WO2020139221A1 - An electric motor with mechanically-changed direction of rotation - Google Patents

An electric motor with mechanically-changed direction of rotation Download PDF

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Publication number
WO2020139221A1
WO2020139221A1 PCT/TR2019/050376 TR2019050376W WO2020139221A1 WO 2020139221 A1 WO2020139221 A1 WO 2020139221A1 TR 2019050376 W TR2019050376 W TR 2019050376W WO 2020139221 A1 WO2020139221 A1 WO 2020139221A1
Authority
WO
WIPO (PCT)
Prior art keywords
connection
motor
central
group
bridge
Prior art date
Application number
PCT/TR2019/050376
Other languages
French (fr)
Inventor
Hasim OTUNC
Caglar ACAR
Caner SIMSEK
Burcu DURAK
Ahmet CETINER
Original Assignee
Arcelik Anonim Sirketi
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Arcelik Anonim Sirketi filed Critical Arcelik Anonim Sirketi
Priority to EP19901530.6A priority Critical patent/EP3903327A4/en
Publication of WO2020139221A1 publication Critical patent/WO2020139221A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/08—Short-circuiting members for bridging contacts in a counterpart
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/09—Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators

Definitions

  • the present invention relates to an industrial type electric motor of which the direction of rotation is mechanically changed.
  • Electric motors especially industrial type electric motors are basically composed of the fixed stator and rotating rotor.
  • the stator is formed by stacking laminations with different thicknesses in special molds and then the windings are passed through the slots thereof.
  • the rotor is also formed by stacking laminations one above the other, and preferably aluminum rods are hammered into the slots thereof.
  • a magnetic field is generated by means of the electrical energy supplied to the stator windings and this magnetic field cuts the rods in the rotor, thus resulting in the flow of alternative current.
  • the magnetic field applies a force onto the conductor through which current flows and as a result of this force the rotor is enabled to be rotated.
  • the electrical energy is received via the terminal box and the output power is taken from the end of the shaft connected to the rotor.
  • the shaft may rotate right or left around its own axis and the user can use these two directions depending on the field of application.
  • the connections on the terminal box are required to be changed.
  • the phases from the mains are connected in order the motor rotates right and when two of the phases are replaced without changing the last phase the motor rotates left.
  • two phases must be replaced.
  • a reversible motor drive circuit for controlling the motor is disclosed, which is used for rotating the motor in the forward and backward directions.
  • Another state of the art embodiment is explained in the Chinese Utility Model Document Application No. CN202068266.
  • the motor direction change device disclosed in this document comprises a trigger switch, a terminal box sleeve and a terminal box base.
  • the switch and the terminal box sleeve are connected to each other by means of a screw.
  • the screw connects the switch to the cable connections covered by the terminal box sleeve and the base connector.
  • the sleeve is connected to the terminal box base and the motor.
  • the aim of the present invention is the realization of an electric motor of which the direction of rotation is mechanically changed.
  • the motor realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof comprises a direction changing element which keeps one of the phases fixed while changing the other two phases in order to change the direction of rotation of the motor, thus realizing flat connection in the first position and cross connection in the second position.
  • the direction of the motor can be changed with one step in accordance with the star-delta connection in the motor.
  • the user can change the direction of the motor in an easy and efficient manner without any error and any need for detaching each connection.
  • one of the phases is kept fixed while the other two phases are replaced.
  • the phases coming from the mains are connected to the three stud bolts in the mains connection group on the connection table.
  • the connections coming from the motor are connected to the three stud bolts in the motor connection group on the connection table.
  • the user changes the direction by means of the direction changing element.
  • the time required for changing the direction of rotation in the motors is decreased.
  • the need for removing the nut, washer and mains connection and rearranging the same for the new connection while making connection for changing the direction of the motor is eliminated.
  • losses in labor and time are prevented and moreover, connection errors which may occur during the modification of the connection are avoided.
  • Figure 1 - is the top perspective view of a connection table.
  • Figure 2 - is the top view of the connection table.
  • Figure 3 - is the top view of the connection table.
  • Second connection plate 14. First cross connection plate
  • the motor (1) comprises a connection table (2) wherein nine connection elements (6) are positioned so as to form a 3x3 matrix, which are composed of a mains connection group (3) which provides the connection of the motor (1) to the mains and which comprises three connection elements (6), a central connection group (4) which is positioned parallel to the mains connection group (3) and which is composed of three connection elements (6) and a motor connection group (5) which is connected to the motor (1), which comprises three connection elements (6) and which is positioned in the same manner as the other connection elements
  • the motor (1) comprises a plate (11) which enables one connection element (6) each from the central connection group (4) and the motor connection group (5) to be directly connected to each other.
  • the motor (1) further comprises a first and second connection plates (12 and 13) which are disposed between the two opposite connection elements (6) between the central connection group (4) and the motor connection group (5) and which have a first and second gaps (16 and 17) therebetween, and a first and second cross connection plates (14 and 15) which are crosswise disposed between two connection elements (6) from each of the central connection group (4) and the motor connection group (5) and which have a central gap (18) at the center.
  • the first and second gap (16 and 17) prevent the electrical conduction between the connection elements (6) in the same direction on the central connection group (4) and the motor connection group (5) via the first and second connection plates (12 and 13).
  • the central gap (18) prevents the electrical conduction between the connection elements (6) in the crosswise direction on the central connection group (4) and the motor connection group (5) via the first and second cross connection plates (14 and 15) ( Figure 2).
  • the direction changing element (7) has a conductive base (23) and a non conducting ceiling (24), and comprises a first bridge (8) which is positioned between the two connection elements (6) in the same direction on the central connection group (4) and the motor connection group (5), a second bridge (9) which is disposed in the same direction as the first bridge (8) which is positioned between the other connection elements (6) in the same direction on the central connection group (4) and the motor connection group (5), a central bridge (10) which is disposed between the first and second bridges (8 and 9) and which is positioned at the center of the above-mentioned four connection elements (6) on the central connection group (4) and the motor connection group (5), and an actuator (22) which is provided on the central bridge (10) and which can be pushed/pulled by the user.
  • the direction changing element (7) further comprises two connectors (25) which connect the first bridge (8) and the central bridge (10) as well as the second bridge (9) and the central bridge (10).
  • the motor (1) further comprises a first housing (19) which is disposed on the connection table (2) between the central connection group (4) and the motor connection group (5), which is aligned with the first gap (16) and which receives the first bridge (8), a second housing (20) which is aligned with the second gap
  • the phases coming from the mains are connected to the three connection elements (6) on the mains connection group (3).
  • the connections coming from the motor (1) are connected to the three connection elements (6) on the motor connection group (5).
  • Two connection elements (6) which are oppositely positioned on the central connection group (4) and the motor connection group (5) in the same direction are directly connected to each other by means of the plate (11).
  • first and second connection plates (12 and 13) which have a first and second gaps (16 and 17) therebetween are positioned between the two opposite connection elements (6) between the central connection group (4) and the motor connection group (5) and the first and second cross connection plates (14 and 15) which have a central gap (18) at the center are crosswise disposed between two connection elements (6) from each of the central connection group (4) and the motor connection group (5).
  • the first and second housings (19 and 20) are aligned with the first and second gaps (16 and 17) while the central housing (21) is aligned with the central gap
  • the user uses the direction changing element (7) after the motor (1) stops, and this time a cross connection is provided.
  • the direction changing element (7) is pulled by the user by holding the actuator (22) backwards from the connection table (2), and the first bridge (8) and the second bridge (9) leave the first and second gaps (16 and 17) on the first and second connection plates (12 and 13), and electrical conduction between the two opposite connection elements (6) from each of the central connection group (4) and the motor connection group (5) is interrupted.
  • the central bridge (10) is seated into the central housing (21) and the central gap (18) is aligned with the conductive part of the direction changing element (7), and thus electrical conduction occurs between the crosswise connection elements (6) via the first and second cross connection plates (14 and 15).
  • the motor (1) rotates in the other direction, for example counterclockwise.
  • the direction of the motor (1) is easily changed by using the direction changing element (7).
  • the need for the user to detach two of the phases and replace and reconnect the same in the conventional method is eliminated.
  • the connection table (2) also allows the star-delta connection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

The present invention relates to a motor (1) comprising a connection table (2) wherein nine connection elements (6) are positioned so as to form a 3x3 matrix, which are composed of a mains connection group (3) which provides the connection of the motor (1) to the mains and which comprises three connection elements (6), a central connection group (4) which is positioned parallel to the mains connection group (3) and which is composed of three connection elements (6) and a motor connection group (5) which is connected to the motor (1), which comprises three connection elements (6) and which is positioned in the same manner as the other connection elements (6).

Description

AN ELECTRIC MOTOR WITH MECHANICALLY-CHANGED
DIRECTION OF ROTATION
DESCRIPTION
The present invention relates to an industrial type electric motor of which the direction of rotation is mechanically changed.
The basic function of the electric motor is to convert electrical energy to mechanical energy. Electric motors, especially industrial type electric motors are basically composed of the fixed stator and rotating rotor. The stator is formed by stacking laminations with different thicknesses in special molds and then the windings are passed through the slots thereof. Similar to the stator, the rotor is also formed by stacking laminations one above the other, and preferably aluminum rods are hammered into the slots thereof. A magnetic field is generated by means of the electrical energy supplied to the stator windings and this magnetic field cuts the rods in the rotor, thus resulting in the flow of alternative current. The magnetic field applies a force onto the conductor through which current flows and as a result of this force the rotor is enabled to be rotated. The electrical energy is received via the terminal box and the output power is taken from the end of the shaft connected to the rotor.
In the electric motors the shaft may rotate right or left around its own axis and the user can use these two directions depending on the field of application. In state of the art embodiments, in order to change the direction of rotation the connections on the terminal box are required to be changed. When the phases from the mains are connected in order the motor rotates right and when two of the phases are replaced without changing the last phase the motor rotates left. In other words, in order to change the direction of rotation of the motor two phases must be replaced. These two connections have different advantages and disadvantages with respect to the start-up and operational characteristics of the motor. Therefore, the terminal plate must be suitable for both of these two connections.
In the state of the art United States Patent Application No. US2004217724, a reversible motor drive circuit for controlling the motor is disclosed, which is used for rotating the motor in the forward and backward directions. Another state of the art embodiment is explained in the Chinese Utility Model Document Application No. CN202068266. The motor direction change device disclosed in this document comprises a trigger switch, a terminal box sleeve and a terminal box base. The switch and the terminal box sleeve are connected to each other by means of a screw. The screw connects the switch to the cable connections covered by the terminal box sleeve and the base connector. The sleeve is connected to the terminal box base and the motor.
Another state of the art embodiment is explained in the Chinese Utility Model Document Application No. CN202841025. This document relates to an inverter which changes the direction of the motor and positive and negative alternating frequency changer applied to the frequency changing areas.
The aim of the present invention is the realization of an electric motor of which the direction of rotation is mechanically changed.
The motor realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof comprises a direction changing element which keeps one of the phases fixed while changing the other two phases in order to change the direction of rotation of the motor, thus realizing flat connection in the first position and cross connection in the second position. By means of the present invention, the direction of the motor can be changed with one step in accordance with the star-delta connection in the motor. Thus, the user can change the direction of the motor in an easy and efficient manner without any error and any need for detaching each connection.
Preferably in order to change the direction of rotation in three-phase asynchronous motors one of the phases is kept fixed while the other two phases are replaced. The phases coming from the mains are connected to the three stud bolts in the mains connection group on the connection table. The connections coming from the motor are connected to the three stud bolts in the motor connection group on the connection table. After the motor stops, the user changes the direction by means of the direction changing element. By means of the present invention, the need for the user to detach two of the phases and replace and reconnect the same in the conventional method is eliminated. By means of nine stud bolts used the connection table allows the star-delta connection.
By means of the present invention, the time required for changing the direction of rotation in the motors is decreased. The need for removing the nut, washer and mains connection and rearranging the same for the new connection while making connection for changing the direction of the motor is eliminated. Thus, losses in labor and time are prevented and moreover, connection errors which may occur during the modification of the connection are avoided.
A motor realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
Figure 1 - is the top perspective view of a connection table.
Figure 2 - is the top view of the connection table.
Figure 3 - is the top view of the connection table.
The elements illustrated in the figures are numbered as follows:
1. Motor
2. Connection table
3. Mains connection group
4. Central connection group
5. Motor connection group
6. Connection element
7. Direction changing element
8. First bridge
9. Second bridge
10. Central bridge 11. Plate
12. First connection plate
13. Second connection plate 14. First cross connection plate
15. Second cross connection plate
16. First gap
17. Second gap
18. Central gap
19. First housing
20. Second housing
21. Central housing
22. Actuator
23. Base
24. Ceiling
25. Connector
The motor (1) comprises a connection table (2) wherein nine connection elements (6) are positioned so as to form a 3x3 matrix, which are composed of a mains connection group (3) which provides the connection of the motor (1) to the mains and which comprises three connection elements (6), a central connection group (4) which is positioned parallel to the mains connection group (3) and which is composed of three connection elements (6) and a motor connection group (5) which is connected to the motor (1), which comprises three connection elements (6) and which is positioned in the same manner as the other connection elements
(6); and a direction changing element (7) which has two positions and which changes, as flat in one position and cross connection in the other position, the connection between two connection elements (6) from each of the central connection group (4) and the motor connection group (5) as flat in a position and cross connection in the other position while keeping the connection between two opposite connection elements (6) each from the central connection group (4) and the motor connection group (5). Thus, by keeping one of the phases fixed and changing the other two phases, The motor (1) comprises a plate (11) which enables one connection element (6) each from the central connection group (4) and the motor connection group (5) to be directly connected to each other.
The motor (1) further comprises a first and second connection plates (12 and 13) which are disposed between the two opposite connection elements (6) between the central connection group (4) and the motor connection group (5) and which have a first and second gaps (16 and 17) therebetween, and a first and second cross connection plates (14 and 15) which are crosswise disposed between two connection elements (6) from each of the central connection group (4) and the motor connection group (5) and which have a central gap (18) at the center. The first and second gap (16 and 17) prevent the electrical conduction between the connection elements (6) in the same direction on the central connection group (4) and the motor connection group (5) via the first and second connection plates (12 and 13). Similarly, the central gap (18) prevents the electrical conduction between the connection elements (6) in the crosswise direction on the central connection group (4) and the motor connection group (5) via the first and second cross connection plates (14 and 15) (Figure 2).
The direction changing element (7) has a conductive base (23) and a non conducting ceiling (24), and comprises a first bridge (8) which is positioned between the two connection elements (6) in the same direction on the central connection group (4) and the motor connection group (5), a second bridge (9) which is disposed in the same direction as the first bridge (8) which is positioned between the other connection elements (6) in the same direction on the central connection group (4) and the motor connection group (5), a central bridge (10) which is disposed between the first and second bridges (8 and 9) and which is positioned at the center of the above-mentioned four connection elements (6) on the central connection group (4) and the motor connection group (5), and an actuator (22) which is provided on the central bridge (10) and which can be pushed/pulled by the user. The direction changing element (7) further comprises two connectors (25) which connect the first bridge (8) and the central bridge (10) as well as the second bridge (9) and the central bridge (10).
The motor (1) further comprises a first housing (19) which is disposed on the connection table (2) between the central connection group (4) and the motor connection group (5), which is aligned with the first gap (16) and which receives the first bridge (8), a second housing (20) which is aligned with the second gap
(17) and which receives the second bridge (9), and a central housing (21) which is aligned with the central gap (18) and which receives the central bridge (10) (Figure 3).
In the embodiment of the present invention, the phases coming from the mains are connected to the three connection elements (6) on the mains connection group (3). The connections coming from the motor (1) are connected to the three connection elements (6) on the motor connection group (5). Two connection elements (6) which are oppositely positioned on the central connection group (4) and the motor connection group (5) in the same direction are directly connected to each other by means of the plate (11). In this case the first and second connection plates (12 and 13) which have a first and second gaps (16 and 17) therebetween are positioned between the two opposite connection elements (6) between the central connection group (4) and the motor connection group (5) and the first and second cross connection plates (14 and 15) which have a central gap (18) at the center are crosswise disposed between two connection elements (6) from each of the central connection group (4) and the motor connection group (5). On the connection table (2) the first and second housings (19 and 20) are aligned with the first and second gaps (16 and 17) while the central housing (21) is aligned with the central gap
(18) on the connection table (2).
When the user uses the direction changing element (7) after the motor (1) stops, a flat connection is provided. In this case, the direction changing element (7) is pushed by the user by pressing on the actuator (22) towards the connection table (2), and the first bridge (8) and the second bridge (9) are seated into the first and second gaps (16 and 17) on the first and second connection plates (12 and 13), and electrical conduction is provided between the two opposite connection elements (6) from each of the central connection group (4) and the motor connection group (5). In the meantime, since the central bridge (10) is not seated into the central housing (21), the central gap (18) is aligned with the non-conducting part of the direction changing element (7), and no electrical conduction occurs between the crosswise connection elements (6) via the first and second cross connection plates (14 and 15). Thus, the motor (1) rotates in a direction, for example clockwise.
When the direction of the motor (1) is required to be changed, the user uses the direction changing element (7) after the motor (1) stops, and this time a cross connection is provided. In this case, the direction changing element (7) is pulled by the user by holding the actuator (22) backwards from the connection table (2), and the first bridge (8) and the second bridge (9) leave the first and second gaps (16 and 17) on the first and second connection plates (12 and 13), and electrical conduction between the two opposite connection elements (6) from each of the central connection group (4) and the motor connection group (5) is interrupted. In the meantime, the central bridge (10) is seated into the central housing (21) and the central gap (18) is aligned with the conductive part of the direction changing element (7), and thus electrical conduction occurs between the crosswise connection elements (6) via the first and second cross connection plates (14 and 15). Thus, the motor (1) rotates in the other direction, for example counterclockwise.
By means of the present invention, the direction of the motor (1) is easily changed by using the direction changing element (7). The need for the user to detach two of the phases and replace and reconnect the same in the conventional method is eliminated. By means of the nine connection elements (6) the connection table (2) also allows the star-delta connection.

Claims

1. A motor (1) comprising a connection table (2) wherein nine connection elements (6) are positioned so as to form a 3x3 matrix, which are composed of a mains connection group (3) which provides the connection of the motor (1) to the mains and which comprises three connection elements (6), a central connection group (4) which is positioned parallel to the mains connection group (3) and which is composed of three connection elements (6) and a motor connection group (5) which is connected to the motor (1), which comprises three connection elements (6) and which is positioned in the same manner as the other connection elements (6), characterized by a direction changing element (7) which has two positions and which changes, as flat in one position and cross connection in the other position, the connection between two connection elements (6) from each of the central connection group (4) and the motor connection group (5) while keeping fixed the connection between two opposite connection elements (6) each from the central connection group (4) and the motor connection group (5) in order to change the direction of the motor (1).
2. A motor (1) as in Claim 1, characterized by a plate (11) which enables one connection element (6) each from the central connection group (4) and the motor connection group (5) to be directly connected to each other.
3. A motor (1) as in Claim 1, characterized by a first and second connection plates (12 and 13) which are disposed between the two opposite connection elements (6) between the central connection group (4) and the motor connection group (5) and which have a first and second gaps (16 and 17) therebetween, and a first and second cross connection plates (14 and 15) which are crosswise disposed between two connection elements (6) from each of the central connection group (4) and the motor connection group (5) and which have a central gap (18) at the center.
4. A motor (1) as in Claim 1 and 3, characterized by the direction changing element (7) having a conductive base (23) and a non-conducting ceiling (24), and comprising a first bridge (8) which is positioned between the two connection elements (6) in the same direction on the central connection group (4) and the motor connection group (5), a second bridge (9) which is disposed in the same direction as the first bridge (8) and which is positioned between the other connection elements (6) in the same direction on the central connection group (4) and the motor connection group (5), a central bridge (10) which is disposed between the first and second bridges (8 and 9) and which is positioned at the center of the above-mentioned four connection elements (6) on the central connection group (4) and the motor connection group (5), and an actuator (22) which is provided on the central bridge (10) and which can be pushed/pulled by the user.
5. A motor (1) as in Claim 1 and 3, characterized by a first housing (19) which is disposed on the connection table (2) between the central connection group (4) and the motor connection group (5), which is aligned with the first gap (16) and which receives the first bridge (8), a second housing (20) which is aligned with the second gap (17) and which receives the second bridge (9), and a central housing (21) which is aligned with the central gap (18) and which receives the central bridge (10).
6. A motor (1) as in Claim 4, characterized by the direction changing element (7) comprising two connectors (25) which connect the first bridge (8) and the central bridge (10) as well as the second bridge (9) and the central bridge (10).
PCT/TR2019/050376 2018-12-25 2019-05-24 An electric motor with mechanically-changed direction of rotation WO2020139221A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19901530.6A EP3903327A4 (en) 2018-12-25 2019-05-24 An electric motor with mechanically-changed direction of rotation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2018/20426 2018-12-25
TR201820426 2018-12-25

Publications (1)

Publication Number Publication Date
WO2020139221A1 true WO2020139221A1 (en) 2020-07-02

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US2460277A (en) * 1946-11-01 1949-02-01 Photoswitch Inc Electronic timing device
JPS4942401U (en) 1972-07-07 1974-04-13
US4176261A (en) * 1978-06-16 1979-11-27 General Motors Corporation Electric switch for motor reversing
EP0594807A1 (en) * 1992-05-13 1994-05-04 Moto Meter Gmbh Device for switching on and off electric consumers, in particular display instruments in the dashboard of motor vehicles.
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