KR101374876B1 - Electronic transmission system and method for controlling transmission of the same - Google Patents

Abstract

The present invention relates to an electronic transmission system and a control method thereof, which can increase a driving range by controlling a current to be supplied to a single or dual winding part in accordance with driving conditions of a vehicle without a mechanical transmission.
According to an embodiment of the present invention, a drive motor having first and second windings, an inverter for converting a voltage according to the characteristics of the drive motor, and the first winding or the first and second windings And a control unit configured to switch to be connected to the control unit, and a control unit controlling the transmission unit to supply current to the first winding unit or the first and second winding units according to a driving condition of the vehicle. do.

Description

ELECTRONIC TRANSMISSION SYSTEM AND METHOD FOR CONTROLLING TRANSMISSION OF THE SAME

The present invention relates to an electronic shifting system and a control method thereof, and more particularly, to an electronic shifting system capable of increasing a driving range by controlling a current to be supplied to a single or dual windings in accordance with driving conditions of a vehicle without a mechanical transmission. It relates to a control method thereof.

Recently, global environmental problems have become a global concern, and environmental regulations have been strengthened especially in developed countries. Especially, exhaust gas regulations related to automobiles and fuel efficiency regulations have been expanded.

Accordingly, interest has been drawn to the next generation of cars that are low in noise and do not emit any exhaust gas. Electric cars use electricity as a fuel, unlike gasoline engines, and thus, batteries are used as a power source. Since there are no pollution-free vehicles, it has been in the spotlight recently.

A driving apparatus using a driving motor, including a conventional electric vehicle, requires high torque operation for acceleration and securing climbing capability and high speed operation for high speed driving.

Referring to FIG. 1, in the conventional electric vehicle driving apparatus, the voltage of the battery 13 is supplied to the inverter 11, and the inverter 11 is controlled by the characteristics of the driving motor 12 under the control of a controller (not shown). The voltage is converted so as to be applied to the driving motor 12. The drive motor 12 is driven according to the voltage applied from the inverter 11.

However, the conventional electric motor drive motor 12 is made of a single winding 121, has a condition that cannot satisfy both high torque and high speed type, and has a limitation in the speed range at high speeds. That is, the conventional electric motor driving motor 12 is manufactured in a high torque type and can be driven in a high speed region through field weakening control, and thus can be widened through field weakening control as shown in the graph shown in FIG. 2. Not only are there speed limits, but there are also factors that make fuel economy worse.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic shifting system and a control method thereof, by which a driving range can be increased by controlling a current to be supplied to a single or dual winding part in accordance with driving conditions of a vehicle without a mechanical transmission.

According to an embodiment of the present invention for achieving the above object, a drive motor having a first and second windings, an inverter for converting a voltage in accordance with the characteristics of the drive motor, and the first winding or the first A shifting unit switching to be connected to the first and second winding units, and a control unit controlling the shift unit to supply current to the first winding unit or the first and second winding units according to a driving condition of the vehicle. It provides an electronic shift system.

The transmission part may be connected between the first winding part and the second winding part, and may be connected to a first switching part that is turned on to supply current to the first winding part under control of the controller, and the other end of the second winding part. And a second switching unit connected to and turned on to supply current to the first and second windings under control of the controller.

The driving condition of the vehicle is measured by a first condition in which a torque corresponding to a current flowing in the driving motor measured from a current sensor installed between the driving motor and the inverter exceeds a predetermined torque, and measured by a position sensor installed in the driving motor. And a second condition in which a speed based on a position exceeds a predetermined speed, and the controller turns off the first switching unit and turns on the second switching unit when the first condition is satisfied. It is preferable to control to supply current to both of the windings, and to supply current to the first winding by turning on the first switching unit and turning off the second switching unit when the second condition is satisfied. .

The driving condition of the vehicle includes a third condition in which the torque measured from the torque sensor installed in the vehicle exceeds a predetermined torque, and a fourth condition in which the vehicle speed measured from the vehicle speed sensor installed in the vehicle exceeds a certain speed, The controller controls to supply current to both the first and second windings by turning off the first switching unit and turning on the second switching unit when the third condition is satisfied, and satisfying the fourth condition. In this case, the first switching unit is turned on and the second switching unit is turned off to control the supply of current to the first winding unit.

Preferably, the first and second windings have the same turns ratio.

In addition, according to another embodiment of the present invention, a drive motor having a first and second windings, an inverter for converting a voltage in accordance with the characteristics of the drive motor, the first winding or the first and second windings A control method of an electronic shifting system comprising a shifting unit switching to be connected to a unit, and a control unit controlling the shifting unit according to a driving condition of a vehicle, wherein the control unit receives torque and speed while driving the vehicle. ; Determining, by the controller, whether the received torque exceeds a certain torque or whether the received speed exceeds a certain speed; The control unit applies a control signal to the transmission unit to supply current to the first and second windings when the torque exceeds a predetermined torque, and the first winding when the speed exceeds a predetermined speed. Applying a control signal to the transmission unit to supply a current to the unit; And controlling, by the control unit, the first and second switching units of the transmission unit to switch current according to the applied control signal to supply current to the first winding unit or the first and second winding units. A control method of an electronic shift system is provided.

According to the present invention, it is possible to increase the driving range as well as to improve fuel efficiency by controlling the electric current to be supplied to the single or double windings in accordance with the driving conditions of the vehicle without a mechanical transmission.

1 is a schematic diagram for explaining a driving apparatus using a conventional electric motor.
2 is a graph showing the performance of the drive device shown in FIG.
3 is a block diagram illustrating an electronic shift system according to an embodiment of the present invention;
4 is a schematic view showing the electronic shift system shown in FIG.
5 is a graph showing the performance of the electronic shift system shown in FIG.
6 is an operation flowchart for explaining a control method of the electronic shift system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a block diagram illustrating an electronic shift system according to an exemplary embodiment of the present invention, and FIG. 4 is a schematic view showing the electronic shift system shown in FIG. 3.

Referring to FIG. 3, the electronic shift system 2 according to the embodiment of the present invention includes a battery 21, a controller 22, an inverter 23, a driving motor 24, and a transmission 25. Can be.

The voltage of the battery 21 is supplied to the inverter 23. The inverter 23 converts the voltage according to the characteristics of the driving motor 24 to apply the converted voltage to the driving motor 24. In other words, the inverter 23 transforms the voltage of the battery 21 into three phases and applies it to the driving motor 24. In this embodiment, the drive motor 24 is used as a three-phase motor, but is not necessarily limited thereto.

The controller 22 grasps the driving situation of the vehicle and controls the operation of the driving motor 24 using various logics mounted thereon. The drive motor 24 generates power based on the control signal of the controller 22.

The driving motor 24 has a double winding part and is connected to a single or double winding part according to the switching of the transmission part 25 to satisfy both high torque and high speed driving conditions. At this time, the transmission unit 25 performs a switching operation corresponding to the driving conditions of the vehicle under the control of the controller 22.

Referring to FIG. 4, the driving motor 24 includes a first winding part 241 and a second winding part 242, and the winding ratios of the first and second winding parts 241 and 242 are the same.

The transmission part 25 is installed between the inverter 23 and the driving motor 24 and connected to a single first winding part 241 or a double first winding part 241 and a second winding part 242. Switch as much as possible.

That is, the transmission part 25 may be switched to be connected to the first winding part 241 or to be connected to both the first and second winding parts 241 and 242 under the control of the controller 22.

The shifting part 25 may include a first switching part S1 connected between the first winding part 241 and the second winding part 242, and a second switching part connected to the other side of the second winding part 242. (S2).

As the first and second switching units S1 and S2, a field effect transistor (FET), an insulated gate bipolar transistor (IGBT), or the like may be used.

The controller 22 may control the first and second switching units S1 and S2 of the transmission part 25 according to the driving condition of the vehicle.

The driving condition of the vehicle may include a first condition in which a torque corresponding to a current measured from a current sensor (not shown) between the inverter 23 and the driving motor 24 exceeds a predetermined torque, and is provided in the driving motor 24. The second condition in which the speed based on the position measured from the measured position sensor (not shown) exceeds the constant speed, the third condition in which the torque measured from the torque sensor installed in the vehicle exceeds the constant torque, the vehicle speed sensor installed in the vehicle And a fourth condition in which the speed measured from exceeds a certain speed.

The controller 22 determines whether the first condition or the third condition described above is satisfied, and when the first condition or the third condition is satisfied, the controller 22 supplies current to both the first and second windings 241 and 242. Control signals are applied to turn off the first switching unit S1 and to turn on the second switching unit S2. In addition, the controller 21 determines whether the second condition or the fourth condition described above is satisfied, and when the second condition or the fourth condition is satisfied, the controller 21 supplies the current only to the first winding part 241. Control signals may be applied to turn on S1 and turn off the second switching unit S2 to solve the limitations in the speed range without a mechanical transmission as well as to improve fuel efficiency.

Reference numerals BD1 and BD2 are three-phase bridge diodes.

As shown in the graph shown in FIG. 5, unlike the graph of FIG. 2, the electronic shift system 2 according to the present invention can be driven at high speed. That is, in the case of high torque, the second switching unit S2 is turned on to supply current to the first and second windings 241 and 242 to generate power of the driving motor 24, and in the case of high speed, the first switching unit. The unit S1 is turned on to supply current to the first winding unit 241 to generate power of the driving motor 24, thereby satisfying both high torque and high speed driving conditions.

Referring to the control method of the electronic transmission system having such a configuration as follows.

6 is a flowchart illustrating a control method of the electronic shift system according to an exemplary embodiment of the present invention.

Referring to FIG. 6, the controller 22 receives a torque and a speed while driving the vehicle (S11). In this case, the torque may correspond to a current measured by a current sensor installed between the inverter 23 and the driving motor 24 or may be received from a torque sensor installed in the vehicle. The speed may be based on a position measured from a position sensor installed in the drive motor 24 or may be received from a vehicle speed sensor installed in the vehicle.

Next, the controller 22 determines whether the received torque exceeds a predetermined torque (S13).

As a result of the determination in step S13, when the received torque exceeds a predetermined torque, the controller 22 turns off the first switching unit S1 of the transmission unit 25 and turns on the second switching unit S2. The control signal is applied (S15).

Next, the control unit 22 controls to supply current to both the first and second windings 241 and 242 of the driving motor 24 according to the applied control signal (S17).

Accordingly, the drive motor 24 controls the first and second switching units S1 and S2 of the transmission unit 25 by the control unit 22 to generate power for high torque travel.

As a result of the determination in step S13, when the received torque does not exceed the predetermined torque, the controller 22 determines whether the received speed exceeds the predetermined speed (S14).

As a result of the determination in step S14, when the received speed exceeds a predetermined speed, the controller 22 turns on the first switching unit S1 of the transmission unit 25 and turns off the second switching unit S2. The control signal is applied (S16).

Next, the control unit 22 controls to supply a current to the first winding unit 241 of the driving motor 24 according to the applied control signal (S18). Accordingly, the drive motor 24 generates power suitable for high speed travel without a mechanical transmission.

By doing so, it is possible to control high speed and high speed by controlling a transmission part connected to the first winding part or the first and second winding parts according to the driving condition of the vehicle without a mechanical transmission.

The invention being thus described, it will be obvious that the same way may be varied in many ways. Such modifications are intended to be within the spirit and scope of the invention as defined by the appended claims.

2: electronic shifting system 21: battery
22: control unit 23: inverter
24: drive motor 25: transmission portion
241, 242: first and second windings
S1, S2: first and second switching unit

Claims (6)

A drive motor having first and second windings,
An inverter for converting a voltage according to the characteristics of the driving motor;
A transmission part switching to be connected to the first winding part or the first and second winding parts;
And a control unit controlling the transmission unit to supply current to the first winding unit or the first and second winding units according to a driving condition of a vehicle.
The transmission
A first switching part connected between the first winding part and the second winding part and turned on to supply current to the first winding part under control of the controller;
And a second switching part connected to the other end of the second winding part and turned on to supply current to the first and second winding parts under control of the controller. delete The method according to claim 1,
The driving condition of the vehicle is measured by a first condition in which a torque corresponding to a current flowing in the drive motor measured from a current sensor installed between the drive motor and the inverter exceeds a predetermined torque, and a position sensor installed in the drive motor. The velocity based on the position includes a second condition that exceeds a certain velocity,
When the first condition is satisfied, the controller turns off the first switching part and turns on the second switching part to control supply of current to both the first and second winding parts, and to satisfy the second condition. And turning on the first switching unit and turning off the second switching unit to supply current to the first winding unit. The method according to claim 1,
The driving condition of the vehicle includes a third condition in which the torque measured from the torque sensor installed in the vehicle exceeds a predetermined torque, and a fourth condition in which the vehicle speed measured from the vehicle speed sensor installed in the vehicle exceeds a certain speed,
The controller controls to supply current to both the first and second windings by turning off the first switching unit and turning on the second switching unit when the third condition is satisfied, and satisfying the fourth condition. And turning on the first switching unit and turning off the second switching unit to supply current to the first winding unit. A drive motor having first and second windings,
An inverter for converting a voltage according to the characteristics of the driving motor;
A shifting unit switching to be connected to the first and second windings;
And a control unit controlling the transmission unit to supply current to the first and second winding units in accordance with driving conditions of a vehicle.
And said first and second windings have the same turns ratio. A drive motor having first and second windings, an inverter for converting voltages according to the characteristics of the drive motor, a transmission for switching to be connected to the first winding or the first and second windings, A control method of an electronic shift system including a control unit for controlling the shift unit in accordance with a driving condition of a vehicle,
Receiving, by the controller, torque and speed while the vehicle is running;
Determining, by the controller, whether the received torque exceeds a certain torque or whether the received speed exceeds a certain speed;
The control unit applies a control signal to the transmission unit to supply current to the first and second windings when the torque exceeds a predetermined torque, and the first winding when the speed exceeds a predetermined speed. Applying a control signal to the transmission unit to supply a current to the unit; And
And controlling, by the control unit, the first and second switching units of the transmission unit to switch current according to the applied control signal to supply current to the first winding unit or the first and second winding units. How to control the shifting system.

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