CN111835140B - Armature component and application thereof - Google Patents
Armature component and application thereof Download PDFInfo
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- CN111835140B CN111835140B CN202010796992.9A CN202010796992A CN111835140B CN 111835140 B CN111835140 B CN 111835140B CN 202010796992 A CN202010796992 A CN 202010796992A CN 111835140 B CN111835140 B CN 111835140B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
- H02K7/1021—Magnetically influenced friction brakes
- H02K7/1023—Magnetically influenced friction brakes using electromagnets
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Abstract
The application belongs to the technical field of automation, and particularly relates to an armature assembly and application thereof. In a traditional electromagnetic power-off brake or a permanent magnet brake, the electromagnetic brake has slow response when power is off due to the fact that the mass of an armature is too large; in an electromagnetic power-off brake and a permanent magnet brake, the power is high because a large current is needed to generate magnetic force to attract an armature; the permanent magnet brake has reduced braking torque due to leakage flux during operation. The application provides an armature subassembly, including armature, armature is connected with non-magnetic conduction ring, armature is connected with the yoke, armature with be provided with the permanent magnet between the yoke. The quality of the armature can be effectively reduced, the response time of the brake is shortened, the magnetic leakage of the permanent magnet is reduced, and the problem of braking torque reduction caused by abrasion of the friction plate is solved.
Description
Technical Field
The application belongs to the technical field of automation, and particularly relates to an armature assembly and application thereof.
Background
At present, motor brakes are mainly divided into electromagnetic power-off brakes, motor excitation brakes, permanent magnet brakes and magnetic powder brakes. The motor excitation brake and the magnetic powder brake can realize the braking of the motor only by an external power supply when the motor brakes, and the electromagnetic power-off brake and the permanent magnet brake can make the friction plate contact with the armature through the elastic force of the spring or the magnetic force of the permanent magnet under the condition of power failure of the external power supply, so that the braking torque is generated. The working condition of the brake is that the brake is in accordance with an electromagnetic power-off brake and a permanent magnet brake when the external power supply is powered off. Therefore, the innovativeness of the application is mainly compared with an electromagnetic power-off brake and a permanent magnet brake.
The working principle of the existing electromagnetic power-off brake is as follows: when the motor starts to work, the coil of the brake generates current and generates a magnetic field on the magnetic yoke, and then the magnetic field on the magnetic yoke attracts the armature and leaves the friction plate on the brake disc, so that the motor can run without friction. When the motor is braked, the power supply is cut off, the current on the coil is attenuated, so that the magnetic force is reduced, and the armature is bounced off by the elasticity of the spring and is contacted with a friction plate of the brake disc to generate braking torque, so that the motor is quickly stopped. When the motor is started, the coil is electrified to generate a magnetic field opposite to the permanent magnet and offset with the magnetic field generated by the permanent magnet, and then the armature is pulled back from the friction sheet by the plate-shaped spring on the hub of the motor, so that the motor can run without friction. When the motor starts to brake, the power supply is cut off, the current is quickly attenuated, and the armature is attracted by the permanent magnet to be in contact with the friction plate, so that the motor is quickly braked.
In a traditional electromagnetic power-off brake or a permanent magnet brake, the electromagnetic brake has slow response when power is off due to the fact that the mass of an armature is too large; in an electromagnetic power-off brake and a permanent magnet brake, the power is high because a large current is needed to generate magnetic force to attract an armature; the permanent magnet brake has reduced braking torque due to leakage flux during operation.
Disclosure of Invention
1. Technical problem to be solved
The electromagnetic brake is slow in response when power is cut off due to the fact that the mass of the armature is too large in the traditional electromagnetic power-off brake or the traditional permanent magnet brake; in an electromagnetic power-off brake and a permanent magnet brake, the power is high because a large current is needed to generate magnetic force to attract an armature; the application provides an armature assembly and application thereof, which solve the problem that braking torque is reduced due to magnetic leakage in the operation of a permanent magnet brake.
2. Technical scheme
In order to achieve the above object, the present application provides an armature assembly, including an armature, the armature is connected with a friction plate, the armature is connected with a yoke, a brake coil is arranged on the yoke, and a permanent magnet is arranged between the armature and the yoke.
Another embodiment provided by the present application is: the armature is connected with the non-magnetic conductive circular ring, and the non-magnetic conductive circular ring is connected with the friction plate.
Another embodiment provided by the present application is: the armature iron is connected with the non-magnetic conductive circular ring through gluing, welding, interference fit, pins, bolts or clamping grooves.
Another embodiment provided by the present application is: the armature iron is attached to the magnetic yoke through clearance fit.
Another embodiment provided by the present application is: the non-magnetic conductive ring is an aluminum block.
Another embodiment provided by the present application is: the armature is nested on the non-magnetic conductive circular ring and is made of a composite material of a non-magnetic conductive material and iron.
The application also provides application of the armature assembly to a brake or a clutch.
Another embodiment provided by the present application is: the non-magnetic conductive ring is in clearance fit with the shell.
Another embodiment provided by the present application is: the length of an air gap between the armature and the magnetic yoke is equal to the length of the space distance between the armature and the magnetic yoke.
The application further provides an armature component application circuit, which comprises a direct-current voltage source, a switch, a first resistor, a brake coil, a second resistor and a diode which are sequentially connected, wherein the diode is connected with the direct-current voltage source, the switch is connected with a capacitor, the capacitor is connected with a third resistor, the third resistor is connected with the direct-current voltage source, and the third resistor is connected with the diode; the diode is connected with the normally closed delay disconnecting switch, the normally closed delay disconnecting switch is connected with the brake coil, and the normally closed delay disconnecting switch is connected with the second resistor.
3. Advantageous effects
Compared with the prior art, the beneficial effect of the stopper that this application provided lies in:
the application of the armature component is a novel electromagnetic power-off brake.
The application provides an armature subassembly can effectively reduce armature quality for response time when stopper braking reduces the permanent magnet magnetic leakage, and solves because friction disc wearing and tearing lead to braking torque decline problem.
The application of the armature subassembly that this application provided, when the motor starts, the armature is held to the electromagnetic force that produces through the coil, realizes the frictionless operation of motor. When the brake is powered off, the brake relies on the magnetic force of the permanent magnet to realize that the armature is contacted with the friction plate so as to generate brake torque.
The application of the armature subassembly that this application provided has carried out the independent design to armature and magnetic circuit, makes its lower surface and yoke laminating radially between, reduces the air gap, and increase magnetic density, then armature opposite side and yoke other end laminating produce axial magnetic force. Through the design scheme, the braking torque of the brake can be effectively ensured under the condition that the volume of the armature is reduced.
The application of the armature component provided by the application designs a brake circuit, and a normally closed time-delay disconnection switch is added in the circuit, so that when the brake is switched on, a coil is introduced with large current and generates a large magnetic field to suck the armature; when the armature is successfully sucked and attached to the magnetic yoke, the normally closed time-delay disconnecting switch is automatically disconnected, so that the brake coil is connected with the large resistor in parallel, the working current of the brake is reduced, and the reduction of the power and the heating of the brake is realized.
The application provides an armature subassembly, thereby realize reducing the mechanical structure of magnetic circuit air gap through the cooperation between armature and yoke.
According to the armature assembly, the permanent magnet is used for replacing a spring, and the permanent magnet is arranged between the magnet yoke and the armature; the permanent magnet flux linkage forms a closed-loop structure through the permanent magnet, the armature and the magnetic yoke; and meanwhile, a coil flux linkage forms a closed loop through a magnetic yoke, an air gap and an armature.
According to the armature assembly, the armature pushes the friction plate to form braking through the non-magnetic conductive circular ring.
The application circuit of armature subassembly that this application provided relies on normally closed time delay disconnection switch to realize the circuit that coil current reduces.
According to the armature assembly, through the optimized design of the armature, the mass of the armature can be reduced by more than 50%, and the response speed of a system is higher when a brake is used for braking.
The application circuit of armature subassembly that this application provided, the control circuit to this stopper very much makes it when the stable during operation of stopper, effectively reduces stopper operating current, and then realizes stopper power and generate heat and reduce to effectively prevent the local high temperature short circuit of circuit, permanent magnet high temperature demagnetization phenomenon.
Drawings
FIG. 1 is a schematic diagram of a permanent magnet field loop of the brake of the present application in a braking condition;
FIG. 2 is a schematic diagram of the coil field circuit during a non-braking state (activated) of the brake of the present application;
FIG. 3 is a schematic view of a portion of the brake of the present application;
FIG. 4 is a schematic view of the armature design of the present application;
FIG. 5 is a schematic view of the magnetic circuit air gap of the present application;
FIG. 6 is a schematic illustration of the brake operating air gap braking state of the present application;
FIG. 7 is a schematic illustration of the brake apply air gap non-braking condition of the present application;
FIG. 8 is a schematic of the brake circuit of the present application;
FIG. 9 is a second structural schematic of the brake of the present application;
FIG. 10 is a schematic view of a first perspective of the brake space of the present application;
FIG. 11 is a schematic view of a second perspective of the brake space of the present application;
FIG. 12 is a brake armature force diagram of the present application;
FIG. 13 is a brake armature displacement diagram of the brake of the present application;
fig. 14 is a motor actuated armature diagram of the present application;
FIG. 15 is a graph of armature displacement at start-up of the motor of the present application;
FIG. 16 is a field strength profile of the motor activated brake of the present application;
FIG. 17 is a magnetic field strength profile of the electric motor brake of the present application;
in the figure: 1-armature, 2-non-magnetic-conductive circular ring, 3-magnetic yoke, 4-permanent magnet, 5-casing, 6-direct current voltage source, 7-switch, 8-brake coil, 9-first resistor, 10-diode, 11-capacitor, 12-normally closed time-delay open switch, 13-second resistor, 14-third resistor, 15-brake casing and 16-friction plate.
Detailed Description
Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, and it will be apparent to those skilled in the art from this detailed description that the present application can be practiced. Features from different embodiments may be combined to yield new embodiments, or certain features may be substituted for certain embodiments to yield yet further preferred embodiments, without departing from the principles of the present application.
a. The traditional electromagnetic power-off brake and the permanent magnet brake have the problem that the armature quality is overlarge, so that the acceleration of the armature is reduced under the same attraction action.
b. The traditional electromagnetic power-off brake can cause friction plate abrasion due to multiple operations, further causes the increase of an air gap between an armature and a magnetic yoke in the brake, reduces the magnetic field intensity, reduces the magnetic force and reduces the braking torque.
c. When the permanent magnet brake works, a magnetic field loop as shown in fig. 3 exists, the magnetic leakage of the permanent magnet is increased, and particularly, when an air gap between the armature and the magnetic yoke is increased, the magnetic leakage is more remarkable.
d. When the armature is released, the permanent magnet brake needs the coil to generate a magnetic field opposite to the permanent magnet, so that the permanent magnet can be demagnetized if the magnetic field of the coil is too large.
Referring to fig. 1 to 17, the present application provides an armature assembly, including an armature 1, the armature 1 is connected with a friction plate 16, the armature 1 is connected with a yoke 3, a brake coil 8 is arranged on the yoke 3, and a permanent magnet 4 is arranged between the armature 1 and the yoke 3. The brake coil 8 is wound on the yoke 3.
In the scheme, the armature 1 is in direct contact with the friction plate 16 for braking.
The application also provides an armature subassembly, including armature 1, armature 1 is connected with non-magnetic conduction ring 2, non-magnetic conduction ring 2 with friction disc 16 is connected, armature 1 is connected with yoke 3, be provided with brake coil 8 on yoke 3, armature 1 with be provided with permanent magnet 4 between yoke 3.
The brake coil 8 is wound on the yoke 3.
Further, the armature 1 is nested on the non-magnetic conductive ring 2.
Further, the armature 1 and the non-magnetic conductive ring 2 are connected by gluing, welding, interference fit, pins, bolts or clamping grooves.
Further, the armature 1 is attached to the yoke 3 by a clearance fit.
Further, the non-magnetic conductive ring 2 is an aluminum block.
The conventional brake armature 1 is sufficiently fitted to the yoke 3 so that its cross-sectional area is substantially equal to that of the yoke 3. Therefore, the traditional design can ensure the contact area between the armature 1 and the magnetic yoke 3, and simultaneously, the mass of the armature 1 is remarkably increased, and the response speed of the brake in the braking process is sacrificed.
The present application improves upon the construction of the brake armature 1 (as shown) in response to the deficiencies of conventional designs. Wherein, the outer ring of the armature 1 is nested on the non-magnetic conductive ring 2, and the armature is connected with the light non-magnetic conductive ring 2 by gluing, welding, interference fit, pin, bolt, clamping groove and other modes (in the braking process of the motor, the armature 1 moves leftwards by the attraction of the permanent magnet 4 and extrudes the non-magnetic conductive ring 2 to contact with the friction plate 16 to realize braking, the joint surface between the armature 1 and the non-magnetic conductive ring 2 is stressed by pressure, in the working state (non-braking state) of the motor, the armature 1 is stressed by right electromagnetic force and is attached to the magnetic yoke 3 on the right side, the joint surface between the armature 1 and the non-magnetic conductive ring 2 is not stressed in the process, therefore, the joint surface between the armature 1 and the non-magnetic conductive ring 2 can not be damaged by overlarge tensile stress, the non-magnetic conductive ring 2 plays a role of increasing the braking area of the friction plate 16, because the end area of the armature 1 is small, the armature can only be partially contacted with the friction plate 16, so that the unit area of compressive stress on the friction plate 16 is increased, the abrasion of the friction plate 16 is accelerated, and the effect of reducing the abrasion of the friction plate 16 is achieved by increasing the contact area with the friction plate 16 by adding the non-magnetic-conductive circular ring 2. The size of the non-magnetic conductive ring 2 needs to be designed to reduce the volume as much as possible under the condition of ensuring the structural strength).
Further, the armature 1 is made of a composite material of a non-magnetic conductive material and iron.
A method of reducing the mass of the armature 1 by using a composite material of aluminium and iron, wherein aluminium may be substituted for any other non-magnetic material.
The application also provides application of the armature assembly to a brake or a clutch.
When the motor is in a static or braking state, the working principle is as shown in the figure: permanent magnet 4 (permanent magnet 4 is fixed on yoke 3, does not take place the displacement in work) produces the magnetic field (as the arrow shows) and attracts armature 1 to move left, then armature 1 promotes left aluminium pig and makes friction disc 16 on the motor output shaft contact with aluminium pig and motor casing respectively, thereby produce braking torque and make the motor stall (in the design, this application has designed safe distance between permanent magnet and armature, when realizing that aluminium pig and friction disc 16 contact braking, still there is certain distance between permanent magnet 4 and armature 1, and then guaranteed that permanent magnet 4 can not receive the striking and damage).
When the motor is in a starting state, the working principle is as shown in the figure: the coil is electrified to generate a magnetic field (shown as an arrow) on the magnetic yoke 3, the magnetic field generated by the coil overcomes the magnetic field force generated by the permanent magnet and enables the armature 1 and the aluminum block to move rightwards, so that the aluminum block is separated from the friction plate 16, and the frictionless rotation of the motor is realized. Meanwhile, the armature 1 and the non-magnetic conductive circular ring 2 move rightwards, so that an air gap between the permanent magnet 4 and the armature 1 in the figure 1 is increased, the magnetic resistance of a magnetic field loop shown in the figure 1 is increased, and the braking force generated by the magnetic force of the permanent magnet 4 is further reduced.
Further, the non-magnetic conductive ring 2 is in clearance fit with the brake housing 15. As shown in the figure, the inner ring of the armature 1 is attached to the magnetic yoke 3 in a clearance fit mode, so that the magnetic resistance is reduced, and the magnetic field intensity is improved. The outer ring of the non-magnetic conductive circular ring 2 is in clearance fit with the inner wall of the brake shell 15, and the armature 1 and the non-magnetic conductive circular ring 2 can normally slide in the inner wall of the brake shell 15.
Further, the length of the air gap between the armature 1 and the magnetic yoke 3 is equal to the length of the space distance between the armature 1 and the magnetic yoke 3. Compared with a traditional electromagnetic power-off brake and a permanent magnet brake, the quality of the armature 1 is obviously reduced. In addition, the air gap contrast tradition electromagnetism between armature 1 and yoke 3 loses the electric brake and obviously reduces in this application (in the tradition electromagnetism loses the electric brake, the air gap length between armature 1 and yoke 3 is the twice of armature 1 and 3 space distance length of yoke, the air gap length between armature 1 and yoke 3 in this application equals armature 1 and 3 space distance length of yoke), consequently this application is through reducing the air gap, thereby reduce the magnetic resistance, increase magnetic field intensity, realize the magnetic field power increase between armature 1 and yoke 3.
The application further provides an armature component application circuit, which comprises a direct current voltage source 6, a switch 7, a first resistor 9, a brake coil 8, a second resistor 13 and a diode 10 which are sequentially connected, wherein the diode 10 is connected with the direct current voltage source 6, the switch 7 is connected with a capacitor 11, the capacitor 11 is connected with a third resistor 14, the third resistor 14 is connected with the direct current voltage source 6, and the third resistor 14 is connected with the diode 10; the diode 10 is connected with a normally closed time-delay disconnecting switch 12, the normally closed time-delay disconnecting switch 12 is connected with the brake coil 8, and the normally closed time-delay disconnecting switch 12 is connected with the second resistor 13. The circuit design of the scheme can be used for the brake with the permanent magnet 4 and can also be used for a traditional electromagnetic power-off brake.
When the motor is ready to start, the air gap between the permanent magnet 4 and the armature 1 is small, and the air gap between the yoke 3 and the armature 1 is large, so that a large current needs to be introduced into the brake coil 8 to attract the armature 1. When the motor is started and the brake enters a steady state, the air gap between the magnet yoke 3 and the armature 1 is obviously reduced (as shown in the figure), and the air gap between the permanent magnet 4 and the armature 1 is increased, so that the brake can attract the magnet yoke 3 to the armature 1 only by small current, and the motor can be ensured to run stably without friction.
In addition, if the brake current is large, the formula of joule heat is used
Q＝I2R
The brake coil 8 will generate a lot of heat. If the temperature of the brake rises, the insulation layer of the brake coil 8 is damaged due to overheating, and the permanent magnet 4 is demagnetized due to overhigh temperature. Therefore, in order to solve the above problems, the present application designs a new brake circuit, when the motor is started, the switch 7 is closed, the normally closed time-delay opening switch 12 is kept in a closed state, and the current flows from the positive pole of the dc voltage source 6 to the negative pole of the dc voltage source 6 through the first resistor 9, the brake coil 8, the normally closed time-delay opening switch 12, the diode 10. After the circuit is conducted for a certain time, the normally closed delay disconnection switch 12 is disconnected, the second resistor 13 is connected with the brake coil 8 in series, and the resistor in the circuit is increased, so that the working current of the circuit is reduced, and the power and the heat of the brake are reduced.
In addition, if the brake operating current is reduced, when the motor is de-energized and braked, the current can be more quickly reduced to the critical value (namely, the attraction force of the brake coil 8 to the armature 1 is equal to the attraction force of the permanent magnet 4 to the armature 1), thereby further reducing the brake braking time.
When the motor is braked, the switch 7 is opened. An LC oscillating circuit is formed between the brake and the capacitor 11, so that the brake coil 8 can discharge electricity rapidly, and the brake brakes rapidly. The third resistor 14 acts as a protection capacitor, as shown in the following formula:
Q＝ψf/R
U＝Q/C
if the resistor R is increased, the charge Q will decrease, and the voltage U across the capacitor C will decrease, thus acting as a protection capacitor.
The feasibility of the application on the magnetic circuit design is proved by carrying out electromagnetic field finite element simulation on the brake by Maxwell (as shown in figures 12, 13, 14, 15, 16 and 17). As shown in fig. 12 and 13, the brake can realize braking response within 6ms, which is far lower than the braking response time of a traditional brake (30 ms is required for the same size brake). Brake during braking, the permanent magnet 4 may generate a positive pressure of 1967N against the armature 1. If the coefficient of friction plate 16 is chosen to be 0.43, as is conventional, the brake can generate 102Nm of braking torque, which is higher than 80Nm of friction torque of a conventional brake of the same size. As shown in fig. 14 and 15, when the motor is started, the brake can separate the armature 1 from the friction plate 16 in about 180 ms. Therefore, simulation verification shows that the electromagnetic power-off brake can achieve the effects of quick braking response and slow starting.
Although the present application has been described above with reference to specific embodiments, those skilled in the art will recognize that many changes may be made in the configuration and details of the present application within the principles and scope of the present application. The scope of protection of the application is determined by the appended claims, and all changes that come within the meaning and range of equivalency of the technical features are intended to be embraced therein.
Claims (8)
1. An armature assembly, characterized by: the brake device comprises an armature, wherein the armature is connected with a friction plate, the armature is connected with a magnetic yoke, a brake coil is arranged on the magnetic yoke, and a permanent magnet is arranged between the armature and the magnetic yoke, so that a permanent magnet flux linkage forms a closed loop structure through the permanent magnet, the armature and the magnetic yoke, and a coil flux linkage forms a closed loop through the magnetic yoke, an air gap and the armature; the armature is connected with the non-magnetic conductive circular ring, and the non-magnetic conductive circular ring is connected with the friction plate; the length of an air gap between the armature and the magnetic yoke is equal to the length of the space distance between the armature and the magnetic yoke;
in the braking process of the motor, the armature moves under the attraction of the permanent magnet and extrudes the non-magnetic conductive circular ring to enable the non-magnetic conductive circular ring to be in contact with the friction plate so as to realize braking, and the junction surface between the armature and the non-magnetic conductive circular ring is subjected to compressive stress; in the working state of the motor, the armature is electrified by electromagnetic force and is attached to the magnetic yoke, and the joint surface between the armature and the non-magnetic conductive circular ring is not stressed.
2. The armature assembly of claim 1, wherein: the armature iron is connected with the non-magnetic conductive circular ring through gluing, welding, interference fit, pins, bolts or clamping grooves.
3. The armature assembly of claim 1, wherein: the armature is in clearance fit with the magnetic yoke.
4. An armature assembly according to any of claims 1 to 3, wherein: the non-magnetic conductive ring is an aluminum block.
5. The armature assembly of claim 1, wherein: the armature is nested on the non-magnetic conductive circular ring and is made of a composite material of a non-magnetic conductive material and iron.
6. Use of an armature assembly, characterized by: applying the armature assembly of any of claims 1-5 to a brake or clutch.
7. Use of an armature assembly according to claim 6, wherein: the non-magnetic conductive ring is in clearance fit with the brake shell.
8. An armature assembly application circuit, comprising: applying the armature assembly of any of claims 1-5 to an armature assembly application circuit, comprising a dc voltage source, a switch, a first resistor, a brake coil, a second resistor, and a diode connected in series, the diode connected to the dc voltage source, the switch connected to a capacitor, the capacitor connected to a third resistor, the third resistor connected to the dc voltage source, the third resistor connected to the diode; the diode is connected with the normally closed delay disconnecting switch, the normally closed delay disconnecting switch is connected with the brake coil, and the normally closed delay disconnecting switch is connected with the second resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010796992.9A CN111835140B (en) | 2020-08-10 | 2020-08-10 | Armature component and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010796992.9A CN111835140B (en) | 2020-08-10 | 2020-08-10 | Armature component and application thereof |
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| CN111835140A CN111835140A (en) | 2020-10-27 |
| CN111835140B true CN111835140B (en) | 2022-02-01 |
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| CH580879A5 (en) * | 1975-11-20 | 1976-10-15 | Quick Rotan Becker & Notz Kg | Motor with clutch and brake disc - has hubs for clutch and brake discs on drive shaft with spring elements provided with cooling air passages |
| JPS6364540A (en) * | 1986-08-30 | 1988-03-23 | Hitachi Ltd | Electric motor |
| US5533425A (en) * | 1992-03-05 | 1996-07-09 | Easom Engineering And Manufacturing Corporation | Electrically actuated disc stack having low response time due to reduced residual magnetism for use in drives, brakes and combinations thereof |
| EP0911536A1 (en) * | 1997-10-21 | 1999-04-28 | Dana Corporation | Wrap spring clutch assembly |
| CH694134A5 (en) * | 1998-12-04 | 2004-07-30 | Zahnradfabrik Friedrichshafen | Electromagnetically operated Einflächenkupplung or face brake. |
| CN2630562Y (en) * | 2003-06-20 | 2004-08-04 | 郑建安 | Electromagnetic brake |
| CN201294424Y (en) * | 2008-10-30 | 2009-08-19 | 芜湖大中机电制造有限公司 | Novel work gap motor |
| CN206361052U (en) * | 2016-09-27 | 2017-07-28 | 株式会社安川电机 | A kind of electromagnetic brake and motor |
| CN110332261A (en) * | 2019-05-22 | 2019-10-15 | 深圳市科力尔电机有限公司 | A kind of composite excitation braking method and its brake |
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2020
- 2020-08-10 CN CN202010796992.9A patent/CN111835140B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB706382A (en) * | 1952-07-04 | 1954-03-31 | Vaino Alexander Hoover | Improvements in or relating to clutches |
| CH580879A5 (en) * | 1975-11-20 | 1976-10-15 | Quick Rotan Becker & Notz Kg | Motor with clutch and brake disc - has hubs for clutch and brake discs on drive shaft with spring elements provided with cooling air passages |
| JPS6364540A (en) * | 1986-08-30 | 1988-03-23 | Hitachi Ltd | Electric motor |
| US5533425A (en) * | 1992-03-05 | 1996-07-09 | Easom Engineering And Manufacturing Corporation | Electrically actuated disc stack having low response time due to reduced residual magnetism for use in drives, brakes and combinations thereof |
| EP0911536A1 (en) * | 1997-10-21 | 1999-04-28 | Dana Corporation | Wrap spring clutch assembly |
| CH694134A5 (en) * | 1998-12-04 | 2004-07-30 | Zahnradfabrik Friedrichshafen | Electromagnetically operated Einflächenkupplung or face brake. |
| CN2630562Y (en) * | 2003-06-20 | 2004-08-04 | 郑建安 | Electromagnetic brake |
| CN201294424Y (en) * | 2008-10-30 | 2009-08-19 | 芜湖大中机电制造有限公司 | Novel work gap motor |
| CN206361052U (en) * | 2016-09-27 | 2017-07-28 | 株式会社安川电机 | A kind of electromagnetic brake and motor |
| CN110332261A (en) * | 2019-05-22 | 2019-10-15 | 深圳市科力尔电机有限公司 | A kind of composite excitation braking method and its brake |
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|---|---|
| CN111835140A (en) | 2020-10-27 |
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