KR20190031778A - Apparatus and method for controlling motor of variable charge motion actuator - Google Patents

Abstract

The present invention relates to an apparatus and a method for controlling a motor of a variable charge motion actuator, including a control unit controlling the motor of the variable charge motion actuator; and a plate connected to the motor and changed to an open state or a closed state with respect to an intake manifold as a result of rotation of the motor. The control unit drives the motor in a direction corresponding to one of the states so as to change the plate into the open or closed state. When the plate starts to move in the direction corresponding to the one of the states through the driving of the motor, it is detected whether the plate reaches the starting point of the soft landing zone set at a point ahead of the mechanical end position in the direction corresponding to the state of each plate. Soft landing control is performed on the motor from the starting point of the preset soft landing zone to the end point of plate movement completion. As a result, the plate is moved slower than at ahead of the starting point of the soft landing zone.

Description

TECHNICAL FIELD [0001] The present invention relates to a variable-charge-motion-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for controlling a motor of a variable charge motion actuator and, more particularly, to a variable charge motion actuator for preventing a mechanical hard stop at a mechanical end position of the variable charge motion actuator. To an apparatus and method for controlling a motor of an actuator.

Generally, the engine is equipped with a variable charge-motion actuator (VCMA) to increase the air flow in the intake manifold. The valve of the variable charge-motion actuator (VCMA) is opened / closed OPEN / CLOSE state to obtain desired air flow.

In addition, in a conventional variable charge motion actuator (VCMA) system, a variable charge motion actuator (VCMA) is used to prevent a mechanical hard stop in a mechanical end position (i.e., an open / close position) ) Is limited to less than a pre-set value for the motor control of PWM (Pulse Width Modulation).

However, even if the PWM (Pulse Width Modulation) value is limited to a predetermined value or less as described above, the moving speed of the plate of the variable charge motion actuator (VCMA) does not easily decrease below the desired specific value due to the inertia of the motor There is a problem. Accordingly, in order to reduce the moving speed of the plate to a desired value or less, it is necessary to start the soft landing control from a position far away from the actual mechanical end position, So that it is possible to obtain the landing speed only.

For example, when it is desired to adjust the moving speed of the plate to be within 50 (deg / sec) from the point of entering within 5 degrees from the mechanical end position, in the conventional soft landing method, Even if the PWM value for the motor control of the motion actuator VCMA is instantaneously limited, the moving speed of the plate exceeds 50 (deg / sec) due to the inertia of the motor moving, A mechanical hard stop still occurs at a mechanical end position, which may lead to component breakage.

Therefore, there is a need for a method of controlling the motor so that a mechanical hard stop does not occur at the mechanical end position of the variable charge motion actuator (VCMA).

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2003-0067856 (published on Aug. 19, 2003, a variable charge motion valve control apparatus of a gasoline direct injection engine and a control method thereof).

According to an aspect of the present invention, the present invention is made to solve the above-mentioned problems, and it is an object of the present invention to provide a variable charge motion actuator capable of preventing a mechanical hard stop at a mechanical end position, And to provide a motor control device and method for a charge-motion actuator.

According to an aspect of the present invention, a motor control apparatus for a variable charge motion actuator includes: a control unit for controlling a motor of a variable charge motion actuator; And a plate which is connected to the motor and changes to an open state or a closed state with respect to the intake manifold according to the rotation of the motor and wherein the control unit controls the opening / The motor is driven in a direction corresponding to the one of the states to change to the CLOSE state, and when the plate starts to move in the direction corresponding to the one state through the driving of the motor, Detecting whether or not the plate reaches a starting point of a soft landing area set at a point earlier than a mechanical end position in a direction corresponding to a state of each plate; Performing soft landing control on the motor up to an end point where the movement is completed, Characterized in that the rate at which the soft landing zone starting point moves slower than the former.

A motor control method for a variable charge motion actuator according to an aspect of the present invention is a method for controlling a motor of a variable charge motion actuator by a control unit to change a plate connected to the motor into an open state or a close state Driving the motor in a direction corresponding to any one of the states; When the plate starts to move in the direction corresponding to any one of the states through the driving of the motor, the control unit is set at a position before the mechanical end position in the direction corresponding to the state of each plate Detecting whether the plate reaches the starting point of the soft landing zone; And the control unit performs a soft landing control on the motor from a start point of the predetermined soft landing area to an end point of the movement of the plate so that the plate is moved more slowly than before the start point of the soft landing area The method comprising the steps of:

According to an aspect of the present invention, a mechanical hard stop is prevented at a mechanical end position of a variable charge-motion actuator, thereby preventing a mechanical damage caused by a mechanical hard stop .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary diagram showing a schematic configuration of a motor control apparatus for a variable charge motion actuator according to an embodiment of the present invention; FIG.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a variable-
FIG. 3 is an exemplary view for explaining a mechanical end position and an OPEN / CLOSE position in FIG. 1; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a motor control apparatus and method for a variable charge motion actuator according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

In accordance with the present embodiment, the variable charge motion actuator VCMA is used to increase the air flow at the intake manifold as described above. Depending on the operating conditions of the engine, the variable charge motion actuator VCMA Plate is opened / closed (OPEN / CLOSE) to obtain desired air flow.

Therefore, when the OPEN / CLOSE state of the plate is changed according to the operation condition of the engine, the plate of the variable charge motion actuator VCMA is controlled at a high speed to obtain a desired air flow, .

For example, when changing the OPEN / CLOSE state of the plate, the response time is fast within 150 ms.

Therefore, when controlling the motor of the variable charge motion actuator (VCMA), the position of the plate is controlled by applying a PWM signal to move the plate at a high speed.

In this embodiment, the position control of the motor means to control the angle of the motor in accordance with the rotation of the motor. In fact, the position of the plate (or the opening / closing state of the motor) Are controlled in conjunction with each other. Therefore, in the following description, two terms (for example, position control of the motor and position control of the plate) may be mixedly described for the sake of convenience.

On the other hand, when the position control of the plate of the variable charge motion actuator (VCMA) is performed at a high speed as described above, the mechanical hardness is increased in the vicinity of the mechanical end position (that is, If the soft landing control for preventing a stop (mechanical hard stop) is not smooth, the endurance of the parts is adversely affected.

Accordingly, the soft landing control should be performed only in the vicinity of the mechanical end position, and the state of the plate should be changed rapidly. However, the position control of the motor of the variable charge motion actuator (VCMA) A method of limiting the PWM value for the motor is to limit the PWM value from a point far before the mechanical end position to delay the operation speed of the plate, It is possible to overcome the inertia and achieve a desired low speed.

Accordingly, the present embodiment will be described below with respect to a method of performing motor control in consideration of the above-described contents in motor control of the variable charge motion actuator (VCMA).

It should be understood that a control unit (not shown) controls the operation of the motor in the variable charge motion actuator (VCMA) system according to the present embodiment, although it is not specifically shown in the drawings according to the present embodiment.

FIG. 1 is an exemplary diagram showing a schematic configuration of a motor control apparatus for a variable charge motion actuator according to an embodiment of the present invention. Referring to FIG.

1, the motor control apparatus for a variable charge motion actuator according to the present embodiment includes a control unit 110, a driving unit 120, an actuator 130, and a plate 140.

The variable charge motion actuator VCMA is mounted to increase the air flow at the intake manifold of the engine. The controller 110 controls the actuator 130 (e.g., a motor) (OPEN / CLOSE) state of the plate (or flap) 140 connected to the actuator 130 by controlling the control (e.g., controlling the rotational direction and the rotational speed).

That is, the controller 110 controls the actuator 130 (e.g., a motor) connected to the plate 140 to a driving unit (not shown) to control the open / close state of the plate (or flap) 120).

The control unit 110 controls the rotation direction (or driving direction) of the actuator 130 (e.g., motor) to control the open / close state of the plate 140, The control unit 110 controls the rotational speed (or driving speed) of the actuator 130 (e.g., motor) in order to control the opening / closing speed of the actuator 130 (e.g.

Specific operations of the controller 110 will be described with reference to FIGS. 2 and 3. FIG.

FIG. 2 is a view for explaining a motor control method of a variable charge-motion actuator according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a mechanical end position and an OPEN / CLOSE) position.

As shown in Figures 2 and 3, to the maximum mechanical end position in the manifold, i. E., To the mechanical open position (In-Mani MOP) and the mechanical close position (In-Mani MCP) However, when the plate is actually moved to the mechanical end position, mechanical damage may occur due to a mechanical hard stop, so that the electrical open position (EOP) Position to the electrical close position (ECP) (Electrical Close Position).

That is, there is a predetermined offset angle between the mechanical open position (In-Mani MOP) and the mechanical close position (In-Mani MCP) and between the electrical open position (EOP) and the electrical close position (ECP) (Offset Angle).

Therefore, the OPEN / CLOSE state (or position) of the plate is substantially changed between the two points (for example, ECP, EOP).

As shown in FIG. 2, it is assumed that the position corresponding to the electric close position (ECP) is the initial state of the motor (1) and that the motor starts its operation and moves to a position corresponding to the electric open position (EOP) .

At this time, the motor begins to move (i.e., starts rotating to change the plate state) (2) When the predetermined angle (e.g., 5 degrees) from the electric open position (EOP) (The starting point of the soft landing area), the control unit (not shown) starts soft landing control (3).

Although not specifically shown in the drawing, at least one sensor (e.g., an encoder, an infrared sensor, etc.) (not shown) or a physical switch (not shown) for detecting the rotational angle and position The control unit 110 may detect or calculate the rotation angle or position (or the position of the plate) of the motor based on the information detected through the at least one sensor or the physical switch .

Next, when the motor (4) that has reached the electric open position (EOP) through the soft landing control starts to operate in the opposite direction again (5) and moves to the position corresponding to the electric close position (ECP), the electric close position The control unit (not shown) starts the soft landing control at a time point (for example, 5 degrees) away from the ECP (i.e., the start point of the soft landing area).

In this embodiment, the soft landing control method (③, ⑥) is a method of limiting the PWM value for controlling the motor of the variable charge motion actuator (VCMA) (a method of controlling the current level applied to the motor) (I.e., the target position of the plate, or the position of the motor corresponding to the target position of the plate) for controlling the motor of the variable charge motion actuator (VCMA) Note that the method of slow adjustment (i.e., the method of increasing the time required to move the same position) is used.

More specifically, the present embodiment continues the motor position control method (for example, PID (Proportional Integral Differential) control) performed in the control areas (2, 5) other than the soft landing control areas (3, To control the position of the motor. Accordingly, in the control areas (2, 5) other than the soft landing control area (3, 6), the target set point (target set point) and the actual plate position The plate is controlled as fast as possible following the positional difference.

That is, in the control areas (2, 5) other than the soft landing control areas (3, 6), the controller (not shown) corresponds a target set point to a desired speed So that the actual position control of the motor can be quickly performed according to the characteristics of the conventional motor position control method (for example, PID control).

However, when the preset soft landing control area (i.e., the soft landing start point) becomes the preset soft landing control area, a change limitation is set in the target set point itself, (e.g., PID control) by slowing the speed of the motor to a low speed corresponding to another desired speed (e.g., relatively slow speed) in order to slow down the actual position control of the motor do.

Accordingly, unlike the conventional method, the current level applied to the motor remains the same, but the time for moving the position of the motor (or the position of the plate) is increased. In other words, when the current applied to the motor is reduced (that is, when the PWM value is limited), it is rather affected by the inertia. However, the inertia varies depending on whether the position of the plate (i.e., the position of the motor) is moved quickly or slowly. Thus, it is practically difficult to accurately control the time point (ie, the position of the plate or motor) to limit the PWM value by accurately reflecting the effect of this inertia.

However, in the present embodiment, the target set point (that is, the target position of the plate, or the target position of the plate) corresponding to the target position is not reduced (I.e., the position of the motor to be changed) is changed to be slower (i.e., changed more slowly than in the case of (2) and (5)), substantially the effect of inertia can be eliminated.

 In other words, the motor control method (that is, the soft landing control method) of the variable charge motion actuator VCMA according to the present embodiment uses the target set point (i.e., the target of the plate (I.e., the position of the motor corresponding to the target position of the plate) or the position of the motor corresponding to the target position of the plate) corresponding to the desired motor position control speed (i.e., the normal speed) (Relatively slower than the normal speed), it is possible to prevent a mechanical hard stop in a manner that substantially increases the time to reach the EOP or the ECP.

On the other hand, when the rate of change of the target set point is lowered in the motor control method (i.e., soft landing control method) of the variable charge motion actuator VCMA according to the present embodiment, (Eg, air flow rate of the intake manifold, engine speed, coolant temperature, system voltage, etc.) that can affect the actual motor position control during PID control by the target set point You can also set the speed.

In addition, the motor control method (i.e., the soft landing control method) of the variable charge motion actuator VCMA according to the present embodiment is applied not only in the preset soft landing area but also in the key off condition and the variable charge motion actuator The present invention can also be applied to a situation where the control of the variable charge motion actuator (VCMA) system is interrupted due to an error in the VCMA system.

Accordingly, the present embodiment can prevent a mechanical hard stop at the mechanical end position of the variable charge motion actuator, thereby preventing a component damage due to a mechanical hard stop It is effective.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, I will understand the point. Accordingly, the technical scope of the present invention should be defined by the following claims.

110:
120:
130: Actuator
140: Plate
EOP: Electrical Open Position
ECP: Electrical close position

Claims (12)

A control unit for controlling a motor of the variable charge motion actuator; And
And a plate connected to the motor and changed to an open state or a closed state with respect to the intake manifold according to the rotation of the motor,
Wherein the controller drives the motor in a direction corresponding to the one of the states to change the plate into an open state or a close state, Detects whether or not the plate reaches the starting point of the soft landing area set at a point before the mechanical end position in the direction corresponding to the state of each of the plates, Wherein the soft landing control is performed on the motor from a start point of the predetermined soft landing area to an end point where the plate is completely moved so that the plate is moved slower than before the start point of the soft landing area Motor control device of variable charge motion actuator.
2. The method of claim 1,
(EOP) or electrical closing position (ECP), which is set at a point earlier than the mechanical end position in the direction corresponding to each state of the plate, from the electrical open position (EOP) EOP) and an electric close position (ECP) of the variable charge motion actuator.
The apparatus of claim 1,
And performs soft landing control for adjusting the change of the target set value for motor control of the variable charge motion actuator to be relatively slower than in the previous area at the point where the soft landing area starts. controller.
The method of claim 3,
The target set value
Means the position or rotation angle of the motor corresponding to the target position of the plate or the target position of the plate,
The control method for slowing the change of the target set value,
Wherein the time required to move the plate to the same target position is further increased than before the point at which the soft landing area starts.
The apparatus of claim 1,
In the control of the motor according to a PID (Proportional Integral Differential) method, when the soft landing start point is preset, the soft landing control is performed to change the target set value to correspond to a slower speed than a point at which the soft landing area starts, And the motor control device of the variable charge-motion actuator.
The apparatus of claim 1,
In the soft landing area, the target set value is changed relatively slowly so as to reach the electric open position (EOP) or the electric close position (ECP) in consideration of the speed of changing the target set value in the remaining area except the soft landing area Wherein the control unit performs soft landing control to prevent a mechanical hard stop of the plate by increasing a time required for the motor to move.
Driving the motor in a direction corresponding to the one of the states to control the motor of the variable charge motion actuator to change the plate connected to the motor to an open state or a close state, ;
When the plate starts to move in the direction corresponding to any one of the states through the driving of the motor, the control unit is set at a position before the mechanical end position in the direction corresponding to the state of each plate Detecting whether the plate reaches the starting point of the soft landing zone; And
The control unit performs a soft landing control on the motor from a start point of the predetermined soft landing area to an end point where the plate is completely moved to move the plate more slowly than before the start point of the soft landing area Wherein the variable charge-motion actuator comprises a motor.
8. The method of claim 7,
(EOP) or electrical closing position (ECP), which is set at a point earlier than the mechanical end position in the direction corresponding to each state of the plate, from the electrical open position (EOP) EOP) or an electric close position (ECP) of the variable charge motion actuator.
8. The method of claim 7, wherein the soft landing control comprises:
Wherein a change of a target set value for motor control of the variable charge motion actuator is controlled in a manner that is relatively slower than in a previous region at a point where a soft landing area starts.
10. The method of claim 9,
The target set value
Means the position or rotation angle of the motor corresponding to the target position of the plate or the target position of the plate,
The control method for slowing the change of the target set value,
Wherein the time required to move the plate to the same target position is increased more than before the point at which the soft landing area starts.
8. The method of claim 7, wherein the soft landing control comprises:
When the control unit controls the motor by a PID (Proportional Integral Differential) method, when the preset soft landing start point is reached, the target setting value is changed in correspondence to a slower speed than a point at which the soft landing area starts Wherein the control method is a control method.
8. The method of claim 7, wherein the soft landing control comprises:
In the soft landing area, the target set value is changed relatively slowly so as to reach the electric open position (EOP) or the electric close position (ECP) in consideration of the speed of changing the target set value in the remaining area except the soft landing area To prevent a mechanical hard stop of the plate by increasing the time required for the variable charge motion actuator.

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