CA2039884A1 - Electromechanical bidirectional rotation device - Google Patents
Electromechanical bidirectional rotation deviceInfo
- Publication number
- CA2039884A1 CA2039884A1 CA 2039884 CA2039884A CA2039884A1 CA 2039884 A1 CA2039884 A1 CA 2039884A1 CA 2039884 CA2039884 CA 2039884 CA 2039884 A CA2039884 A CA 2039884A CA 2039884 A1 CA2039884 A1 CA 2039884A1
- Authority
- CA
- Canada
- Prior art keywords
- connection terminal
- motor
- operative
- pipe
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Landscapes
- Electrically Driven Valve-Operating Means (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The bidirectional rotation device comprises a direct current motor connected in series with a capacitor and a reversible switching means. When a direct current voltage is applied to the series-connected combination of direct current motor and capacitor through the switching means in one posi-tion, the charged capacitor causes the motor to rotate in one direction for a short period of time; and when the voltage is again applied to the combination in the reversed polarities, the reversely charged capacitor will cause the motor to rotate in the reverse direction.
The bidirectional rotation device comprises a direct current motor connected in series with a capacitor and a reversible switching means. When a direct current voltage is applied to the series-connected combination of direct current motor and capacitor through the switching means in one posi-tion, the charged capacitor causes the motor to rotate in one direction for a short period of time; and when the voltage is again applied to the combination in the reversed polarities, the reversely charged capacitor will cause the motor to rotate in the reverse direction.
Description
2~3988~
This invention relates to a bidirectional rotation device and more particularly relates to an electromechanical bidirec-tional rotation device applicable for controlling a variety of mechanical apparatuses.
In electromechanical control apparatuses, it is often required to control a mechanical componet such as a baffle, interlock or the like between two positions selectively and alternately. For example, in the conduction of a gaseoous material from one location to another location, a baffle plate is provided in the conducting pipe so that the baffle can be pivotted to position either parallel to the longitudinal axis of the pipe to allow the gas to flow through the pipe or transverse to the longitudinal axis thus blocking the flow of gas through the pipe. An electromechanical system is commonly employed to provide the positioning of such baffle. The baffle is connected to a mechanical pivotting linkage outside of the pipe, and the linkage is coupled to an electromagnetic solen-oid. The solenoid can be energized to push the linkage in a direction to position the baffle at the selec-ted position accordingly. In such system, a biassing means such as a bias-sing spring must be provided to return the baEfle to the first poSLtion when the solenoid is de-energized. It can be appreci-ated that the solenoid must be of such size that sufficiency strength is generated therein to overcome the force of the :
25 ~ blassing spring initially in order to pivot the baffle to the selected blocking position. Furthermore, in order to maintain :` :: :
the baffle in the blocking position, the solenoid must remain energiz~ed. Thus, it is not energy efficient to operate such system. Moreover, such solenold system requires a relatively high voltag~ to operate. Therefore, it is not suitable for 2~3~8~
use, particularly, in a low voltage system. For a low voltage system, complex electrical control is usually required to provide sufficient torque to operate the mechanical component.
Also, in such electromechanical arrangement, the mechanical linka~e is oEten subject to breakdown after a relatively short period of time in use.
It is a principal object of the present invention to provide an electromechanical bidirectional rotation device which has relatively no mechanical wearing parts.
It is another object of the present invention to provide an electromechanical rotation device suitable for use in a low voltage system.
It is another object of the present invention to provide a baffling system for a gas conducting pipe having a high torque electromechanica] control device for the baffle.
It is yet another object of the present invention to provide an electromechanical device which has low energy comsumption.
It is still another object of the present invention to provide an electromechanical device which has relatively not wearing parts and is simple in construction and can be incor-porated in other control system easily.
Other objects of this Lnvention will appear in the ~ following description and appended claims, reference being made to the accompanying draw:ings forming a part of the specification, in which Figure 1 is a schematic diagram of the electromechani-cal device according to the present invention.
Figure 2 is a partial sectional elevation of the electro-mechanical baffle device for a gas conducting pipe according 2~3988~
to the present invention.
Figure 3 is a top sectional elevation view along section line III - III of Figure 2.
I'he present invention is illustrated in the accompanying figures wherein similar parts are indicated by the same reference numerals throughout the several views, and where pairs or parts are used the parts are referenced by prime of reference numeral.
In the drawings, the direct current ( DC ) motor 10 in the device of the present invention may be of a permanent magnet or electromagnetic type which is operative to rotate in one direction when the direct current voltage is applied to it in one polarity, and to rotate in a reverse direction when the voltage of a reverse polarity is applied thereto. A
capacitor 11 is connected in series with the DC motor 10. The combination of the series-connected DC motor 10 and capacitor 11 is connected to a reversible switching means 12. The reversible switching means 12 may be a mechanical switch or an electronic switch of the same function. It may be a single pole double throw switch or double pole double throw switch having connection terminals 13 and 14, and supply terminal 15 and 16. The connection terminal 13 is connected to the posi-tive terminal of the DC motor 10 through the capacitor 11 as shown, and the connection terminal 14 is connected to the negative terminal of the DC motor 10. The supply terminal 15 is connected to the positive polarity of a direct current voltage source 17 while the supply terminal 16 is connected to the negative polarity of the supply voltage source 17. In the case of a s1ngle pole double throw switch, the reversible switching means 12 has one single movable contact therein 2~398~
coupled to the connection terminal 13. The movable contact is operative to one position at which it connects the the connec-tion terminal 13 to the supply terminal 15, and to a second position wherein the movable contact connects the connection termina] 13 to the connection terminal 14. Supply terminal 16 and connection terminal 14 are commonly connected together.
When the movable contact of the reversible switching means is at the first postion the positive potential flows from the voltage source 17 through capacitor 11 to the motor 10, and the combination of capacitor 11 and motor 10 will act as a common capacitor-inductor circuit, so that the capacitor 11 will be charged to the positive potential as shown in Figure l. The charged capacitor 11 will then cause the motor 10 to rotate in one direction for a predetermined period of time until the charges in the capacitor 11 are expended. As soon as it is discharged, the capacitor 11 will again be charged by the voltage source 17 to the same potential. If at this time, the reversible switching means 12 is operated to the second position with the connection terminal 13 connected to the connection 14, the charges in the already fully charged capacitor l1 will then be applied in the reversed polarities to the motor 10, thus causing the motor 10 to rotate in the reversed direction for a short period of time until the ~ .
~ capacitor 11 is completely discharged. If the reversible :
switch1ng means 12 is then again operated to return to its first position, the original condition will prevail and the ; motor 10 will rotate again in the first direction as described above. In this manner, the motor lO can be actuated to rotate in the opposite directions alternately.
In the case the reversible switching means 12 is a double :~
2 ~
throw double pole sw:itch~ it is operative selectively in one position in which the positive polarity of the voltage source 17 is applied to the positive terminal of the DC motor 10 through the capacitor 11 while the negative polarity of the voltage source 17 is connected through the supply terminal 16 and connection terminal 1~ to the negative terminal of the DC
motor 10; and in the second position, the negative polarity of the voltage source 17 is applied to the positive terminal of the DC motor 10 through the capacitor 11 while the positive polarity of the voltage source 17 is connected to the negative terminal of the DC motor 10. It can be appreciated by those skilled in the art that the capacitor 11 may be connected in series with the DC motor lO on either the positive terminal side of the DC motor 10 as shown or at the negative terminal side therein. Also, the negative and positive terminals may be opposite to those shown in Figure 1. Thus, the difference between the use of a single pole double throw switch and a double pole double throw switch is that in the first case the capacitor 11 will be charged at only one position of the reversible switching means, whereas it will be charged in both positions of the reversible switching means.
The electromechanical device of the present invention may be employed to provide the control of a varieties of mechani-cal components that require to be positioned in two alternate positions selectively. For example, the device may be incor-porated in a gas conducting system having a baffle 18 rotat-ably located within a pipe 19 which is used to conduct a gaseous material or air flow 20 therethrough. The baffle 18 is mounted on a rotatable shaft 21 coupled to -the rotary shaft 22 of the DC motor 10 as described above. The baffle 18 will 2~9~8~
rotate in one direction when the reversible switching means 12 is operated in one condition and it will rotate in the reverse d:irection when the reversible switching means 12 is operated in the second condition a].ternately and sequentially. When the baffle 18 is rotated in one direction i.t will be located in a position abutt:ing the abutment pin 21 located in the inside surface of the pipe 19 such that the plane of the baff].e 18 i9 parallel to the longitudinal axis of the pipe 19, thus allow-ing the gas to flow through the pipe 19. When the baffle 18 is rotated in the reverse direction by the operation of the reversible sw:itching means 12 it will rotate in the reverse direction until it is maintained in the position transverse or perpendicular to the longitudinal axis of the pipe 19 by the shoulder pin 24. Thus, the baffle 18 blocks the pipe 19 to prevent the gas from flowing therethrough.
The magnitude of the torque applied to the baffle 18 as well as the period of its rotation are dependent upon the value of the capacitor 11. The larger the capacitance of the capacitor 11, the larger will be the torque and longer will be the rotation of the DC motor 10 maintained by the capacitor 11. Furthermore, due to the relatively high torque that can be developed by the present device with a low voltage direct current motor, the device lends itself for incorporation in a low voltage electrical system used for controlling the operat-i.on of mechanical components in which the mechanical operation of such components requires a relatively high torque.
While I have illustrated in the drawings and description above specific methods and apparatus constituting preferred embodiments of the invention, it will be appreciated that various modifications may be made in the form of the apparat-2~3988~
us, and that equ:ivalent methods, elements and mechanism may be substituted therefor without departing from the scope of the invention. All such changes, including reversals of parts and the use of certain features of the invention independently of other features, all fall within the spirit and scope oE the invention as defined in the appended claims.
:: 8
This invention relates to a bidirectional rotation device and more particularly relates to an electromechanical bidirec-tional rotation device applicable for controlling a variety of mechanical apparatuses.
In electromechanical control apparatuses, it is often required to control a mechanical componet such as a baffle, interlock or the like between two positions selectively and alternately. For example, in the conduction of a gaseoous material from one location to another location, a baffle plate is provided in the conducting pipe so that the baffle can be pivotted to position either parallel to the longitudinal axis of the pipe to allow the gas to flow through the pipe or transverse to the longitudinal axis thus blocking the flow of gas through the pipe. An electromechanical system is commonly employed to provide the positioning of such baffle. The baffle is connected to a mechanical pivotting linkage outside of the pipe, and the linkage is coupled to an electromagnetic solen-oid. The solenoid can be energized to push the linkage in a direction to position the baffle at the selec-ted position accordingly. In such system, a biassing means such as a bias-sing spring must be provided to return the baEfle to the first poSLtion when the solenoid is de-energized. It can be appreci-ated that the solenoid must be of such size that sufficiency strength is generated therein to overcome the force of the :
25 ~ blassing spring initially in order to pivot the baffle to the selected blocking position. Furthermore, in order to maintain :` :: :
the baffle in the blocking position, the solenoid must remain energiz~ed. Thus, it is not energy efficient to operate such system. Moreover, such solenold system requires a relatively high voltag~ to operate. Therefore, it is not suitable for 2~3~8~
use, particularly, in a low voltage system. For a low voltage system, complex electrical control is usually required to provide sufficient torque to operate the mechanical component.
Also, in such electromechanical arrangement, the mechanical linka~e is oEten subject to breakdown after a relatively short period of time in use.
It is a principal object of the present invention to provide an electromechanical bidirectional rotation device which has relatively no mechanical wearing parts.
It is another object of the present invention to provide an electromechanical rotation device suitable for use in a low voltage system.
It is another object of the present invention to provide a baffling system for a gas conducting pipe having a high torque electromechanica] control device for the baffle.
It is yet another object of the present invention to provide an electromechanical device which has low energy comsumption.
It is still another object of the present invention to provide an electromechanical device which has relatively not wearing parts and is simple in construction and can be incor-porated in other control system easily.
Other objects of this Lnvention will appear in the ~ following description and appended claims, reference being made to the accompanying draw:ings forming a part of the specification, in which Figure 1 is a schematic diagram of the electromechani-cal device according to the present invention.
Figure 2 is a partial sectional elevation of the electro-mechanical baffle device for a gas conducting pipe according 2~3988~
to the present invention.
Figure 3 is a top sectional elevation view along section line III - III of Figure 2.
I'he present invention is illustrated in the accompanying figures wherein similar parts are indicated by the same reference numerals throughout the several views, and where pairs or parts are used the parts are referenced by prime of reference numeral.
In the drawings, the direct current ( DC ) motor 10 in the device of the present invention may be of a permanent magnet or electromagnetic type which is operative to rotate in one direction when the direct current voltage is applied to it in one polarity, and to rotate in a reverse direction when the voltage of a reverse polarity is applied thereto. A
capacitor 11 is connected in series with the DC motor 10. The combination of the series-connected DC motor 10 and capacitor 11 is connected to a reversible switching means 12. The reversible switching means 12 may be a mechanical switch or an electronic switch of the same function. It may be a single pole double throw switch or double pole double throw switch having connection terminals 13 and 14, and supply terminal 15 and 16. The connection terminal 13 is connected to the posi-tive terminal of the DC motor 10 through the capacitor 11 as shown, and the connection terminal 14 is connected to the negative terminal of the DC motor 10. The supply terminal 15 is connected to the positive polarity of a direct current voltage source 17 while the supply terminal 16 is connected to the negative polarity of the supply voltage source 17. In the case of a s1ngle pole double throw switch, the reversible switching means 12 has one single movable contact therein 2~398~
coupled to the connection terminal 13. The movable contact is operative to one position at which it connects the the connec-tion terminal 13 to the supply terminal 15, and to a second position wherein the movable contact connects the connection termina] 13 to the connection terminal 14. Supply terminal 16 and connection terminal 14 are commonly connected together.
When the movable contact of the reversible switching means is at the first postion the positive potential flows from the voltage source 17 through capacitor 11 to the motor 10, and the combination of capacitor 11 and motor 10 will act as a common capacitor-inductor circuit, so that the capacitor 11 will be charged to the positive potential as shown in Figure l. The charged capacitor 11 will then cause the motor 10 to rotate in one direction for a predetermined period of time until the charges in the capacitor 11 are expended. As soon as it is discharged, the capacitor 11 will again be charged by the voltage source 17 to the same potential. If at this time, the reversible switching means 12 is operated to the second position with the connection terminal 13 connected to the connection 14, the charges in the already fully charged capacitor l1 will then be applied in the reversed polarities to the motor 10, thus causing the motor 10 to rotate in the reversed direction for a short period of time until the ~ .
~ capacitor 11 is completely discharged. If the reversible :
switch1ng means 12 is then again operated to return to its first position, the original condition will prevail and the ; motor 10 will rotate again in the first direction as described above. In this manner, the motor lO can be actuated to rotate in the opposite directions alternately.
In the case the reversible switching means 12 is a double :~
2 ~
throw double pole sw:itch~ it is operative selectively in one position in which the positive polarity of the voltage source 17 is applied to the positive terminal of the DC motor 10 through the capacitor 11 while the negative polarity of the voltage source 17 is connected through the supply terminal 16 and connection terminal 1~ to the negative terminal of the DC
motor 10; and in the second position, the negative polarity of the voltage source 17 is applied to the positive terminal of the DC motor 10 through the capacitor 11 while the positive polarity of the voltage source 17 is connected to the negative terminal of the DC motor 10. It can be appreciated by those skilled in the art that the capacitor 11 may be connected in series with the DC motor lO on either the positive terminal side of the DC motor 10 as shown or at the negative terminal side therein. Also, the negative and positive terminals may be opposite to those shown in Figure 1. Thus, the difference between the use of a single pole double throw switch and a double pole double throw switch is that in the first case the capacitor 11 will be charged at only one position of the reversible switching means, whereas it will be charged in both positions of the reversible switching means.
The electromechanical device of the present invention may be employed to provide the control of a varieties of mechani-cal components that require to be positioned in two alternate positions selectively. For example, the device may be incor-porated in a gas conducting system having a baffle 18 rotat-ably located within a pipe 19 which is used to conduct a gaseous material or air flow 20 therethrough. The baffle 18 is mounted on a rotatable shaft 21 coupled to -the rotary shaft 22 of the DC motor 10 as described above. The baffle 18 will 2~9~8~
rotate in one direction when the reversible switching means 12 is operated in one condition and it will rotate in the reverse d:irection when the reversible switching means 12 is operated in the second condition a].ternately and sequentially. When the baffle 18 is rotated in one direction i.t will be located in a position abutt:ing the abutment pin 21 located in the inside surface of the pipe 19 such that the plane of the baff].e 18 i9 parallel to the longitudinal axis of the pipe 19, thus allow-ing the gas to flow through the pipe 19. When the baffle 18 is rotated in the reverse direction by the operation of the reversible sw:itching means 12 it will rotate in the reverse direction until it is maintained in the position transverse or perpendicular to the longitudinal axis of the pipe 19 by the shoulder pin 24. Thus, the baffle 18 blocks the pipe 19 to prevent the gas from flowing therethrough.
The magnitude of the torque applied to the baffle 18 as well as the period of its rotation are dependent upon the value of the capacitor 11. The larger the capacitance of the capacitor 11, the larger will be the torque and longer will be the rotation of the DC motor 10 maintained by the capacitor 11. Furthermore, due to the relatively high torque that can be developed by the present device with a low voltage direct current motor, the device lends itself for incorporation in a low voltage electrical system used for controlling the operat-i.on of mechanical components in which the mechanical operation of such components requires a relatively high torque.
While I have illustrated in the drawings and description above specific methods and apparatus constituting preferred embodiments of the invention, it will be appreciated that various modifications may be made in the form of the apparat-2~3988~
us, and that equ:ivalent methods, elements and mechanism may be substituted therefor without departing from the scope of the invention. All such changes, including reversals of parts and the use of certain features of the invention independently of other features, all fall within the spirit and scope oE the invention as defined in the appended claims.
:: 8
Claims (6)
1. An electromechanical bidirectional rotation device compris-ing, a direct current motor means having one input terminal and a second input terminal, said motor means being operative to rotate in a selected one direction by applying a direct current voltage thereto of one selected polarity and to rotate in a reverse direction opposite to said one direction by applying thereto said direct current voltage in a second polarity opposite to said one selected polarity, a capacitive means connected in series with said motor means through said one input terminal, a reversible switching means having a first connection terminal, a second connection terminal, a third connection terminal and a fourth connection terminal, said capacitive means and said motor means being connected in series with said first connection terminal, and said second connection terminal being connected to said second input terminal of said motor means, said third connection terminal being operative for connection to one polarity of a direct current voltage supply means and said fourth connection terminal being operative for connection to an opposite polarity of said direct current voltage supply means respectively, whereby said capacitive means is charged to a predetermined potential to cause said motor means to rotate for a predetermined period of time in one direction.
2. An electromechanical bidirectional rotation device accord-ing to Claim 1 wherein said reversible switching means is a single pole double throw switching means having a movable contact therein connected to said first connection terminal, first fixed contact connected to said third connection termin-al, and a second fixed contact connected to both said second connection terminal and said fourth connection terminal, said movable contact being operative to locate at one position wherein said first connection terminal is connected to said third connection terminal whereby said motor means rotates in one direction for a predetermined period of time, and follow-ing said first position to locate selectively at a second position wherein said first connection terminal is connected to said second connection terminal whereby said motor means rotates in a reverse direction.
3. An electromechanical bidirectional rotation device accord-ing to Claim 1 wherein said reversible switching means is a double pole double throw switch, said switching means being operative selectively in one condition in which said one connection terminal is connected with said third connection terminal while said second connection terminal is connected to said fourth terminal whereby said motor means rotates in one direction for a predetermined period of time, and said switch-ing means being operative selectively in a second condition in which said one connection terminal is connected to said fourth connection terminal while said second connection terminal is connected to said third connection terminal whereby said motor means rotates in a direction opposite to said first direction.
4. In a gas conduction pipe system wherein the gas flowing through said pipe is controlled by an electromechanical device comprising, a baffle plate means rotatably mounted within said pipe and having a rotatable shaft extending outside of said pipe, a direct current motor means coupled to said pipe, a reversible switching means having one connection terminal, a second connection terminal, a third connection terminal and a fourth connection terminal, said reversible switching means being operative selectively in one condition wherein said one connection terminal. is connected to said third connection terminal while said second connection termi-nal is connected to said fourth connection terminal, and in a second condition wherein said one connection terminal is connected to said fourth connection terminal while said second connection terminal is connected to said third connection terminal, a capacitive means connected in series with said motor means and said one connection terminal of said reversible switching means, said motor means having a second input terminal connected to said second connection terminal of said reversible switch-ing means, a direct current voltage supply means having one polarity operative for connecting to said third connection terminal of said reversible switching means, and a reverse polarity operative for connecting to said fourth connection terminal of said reversible switching means, a first abutment means located within said pipe and operative to abut said baffle plate means when said baffle plate means is rotated to a transverse position perpendicular to the longitudinal axis of the pipe, a second abutment means located within said pipe and operative to abut said baffle plate means when said baffle plate means is rotated to a second position substantially parallel to the longitudinal axis of the pipe.
5. An electromechanical device according to Claim 4 wherein said motor means is a low voltage permanent magnet motor.
6. An electromechanical device according to Claim 5 wherein said motor means is mounted on said pipe and having a rotary shaft therein coupled to said rotatable shaft of said baffle plate means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2039884 CA2039884A1 (en) | 1991-04-05 | 1991-04-05 | Electromechanical bidirectional rotation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2039884 CA2039884A1 (en) | 1991-04-05 | 1991-04-05 | Electromechanical bidirectional rotation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2039884A1 true CA2039884A1 (en) | 1992-10-06 |
Family
ID=4147340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2039884 Abandoned CA2039884A1 (en) | 1991-04-05 | 1991-04-05 | Electromechanical bidirectional rotation device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2039884A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6100655A (en) * | 1999-02-19 | 2000-08-08 | Mcintosh; Douglas S. | Mechanical return fail-safe actuator for damper, valve, elevator or other positioning device |
-
1991
- 1991-04-05 CA CA 2039884 patent/CA2039884A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6100655A (en) * | 1999-02-19 | 2000-08-08 | Mcintosh; Douglas S. | Mechanical return fail-safe actuator for damper, valve, elevator or other positioning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |