CN218499032U - Brake circuit for series excited motor and series excited motor - Google Patents
Brake circuit for series excited motor and series excited motor Download PDFInfo
- Publication number
- CN218499032U CN218499032U CN202222550755.1U CN202222550755U CN218499032U CN 218499032 U CN218499032 U CN 218499032U CN 202222550755 U CN202222550755 U CN 202222550755U CN 218499032 U CN218499032 U CN 218499032U
- Authority
- CN
- China
- Prior art keywords
- normally
- contact
- closed
- normally open
- open contact
- 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.)
- Active
Links
Images
Landscapes
- Stopping Of Electric Motors (AREA)
Abstract
The utility model discloses a brake circuit and series machine for series machine. Series machine includes rotor coil and stator coil for series machine's brake circuit includes: the brake circuit has a first connection state in which a first end of a rotor coil of the series motor is connected to a first terminal of the power supply, a second end of the rotor coil of the series motor is connected to a first end of a stator coil of the series motor, and a second end of the stator coil of the series motor is connected to a second terminal of the power supply; in the second connection state, a first end of the rotor coil of the series motor is connected to a second end of the stator coil of the series motor, and a first end of the stator coil of the series motor is connected to a second terminal of the rotor coil of the series motor. The manufacturing cost of the brake device is reduced by adding the electric brake circuit, and only a small installation space is needed.
Description
Technical Field
The utility model belongs to the technical field of the motor technique and specifically relates to a brake circuit and series machine for series machine is related to.
Background
At present, a large-scale driving motor mainly adopts a series excitation motor, and the motor has the advantages of large starting torque, smooth starting and the like. Because the rotating speed of the series excited motor is high, the mechanism of the high-voltage switch is easy to generate overshoot after power failure, mechanical parts in the motor can be damaged if a proper braking scheme is not adopted, or the generated electric signal is unreliable. However, for this type of motor, the brakes used include mechanical or electronic brake devices. However, in a braking scheme using an electronic device, for example, an electronic time relay, in a complicated electromagnetic environment such as a substation, the electronic device may be damaged due to installation on the mechanism side.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a brake circuit and series machine for make brake equipment's manufacturing cost reduce through increasing electric brake circuit, and only need less installation space.
According to the utility model discloses an embodiment provides a brake circuit for series machine, its characterized in that, series machine includes rotor coil and stator coil, series machine connects between the first terminal and the second terminal of power, its characterized in that: the brake circuit has a first connection state in which a first end of a rotor coil of the series motor is connected to a first terminal of a power supply, a second end of the rotor coil of the series motor is connected to a first end of a stator coil of the series motor, and a second connection state in which a second end of the stator coil of the series motor is connected to a second terminal of the power supply; in the second connection state, the first end of the rotor coil of the series motor is connected to the second end of the stator coil of the series motor, and the first end of the stator coil of the series motor is connected to the second terminal of the rotor coil of the series motor.
The brake circuit brakes by using residual magnetism after the motor is powered off, so that the safety of switch operation is ensured.
Preferably, the brake circuit includes a resistor connected between a first end of a stator coil of the series motor and a second end of a rotor coil of the series motor in the second connection state.
The structure can realize accurate control of the braking time through the resistor.
Preferably, the brake circuit comprises a contactor and an auxiliary switch, the contactor comprises a first contactor and a second contactor, and the first contactor comprises a first normally open contact, a second normally open contact, a third normally open contact, a first normally closed contact and a second normally closed contact; the second contactor comprises a fourth normally open contact, a fifth normally open contact, a sixth normally open contact, a third normally closed contact and a fourth normally closed contact; the auxiliary switch comprises a seventh normally open contact, an eighth normally open contact, a fifth normally closed contact and a sixth normally closed contact; in the brake circuit, the first end of the first normally open contact and the first end of the fourth normally open contact are connected to a first terminal of a power supply, the second end of the first normally open contact and the first end of the fifth normally open contact are connected at a first node, the second end of the fourth normally open contact and the first end of the second normally open contact are connected at a second node, a rotor coil of the series excited machine is connected between the first node and the second node, the second end of the fifth normally open contact and the second end of the second normally open contact are connected at a third node, the first end of the third normally open contact and the first end of the sixth normally open contact are connected to a second terminal of the power supply, a second end of the third normally-open contact is connected with a second end of the sixth normally-open contact at a fourth node, a first end of the seventh normally-open contact is connected with a first end of the fifth normally-closed contact at a fifth node, a second end of the seventh normally-open contact is connected with a first end of the sixth normally-closed contact at a sixth node, a second end of the fifth normally-closed contact is connected with a first end of the eighth normally-open contact at a seventh node, a second end of the sixth normally-closed contact is connected with a second end of the eighth normally-open contact at an eighth node, a stator coil of the series excited motor is connected between the fifth node and the eighth node, the eighth node is connected to the fourth node, and the fifth node is connected to the third node; a first end of the first normally closed contact is connected to the first node, a second end of the first normally closed contact is connected to a first end of the third normally closed contact, and a second end of the third normally closed contact is connected to the sixth node; the first end of the second normally-closed contact is connected to the second node, the second end of the second normally-closed contact is connected to the first end of the fourth normally-closed contact, and the second end of the fourth normally-closed contact is connected to the seventh node.
Preferably, in the first connection state, the first normally open contact is closed, the second normally open contact is closed, the third normally open contact is closed, the fourth normally open contact is open, the fifth normally open contact is open, the sixth normally open contact is open, the seventh normally open contact is open or closed, the eighth normally open contact is open or closed, the first normally closed contact is open, the second normally closed contact is open, the third normally closed contact is closed, the fourth normally closed contact is closed, the fifth normally closed contact is closed or open, and the sixth normally closed contact is closed or open.
Preferably, in the second connection state, the first normally open contact is open, the second normally open contact is open, the third normally open contact is open, the fourth normally open contact is open, the fifth normally open contact is open, the sixth normally open contact is open, the seventh normally open contact is open, the eighth normally open contact is open, the first normally closed contact is closed, the second normally closed contact is closed, the third normally closed contact is closed, the fourth normally closed contact is closed, the fifth normally closed contact is closed, and the sixth normally closed contact is closed.
Preferably, the brake circuit is in the first connection state during a closing operation of the series excited motor.
Preferably, after the series excited motor is switched on, the brake circuit is in the second connection state.
Preferably, the resistor is a current limiting resistor.
The structure can adjust the braking time by adjusting the braking resistance.
Preferably, the first contactor is a dc contactor or an ac contactor.
Preferably, the second contactor is a dc contactor or an ac contactor.
Preferably, the power supply is a 220 volt power supply.
Furthermore, according to another embodiment of the present invention, there is provided a series motor including the brake circuit for a series motor as described above.
As can be seen from the above, since the manufacturing cost of the brake apparatus is reduced by adding the electric brake circuit, and only a small installation space is required. In addition, the brake circuit brakes by using residual magnetism after the motor is powered off, so that the safety of switch operation is ensured.
Drawings
The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings, in which:
fig. 1 is a circuit schematic diagram of a brake circuit for a series excited machine according to the present invention.
In the above figures, the reference numerals used are as follows:
10: brake circuit
102: a first normally open contact;
108: a second normally open contact;
120: a third normally open contact;
110: a first normally closed contact;
116: a second normally closed contact;
104: a fourth normally open contact;
106: a fifth normally-on contact;
122: a sixth normally open contact;
112: a third normally closed contact;
114: a fourth normally closed contact;
124: a seventh normally open contact;
130: an eighth normally open contact;
126: a fifth normally closed contact;
128: a sixth normally closed contact;
l: a first terminal of a power supply;
n: a second terminal of the power supply;
m: a rotor coil of a series excited motor;
s: a stator coil of a series motor;
118: a resistor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail by referring to the following embodiments.
In order to avoid conflict, the embodiments and features of the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
Fig. 1 is a circuit schematic diagram of a brake circuit for a series excited machine according to the present invention.
As shown in fig. 1, a brake circuit 10 for a series motor includes: a first contactor comprising a first normally open contact 102, a second normally open contact 108, a third normally open contact 120, a first normally closed contact 110, a second normally closed contact 116; a second contactor including a fourth normally open contact 104, a fifth normally open contact 106, a sixth normally open contact 122, a third normally closed contact 112, and a fourth normally closed contact 114; and an auxiliary switch BG including a seventh normally open contact 124, an eighth normally open contact 130, a fifth normally closed contact 126, and a sixth normally closed contact 128.
In the brake circuit 10, a first end of the first normally open contact 102 and a first end of the fourth normally open contact 104 are connected to a first terminal L of a power supply, a second end of the first normally open contact 102 is connected with a first end of the fifth normally open contact 106 at a node 1, a second end of the fourth normally open contact 104 is connected with a first end of the second normally open contact 108 at a node 2, a rotor coil M of the series excited motor is connected between the node 1 and the node 2, and a second end of the fifth normally open contact 106 is connected with a second end of the second normally open contact 108 at a node 3.
A first end of the third normally open contact 120 and a first end of the sixth normally open contact 122 are connected to the second terminal N of the power supply, and a second end of the third normally open contact 120 and a second end of the sixth normally open contact 122 are connected at a node 4.
A first end of the seventh normally-open contact 124 is connected with a first end of the fifth normally-closed contact 126 at a node 5, a second end of the seventh normally-open contact 124 is connected with a first end of the sixth normally-closed contact 128 at a node 6, a second end of the fifth normally-closed contact 126 is connected with a first end of the eighth normally-open contact 130 at a node 7, a second end of the sixth normally-closed contact 128 is connected with a second end of the eighth normally-open contact 130 at a node 8, a stator coil L of the series motor is connected between the node 5 and the node 8, the node 8 is connected to the fourth node 4, and the node 5 is connected to the node 3;
a first end of the first normally-closed contact 110 is connected to node 1, a second end of the first normally-closed contact 110 is connected to a first end of a third normally-closed contact 112, and a second end of the third normally-closed contact 112 is connected to node 6;
a first end of a second normally-closed contact 116 is connected to node 2, a second end of the second normally-closed contact 116 is connected to a first end of a fourth normally-closed contact 114, and a second end of the fourth normally-closed contact 114 is connected to node 7.
Series machines are used, for example, for operating high-voltage switches. The following describes in detail a specific connection manner of the series excited motor during and after a closing operation of the high voltage switch,
at the beginning of the closing operation, the first normally open contact 102 is closed, the second normally open contact 108 is closed, the third normally open contact 120 is closed, the fourth normally open contact 104 is open, the fifth normally open contact 106 is open, the sixth normally open contact 122 is open, the seventh normally open contact 124 is open, the eighth normally open contact 130 is open, the first normally closed contact 110 is open, the second normally closed contact 116 is open, the third normally closed contact 112 is closed, the fourth normally closed contact 114 is closed, the fifth normally closed contact 126 is closed, and the sixth normally closed contact 128 is closed.
At an intermediate stage during the closing operation, the first normally open contact 102 is closed, the second normally open contact 108 is closed, the third normally open contact 120 is closed, the fourth normally open contact 104 is open, the fifth normally open contact 106 is open, the sixth normally open contact 122 is open, the seventh normally open contact 124 is open, the eighth normally open contact 130 is open, the first normally closed contact 110 is open, the second normally closed contact 116 is open, the third normally closed contact 112 is closed, the fourth normally closed contact 114 is closed, the fifth normally closed contact 126 is open, and the sixth normally closed contact 128 is open.
At the end of the closing operation period, the first normally open contact 102 is closed, the second normally open contact 108 is closed, the third normally open contact 120 is closed, the fourth normally open contact 104 is open, the fifth normally open contact 106 is open, the sixth normally open contact 122 is open, the seventh normally open contact 124 is closed, the eighth normally open contact 130 is closed, the first normally closed contact 110 is open, the second normally closed contact 116 is open, the third normally closed contact 112 is closed, the fourth normally closed contact 114 is closed, the fifth normally closed contact 126 is open, and the sixth normally closed contact 128 is open.
After the closing operation is completed, the first normally open contact 102 is opened, the second normally open contact 108 is opened, the third normally open contact 120 is opened, the fourth normally open contact 104 is opened, the fifth normally open contact 106 is opened, the sixth normally open contact 122 is opened, the seventh normally open contact 124 is opened, the eighth normally open contact 130 is opened, the first normally closed contact 110 is closed, the second normally closed contact 116 is closed, the third normally closed contact 112 is closed, the fourth normally closed contact 114 is closed, the fifth normally closed contact 126 is closed, and the sixth normally closed contact 128 is closed.
Therefore, according to the circuit diagram shown in fig. 1, after the closing operation is completed, the motor is de-energized. Normally open contacts of the first contactor and the second contactor are disconnected, normally closed contacts are closed, and the brake circuit 10 is connected. However, during the closing operation, the normally open contact of the auxiliary switch is closed and the normally closed contact is opened, thereby causing the series direction of the stator coil S of the series motor and the rotor coil M of the series motor to be opposite to the series direction during the closing operation, and thus, the rotor coil M may generate a reverse braking torque and then stop the motor.
In addition, as shown in fig. 1, a resistor R, which may be a current limiting resistor, is further included between the node 2 and the first end of the second normally closed contact 116, and the braking time may be adjusted by adjusting the resistor R.
Further, the first contactor and the second contactor may be a direct current contactor or an alternating current contactor. The power supply may be a 220 volt power supply.
In addition, H-7 can be used for replacing E28S in the carbon brush material for the motor, so that the circulation density is increased, and the stability in the braking process is ensured. And the pressure of the carbon brush spring can be increased, so that the stability of the braking function is improved.
It can be seen from the above solution that, according to the present invention, electronic components such as a rectifier bridge and a time relay are not used, so that the risk of component damage is reduced. And the residual magnetism after the motor is powered off is used for braking instead of being externally connected with a power supply, so that the safety of switching operation can be further improved, and the element cost and the installation space are saved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A braking circuit (10) for a series excited machine comprising a rotor coil (M) and a stator coil (S), the series excited machine being connected between a first terminal (L) and a second terminal (N) of an electric power supply, characterized in that:
the brake circuit (10) has a first connection state and a second connection state,
in the first connection state, a first end of a rotor coil of the series motor is connected to a first terminal of a power supply, a second end of the rotor coil of the series motor is connected to a first end of a stator coil of the series motor, and a second end of the stator coil of the series motor is connected to a second terminal of the power supply;
in the second connection state, the first end of the rotor coil of the series motor is connected to the second end of the stator coil of the series motor, and the first end of the stator coil of the series motor is connected to the second terminal of the rotor coil of the series motor.
2. Brake circuit (10) for a series excited machine according to claim 1, characterized in that the brake circuit comprises a resistor (118) which, in the second connection state, is connected between a first end of the stator coils of the series excited machine and a second end of the rotor coils of the series excited machine.
3. Braking circuit (10) for a series excited machine according to claim 1, characterized in that the braking circuit comprises a contactor and an auxiliary switch,
the contactor includes a first contactor and a second contactor,
the first contactor comprises a first normally open contact (102), a second normally open contact (108), a third normally open contact (120), a first normally closed contact (110) and a second normally closed contact (116);
the second contactor comprises a fourth normally open contact (104), a fifth normally open contact (106), a sixth normally open contact (122), a third normally closed contact (112) and a fourth normally closed contact (114); and
the auxiliary switch comprises a seventh normally open contact (124), an eighth normally open contact (130), a fifth normally closed contact (126) and a sixth normally closed contact (128);
in the brake circuit, a first end of the first normally open contact (102) and a first end of the fourth normally open contact (104) are connected to a first terminal (L) of a power supply, a second end of the first normally open contact (102) and a first end of the fifth normally open contact (106) are connected at a first node, a second end of the fourth normally open contact (104) and a first end of the second normally open contact (108) are connected at a second node, a rotor coil (M) of the series excited motor is connected between the first node and the second node, and a second end of the fifth normally open contact (106) and a second end of the second normally open contact (108) are connected at a third node,
a first end of the third normally open contact (120) and a first end of the sixth normally open contact (122) are connected to a second terminal (N) of a power supply, a second end of the third normally open contact (120) and a second end of the sixth normally open contact (122) are connected at a fourth node,
a first end of the seventh normally open contact (124) is connected with a first end of the fifth normally closed contact (126) at a fifth node, a second end of the seventh normally open contact (124) is connected with a first end of the sixth normally closed contact (128) at a sixth node, a second end of the fifth normally closed contact (126) is connected with a first end of the eighth normally open contact (130) at a seventh node, a second end of the sixth normally closed contact (128) is connected with a second end of the eighth normally open contact (130) at an eighth node, a stator coil (S) of the series motor is connected between the fifth node and the eighth node, the eighth node is connected to the fourth node, and the fifth node is connected to the third node;
a first end of the first normally closed contact (110) is connected to the first node, a second end of the first normally closed contact (110) is connected to a first end of the third normally closed contact (112), and a second end of the third normally closed contact (112) is connected to the sixth node;
a first end of the second normally closed contact (116) is connected to the second node, a second end of the second normally closed contact (116) is connected to a first end of the fourth normally closed contact (114), and a second end of the fourth normally closed contact (114) is connected to the seventh node.
4. A braking circuit (10) for a series excited machine according to claim 3, wherein in the first connection state, the first normally open contact is closed, the second normally open contact is closed, the third normally open contact is closed, the fourth normally open contact is open, the fifth normally open contact is open, the sixth normally open contact is open, the seventh normally open contact is open or closed, the eighth normally open contact is open or closed, the first normally closed contact is open, the second normally closed contact is open, the third normally closed contact is closed, the fourth normally closed contact is closed, the fifth normally closed contact is closed or open, and the sixth normally closed contact is closed or open.
5. The brake circuit (10) for a series excited machine according to claim 3, wherein in the second connection state, the first normally open contact is open, the second normally open contact is open, the third normally open contact is open, the fourth normally open contact is open, the fifth normally open contact is open, the sixth normally open contact is open, the seventh normally open contact is open, the eighth normally open contact is open, the first normally closed contact is closed, the second normally closed contact is closed, the third normally closed contact is closed, the fourth normally closed contact is closed, the fifth normally closed contact is closed, and the sixth normally closed contact is closed.
6. Braking circuit (10) for a series excited machine according to claim 1, characterized in that the braking circuit is in the first connection state during a closing operation of the series excited machine.
7. Brake circuit (10) for a series excited machine according to claim 4, wherein the brake circuit is in the second connection state after a closing operation of the series excited machine.
8. Brake circuit (10) for a series excited machine according to claim 2, wherein the resistor is a current limiting resistor.
9. A brake circuit (10) for a series excited machine according to claim 3, wherein the first contactor is a dc contactor or an ac contactor.
10. A brake circuit (10) for a series excited machine according to claim 3, wherein the second contactor is a dc contactor or an ac contactor.
11. A series excited machine, characterized in that: brake circuit for a series excited machine comprising a brake circuit according to any of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222550755.1U CN218499032U (en) | 2022-09-26 | 2022-09-26 | Brake circuit for series excited motor and series excited motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222550755.1U CN218499032U (en) | 2022-09-26 | 2022-09-26 | Brake circuit for series excited motor and series excited motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218499032U true CN218499032U (en) | 2023-02-17 |
Family
ID=85193248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222550755.1U Active CN218499032U (en) | 2022-09-26 | 2022-09-26 | Brake circuit for series excited motor and series excited motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218499032U (en) |
-
2022
- 2022-09-26 CN CN202222550755.1U patent/CN218499032U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101690000B1 (en) | Electric motor with brake | |
| WO2015004948A1 (en) | Discharge control device | |
| EP2054998A1 (en) | A drive system for a tap changer | |
| KR101068155B1 (en) | Magnetic contactor with a driving device for controlling an actuator | |
| CN1934777B (en) | Driving device and braker | |
| CN107170594B (en) | A kind of circuit for controlling motor of three-position switch operation mechanism | |
| EP2940844A1 (en) | Bypass apparatus for converter | |
| US10283297B2 (en) | Switching device for a wye-delta switch in a multiphase motor | |
| CN111953264A (en) | Synchronous motor control circuit | |
| CN110612589A (en) | Connection unit | |
| US10978258B2 (en) | Direct current circuit breaker device | |
| JP2010207010A (en) | Coil switching device of three-phase ac motor drive system | |
| CN218499032U (en) | Brake circuit for series excited motor and series excited motor | |
| WO2017068764A1 (en) | Electromagnetic relay | |
| CN108573828B (en) | Switching device for medium-voltage switchgear assemblies | |
| JP2014165956A (en) | Rotary electric machine drive device | |
| CN106601512A (en) | Automatic diverter switch electrical appliance | |
| JP2005168294A (en) | Reciprocating motor | |
| CN108550503A (en) | A kind of D.C. contactor | |
| CN105448603B (en) | A kind of contactless electromagnetic switch and electromagnetic linear motor formula sectional power supply switching device | |
| JPH0119206B2 (en) | ||
| US8970330B2 (en) | Contactor | |
| CN103198977A (en) | Contactor coil power supply circuit | |
| KR101716686B1 (en) | motor control center with magnetic contactor driven permament magnet | |
| JP5117438B2 (en) | Power supply circuit for lifting magnet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |