accordingly, when the driver does not drive, an additional alarm may proceed. Of course, by making the intensity of the additional alarm higher than that of the initial alarm, the driver's alertness may be increased.

In addition, when the remaining capacity of the battery is insufficient, it is determined whether the power consumed by the VCU or the BMS is directly related to driving, and if not directly related, power supply can be removed or reduced to reduce power consumption.

For example, it is possible to remove or reduce the intensity of cooling and heating related to an indoor air conditioner, and it is also possible to reduce power supplied to headlights or various light bulbs. Through this, it is possible to increase efficiency by concentrating power only on driving.

The present invention described above is not limited by the foregoing embodiments and accompanying drawings, and simple substitutions, modifications, and changes within the technical spirit of the present invention will be apparent to those skilled in the art.

The motor integrated control method of an electric vehicle according to the present invention calculates an accurate remaining mileage by reflecting various variables and factors, and can be used for an efficient and accurate motor integrated control method using this.

S10: Obtain motor temperature information
S20: Comparison with preset temperature
S30: Motor speed control according to temperature comparison
S40: Remaining Distance Calculation
S50: Motor speed control according to remaining distance
S60: motor speed control correction
1: remaining mileage calculation system 100: driver information acquisition unit
200: vehicle data storage unit 300: basic remaining mileage calculation unit
400: driving information acquisition unit 500: correction unit
600: final remaining mileage calculation unit 700: alarm unit
800: Learning and information provision department 900: Communication department

Claims (7)

In the motor integrated control method of an electric vehicle,
Acquiring temperature information of one or more of a driving motor, an EWP motor, and a compressor motor;
controlling the speed of the motor by comparing the acquired temperature information with a preset temperature;
calculating a remaining mileage of the electric vehicle;
controlling the speed of the motor according to the calculated remaining travel distance; and
a speed correction step for increasing the accuracy of the motor speed control; Including,
A calculation system is used to calculate the remaining mileage, and the calculation system uses a driver information acquisition unit that collects driver information and driving patterns, a vehicle data storage unit, and the driver information acquisition unit and the vehicle data storage unit. A basic remaining mileage calculation unit that calculates the basic remaining mileage, a driving information acquisition unit that collects road information and environmental information, and a basic remaining mileage calculation unit using the information obtained from the driving information acquisition unit by using weights and algorithms. A correction unit to be applied, a final remaining mileage calculation unit that calculates the final remaining mileage of the vehicle using the correction unit and the basic remaining mileage calculation unit, an alarm unit that gives a step-by-step alarm to the driver according to the remaining mileage, and the above information Includes a learning and information providing unit that collects, analyzes, and learns to provide driving pattern information suitable for the driver,
The vehicle data storage unit collects and stores information on battery capacity, motor driving current, motor driving speed, battery consumption current, and standard fuel economy. Information on altitude is acquired, but collected from traffic lights, road facilities, GPS, and surrounding vehicles, and the alarm unit alarms the driver in stages based on the calculated value of the final remaining mileage calculation unit, using display, sound, vibration, and smell. According to the final remaining mileage for each step, the learning and information providing unit presents a driving pattern suitable for the driver, and accordingly, when the driver is not driving, an additional alarm is issued, and when the remaining capacity of the battery is insufficient, the VCU Alternatively, a motor integrated control method of an electric vehicle, characterized in that the BMS determines whether the power consumed is directly related to driving, and if not directly related, removes or reduces power supply to reduce power consumption.
delete delete According to claim 1,
In order to calculate the remaining mileage, the driver information acquisition step of collecting electronic information and driving patterns, the vehicle data storage step, and the basic remaining mileage calculation of the vehicle using the driver information and the vehicle data are calculated. a driving information acquisition step of collecting road information and environmental information; a correction step of applying the information obtained in the driving information acquisition step to a basic residual mileage calculation step using weights and algorithms; the correction step and the basic The final remaining mileage calculation step of calculating the final remaining mileage of the vehicle using the remaining mileage calculation step, the alarm step of giving a step-by-step alarm to the driver according to the remaining mileage, and driving suitable for the driver by collecting, analyzing, and learning the above information An integrated motor control method for an electric vehicle, comprising learning and information providing steps of providing pattern information.
According to claim 4,
It further includes a communication step, wherein the communication step provides road information to the driving information acquisition step by communicating with road facilities and surrounding vehicles, and the calculation result in the final remaining mileage calculation step is transmitted to a user's portable terminal or the alarm. The vehicle data storage step collects and stores information on battery capacity, motor driving current, motor driving speed, battery consumption current, and standard fuel economy, and the driving information acquisition step includes traffic conditions on the road, An integrated motor control method for an electric vehicle, wherein information on signals, speed enforcement, gradients, temperatures, and altitudes is acquired from traffic lights, road facilities, GPS, and surrounding vehicles.
According to claim 4,
In the alarming step, the driver is notified in stages based on the final remaining mileage calculation value, the alarm is made using a display, sound, vibration, and smell, and the learning and information provision step is performed to the driver according to the final remaining mileage. Suggests an appropriate driving pattern, and if the driver is not driving accordingly, an additional alarm is issued, and if the remaining capacity of the battery is insufficient, the VCU or BMS determines whether the power consumed is directly related to driving, and directly A motor integrated control method for an electric vehicle, characterized in that reducing power consumption by removing or reducing the power supply when it is not relevant.
According to claim 1,
The step of controlling the speed of the motor controls turning off or reduces the speed of the motor when the obtained temperature is higher than a preset temperature, and the step of correcting the speed includes the distance information according to the calculation of the remaining mileage and actual driving. A motor integrated control method for an electric vehicle, characterized in that the distance information is compared and reflected.

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