KR101647649B1

KR101647649B1 - Control and method for controlling stepping motor driving disk member

Info

Publication number: KR101647649B1
Application number: KR1020090050699A
Authority: KR
Inventors: 가진성; 김종민; 이정환
Original assignee: 코웨이 주식회사
Priority date: 2009-06-08
Filing date: 2009-06-08
Publication date: 2016-08-11
Also published as: KR20100131877A

Abstract

The present invention relates to a stepping motor control apparatus for controlling the positions of upper and lower disk members having through holes, wherein the number of pulses applied to the stepping motor for driving the upper and lower disk members is measured, A position sensing unit for sensing whether the position of the disc member is a flow passage position where the through holes of the upper and lower disc members coincide with each other or a through hole of the upper disc member is a zero point position when the flow path of the lower disc member is blocked; And a stepping motor for rotating the stepping motor by applying a first predetermined number of pulses per second to the stepping motor from the zero point position to the flow passage position by receiving the position sensing signal from the position sensing unit, And a pulse control rotation unit for rotating the stepping motor by applying a second preset number of pulses to the stepping motor in a number greater than the first preset number of pulses per second to the zero point position. The stepping motor control apparatus comprising:

Flow path, disk member, stepping motor, torque, pulse

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a stepping motor control apparatus and a control method for driving a disc member,

The present invention relates to an apparatus and method for controlling a stepping motor that drives a disc member, and more particularly to an apparatus and method for controlling a stepping motor that drives a disc member that communicates or blocks a flow path to generate appropriate torque.

Recently, as environmental pollution increases, there are few homes or businesses that use raw water, and people who buy and eat drinking water at home are increasing. When a large amount of drinking water such as a restaurant is needed, a water purifier is frequently used due to economic burden.

Such a water purifier usually connects water supplied from a water pipe to a filter, and these filters are composed of a plurality of filters, and the supplied water passes through them to filter various foreign substances and heavy metals. The filtered water is stored in a low water pipe, and the user is configured to drink or use water by pushing the cup into an external dispenser.

With respect to the use of the conventional water purifier as described above, the stepping motor is operated in the process of driving the disk member rotating inside the flow path opening / closing valve when supplying raw water from the water purifier or the disk member inside the cleaning kit for cleaning the water purifier. At this time, the upper and lower disk members are rotated so as to slip with respect to each other, and the through holes are aligned to pass the flow path.

During operation of the stepping motor, the torque of the stepping motor varies depending on the external pressure or the degree of close contact between the upper and lower disk members. That is, when the torque of the upper disk member is too large, there is a fear that tension is generated and the zero point correction is not performed well. When the upper disk member is rotated to a predetermined position of the lower disk member, It may be too small.

Accordingly, there is a need for an apparatus and method that can generate appropriate torque when driving a stepping motor in accordance with the circumstances as described above.

A stepping motor for driving an upper disk member that communicates or blocks a flow path generates an appropriate torque so that the upper disk member is accurately stopped at the zero point position of the lower disk member and at the same time when the lower disk member is rotated to a predetermined position And it is an object of the present invention to provide an apparatus and a method capable of rotating without being influenced by an external pressure.

According to an aspect of the present invention, there is provided a stepping motor control apparatus for controlling positions of upper and lower disk members having through holes, the apparatus comprising: a stepping motor control unit for measuring the number of pulses applied to a stepping motor for driving the upper and lower disk members, A position sensing unit that senses whether a position of the upper and lower disk members is a passage position in which the through holes of the upper and lower disk members coincide with each other or a through hole of the upper disk member is a zero position when the passage of the lower disk member is blocked; And a controller for receiving the position sensing signal from the position sensing unit and applying a first predetermined number of pulses per second to the stepping motor from the zero point position to the flow passage position, A pulse control unit for applying a second preset number of pulses greater than a first preset number; And controlling the stepping motor by the first predetermined number to rotate the upper disk member from a zero position to a position where the through hole of the lower disk member exists, And a rotation control unit for controlling the stepping motor by the second predetermined number so as to rotate the upper disk member to the zero point position of the lower disk member until the stepping motor drives the disk member. Thereby providing a control device.

In one embodiment of the present invention, when the upper disk member is rotated to the predetermined position after passage of the flow channel, or when rotation of the upper disk member to the zero point position is completed after shutting off the flow path, And a pulse applied to the stepping motor is removed.

In another embodiment of the present invention, the stepping motor generates a greater torque when the flow path is opened than when the flow path is cut off.

According to another aspect of the present invention, there is provided a method of controlling an air conditioner, comprising the steps of: detecting that a through hole of an upper disk member is at a zero point position when a flow path of a lower disk member is blocked; The number of pulses per second applied to the stepping motor for driving the upper disk member from the zero point position to the flow passage position is controlled to be a first preset number so that the upper disk member is inserted into the through hole of the lower disk member, To a predetermined position; Detecting that the through-hole of the upper disc member is in a position where the through-hole is communicated with the lower disc member; And a number of pulses per second applied to the stepping motor from a position at which the upper disk member has the through hole of the lower disk member to a flow cutoff position at which the through holes of the upper and lower disk members are displaced from each other, And rotating the disk member to a zero point position of the lower disk member by controlling the number of the first set number to a second predetermined number.

In another embodiment of the present invention, when the upper disk member has been pivoted to the passage position having the through-hole, or when the upper disk member has been rotated to the zero position, a pulse applied to the stepping motor The stepping motor control method comprising the steps of:

In the stepping motor according to another embodiment of the present invention, a greater torque is generated when the flow path is blocked than when the flow path is cut off.

According to the present invention, the stepping motor that drives the upper disk member that communicates or blocks the flow path generates appropriate torque so that the upper disk member is accurately stopped at the zero point position of the lower disk member, So that it can be rotated without being influenced by external pressure.

In addition, according to the present invention, even when the upper disk member is accurately stopped at the zero point position and at the same time it is rotated to a predetermined position of the lower disk member, the upper disk member can be rotated without being influenced by external pressure, So that the raw water can pass through smoothly.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The shape and the size of the elements in the drawings may be exaggerated for clarity and the same elements are denoted by the same reference numerals in the drawings.

FIG. 1 is a perspective view of a flow path opening / closing valve provided with a stepping motor control device for driving a disk member of the present invention, and FIG. 2 is a schematic internal configuration diagram of FIG.

The main body 40 has therein a first flow path communicated with the raw water pipe 90 and a second flow path branched from the first flow path to one side.

The main body 40 has an inlet port 41 connected to the raw water pipe 90 at one side thereof and a first outlet port 42a connected to the first pipe 91 in a direction perpendicular thereto, And a second outlet port 42b connected to the second pipe 92 is formed on the other side opposite to the port 41. [

The first flow path connected from the inflow port 41 to the first outflow port 42a of the main body 40 is formed in an L shape and the second flow path connected from the inflow port 41 to the second outflow port 42b, It is preferable that the flow path is formed in the shape of a sphere.

The disc members 50 and 60 are stacked so as to be mutually rotatable to communicate or block the flow path of the main body 40 and are divided into an upper disc member 60 and a lower disc member 50.

The upper disk member 60 is formed with one through hole 61 and the lower disk member 50 is mounted at a point where the first flow path and the second flow path inside the main body 40 are branched. Hole 61 penetrating through the through-hole 61. The upper disk member 60 is rotated so that the through holes 51, 52, 53 and 54 of the upper disk member 60 are engaged with one of the through holes 51, 52, 53 and 54 of the lower disk member 50 The flow path is blocked when the through holes 61 of the upper disk member 60 are displaced from the through holes 51, 52, 53 and 54 of the lower disk member 50. As a result, These through holes 51, 52, 53, and 54 are formed by first through fourth through holes 51, 52, 53, and 54, and they are formed in a fan-shaped hole structure.

The disc members 50 and 60 are preferably made of a ceramic material because the ceramic material has an advantage of being superior in surface roughness, strength, and durability to rubber, which is a material of a door in the prior art to be.

Therefore, when the upper disk member 60 rotates at the upper portion of the lower disk member 50, the rotation operation is much smoother than the conventional opening / closing member, and the mutual close contact is excellent, so that high airtightness or watertightness can be maintained.

The upper disk member 60 is provided so as to be rotatably in close contact with one side of the lower disk member 50, preferably the upper surface of the lower disk member 50.

The upper disk member 60 is rotated by a stepping motor 100. [ The position sensing unit 200, the pulse control unit 300, and the rotation control unit 400 are connected to the stepping motor 100.

The position sensing unit 200 measures the number of pulses applied to the stepping motor 100 until the upper disk member 60 rotates on the lower disk member 50 and stops, It is detected whether the ball 61 is at the zero point when the flow path of the lower disk member 50 is blocked or at a predetermined position of the lower disk member 50. That is, the position sensing unit 200 measures the number of pulses generated by the stepping motor 100, multiplies the number of pulses by the rotation angle per one pulse, and determines whether the through hole of the upper disk member 60 is in the zero- It is possible to detect the position of the upper disk member 60 because the angle of rotation from the predetermined position of the upper disk member 50 can be obtained. Regarding the position sensing, since the through hole 61 of the upper disk member 60 is at the zero point position at the time of initial use, the position can be detected by measuring the number of pulses thereafter.

The pulse control unit 300 controls the number of pulses per second (PPS) applied to the stepping motor 100. The pulse control unit 300 controls the number of through holes 51, 52, 53, 54 of the upper and lower disk members 60, The control method is different when the flow path communicates through the flow path and when the flow path is shut off. That is, the pulse control unit 300 receives the position sensing signal from the position sensing unit 200 and controls the stepping motor 100 to drive the upper disk member 60 from the zero position to the oil passage position, The first predetermined number of pulses per second is applied to the stepping motor 100 until the upper disk member 60 is blocked from the flow passage position by the first predetermined number of pulses, . When the stepping motor 100 is controlled in this manner, a larger torque is generated at the time of flow communication than at the time of stopping the flow path.

When the upper disc member 60 has been rotated to a predetermined position after the upper disc member 60 has flowed or when the upper disc member 60 has been rotated to the zero point position after shutting off the flow path, (300) removes a pulse applied to the stepping motor (100).

The rotation control unit 400 controls the rotation of the stepping motor 100. When the flow path communicates through the through holes 51, 52, 53, and 54 of the upper and lower disk members 60 and 50, The control method is different. That is, the rotation control unit 400 controls the flow of the air from the flow passage blocking through the through holes 51, 52, 53, and 54 of the upper and lower disk members 60 and 50, The control unit controls the first predetermined number of stepping motors 100 to rotate the upper disc member 60 from the zero position to a predetermined position of the lower disc member 50 until the upper and lower disc members 60, The upper disk member 60 is rotated until it is positioned at the zero point position of the lower disk member 50 from the passage through the through holes 51, 52, 53, 54 of the lower disk member 50 Thereby controlling the stepping motor 100 in number.

The zero point position of the upper disk member 60 may be designed in various ways, but in the present invention, the zero point position is designed such that the through hole 61 of the upper disk member 60 is positioned as shown in FIG. That is, the through hole 61 of the upper disk member 60 is designed to coincide with the first through hole 51 of the lower disk member 50.

When the torque of the upper disk member 60 is corrected to be too large, there is a fear that tension is generated and the zero point correction is not performed well. When the upper disk member 60 is rotated to a predetermined position of the lower disk member 50 There is a possibility that the torque becomes too small because a large amount of external pressure is generated. In this state, appropriate torque is generated when the stepping motor 100 is driven in accordance with the zero point correction or the predetermined position of the lower disk member 50, as in the present invention. That is, by increasing the number of pulses per second applied to the stepping motor 100 when the flow path is cut off and decreasing the number of pulses per second applied to the stepping motor 100 during flow communication, the stepping motor 100 is generated The torque to be generated by the stepping motor 100 during communication with the oil passage becomes large. At this time, the number of pulses per second applied to the stepping motor 100 when the flow path is cut off is greater than the number of pulses per second applied to the stepping motor 100 when the flow path is closed, The torque becomes smaller than the torque generated by the stepping motor 100 at the time of communication with the flow passage.

The stepping motor control method for driving the disc member of the present invention will be described below.

First, the position sensing unit 200 senses that the through-hole 61 of the upper disc member 60 is at the zero point position when the flow path of the lower disc member 50 is blocked.

Thereafter, the pulse control unit 300 is operated from the time when the upper disk member 60 is at the zero point position to the time of communication through the through holes 51, 52, 53, 54 of the upper and lower disk members 60, After controlling the number of pulses per second applied to the stepping motor 100 driving the upper disk member 60 to a first preset number, the rotation control unit 400 controls the upper disk member 60 to rotate the lower disk member 50 to a predetermined position.

The position sensing unit 200 senses that the through holes 61 of the upper disk member 60 are located at the positions of the through holes 51, 52, 53, 54 at the time of passage of the lower disk member 50 do.

The through holes 51, 52, 53 and 54 of the upper and lower disk members 60 and 50 are displaced from each other when the upper disk member 60 is at the predetermined position of the lower disk member 50. [ The pulse control unit 300 controls the number of pulses per second applied to the stepping motor 100 to a second predetermined number greater than the first preset number and then the rotation control unit 400 controls the rotation of the lower disk member 50 ) To the zero point position.

FIG. 3 is an embodiment of a method in which the upper disk member of FIG. 2 is rotated to move to the zero point position.

2, the rotation control unit 400 rotates the upper disc member 60 from the zero position to a predetermined position. Depending on the use of the water purifier of the user, 52, 53, and 54, respectively.

3 shows a state in which the upper disk member 60 is rotated 90 degrees from the zero position by the driving of the stepping motor 100. The through hole 61 of the upper disk member 60 is in contact with the lower disk member 50, And the fourth through holes 54 of the first through fourth holes 54 communicate with each other. Similarly, when the upper disk member 60 is rotated by 180 degrees from the zero point position by the driving of the stepping motor 100, the through hole 61 of the upper disk member 60 is inserted into the through hole 61 of the lower disk member 50, (54) so that the flow path communicates with each other.

4 is a graph showing a relationship of torque generated by the stepping motor to the number of pulses per second applied to the stepping motor of the present invention. As shown in FIG. 4, the torque [Torque, T] is changed in accordance with the number of pulses Per Second applied to the stepping motor. At this time, as the number of pulses per second increases, the torque tends to decrease.

In the example of FIG. 4, the number of pulses per second applied to the stepping motor 100 during flow communication is reduced to about 100 PPS, and the number of pulses per second applied to the stepping motor 100 is increased to about 250 PPS. By controlling the number of pulses per second as described above, the torque generated by the stepping motor 100 during passage can be increased to about 5T, and the torque generated by the stepping motor 100 can be reduced to about 3T when the flow path is cut off.

Although the stepping motor control device for driving the disk member of the present invention is applied to the disk member applied to the flow path opening / closing valve of the water purifier as described above, it can be applied to the disk member applied to the cleaning kit for cleaning the water purifier in the same manner Of course it is.

The present invention is not limited to the above-described embodiments and the accompanying drawings. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims, It will be obvious to the person.

1 is a perspective view of a flow path opening / closing valve provided with a stepping motor control device for driving a disk member of the present invention.

Fig. 2 is a schematic internal configuration diagram of Fig. 1. Fig.

4 is a graph showing a relationship of torque generated by the stepping motor to the number of pulses per second applied to the stepping motor of the present invention.

Description of the Related Art

30: flow path opening / closing valve 40:

41: inlet port 42a: first outlet port

42b: second outlet port 50, 60: disk member

51, 52, 53, 54, 61: through hole 70:

90: raw water piping 91: first piping

92: second piping 100: stepping motor

200: position sensing unit 300: pulse control unit

400:

Claims

A stepping motor controller for controlling positions of upper and lower disk members having through holes,

And the number of pulses applied to the stepping motor for driving the upper and lower disk members is measured to determine whether the positions of the upper and lower disk members are equal to each other at a passage position where the through holes of the upper and lower disk members coincide with each other, A position sensing unit for sensing whether the ball is at a zero point position when the flow path of the lower disk member is blocked;

And a second predetermined number of pulses per second is applied to the stepping motor from the zero point position to the flow passage position, A pulse controller for applying a second preset number of pulses to the stepping motor in a second number greater than the first preset number of pulses per second; And

A rotation control unit for rotating the stepping motor by a predetermined number of pulses applied to the pulse control unit;

And a stepping motor controller for driving the disk member.

The method according to claim 1,

When the upper disk member is rotated to a position where the through hole of the lower disk member is located after the passage of the flow of the fluid, or when the upper disk member is rotated to the zero point position after the flow of the upper disk member is blocked, Wherein the step (c) is performed to remove the applied pulse.

The method according to claim 1,

Wherein the stepping motor generates a larger torque when the flow passage is made than when the flow passage is cut off.

Detecting that the through-hole of the upper disc member is at the zero point position when the flow path of the lower disc member is blocked;

The number of pulses per second applied to the stepping motor for driving the upper disk member from the zero point to the passage position is controlled to be a first preset number so that the upper disk member is allowed to pass through the lower disk member Rotating the ball to a position where the ball is present;

Detecting that the through-hole of the upper disc member is in a position where the through-hole is communicated with the lower disc member; And

The number of pulses per second applied to the stepping motor from a position at which the through-hole of the upper disk member communicates with the passage of the lower disk member to a passage interrupting position at which the through- Controlling the number of the first disk units to a second predetermined number larger than the first set number and rotating the disk unit to a zero point position of the lower disk member;

And controlling the stepping motor to rotate.

5. The method of claim 4,

Removing the pulse applied to the stepping motor when the upper disk member has been pivoted to the passage communication position having the through hole of the lower disk member or when the upper disk member has been rotated to the zero point position Further comprising the step of controlling the stepping motor.

5. The method of claim 4,

Wherein the stepping motor generates a greater torque when the flow path is opened than when the flow path is cut off.