CN113839585B - Brake control circuit, device and equipment - Google Patents
Brake control circuit, device and equipment Download PDFInfo
- Publication number
- CN113839585B CN113839585B CN202111217400.4A CN202111217400A CN113839585B CN 113839585 B CN113839585 B CN 113839585B CN 202111217400 A CN202111217400 A CN 202111217400A CN 113839585 B CN113839585 B CN 113839585B
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- relay
- switch
- contact
- power supply
- coil
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- 101150037899 REL1 gene Proteins 0.000 description 13
- 101100099158 Xenopus laevis rela gene Proteins 0.000 description 13
- 101100153768 Oryza sativa subsp. japonica TPR2 gene Proteins 0.000 description 12
- 101150102021 REL2 gene Proteins 0.000 description 12
- 238000000034 method Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/08—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing a dc motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/30—Operating devices electrical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The application provides a brake control circuit, a brake control device and brake control equipment. In the circuit, the negative pole of the power supply unit is connected with the negative pole of the output unit, the positive pole of the power supply unit is connected with one end of a normally open contact of a third relay, the other end of the normally open contact of the third relay is connected with the positive pole of the output unit, a coil of the third relay is connected with a software control end, the software control end is also connected with a first switch and a second switch respectively, the anode of the battery unit is connected with one end of the first relay coil, the other end of the first relay coil is connected with the negative pole of the output unit through the second switch, and is connected with the cathode of the battery unit at the same time, one end of the normally open contact of the first relay is connected with the anode of the battery unit through the first switch, the other end of the normally open contact of the first relay is connected with one end of a normally closed contact of the second relay, the other end of the normally closed contact of the second relay is connected with the positive pole of the output unit, and the coil of the second relay is connected with a system power supply.
Description
Technical Field
The application relates to the technical field of engineering machinery, in particular to a brake control circuit, a brake control device and brake control equipment.
Background
The tower crane is the most commonly used lifting equipment on the building site, also called tower crane, and is provided with three mechanisms of lifting, turning and luffing, and the lifting, turning and luffing motors are respectively controlled to move the goods up and down, left and right, front and back in space. The rotary brake is a necessary component of the rotary motor, controls the stop brake of the tower crane large arm, and is an important ring in the control of the tower crane.
The rotary brake is divided into a normally open brake and a normally closed brake according to the mechanical structure of the rotary motor, wherein the normally open brake is a large arm of the tower crane locked by the brake when the power is supplied, the large arm is released when the power is stopped, and the normally closed brake is opposite to the large arm, the large arm is released when the power is supplied, and the large arm of the tower crane is locked by the brake when the power is stopped. At present, tower crane manufacturers design control circuits for two braking modes respectively, namely, a control circuit is designed for normally open braking and used for controlling normally open braking, and a control circuit is designed for normally closed braking and used for controlling normally closed braking.
However, the control circuit is designed for the normally open brake and the normally closed brake respectively for control, and the production cost is relatively high.
Disclosure of Invention
An aim of the embodiment of the application is to provide a brake control circuit, a device and equipment, so as to solve the problem that the production cost is higher when the control circuit is respectively designed for normally open type brake and normally closed type brake for control. The specific technical scheme is as follows:
in a first aspect, there is provided a brake control circuit, the circuit comprising: the power supply unit, the battery unit, the control unit, the output unit and the software control end, wherein the control unit comprises a first relay, a second relay, a third relay, a first switch and a second switch;
the negative electrode of the power supply unit is connected with the negative electrode of the output unit, the positive electrode of the power supply unit is connected with one end of a normally open contact of a third relay, the other end of the normally open contact of the third relay is connected with the positive electrode of the output unit, a coil of the third relay is connected with the software control end, the software control end is also connected with the first switch and the second switch respectively, the anode of the battery unit is connected with one end of a coil of the first relay, the other end of the coil of the first relay is connected with the negative electrode of the output unit through the second switch, and is connected with the negative electrode of the battery unit at the same time, one end of the normally open contact of the first relay is connected with the anode of the battery unit through the first switch, the other end of the normally open contact of the first relay is connected with one end of a normally closed contact of the second relay, the other end of the normally closed contact of the second relay is connected with the positive electrode of the output unit, and the coil of the second relay is connected with a system power supply;
when the first switch is closed, the control circuit is switched to a normally open braking mode, and when the first switch is opened, the control circuit is switched to a normally closed braking mode.
In one possible embodiment, the first switch comprises a first contact and a second contact, the second switch comprises a third contact and a fourth contact,
one end of the first contact is connected with the anode of the battery unit, the other end of the first contact is connected with the normally open contact of the first relay, and the second contact is connected with the software control end;
one end of the third contact is connected with the coil of the first relay, the other end of the third contact is connected with the negative electrode of the output unit and also connected with the negative electrode of the battery unit, and the fourth contact is connected with the software control end.
In one possible embodiment, the battery unit includes a battery, a first resistor, a first diode and a third switch,
one end of the third switch is connected with the positive electrode of the power supply unit, the other end of the third switch is connected with the anode of the first diode, the cathode of the first diode is connected with the anode of the battery through the first resistor, the anode of the battery is connected with the coil of the first relay, and the third switch is also connected with the normally open contact of the first relay through the first switch; the cathode of the battery is connected with the cathode of the power supply unit and also connected with the cathode of the output unit;
when the third switch is closed, the power supply unit charges the battery through the third switch, the first diode and the first resistor.
In one possible embodiment, the output unit comprises a brake coil, a second diode and a second resistor,
the positive electrode of the brake coil is connected with one end of a normally-closed contact of the second relay, and is also connected with one end of a normally-open contact of the third relay, and the negative electrode of the brake coil is connected with the negative electrode of the power supply unit and is also connected with one end of the second switch; the second diode is connected in series with the second resistor and then connected in parallel with two ends of the brake coil for freewheeling of the brake coil.
In one possible embodiment, the power supply unit comprises an ac power source and a rectifier bridge,
the alternating current power supply is rectified by the rectifier bridge, the anode of the alternating current power supply is connected with the battery unit and the third relay respectively, and the cathode of the alternating current power supply is connected with the cathode of the output unit.
In a second aspect, there is provided a brake control device comprising a brake control circuit according to the first aspect.
In a third aspect, there is provided an apparatus comprising a brake control device according to the second aspect.
The beneficial effects of the embodiment of the application are that:
the embodiment of the application provides a brake control circuit, a device and equipment, wherein the circuit comprises: the power supply unit, the battery unit, the control unit, the output unit and the software control end, wherein the control unit comprises a first relay, a second relay, a third relay, a first switch and a second switch; the negative electrode of the power supply unit is connected with the negative electrode of the output unit, the positive electrode of the power supply unit is connected with one end of a normally open contact of a third relay, the other end of the normally open contact of the third relay is connected with the positive electrode of the output unit, a coil of the third relay is connected with the software control end, the software control end is also connected with the first switch and the second switch respectively, the anode of the battery unit is connected with one end of a coil of the first relay, the other end of the coil of the first relay is connected with the negative electrode of the output unit through the second switch, and is connected with the negative electrode of the battery unit at the same time, one end of the normally open contact of the first relay is connected with the anode of the battery unit through the first switch, the other end of the normally open contact of the first relay is connected with one end of a normally closed contact of the second relay, the other end of the normally closed contact of the second relay is connected with the positive electrode of the output unit, and the coil of the second relay is connected with a system power supply; when the first switch is closed, the control circuit is switched to a normally open braking mode, and when the first switch is opened, the control circuit is switched to a normally closed braking mode.
Through this application, can utilize a control circuit to realize opening always and normally closed formula gyration brake, for the control circuit of design respectively to opening always braking and normally closed formula brake, reduced manufacturing cost and later maintenance's maintenance cost, in practical application, two kinds of brake modes are controlled through a control circuit, have reduced the use degree of difficulty, make things convenient for the user to operate.
Of course, not all of the above-described advantages need be achieved simultaneously in practicing any one of the products or methods of the present application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a circuit diagram of a brake control circuit according to an embodiment of the present application.
Wherein reference numerals are as follows:
d1: a rectifier bridge; k1: a third switch; d2: a first diode; r1: a first resistor; e1: a battery; k2: a first contact; and K5: a second contact; k3: a third contact; and K4: a fourth contact; REL1: a first relay; REL2: a second relay; REL3: a third relay; d3: a second diode; r2: a second resistor; l1: and a brake coil.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The present application is described in further detail below with reference to the attached drawing figures and detailed description: as shown in fig. 1, the present application discloses a brake control circuit, the circuit includes: the control unit comprises a first relay REL1, a second relay REL2, a third relay REL3, a first switch and a second switch.
The negative pole of power supply unit with the negative pole of output unit is connected, the positive pole of power supply unit with the one end of third relay REL3 normally open contact is connected, the other end of third relay REL3 normally open contact with the positive pole of output unit is connected, the coil of third relay REL3 with software control end is connected, software control end still respectively with first switch with the second switch is connected, the positive pole of battery unit with the one end of first relay REL1 coil is connected, the other end of first relay REL1 coil passes through the second switch with the negative pole of output unit is connected, simultaneously with the negative pole of battery unit is connected, the one end of first relay REL1 normally open contact is connected with the positive pole of battery unit through first switch, the other end of first relay REL1 normally open contact with one end of second relay REL2 normally closed contact is connected, the other end of second relay REL2 normally closed contact with the positive pole of output unit is connected with the second relay REL 2.
The first switch is a brake mode switching switch and is used for switching brake modes (the brake modes comprise a normally open brake mode and a normally closed brake mode). When the first switch is closed, the control circuit is switched to a normally open brake mode, and simultaneously, a first signal is sent to the software control end, the first signal is used for informing the software control end that the first switch is in a closed state, the software control end can determine that the control circuit is switched to the normally open brake mode, and when the first switch is disconnected, the control circuit is switched to the normally closed brake mode.
When the system power supply is powered off, the coil of the second relay REL2 is powered off, the normally closed contact of the second relay REL2 is in a closed state, when the system power supply is powered on, the coil of the second relay REL2 is powered on, and the normally closed contact of the second relay REL2 is in an open state.
Under the condition that the first switch is closed and the system power supply is powered off, the control circuit is switched to a normally open braking mode, the normally closed contact of the second relay REL2 is in a closed state, and at the moment, a user can control the brake to be opened or closed by controlling the second switch (manual braking switch), specifically: when the second switch is controlled to be closed, a normally open contact of the first relay REL1 is closed, the battery unit supplies power to the output unit through the first switch, the first relay REL1 and the second relay REL2, and a brake is opened; when the second switch is opened, the normally open contact of the first relay REL1 is opened, and the brake is closed.
Under the condition that the first switch is closed and the system power supply is electrified, the control circuit is in a normally open braking mode, the normally closed contact of the second relay REL2 is in an open state, at the moment, the battery unit cannot supply power to the output unit to control braking, and a signal can be sent to the software control end through controlling the second switch so as to inform the software control end to control braking. Specifically, when the second switch is controlled to be closed, a second signal is sent to the software control end, after the software control end receives the second signal, the software control end can control the third relay REL3 coil to be electrified through the software control signal, so that the normally open contact of the third relay REL3 coil is closed, and power can be supplied to the output unit through the power supply unit.
Under the condition that the first switch is disconnected and the system power supply is powered off, the control circuit is switched to a normally closed braking mode, at the moment, the tower crane slewing boom is in a locking state, braking is generally released through an electric vane in actual application, and the battery unit does not participate in braking control by disconnecting the first switch.
Under the condition that the first switch is disconnected and the system power supply is electrified, a signal can be sent to the software control end through controlling the second switch to inform the software control end of controlling braking, specifically, when the second switch is controlled to be closed, a second signal is sent to the software control end, after the second signal is received by the software control end, the third relay REL3 coil can be controlled to be electrified through the software control signal, so that a normally open contact is closed, and then the power supply unit can supply power to the output unit.
Through this application, can utilize a control circuit to realize opening always and normally closed formula gyration brake, for the control circuit of design respectively to opening always braking and normally closed formula brake, reduced manufacturing cost and later maintenance's maintenance cost, in practical application, two kinds of brake modes are controlled through a control circuit, have reduced the use degree of difficulty, make things convenient for the user to operate.
According to one embodiment of the present application, the first switch comprises a first contact K2 and a second contact K5, the second switch comprises a third contact K3 and a fourth contact K4,
one end of the first contact K2 is connected with the anode of the battery unit, the other end of the first contact K2 is connected with the normally open contact of the first relay REL1, and the second contact K5 is connected with the software control end. The switching states of the first contact K2 and the second contact K5 are consistent, the first switch is closed, namely the first contact K2 and the second contact K5 are closed, the first switch is opened, namely the first contact K2 and the second contact K5 are opened, and a first signal is sent to the software control end when the second contact K5 is closed so as to inform the software control end that the first switch is switched to the closed state.
One end of the third contact K3 is connected with the coil of the first relay REL1, the other end of the third contact K3 is connected with the negative electrode of the output unit and is also connected with the negative electrode of the battery unit, and the fourth contact K4 is connected with the software control end. The switching states of the third contact K3 and the fourth contact K4 are consistent, the second switch is closed, namely the third contact K3 and the fourth contact K4 are closed, the second switch is opened, namely the third contact K3 and the fourth contact K4 are opened, and a second signal is sent to the software control end when the fourth contact K4 is closed so as to inform the software control end that the second switch is switched to the closed state.
According to one embodiment of the present application, the battery cell includes a battery E1, a first resistor R1, a first diode D2, and a third switch K1. One end of the third switch K1 is connected with the positive electrode of the power supply unit, the other end of the third switch K1 is connected with the anode of the first diode D2, the cathode of the first diode D2 is connected with the anode of the battery E1 through the first resistor R1, the anode of the battery E1 is connected with the coil of the first relay REL1, and the third switch K1 is also connected with the normally open contact of the first relay REL1 through the first switch; the cathode of the battery E1 is connected with the cathode of the power supply unit and also connected with the cathode of the output unit. When the third switch K1 is closed, the power supply unit charges the battery E1 through the third switch K1, the first diode D2 and the first resistor R1.
According to one embodiment of the application, the output unit comprises a brake coil L1, a second diode D3 and a second resistor R2, wherein the positive electrode of the brake coil L1 is connected with one end of a normally closed contact of the second relay REL2, is also connected with one end of a normally open contact of the third relay REL3, and the negative electrode of the brake coil L1 is connected with the negative electrode of the power supply unit and is also connected with one end of the second switch; the second diode D3 is connected in series with the second resistor R2 and then connected in parallel to two ends of the brake coil L1 for freewheeling of the brake coil L1, preferably, the second diode D3 may be a parallel dual diode, so as to be capable of bearing a larger current and playing a role in shunting.
According to one embodiment of the application, the power supply unit comprises an alternating current power source and a rectifier bridge D1, wherein the rectifier bridge D1 is used for converting alternating current provided by the alternating current power source into direct current. After being rectified by the rectifier bridge D1, the alternating current power supply has an anode connected with the battery unit and the third relay REL3 respectively, and a cathode connected with the cathode of the output unit.
The application also provides a brake control device, which comprises the brake control circuit.
The application also proposes a device comprising a brake control device according to the foregoing.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A brake control circuit for braking a rotary electric machine, the circuit comprising: the power supply unit, the battery unit, the control unit, the output unit and the software control end, wherein the control unit comprises a first relay, a second relay, a third relay, a first switch and a second switch;
the negative electrode of the power supply unit is connected with the negative electrode of the output unit, the positive electrode of the power supply unit is connected with one end of a normally open contact of the third relay, the other end of the normally open contact of the third relay is connected with the positive electrode of the output unit, the coil of the third relay is connected with the software control end, the software control end is also connected with the first switch and the second switch respectively, the anode of the battery unit is connected with one end of the coil of the first relay, the other end of the coil of the first relay is connected with the negative electrode of the output unit through the second switch, meanwhile, the other end of the coil of the first relay is connected with the negative electrode of the battery unit through the second switch, one end of the normally open contact of the first relay is connected with the positive electrode of the battery unit through the first switch, the other end of the normally open contact of the first relay is connected with one end of the normally closed contact of the second relay, the other end of the normally closed contact of the second relay is connected with the positive electrode of the output unit, and the system is connected with the positive electrode of the second relay;
when the first switch is closed, the control circuit is switched to a normally open braking mode, and when the first switch is opened, the control circuit is switched to a normally closed braking mode.
2. The circuit of claim 1, wherein the first switch comprises a first contact and a second contact, the second switch comprises a third contact and a fourth contact,
one end of the first contact is connected with the anode of the battery unit, the other end of the first contact is connected with the normally open contact of the first relay, and the second contact is connected with the software control end;
one end of the third contact is connected with the coil of the first relay, the other end of the third contact is connected with the negative electrode of the output unit and also connected with the negative electrode of the battery unit, and the fourth contact is connected with the software control end.
3. The circuit of claim 1, wherein the battery cell comprises a battery, a first resistor, a first diode, and a third switch,
one end of the third switch is connected with the positive electrode of the power supply unit, the other end of the third switch is connected with the anode of the first diode, the cathode of the first diode is connected with the anode of the battery through the first resistor, the anode of the battery is connected with the coil of the first relay, and the third switch is also connected with the normally open contact of the first relay through the first switch; the cathode of the battery is connected with the cathode of the power supply unit and also connected with the cathode of the output unit;
when the third switch is closed, the power supply unit charges the battery through the third switch, the first diode and the first resistor.
4. The circuit of claim 1, wherein the output unit comprises a brake coil, a second diode, and a second resistor,
the positive electrode of the brake coil is connected with one end of a normally-closed contact of the second relay, and is also connected with one end of a normally-open contact of the third relay, and the negative electrode of the brake coil is connected with the negative electrode of the power supply unit and is also connected with one end of the second switch; the second diode is connected in series with the second resistor and then connected in parallel with two ends of the brake coil for freewheeling of the brake coil.
5. The circuit of claim 1, wherein the power supply unit comprises an alternating current power source and a rectifier bridge,
the alternating current power supply is rectified by the rectifier bridge, the anode of the alternating current power supply is connected with the battery unit and the third relay respectively, and the cathode of the alternating current power supply is connected with the cathode of the output unit.
6. A brake control apparatus, characterized in that the apparatus comprises a brake control circuit as claimed in any one of claims 1 to 5.
7. A brake control apparatus, characterized in that the apparatus comprises the brake control device of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217400.4A CN113839585B (en) | 2021-10-19 | 2021-10-19 | Brake control circuit, device and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217400.4A CN113839585B (en) | 2021-10-19 | 2021-10-19 | Brake control circuit, device and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113839585A CN113839585A (en) | 2021-12-24 |
| CN113839585B true CN113839585B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111217400.4A Active CN113839585B (en) | 2021-10-19 | 2021-10-19 | Brake control circuit, device and equipment |
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| Country | Link |
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| CN (1) | CN113839585B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1331260A (en) * | 1970-05-15 | 1973-09-26 | J T Electrical Controls Ltd | Braking of rotary electrical machines |
| JPS5274816A (en) * | 1975-11-25 | 1977-06-23 | Gen Electric | Motor control circuit |
| CN2741948Y (en) * | 2004-05-24 | 2005-11-23 | 孔凡华 | Controller for AC crane speed regulation |
| CN201667626U (en) * | 2010-01-16 | 2010-12-08 | 刘勇 | Electrocar motor brake |
| CN103326635A (en) * | 2012-03-23 | 2013-09-25 | 海洋王照明科技股份有限公司 | Direct current motor braking circuit |
| CN203368377U (en) * | 2013-07-22 | 2013-12-25 | Asco电力技术公司 | Control circuit and switch apparatus |
| CN211744375U (en) * | 2020-01-21 | 2020-10-23 | 漳州市安麟机电研究所有限公司 | Fire prevention keeps off cigarette motor brake circuit |
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2021
- 2021-10-19 CN CN202111217400.4A patent/CN113839585B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1331260A (en) * | 1970-05-15 | 1973-09-26 | J T Electrical Controls Ltd | Braking of rotary electrical machines |
| JPS5274816A (en) * | 1975-11-25 | 1977-06-23 | Gen Electric | Motor control circuit |
| CN2741948Y (en) * | 2004-05-24 | 2005-11-23 | 孔凡华 | Controller for AC crane speed regulation |
| CN201667626U (en) * | 2010-01-16 | 2010-12-08 | 刘勇 | Electrocar motor brake |
| CN103326635A (en) * | 2012-03-23 | 2013-09-25 | 海洋王照明科技股份有限公司 | Direct current motor braking circuit |
| CN203368377U (en) * | 2013-07-22 | 2013-12-25 | Asco电力技术公司 | Control circuit and switch apparatus |
| CN211744375U (en) * | 2020-01-21 | 2020-10-23 | 漳州市安麟机电研究所有限公司 | Fire prevention keeps off cigarette motor brake circuit |
Non-Patent Citations (1)
| Title |
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| 桥门式起重机平移机构制动装置的研制与应用;许建平;机床电器(第06期);第28、49-50页 * |
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| CN113839585A (en) | 2021-12-24 |
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