CN117526773B - New energy stereo garage hoisting equipment motor brake control system and control method - Google Patents

New energy stereo garage hoisting equipment motor brake control system and control method Download PDF

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Publication number
CN117526773B
CN117526773B CN202410018149.6A CN202410018149A CN117526773B CN 117526773 B CN117526773 B CN 117526773B CN 202410018149 A CN202410018149 A CN 202410018149A CN 117526773 B CN117526773 B CN 117526773B
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China
Prior art keywords
feedback
normally
contactor
contact
open contact
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CN202410018149.6A
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Chinese (zh)
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CN117526773A (en
Inventor
李富荣
胡帅
蒋官业
王振宇
吴佳龙
黄发诚
尹龙康
黄立锋
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China Construction Science and Industry Smart Parking Technology Co Ltd
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China Construction Science and Industry Smart Parking Technology Co Ltd
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Priority to CN202410018149.6A priority Critical patent/CN117526773B/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H6/00—Buildings for parking cars, rolling-stock, aircraft, vessels or like vehicles, e.g. garages
    • E04H6/42—Devices or arrangements peculiar to garages, not covered elsewhere, e.g. securing devices, safety devices, monitoring and operating schemes; centering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/0006—Monitoring devices or performance analysers
    • B66B5/0018—Devices monitoring the operating condition of the elevator system
    • B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H6/00—Buildings for parking cars, rolling-stock, aircraft, vessels or like vehicles, e.g. garages
    • E04H6/08—Garages for many vehicles
    • E04H6/12—Garages for many vehicles with mechanical means for shifting or lifting vehicles
    • E04H6/18—Garages for many vehicles with mechanical means for shifting or lifting vehicles with means for transport in vertical direction only or independently in vertical and horizontal directions
    • 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
    • H02P3/02—Details
    • 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

Abstract

The invention discloses a new energy stereo garage hoisting equipment motor brake control system and a control method, wherein in the system, a main control unit can send a brake braking signal to a safety relay, can supply power to a brake motor through a first contactor and a second contactor so as to loosen the brake motor, and can also acquire a first feedback signal of the safety relay, a second feedback signal of the first contactor and a third feedback signal of the second contactor; the safety relay is used for switching on the first contactor and the second contactor to enable the brake motor to loosen when the power is on, and switching off the connection of the first contactor and/or the second contactor to enable the brake motor to brake when the power is off; and when the second feedback signal and the third feedback signal are both on feedback signals, the main control unit stops supplying power to the brake motor to brake, and determines whether the safety relay is welded according to the first feedback signal. The brake motor control device realizes the sensitive and timely taking of braking measures on the brake motor, and effectively improves the reliability and stability of the brake motor control.

Description

New energy stereo garage hoisting equipment motor brake control system and control method
Technical Field
The invention relates to the field of new energy motor control, in particular to a new energy stereo garage hoisting equipment motor brake control system and a control method.
Background
With the development of new energy technology, the parking and charging modes of new energy automobiles are also updated and iterated continuously. In order to save urban plane space and realize effective management of new energy automobiles, new energy stereo garages are gradually popularized. The new energy stereo garage is provided with a plurality of vehicle carrying plates arranged along the vertical space, each vehicle carrying plate can bear a plurality of new energy automobiles, and the new energy automobiles can be charged while being parked on the vehicle carrying plates. In the process of storing and taking the new energy stereo garage, lifting equipment in the new energy stereo garage lifts or descends a specific vehicle carrying plate through a lifting motor so as to convey the new energy vehicle which is newly parked into a specific position in the stereo garage or convey the new energy vehicle which needs to be taken out to the ground. In the transportation process of the new energy automobile, the lifting motor of the lifting equipment is braked by utilizing the motor brake to stop the action of the vehicle carrying plate. In the prior art, the motor brake is controlled by adopting a relay, and when braking is needed, the relay can cut off the power supply of a motor brake loop, so that the motor brake is braked, and the brake function is realized. However, the existing motor brake control system is easy to cause the failure of relay welding, at this time, the relay always keeps the motor brake loop in a connection state and cannot be disconnected, the motor brake cannot be braked, and then safety accidents such as falling of a vehicle carrying plate and the like are easily caused, and the reliability and stability of vehicle storage and taking of the stereo garage are difficult to guarantee.
Disclosure of Invention
The embodiment of the invention provides a new energy stereo garage lifting equipment motor brake control system and a control method, and aims to solve the problems that in the prior art, a control relay for lifting equipment motor brake of a new energy stereo garage is easy to weld, motor brake cannot be controlled in the process of storing and taking vehicles, so that safety accidents of falling of a vehicle carrying plate are easy to cause, and the reliability and stability of the stereo garage are low.
In a first aspect, the embodiment of the invention provides a new energy stereo garage hoisting equipment motor brake control system, which comprises a main control unit, a safety relay, a control power supply, a first contactor, a second contactor and a motor brake; the main control unit is connected to the enabling end of the safety relay; the positive electrode of the control power supply is connected to the first input end and the second input end of the safety relay, and the negative electrode of the control power supply is connected to the enabling output end of the first contactor and the enabling output end of the second contactor; an enabling input of the first contactor is connected to a first output of the safety relay; an enabling input end of the second contactor is connected to a second output end of the safety relay; the main control unit is connected to the input end of the first contactor, the output end of the first contactor is connected to the input end of the second contactor, and the output end of the second contactor is connected to the motor brake; the feedback input end of the safety relay is simultaneously connected to the first input end, the second input end and the positive electrode of the control power supply of the safety relay, and the feedback output end of the safety relay is connected to the first feedback end of the main control unit; the feedback input end of the first contactor and the feedback input end of the second contactor are both connected to the input end of the safety relay and the positive electrode of the control power supply at the same time; the feedback output end of the first contactor and the feedback output end of the second contactor are both connected to the second feedback end of the main control unit at the same time; the main control unit is used for sending a brake braking signal to the safety relay and supplying power to the motor brake through the first contactor and the second contactor so as to release the motor brake; the main control unit is also used for acquiring a first feedback signal of the safety relay, a second feedback signal of the first contactor and a third feedback signal of the second contactor; the safety relay is used for switching on the first contactor and the second contactor when the power is on so that the main control unit supplies power to the motor brake and enables the motor brake to be released, and is used for switching off the connection between the input end and the output end of the first contactor and/or the connection between the input end and the output end of the second contactor when the power is off so that the motor brake is braked; the main control unit is also used for stopping supplying power to the motor brake to brake the motor when the second feedback signal and the third feedback signal are both on feedback signals, and determining that the safety relay is in a welding state or an unwelded state according to the first feedback signal of the safety relay.
In some embodiments, the safety relay includes a first coil, a first normally closed contact, a second normally closed contact, a first normally open contact, and a second normally open contact; the first contactor comprises a second coil and a third normally open contact; the second contactor comprises a third coil and a fourth normally open contact; when the first coil is electrified, the first normally-open contact is closed and the first normally-closed contact is opened, the second normally-open contact is closed and the second normally-closed contact is opened, and the motor brake is released; when the first coil is powered off, the first normally-open contact is opened, the first normally-closed contact is closed, the second normally-open contact is opened, the second normally-closed contact is closed, and the motor is braked; the second coil closes the third normally open contact when energized; the third coil closes the fourth normally open contact when energized; one end of the second coil is an enabling output end of the first contactor, and the other end of the second coil is an enabling input end of the first contactor; one end of the third coil is an enabling output end of the second contactor, and the other end of the third coil is an enabling input end of the second contactor; the two ends of the first coil are the enabling ends of the safety relay and are connected to the main control unit; the first end of the first normally-closed contact is connected to the first end of the second normally-closed contact, and the second end of the first normally-closed contact is connected to the main control unit; the second end of the second normally-closed contact is connected to the positive electrode of the control power supply, the first end of the first normally-open contact and the first end of the second normally-open contact; the second end of the first normally-closed contact is a feedback output end of the safety relay, and the second end of the second normally-closed contact is a feedback input end of the safety relay; the positive electrode of the control power supply is connected to the first end of the first normally-open contact and the first end of the second normally-open contact, and the negative electrode of the control power supply is connected to one end of the second coil and one end of the third coil; a second end of the first normally open contact is connected to the other end of the second coil; a second end of the second normally open contact is connected to the other end of the third coil; one end of the third normally open contact is connected to the main control unit, and the other end of the third normally open contact is connected to one end of the fourth normally open contact; the other end of the fourth normally open contact is connected to the motor brake; the first end of the first normally open contact is a first input end of the safety relay, and the second end of the first normally open contact is a first output end of the safety relay; the first end of the second normally open contact is a second input end of the safety relay, and the second end is a second output end of the safety relay; one end of the third normally open contact is an input end of the first contactor, and the other end of the third normally open contact is an output end of the first contactor; one end of the fourth normally open contact is an input end of the second contactor, and the other end of the fourth normally open contact is an output end of the second contactor; the main control unit is used for supplying power to the motor brake and the first coil; the control power supply is used for supplying power to the second coil and the third coil.
In some embodiments, the first contactor further comprises a first feedback contact; the second contactor further comprises a second feedback contact; the second coil simultaneously closes the third normally open contact and the first feedback contact when energized; the third coil simultaneously closes the fourth normally open contact and the second feedback contact when energized; the first end of the first feedback contact is connected to the main control unit, and the second end of the first feedback contact is connected to the positive electrode of the control power supply, the first end of the first normally open contact and the first end of the second normally open contact; the first end of the second feedback contact is connected to the main control unit, and the second end of the second feedback contact is connected to the positive electrode of the control power supply, the first end of the first normally open contact and the first end of the second normally open contact; the first end of the first feedback contact is a feedback output end of the first contactor, and the second end of the first feedback contact is a feedback input end of the first contactor; the first end of the second feedback contact is the feedback output end of the second contactor, and the second end of the second feedback contact is the feedback input end of the second contactor.
In some embodiments, the master control unit includes a frequency converter, a PLC controller, and a brake power supply; the frequency converter is connected to the enabling end of the safety relay; the PLC is connected to the brake power supply; the first feedback end of the PLC is connected to the feedback output end of the safety relay, and the second feedback end of the PLC is connected to the feedback output end of the first contactor and the feedback output end of the second contactor; the brake power supply is connected to the input end of the first contactor; the frequency converter is used for sending a brake braking signal to the safety relay, and the brake power supply is used for supplying power to the motor brake through the first contactor and the second contactor so as to release the motor brake; the PLC is used for acquiring a first feedback signal of the safety relay, a second feedback signal of the first contactor and a third feedback signal of the second contactor; the PLC is further used for stopping supplying power to the braking power supply to enable the motor to brake when the second feedback signal and the third feedback signal are both on feedback signals, and determining that the safety relay is in a welding state or an unwelded state according to the first feedback signal of the safety relay.
In a second aspect, an embodiment of the present invention further provides a method for controlling a brake of a motor of a lifting device for a new energy stereo garage, which is applied to a master control unit in a brake control system of a motor of a lifting device for a new energy stereo garage according to the first aspect, where the method includes: responding to a braking instruction, sending a braking signal to an enabling end of the safety relay, and acquiring a first feedback signal output by a feedback output end of the safety relay through a first feedback end; if the first feedback signal is determined to be a brake release early warning signal, determining that the safety relay is in a welding state, and respectively acquiring a second feedback signal of a feedback output end of the first contactor and a third feedback signal of a feedback output end of the second contactor through a second feedback end; when one of the second feedback signal and the third feedback signal is an off feedback signal and one of the second feedback signal and the third feedback signal is an on feedback signal, determining that the motor brake is braked, and generating first early warning information; and stopping power supply to the motor brake when the second feedback signal and the third feedback signal are both on feedback signals.
Based on the control system and the control system thereof provided by the embodiment of the invention, the control method for the motor brake of the new energy stereo garage lifting equipment provided by the embodiment of the invention obtains the first feedback signal, the second feedback signal and the third feedback signal of the safety relay, the first contactor and the second contactor through the main control unit, can sensitively sense when the safety relay is welded, and can switch on the feedback signals when the second feedback signal and the third feedback signal are both switching on feedback signals, namely, when the first contactor and the second contactor are influenced by the welding of the safety relay and are not switched off, the power supply of the motor brake is timely switched off so as to brake the motor brake; on the other hand, if one of the first contactor and the second contactor is disconnected when the safety relay is in fusion connection, the main control unit can flexibly determine that the power supply loop of the motor brake is disconnected at the moment, and then corresponding first early warning information is generated so as to indicate the fusion connection state under the condition of ensuring safety. Furthermore, the main control unit can sensitively and timely acquire the welding state of the safety relay and take braking measures for motor braking, and can simultaneously acquire the position with faults under the condition of ensuring safety, so that the reliability and stability of the motor braking control of the stereo garage are effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a first schematic diagram (motor braking state) of a motor braking control system of a new energy stereo garage lifting device according to an embodiment of the present invention;
Fig. 2 is a second schematic diagram (motor brake release state) of a motor brake control system of a new energy stereo garage lifting device according to an embodiment of the present invention;
fig. 3 is a third schematic diagram of a motor brake control system (a state that a safety relay is welded and a brake signal is issued) of a new energy stereo garage lifting device according to an embodiment of the present invention;
Fig. 4 is a schematic flow chart of a method for controlling braking of a motor of a lifting device of a new energy stereo garage according to an embodiment of the present invention;
fig. 5 is a schematic sub-flowchart of a new energy stereo garage lifting equipment motor brake control method according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
The embodiment of the invention provides a control system for a motor brake M1 of lifting equipment of a new energy stereo garage, which comprises a main control unit U1, a safety relay KA1, a control power supply DC1, a first contactor KM1, a second contactor KM2 and the motor brake M1; the main control unit U1 is connected to the enabling end of the safety relay KA 1; the positive electrode of the control power supply DC1 is connected to the first input end and the second input end of the safety relay KA1, and the negative electrode of the control power supply DC1 is connected to the enabling output end of the first contactor KM1 and the enabling output end of the second contactor KM 2; an enabling input end of the first contactor KM1 is connected to a first output end of the safety relay KA 1; an enabling input end of the second contactor KM2 is connected to a second output end of the safety relay KA 1; the main control unit U1 is connected to the input end of the first contactor KM1, the output end of the first contactor KM1 is connected to the input end of the second contactor KM2, and the output end of the second contactor KM2 is connected to the motor brake M1; the feedback input end of the safety relay KA1 is simultaneously connected to the first input end, the second input end and the positive electrode of the control power supply DC1 of the safety relay KA1, and the feedback output end of the safety relay KA1 is connected to the first feedback end of the main control unit U1; the feedback input end of the first contactor KM1 and the feedback input end of the second contactor KM2 are both connected to the input end of the safety relay KA1 and the positive electrode of the control power supply DC 1; the feedback output end of the first contactor KM1 and the feedback output end of the second contactor KM2 are both connected to the second feedback end of the main control unit U1 at the same time; the main control unit U1 is used for sending a brake braking signal to the safety relay KA1 and supplying power to the motor brake M1 through the first contactor KM1 and the second contactor KM2 so as to release the motor brake M1; the main control unit U1 is further configured to obtain a first feedback signal of the safety relay KA1, a second feedback signal of the first contactor KM1, and a third feedback signal of the second contactor KM 2; the safety relay KA1 is configured to switch on the first contactor KM1 and the second contactor KM2 when energized to enable the main control unit U1 to supply power to the motor brake M1 and enable the motor brake M1 to be released, and is configured to switch off a connection between an input end and an output end of the first contactor KM1 and/or a connection between an input end and an output end of the second contactor KM2 when de-energized to enable the motor brake M1 to be braked; the main control unit U1 is further configured to stop supplying power to the motor brake M1 to brake the motor brake M1 when the second feedback signal and the third feedback signal are both on feedback signals, and determine that the safety relay KA1 is in a welded state or an unwelded state according to the first feedback signal of the safety relay KA 1.
In this embodiment, the new energy stereo garage lifting device motor brake M1 control system is installed in a new energy stereo garage with a lifting motor and a plurality of vehicle carrying plates. The lifting motor can drive a specific number of car carrying plates to carry out lifting or descending motion in the vertical direction, and a motor brake M1 in a new energy stereo garage lifting equipment motor brake M1 control system can be released when the power is on, so that the car carrying plates can freely carry out lifting or descending motion in the vertical direction, and braking is carried out when the power is off, and the car carrying plates are prevented from continuing to move. The main control unit U1 is a comprehensive processing operation unit capable of receiving and analyzing circuit signals, and also has a power supply function of supplying power to the motor brake M1 and a signal transmitting function of transmitting control signals such as a brake braking signal, a brake release signal and the like to the safety relay KA 1.
As shown in fig. 1-3, the safety relay has a first input terminal 13, a second input terminal 14, a first output terminal 23, a second output terminal 24, a feedback input terminal 12, and a feedback output terminal 11; the first contactor has an input 41, an output 31, a feedback output 32, a feedback input 42, an enable input 33, and an enable output 43; the second contactor has an input of 51, an output of 61, a feedback output of 52, a feedback input of 62, an enable input of 53, and an enable output of 63; the first feedback end of the main control unit is 71, and the second feedback end is 72.
The safety relay KA1 comprises an enabling end, a first input end, a second input end, a feedback input end and a feedback output end, wherein the first input end and the second input end receive power supplied by the control power supply DC1, and can transmit electric energy to the enabling input end of the first contactor KM1 and the enabling input end of the second contactor KM2 when the first input end is communicated with the first output end and the second input end is communicated with the second output end, so that the connection between the input end and the output end of the first contactor KM1 is further connected, and the connection between the input end and the output end of the second contactor KM2 is further connected, so that the main control unit U1 can supply power to the motor brake M1 through the input end and the output end of the first contactor KM1 and the input end and the output end of the second contactor KM2, and the motor brake M1 can be released, and the vehicle carrying plate can move; the enabling end of the safety relay KA1 can receive a brake signal sent by the main control unit U1, then cuts off the connection between the first input end and the first output end, and simultaneously cuts off the connection between the second input end and the second output end so as to cut off the electric energy output of the first output end and the second output end; or the enabling end of the safety relay KA1 can also receive the brake release signal sent by the main control unit U1, restore the connection between the first input end and the first output end, and restore the connection between the second input end and the second output end at the same time, so as to restore the electric energy output of the first output end and the second output end.
Two independent electric energy transmission lines can be formed after the first input end and the first output end of the safety relay KA1 and the second output end are communicated. However, fusion may occur between the first input end and the first output end or between the second output end and the second output end, and further, when the enabling end of the safety relay KA1 receives the brake braking signal, if fusion occurs between the first input end and the first output end, the first input end cannot be disconnected from the first output end; similarly, if welding occurs between the second input end and the second output end, the second input end cannot be disconnected from the second output end. When the safety relay KA1 is in a welding state, there may be a case that the connection between the input end and the output end in the first contactor KM1 is continuously maintained when the enabling end of the safety relay KA1 receives the brake signal, and meanwhile, the connection between the input end and the output end in the second contactor KM2 is continuously maintained, so that the power supply of the motor brake M1 cannot be cut off, and the brake cannot be performed. When the safety relay KA1 is in an unwelded state, when the enabling end of the safety relay KA1 receives a brake braking signal, the connection between the input end and the output end in the first contactor KM1 must be disconnected along with the disconnection of the connection between the first input end and the first output end of the safety relay KA1, and meanwhile, the connection between the input end and the output end in the second contactor KM2 must also be disconnected along with the disconnection of the connection between the second input end and the second output end of the safety relay KA1, so that the power supply of the motor brake M1 can be ensured to be disconnected.
The feedback input and the feedback output of the safety relay KA1 are in fact in series relationship and the shut-off of the loop between the feedback input and the feedback output and the communication between the first input and the first output and/or the communication between the second output and the second output are synchronized, i.e. the loop between the feedback input and the feedback output is shut-off when the connection of at least one of the first input and the first output and the second output is communicated; the communication of the loop between the feedback input and the feedback output and the switching off of the loop between the first input and the first output and the switching off of the loop between the second output and the second output are synchronized, i.e. the loop between the feedback input and the feedback output is only communicated when the connections between the first input and the first output and the second output are all communicated.
When the enabling end of the safety relay KA1 receives a brake braking signal of the main control unit U1, a loop formed between the feedback output end and the feedback input end is changed from an open state to a closed state, at the moment, a first feedback signal output by the feedback output end to the main control unit U1 is fed back, namely, a communication state is formed between the current feedback output end and the feedback input end, at the moment, the connection between the first input end and the first output end and the connection between the second input end and the second output end are cut off, and the safety relay KA1 is not in a welding state; conversely, when the enabling end of the safety relay KA1 receives the brake braking signal of the main control unit U1, if the feedback output end and the feedback input end are still in the disconnected state, the feedback output end outputs the first feedback signal to the main control unit U1, that is, the feedback is that the current feedback output end and the feedback input end are in the disconnected state, it can be determined that the connection between the first input end and the first output end and/or the connection between the second input end and the second output end is not yet disconnected, and the safety relay KA1 is in the welded state. Therefore, the main control unit U1 may determine whether the safety relay KA1 is welded by acquiring the first feedback signal output by the feedback output end of the safety relay KA1, so as to take further braking measures.
The first contactor KM1 is also provided with a feedback input end and a feedback output end, and the second contactor KM2 is correspondingly provided with a feedback input end and a feedback output end. When the enabling input end of the first contactor KM1 receives electric energy input of the first output end of the safety relay KA1, the feedback input end and the feedback output end in the first contactor KM1 are communicated, and the input end and the output end in the first contactor KM1 are synchronously communicated; when the enabling input end of the first contactor KM1 receives the electric energy input of the first output end of the safety relay KA1 and is cut off, the feedback input end and the feedback output end of the first contactor KM1 are cut off, and the input end and the output end of the first contactor KM1 are also cut off synchronously. Similarly, when the enabling input end of the second contactor KM2 receives the electric energy input of the second output end of the safety relay KA1, the feedback input end and the feedback output end of the second contactor KM2 are communicated, and the input end and the output end of the second contactor KM2 are also synchronously communicated; when the enabling input end of the second contactor KM2 receives the electric energy input of the second output end of the safety relay KA1 and is cut off, the feedback input end and the feedback output end of the second contactor KM2 are cut off, and the input end and the output end of the second contactor KM2 are also cut off synchronously. Furthermore, when the safety relay KA1 is in the unwelded state, after receiving the braking signal of the main control unit U1, the safety relay KA1 must disconnect the feedback input end and the feedback output end of the first contactor KM1, and at the same time, the feedback input end and the feedback output end of the second contactor KM2 must also disconnect the connection, at this time, the second feedback signal sent by the first contactor KM1 to the second feedback end of the main control unit U1 and the third feedback signal sent by the second contactor KM2 to the second feedback end of the main control unit U1 are both disconnection feedback signals, and at this time, it can be determined that the power supply of the motor brake M1 has been disconnected. When the safety relay KA1 is in a welding state, after receiving a brake braking signal of the main control unit U1, one or both of a connection between a feedback input end and a feedback output end in the first contactor KM1 or a connection between a feedback input end and a feedback output end in the second contactor KM2 can be kept communicated, and at the moment, one or both of a second feedback signal sent by the first contactor KM1 to a second feedback end of the main control unit U1 and a third feedback signal sent by the second contactor KM2 to a second feedback end of the main control unit U1 are communicated feedback signals; at this time, if one of the second feedback signal and the third feedback signal is an on feedback signal and the other is an off feedback signal, it can be determined that the power supply loop of the motor brake M1 has been turned off at this time; if the second feedback signal and the third feedback signal are both on feedback signals, it can be determined that the power supply loop of the motor brake M1 still remains connected, the motor brake M1 cannot brake, and the main control unit U1 needs to directly cut off the power supply to the motor brake M1 to ensure the motor brake M1 to brake.
Therefore, the main control unit U1 can sensitively determine whether the safety relay KA1 is welded, and flexibly determine whether the power supply loop of the motor brake M1 is cut off when the safety relay KA1 is welded, so as to take further braking measures, such as directly cutting off the power supply to the motor brake M1.
In an embodiment, the safety relay KA1 includes a first coil K1, a first normally closed contact NC1, a second normally closed contact NC2, a first normally open contact NO1, and a first normally open contact NO2; the first contactor KM1 comprises a second coil K2 and a third normally open contact NO3; the second contactor KM2 includes a third coil K3 and a fourth normally open contact NO4; when the first coil K1 is electrified, the first normally-open contact NO1 is closed, the first normally-closed contact NC1 is opened, the first normally-open contact NO2 is closed, the second normally-closed contact NC2 is opened, and the motor brake M1 is released; when the first coil K1 is powered off, the first normally-open contact NO1 is opened, the first normally-closed contact NC1 is closed, the first normally-open contact NO2 is opened, the second normally-closed contact NC2 is closed, and the motor brake M1 is braked; the second coil K2 closes the third normally open contact NO3 when being electrified; the third coil K3 closes the fourth normally open contact NO4 when being electrified; one end of the second coil K2 is an enabling output end of the first contactor KM1, and the other end is an enabling input end of the first contactor KM 1; one end of the third coil K3 is an enabling output end of the second contactor KM2, and the other end is an enabling input end of the second contactor KM 2; two ends of the first coil K1 are enabling ends of the safety relay KA1 and are connected to the main control unit U1; a first end of the first normally-closed contact NC1 is connected to a first end of the second normally-closed contact NC2, and a second end of the first normally-closed contact NC1 is connected to the main control unit U1; the second end of the second normally-closed contact NC2 is connected to the positive electrode of the control power supply DC1, the first end of the first normally-open contact NO1 and the first end of the first normally-open contact NO2; the second end of the first normally closed contact NC1 is a feedback output end of the safety relay KA1, and the second end of the second normally closed contact NC2 is a feedback input end of the safety relay KA 1; the positive electrode of the control power supply DC1 is connected to the first end of the first normally-open contact NO1 and the first end of the first normally-open contact NO2, and the negative electrode of the control power supply DC1 is connected to one end of the second coil K2 and one end of the third coil K3; a second end of the first normally open contact NO1 is connected to the other end of the second coil K2; a second end of the first normally open contact NO2 is connected to the other end of the third coil K3; one end of the third normally open contact NO3 is connected to the main control unit U1, and the other end of the third normally open contact NO3 is connected to one end of the fourth normally open contact NO4; the other end of the fourth normally open contact NO4 is connected to the motor brake M1; the first end of the first normally open contact NO1 is a first input end of the safety relay KA1, and the second end is a first output end of the safety relay KA 1; the first end of the first normally open contact NO2 is a second input end of the safety relay KA1, and the second end is a second output end of the safety relay KA 1; one end of the third normally open contact NO3 is an input end of the first contactor KM1, and the other end of the third normally open contact NO3 is an output end of the first contactor KM 1; one end of the fourth normally open contact NO4 is an input end of the second contactor KM2, and the other end of the fourth normally open contact NO4 is an output end of the second contactor KM 2; the main control unit U1 is used for supplying power to the motor brake M1 and the first coil K1; the control power supply DC1 is configured to supply power to the second coil K2 and the third coil K3.
In this embodiment, when the first coil K1 receives the brake release signal of the master control unit U1, in order to achieve the connection of the power supply loop of the motor brake M1, the first coil K1 generates exciting current and changes its magnetic field, so as to drive the first normally closed contact NC1, the second normally closed contact NC2, the first normally open contact NO1 and the first normally open contact NO2 inside the safety relay KA1 to move simultaneously. Before the first coil K1 receives the brake release signal of the main control unit U1, the first and second normally closed contacts NC1 and NC2 are kept closed, and the first and normally open contacts NO1 and NO2 are kept open. As shown in fig. 2, after the exciting current is generated in the first coil K1, the first normally-closed contact NC1 is opened, the first normally-open contact NO1 is closed, and simultaneously the second normally-closed contact NC2 is opened, and the second normally-closed contact NC2 is closed. That is, in reality, the open/close states of the first normally-closed contact NC1 and the first normally-open contact NO1 are always kept opposite, and the open/close states of the two normally-closed contacts and the first normally-open contact NO2 are also always kept opposite. On the structural level, the first end of the first normally-closed contact NC1 and the first end of the second normally-closed contact NC2 may be disposed at a position in the safety relay KA1 close to one side, and the first end of the first normally-closed contact NC1 and the first end of the second normally-closed contact NC2 may be disposed at a position in the safety relay KA1 close to the other side, so that when the first normally-closed contact NC1 and the second normally-closed contact NC2 are opened and moved to the other side, the first normally-open contact NO1 and the first normally-open contact NO2 are also moved to the other direction and are turned on. Meanwhile, on the structural level, the first normally-closed contact NC1 and the first normally-open contact NO1 are kept to synchronously move to the same side of the safety relay KA1, and the second normally-closed contact NC2 and the first normally-open contact NO2 are also kept to synchronously move to the same side of the safety relay KA 1.
When the first normally open contact NO1 and the first normally open contact NO2 are turned on, the second coil K2 and the third coil K3 also receive the power supply of the control power supply DC1 to simultaneously generate exciting current. In the first contactor KM1, the exciting current generated by the second coil K2 causes the third normally open contact NO3 to be closed; in the second contactor KM2, the fourth normally open contact NO4 is closed by the exciting current generated by the third coil K3. Furthermore, after the third normally open contact NO3 and the fourth normally open contact NO4 are closed, the connection between the main control unit U1 and the motor brake M1 can be realized, so that the motor brake M1 can receive power supply of the main control unit U1.
The welding state of the safety relay KA1 means that the first normally open contact NO1 and/or the first normally open contact NO2 are welded and cannot be disconnected. As shown in fig. 1, when the first coil K1 receives a braking signal of the main control unit U1, the exciting current of the first coil K1 is turned off, and then, when neither the first normally open contact NO1 nor the first normally open contact NO2 is welded, the first normally open contact NO1 and the first normally open contact NO2 are disconnected, and then, the exciting current in the second coil K2 and the third coil K3 is also lost, and the third normally open contact NO3 and the fourth normally open contact NO4 are also disconnected, and further, the power supply loop of the motor brake M1 is cut off, and the motor brake M1 can realize braking. However, when the first normally open contact NO1 is welded, as shown in fig. 3, the first normally open contact NO1 will be always closed, the first normally closed contact NC1 will be always opened, the third normally open contact NO3 will be always closed, at this time, if the first normally open contact NO2 is not welded, the first normally open contact NO2 will be normally opened, the second normally closed contact NC2 will become closed, the fourth normally open contact NO4 will become open, at this time, the power supply circuit of the motor brake M1 can still be opened, and the motor brake M1 can still brake; correspondingly, when the first normally open contact NO2 is welded, the first normally open contact NO2 is always closed, the second normally closed contact NC2 is always opened, the fourth normally open contact NO4 is always closed, if the first normally open contact NO1 is not welded, the first normally open contact NO1 can be normally opened, the first normally closed contact NC1 can be closed, the third normally open contact NO3 can be opened, the power supply loop of the motor brake M1 can be opened, and the motor brake M1 can still brake. Therefore, as two groups of independent normally open contacts and normally closed contacts (the first normally closed contact NC1, the first normally open contact NO1, the second normally closed contact NC2 and the first normally open contact NO 2) are adopted in the safety relay KA1, even if one of the first normally open contact NO1 and the first normally open contact NO2 is welded, the other one of the first normally open contact NO1 and the first normally open contact NO2 can be normally disconnected and drives the corresponding third normally open contact NO3 or fourth normally open contact NO4 to be disconnected. Compared with the prior relay which only adopts a group of normally open contacts and normally closed contacts and has no simultaneous movement relationship between the normally open contacts and the normally closed contacts, the safety relay KA1 provided by the embodiment of the invention adopts a redundant design, and can still disconnect the other contactor of the two contactors when the normally open contacts in the group of normally open contacts and the normally closed contacts are welded, so that a power supply loop of the motor brake M1 can be disconnected in time to realize braking when welding occurs.
In an embodiment, the first contactor KM1 further comprises a first feedback contact NO5; the second contactor KM2 further comprises a second feedback contact NO6; the second coil K2 simultaneously closes the third normally open contact NO3 and the first feedback contact NO5 when being electrified; the third coil K3 simultaneously closes the fourth normally open contact NO4 and the second feedback contact NO6 when being electrified; a first end of the first feedback contact NO5 is connected to the main control unit U1, and a second end of the first feedback contact NO5 is connected to the positive electrode of the control power supply DC1, the first end of the first normally open contact NO1, and the first end of the first normally open contact NO 2; the first end of the second feedback contact NO6 is connected to the main control unit U1, and the second end of the second feedback contact NO6 is connected to the positive electrode of the control power supply DC1, the first end of the first normally open contact NO1 and the first end of the first normally open contact NO 2; the first end of the first feedback contact NO5 is a feedback output end of the first contactor KM1, and the second end of the first feedback contact NO5 is a feedback input end of the first contactor KM 1; the first end of the second feedback contact NO6 is a feedback output end of the second contactor KM2, and the second end of the second feedback contact NO6 is a feedback input end of the second contactor KM 2.
In this embodiment, the first feedback contact NO5 and the third normally open contact NO3 are controlled to be opened or closed synchronously by the third coil K3, and the second feedback contact NO6 and the fourth normally open contact NO4 are controlled to be opened or closed synchronously by the third coil K3. When only the first normally open contact NO1 is welded and the main control unit U1 sends a brake braking signal to the safety relay KA1, the third normally open contact NO3 and the first feedback contact NO5 are always closed, at the moment, the second feedback signal sent by the first feedback contact NO5 to the main control unit U1 is a switching-on feedback signal, namely, the first contactor KM1 is still in a switching-on state, and the second feedback contact NO6 can be switched off, at the moment, the third feedback signal sent by the second feedback contact NO6 to the main control unit U1 is a switching-on feedback signal, namely, the second contactor KM2 is in a switching-off state. Correspondingly, when only the first normally open contact NO2 is welded and the main control unit U1 sends a braking signal to the safety relay KA1, the fourth normally open contact NO4 and the second feedback contact NO6 are always closed, at this time, the third feedback signal sent by the second feedback contact NO6 to the main control unit U1 is an on feedback signal, that is, the second contactor KM2 is still in an on state at this time is indicated, and the first feedback contact NO5 can be turned off, at this time, the second feedback signal sent by the first feedback contact NO5 to the main control unit U1 is an on feedback signal, that is, the first contactor KM1 is already in an off state at this time is indicated. If only one of the first contactor KM1 and the second contactor KM2 remains on, the main control unit U1 can also confirm that the motor brake M1 is now braked.
And if the first normally open contact NO1 and/or the first normally open contact NO2 are/is welded, and the main control unit U1 sends a braking signal to the safety relay KA1, the third normally open contact NO3 and the fourth normally open contact NO4 are kept closed, and correspondingly, the first feedback contact NO5 and the second feedback contact NO6 are kept closed, and at the moment, the second feedback signal and the third feedback signal received by the main control unit U1 are both on feedback signals, and at the moment, the main control unit U1 determines that the power supply loop of the motor brake M1 is not cut off, and then the main control unit U1 directly stops the power supply to the motor brake M1 so as to realize the braking of the motor brake M1. Therefore, after the first feedback contact NO5 and the second feedback contact NO6 are arranged, the main control unit U1 can confirm that the motor brake M1 is braked when only one contactor is not disconnected, so that the power supply is not directly stopped, the operation steps of repeatedly starting and stopping the power supply are omitted, the power supply is stopped only when the first contactor KM1 and the second contactor KM2 are not disconnected, the position of the failed contactor can be judged while the safety is ensured, and the reliability and the stability of the control of the motor brake M1 are further effectively improved.
In an embodiment, the main control unit U1 includes a frequency converter VF1, a PLC controller PLC1, and a brake power supply DC2; the frequency converter VF1 is connected to the enabling end of the safety relay KA 1; the PLC controller PLC1 is connected to the brake power supply DC2; the first feedback end of the PLC controller PLC1 is connected to the feedback output end of the safety relay KA1, and the second feedback end of the PLC controller PLC1 is connected to the feedback output end of the first contactor KM1 and the feedback output end of the second contactor KM 2; the brake power supply DC2 is connected to the input end of the first contactor KM 1; the second feedback end of the PLC controller PLC1 is the second feedback end of the main control unit U1, and the first feedback end of the PLC controller PLC1 is the first feedback end of the main control unit U1; the frequency converter VF1 is configured to send a braking signal to the safety relay KA1, and the braking power supply DC2 is configured to supply power to the motor brake M1 through the first contactor KM1 and the second contactor KM2 so as to release the motor brake M1; the PLC controller PLC1 is configured to obtain a first feedback signal of the safety relay KA1, a second feedback signal of the first contactor KM1, and a third feedback signal of the second contactor KM 2; the PLC1 is further configured to stop supplying power to the brake power supply DC2 to brake the motor brake M1 when the second feedback signal and the third feedback signal are both on feedback signals, and determine that the safety relay KA1 is in a welding state or an unwelded state according to the first feedback signal of the safety relay KA 1.
In this embodiment, the PLC controller PLC1 can control the frequency converter VF1 and the brake power DC2, and specifically, the PLC controller PLC1 can send a brake braking signal or a brake release signal to the first coil K1 through the frequency converter VF1, so as to control the exciting current in the first coil K1. The PLC controller PLC1 can also directly turn on or off the brake power supply DC2 so as to realize the on or off of the power supply of the motor brake M1. The first feedback contact NO5 and the second feedback contact NO6 in the PLC controller PLC1 are the first feedback contact NO5 and the second feedback contact NO6 of the main control unit U1, namely, the first feedback signal, the second feedback signal and the third feedback signal are all received and analyzed by the PLC controller PLC1, the PLC controller PLC1 can know whether the safety relay KA1 is in a welding state according to the first feedback signal, and can know whether the first contactor KM1 and the second contactor KM2 are in a connection state according to the second feedback signal and the third feedback signal. Through the control of PLC controller PLC1 to safety relay KA1 and to brake power DC2, can effectively promote new forms of energy stereo garage hoisting equipment motor brake M1 control system operation's overall stability and intelligent degree.
The embodiment of the invention also provides a new energy stereo garage lifting equipment motor brake control method which is applied to the main control unit U1 in the new energy stereo garage lifting equipment motor brake control system, as shown in fig. 4, and comprises the following steps of S110-S150:
S110, responding to a braking instruction, sending a braking signal to an enabling end of the safety relay, and acquiring a first feedback signal output by a feedback output end of the safety relay through a first feedback end.
The main control unit U1 can receive braking instructions (such as braking instructions generated when a sudden stop button is pressed) from other devices in the new energy stereo garage or from operators, so as to send braking signals to the enabling end of the safety relay KA1 when braking is needed. The first feedback end of the safety relay KA1 is actually used for acquiring the first feedback signal output by the feedback output end of the safety relay KA1 in real time. After the master control unit U1 issues the braking signal, if the obtained first feedback signal is in a disconnected state between the feedback output end and the feedback input end of the safety relay KA1, it may be determined that the safety relay KA1 is in a welded state. However, if the main control unit U1 has not issued a braking signal, the feedback output end and the feedback input end are also in an off state when the motor brake M1 is operating normally, and at this time, the first feedback signal acquired by the main control unit U1 is also in an off state between the feedback output end and the feedback input end of the safety relay KA1, and since the braking stage is not entered at this time, the main control unit U1 does not determine that the safety relay KA1 is in a welding state.
In an embodiment, the safety relay KA1 includes a first coil K1, a first normally closed contact NC1, a second normally closed contact NC2, a first normally open contact NO1, and a first normally open contact NO2; the first contactor KM1 comprises a second coil K2 and a third normally open contact NO3; the second contactor KM2 includes a third coil K3 and a fourth normally open contact NO4; when the first coil K1 is electrified, the first normally-open contact NO1 is closed, the first normally-closed contact NC1 is opened, the first normally-open contact NO2 is closed, the second normally-closed contact NC2 is opened, and the motor brake M1 is released; when the first coil K1 is powered off, the first normally-open contact NO1 is opened, the first normally-closed contact NC1 is closed, the first normally-open contact NO2 is opened, the second normally-closed contact NC2 is closed, and the motor brake M1 is braked; the second coil K2 closes the third normally open contact NO3 when being electrified; the third coil K3 closes the fourth normally open contact NO4 when being electrified; one end of the second coil K2 is an enabling output end of the first contactor KM1, and the other end is an enabling input end of the first contactor KM 1; one end of the third coil K3 is an enabling output end of the second contactor KM2, and the other end is an enabling input end of the second contactor KM 2; two ends of the first coil K1 are enabling ends of the safety relay KA1 and are connected to the main control unit U1; a first end of the first normally-closed contact NC1 is connected to a first end of the second normally-closed contact NC2, and a second end of the first normally-closed contact NC1 is connected to the main control unit U1; the second end of the second normally-closed contact NC2 is connected to the positive electrode of the control power supply DC1, the first end of the first normally-open contact NO1 and the first end of the first normally-open contact NO2; the second end of the first normally closed contact NC1 is a feedback output end of the safety relay KA1, and the second end of the second normally closed contact NC2 is a feedback input end of the safety relay KA 1; the positive electrode of the control power supply DC1 is connected to the first end of the first normally-open contact NO1 and the first end of the first normally-open contact NO2, and the negative electrode of the control power supply DC1 is connected to one end of the second coil K2 and one end of the third coil K3; a second end of the first normally open contact NO1 is connected to the other end of the second coil K2; a second end of the first normally open contact NO2 is connected to the other end of the third coil K3; one end of the third normally open contact NO3 is connected to the main control unit U1, and the other end of the third normally open contact NO3 is connected to one end of the fourth normally open contact NO4; the other end of the fourth normally open contact NO4 is connected to the motor brake M1; the first end of the first normally open contact NO1 is a first input end of the safety relay KA1, and the second end is a first output end of the safety relay KA 1; the first end of the first normally open contact NO2 is a second input end of the safety relay KA1, and the second end is a second output end of the safety relay KA 1; one end of the third normally open contact NO3 is an input end of the first contactor KM1, and the other end of the third normally open contact NO3 is an output end of the first contactor KM 1; one end of the fourth normally open contact NO4 is an input end of the second contactor KM2, and the other end of the fourth normally open contact NO4 is an output end of the second contactor KM 2; the main control unit U1 is used for supplying power to the motor brake M1 and the first coil K1; the control power supply DC1 is used for supplying power to the second coil K2 and the third coil K3; the main control unit U1 is used for supplying power to the motor brake M1 and the first coil K1; the control power supply DC1 is used for supplying power to the second coil K2 and the third coil K3; at this time, referring to fig. 5, step S110 specifically includes the following steps S111-S112:
S111, responding to a brake instruction, and switching off exciting current of the first coil;
S112, determining the opening and closing states of the first normally-closed contact and the second normally-closed contact through a first feedback end, and determining the first feedback signal according to the opening and closing states of the first normally-closed contact and the second normally-closed contact.
The step S112 may further specifically be the following steps:
determining whether the first normally-closed contact and the second normally-closed contact are in an open state;
And if at least one of the first normally closed contact and the second normally closed contact is in an off state, determining that the first feedback signal is a brake release early warning signal.
In this embodiment, after receiving a braking instruction, the main control unit U1 turns off the exciting current of the first coil K1, so that the magnetic field of the first coil K1 changes, and further the first normally open contact NO1 and the first normally open contact NO2 are turned off, and the first normally closed contact NC1 and the second normally closed contact NC2 are turned on. After the exciting current of the first coil K1 is turned off, the first feedback state acquired by the main control unit U1 reflects the open/close states of the first normally-closed contact NC1 and the second normally-closed contact NC 2. Specifically, the first normally closed contact NC1 and the second normally closed contact NC2 are both in an open state, or only the first normally closed contact NC1 is in an open state, the main control unit U1 may acquire that a loop between the feedback output end and the feedback input end of the safety relay KA1 is in an open state at this time, that is, the main control unit U1 may determine that the first feedback signal at this time is a brake release early warning signal, where the brake release early warning signal indicates that the motor brake M1 may not complete braking at this time.
S120, determining whether the first feedback signal is a brake release early warning signal; if the signal is a brake release early warning signal, step S130 is executed; if the signal is not the brake release early warning signal, determining that the first feedback signal is the brake signal to be confirmed, and executing step S210.
The first feedback signal may be divided into a brake release warning signal and a brake braking waiting signal. The signal to be confirmed for braking represents that the feedback input end and the feedback output end of the safety relay KA1 are in a connection state at the moment, and at the moment, the safety relay KA1 is in an unwelded state, and whether the first contactor KM1 and the second contactor KM2 are normally disconnected or whether welding occurs needs to be further determined.
In an embodiment, referring to fig. 4, the following steps S210-S240 may be further included after the steps S110 and S120:
s210, determining that the safety relay is in an unwelded state, and respectively acquiring a second feedback signal of a feedback output end of the first contactor and a third feedback signal of a feedback output end of the second contactor through a second feedback end.
If the first feedback signal is determined to be a signal to be confirmed when braking, the safety relay KA1 can be determined to be in an unwelded state. At this time, if the second feedback signal of the first contactor KM1 and the third feedback signal of the second contactor KM2 are both open feedback signals, it may be determined that no welding occurs between the first contactor KM1, the second contactor KM2 and the safety relay KA1 at this time, the motor brake M1 is normally braked, and the main control unit U1 may send a brake acknowledgement signal.
S220, when the second feedback signal is an on feedback signal and the third feedback signal is an off feedback signal, determining that the first contactor is in a welding state, and generating second early warning information.
If the safety relay KA1 does not weld but the second feedback signal is still on, it can be determined that the first contactor KM1 is in the welded state at this time. Specifically, when the master control unit U1 issues a brake signal, the first normally open contact NO1 and the first normally open contact NO2 are both disconnected, the third normally open contact NO3 of the first contactor KM1 is normally opened, but if the third normally open contact NO3 is in a closed state, the second feedback signal is synchronously indicated as an on feedback signal, and the generated second early warning information indicates that the first contactor KM1 is in a welded state, however, since the second contactor KM2 is not welded, the motor brake M1 can be braked normally, and in particular, the third normally open contact NO3 is welded or the first feedback contact NO5 is welded.
And S230, determining that the second contactor is in a welding state when the third feedback signal is an on feedback signal and the second feedback signal is an off feedback signal, and generating third early warning information.
Correspondingly, if the safety relay KA1 is not welded and the third feedback signal is still the on feedback signal, it can be determined that the second contactor KM2 is in the welded state at this time. Specifically, when the master control unit U1 issues a brake signal, the first normally open contact NO1 and the first normally open contact NO2 are both disconnected, the fourth normally open contact NO4 of the second contactor KM2 is normally opened, but if the fourth normally open contact NO4 is in a closed state, the third feedback signal is synchronously indicated as a on feedback signal, and the generated third early warning information indicates that the second contactor KM2 is in a welded state, but since the first contactor KM1 is not welded, the motor brake M1 can be braked normally, specifically, the fourth normally open contact NO4 is welded or the second feedback contact NO6 is welded.
And S240, when the second feedback signal and the third feedback signal are both on feedback signals, determining that the first contactor and the second contactor are both in a welding state, and stopping power supply to the motor brake.
When the second feedback signal and the third feedback signal are both on feedback signals, the first contactor KM1 and the second contactor KM2 are both on, that is, the first contactor KM1 and the second contactor KM2 are both in a welding state, and the power supply loop of the motor brake M1 is always in a communication state. At this time, the main control unit U1 immediately cuts off the power supply to the motor brake M1.
In this embodiment, when the safety relay KA1 does not weld, the main control unit U1 uses the second feedback signal and the third feedback signal to comprehensively determine the welding state of the first contactor KM1 and the second contactor KM2, so that the first contactor KM1 or the second contactor KM2 that are welded can be accurately identified while braking of the motor brake M1 is ensured to be completed, so as to indicate the position where the system fails.
S130, determining that the safety relay is in a welding state, and respectively acquiring a second feedback signal of a feedback output end of the first contactor and a third feedback signal of a feedback output end of the second contactor through a second feedback end.
If the first feedback signal is a brake release early warning signal, it is determined that welding occurs to the safety relay KA1, and whether the motor brake M1 has completed braking or not needs to be further judged through the second feedback signal and the third feedback signal, and whether further measures need to be taken to complete braking of the motor brake M1.
In an embodiment, the first contactor KM1 further comprises a first feedback contact NO5; the second contactor KM2 further comprises a second feedback contact NO6; the second coil K2 simultaneously closes the third normally open contact NO3 and the first feedback contact NO5 when being electrified; the third coil K3 simultaneously closes the fourth normally open contact NO4 and the second feedback contact NO6 when being electrified; a first end of the first feedback contact NO5 is connected to the main control unit U1, and a second end of the first feedback contact NO5 is connected to the positive electrode of the control power supply DC1, the first end of the first normally open contact NO1, and the first end of the first normally open contact NO 2; the first end of the second feedback contact NO6 is connected to the main control unit U1, and the second end of the second feedback contact NO6 is connected to the positive electrode of the control power supply DC1, the first end of the first normally open contact NO1 and the first end of the first normally open contact NO 2; the first end of the first feedback contact NO5 is a feedback output end of the first contactor KM1, and the second end of the first feedback contact NO5 is a feedback input end of the first contactor KM 1; the first end of the second feedback contact NO6 is a feedback output end of the second contactor KM2, and the second end of the second feedback contact NO6 is a feedback input end of the second contactor KM 2. At this time, the step S130 may specifically include the steps of:
Determining a first open-close state of the first feedback contact and a second open-close state of the second feedback contact through a second feedback end;
Determining that the second feedback signal is an on feedback signal when the first open-close state is a closed state, and determining that the second feedback signal is an off feedback signal when the first open-close state is an off state;
the third feedback signal is determined to be an on feedback signal when the second open-close state is a closed state, while the third feedback signal is determined to be an off feedback signal when the second open-close state is an open state.
In this embodiment, when welding occurs in the safety relay KA1 and the main control unit U1 confirms that the first feedback contact NO5 is in the closed state through the second feedback end, it may be determined that the first open/close state is in the closed state at this time, that is, the second feedback signal is the on feedback signal at this time, and it may be that welding occurs in the first normally open contact NO1 in the safety relay KA1 or that welding occurs in the first contactor KM1 at this time; when the main control unit U1 confirms that the first feedback contact NO5 is in the open state through the second feedback end, it can be determined that the first contactor KM1 is opened at this time. Correspondingly, the main control unit U1 may determine whether the second contactor KM2 has completed the disconnection. It can be seen that the main control unit U1 can confirm whether the first contactor KM1 and the second contactor KM2 are disconnected through the second feedback signal and the third feedback signal, respectively, so as to confirm whether further braking measures are taken.
And S140, when one of the second feedback signal and the third feedback signal is an off feedback signal and one of the second feedback signal and the third feedback signal is an on feedback signal, determining that the motor brake is braked, and generating first early warning information.
If only one of the second feedback signal and the third feedback signal is an on feedback signal and the other is an off feedback signal, it may be determined that the power supply loop of the motor brake M1 has been cut off at this time, and the first early warning information indicates that although the motor brake M1 has completed braking at this time, there is one of the first contactor KM1 and the second contactor KM2 that is not turned off, the first normally open contact NO1 corresponding to the first contactor KM1 that is not turned off is welded, or the first normally open contact NO2 corresponding to the second contactor KM2 that is not turned off is welded.
In an embodiment, the safety relay KA1 includes a first coil K1, a first normally closed contact NC1, a second normally closed contact NC2, a first normally open contact NO1, and a first normally open contact NO2; the first contactor KM1 comprises a second coil K2 and a third normally open contact NO3; the second contactor KM2 includes a third coil K3 and a fourth normally open contact NO4; when the first coil K1 is electrified, the first normally-open contact NO1 is closed, the first normally-closed contact NC1 is opened, the first normally-open contact NO2 is closed, the second normally-closed contact NC2 is opened, and the motor brake M1 is released; when the first coil K1 is powered off, the first normally-open contact NO1 is opened, the first normally-closed contact NC1 is closed, the first normally-open contact NO2 is opened, the second normally-closed contact NC2 is closed, and the motor brake M1 is braked; the second coil K2 closes the third normally open contact NO3 when being electrified; the third coil K3 closes the fourth normally open contact NO4 when being electrified; one end of the second coil K2 is an enabling output end of the first contactor KM1, and the other end is an enabling input end of the first contactor KM 1; one end of the third coil K3 is an enabling output end of the second contactor KM2, and the other end is an enabling input end of the second contactor KM 2; two ends of the first coil K1 are enabling ends of the safety relay KA1 and are connected to the main control unit U1; a first end of the first normally-closed contact NC1 is connected to a first end of the second normally-closed contact NC2, and a second end of the first normally-closed contact NC1 is connected to the main control unit U1; the second end of the second normally-closed contact NC2 is connected to the positive electrode of the control power supply DC1, the first end of the first normally-open contact NO1 and the first end of the first normally-open contact NO2; the second end of the first normally closed contact NC1 is a feedback output end of the safety relay KA1, and the second end of the second normally closed contact NC2 is a feedback input end of the safety relay KA 1; the positive electrode of the control power supply DC1 is connected to the first end of the first normally-open contact NO1 and the first end of the first normally-open contact NO2, and the negative electrode of the control power supply DC1 is connected to one end of the second coil K2 and one end of the third coil K3; a second end of the first normally open contact NO1 is connected to the other end of the second coil K2; a second end of the first normally open contact NO2 is connected to the other end of the third coil K3; one end of the third normally open contact NO3 is connected to the main control unit U1, and the other end of the third normally open contact NO3 is connected to one end of the fourth normally open contact NO4; the other end of the fourth normally open contact NO4 is connected to the motor brake M1; the first end of the first normally open contact NO1 is a first input end of the safety relay KA1, and the second end is a first output end of the safety relay KA 1; the first end of the first normally open contact NO2 is a second input end of the safety relay KA1, and the second end is a second output end of the safety relay KA 1; one end of the third normally open contact NO3 is an input end of the first contactor KM1, and the other end of the third normally open contact NO3 is an output end of the first contactor KM 1; one end of the fourth normally open contact NO4 is an input end of the second contactor KM2, and the other end of the fourth normally open contact NO4 is an output end of the second contactor KM 2; the main control unit U1 is used for supplying power to the motor brake M1 and the first coil K1; the control power supply DC1 is used for supplying power to the second coil K2 and the third coil K3, and the first early warning information indicates that the first normally open contact NO1 is in a welding state or the second normally open contact NO2 is in a welding state; at this time, the step S140 may specifically include the following steps:
When the second feedback signal is an on feedback signal and the third feedback signal is an off feedback signal, determining that the first normally open contact is in a welding state, and generating first early warning information indicating that the first normally open contact is in the welding state;
and when the third feedback signal is an on feedback signal and the second feedback signal is an off feedback signal, determining that the second normally open contact is in a welding state, and generating first early warning information indicating that the second normally open contact is in the welding state.
In this embodiment, if the second feedback signal is the on feedback signal, it may be determined that the first normally open contact NO1 is in the welding state at this time, and the first early warning information indicates that the first normally open contact NO1 is in the welding state at this time, or may indicate that the third normally open contact NO3 or the first feedback contact NO5 is in the welding state, so that maintenance and judgment are required after the motor brake M1 is braked. Correspondingly, if the third feedback signal is a turn-on feedback signal, it can be determined that the first normally open contact NO2 is in a welding state at this time, and the first early warning information indicates that the first normally open contact NO2 is in a welding state at this time, or indicates that the fourth normally open contact NO4 or the second feedback contact NO6 is in a welding state, so that maintenance and judgment are required after the motor brake M1 is braked. Therefore, when the welding occurs to the safety relay KA1, the specific welding position in the safety relay KA1 can be accurately determined through the second feedback signal and the third feedback signal.
And S150, stopping power supply to the motor brake when the second feedback signal and the third feedback signal are both on feedback signals.
If the safety relay KA1 is already in the welding state and the second feedback signal and the third feedback signal are both on feedback signals, it can be determined that the power supply loop of the motor brake M1 is not cut off at this time, and the power supply to the motor brake M1 needs to be directly cut off, specifically, the power supply to the motor brake M1 by the brake power supply DC2 can be directly cut off by the PLC controller PLC 1.
In an embodiment, the safety relay KA1 includes a first coil K1, a first normally closed contact NC1, a second normally closed contact NC2, a first normally open contact NO1, and a first normally open contact NO2; the first contactor KM1 comprises a second coil K2 and a third normally open contact NO3; the second contactor KM2 includes a third coil K3 and a fourth normally open contact NO4; when the first coil K1 is electrified, the first normally-open contact NO1 is closed, the first normally-closed contact NC1 is opened, the first normally-open contact NO2 is closed, the second normally-closed contact NC2 is opened, and the motor brake M1 is released; when the first coil K1 is powered off, the first normally-open contact NO1 is opened, the first normally-closed contact NC1 is closed, the first normally-open contact NO2 is opened, the second normally-closed contact NC2 is closed, and the motor brake M1 is braked; the second coil K2 closes the third normally open contact NO3 when being electrified; the third coil K3 closes the fourth normally open contact NO4 when being electrified; one end of the second coil K2 is an enabling output end of the first contactor KM1, and the other end is an enabling input end of the first contactor KM 1; one end of the third coil K3 is an enabling output end of the second contactor KM2, and the other end is an enabling input end of the second contactor KM 2; two ends of the first coil K1 are enabling ends of the safety relay KA1 and are connected to the main control unit U1; a first end of the first normally-closed contact NC1 is connected to a first end of the second normally-closed contact NC2, and a second end of the first normally-closed contact NC1 is connected to the main control unit U1; the second end of the second normally-closed contact NC2 is connected to the positive electrode of the control power supply DC1, the first end of the first normally-open contact NO1 and the first end of the first normally-open contact NO2; the second end of the first normally closed contact NC1 is a feedback output end of the safety relay KA1, and the second end of the second normally closed contact NC2 is a feedback input end of the safety relay KA 1; the positive electrode of the control power supply DC1 is connected to the first end of the first normally-open contact NO1 and the first end of the first normally-open contact NO2, and the negative electrode of the control power supply DC1 is connected to one end of the second coil K2 and one end of the third coil K3; a second end of the first normally open contact NO1 is connected to the other end of the second coil K2; a second end of the first normally open contact NO2 is connected to the other end of the third coil K3; one end of the third normally open contact NO3 is connected to the main control unit U1, and the other end of the third normally open contact NO3 is connected to one end of the fourth normally open contact NO4; the other end of the fourth normally open contact NO4 is connected to the motor brake M1; the first end of the first normally open contact NO1 is a first input end of the safety relay KA1, and the second end is a first output end of the safety relay KA 1; the first end of the first normally open contact NO2 is a second input end of the safety relay KA1, and the second end is a second output end of the safety relay KA 1; one end of the third normally open contact NO3 is an input end of the first contactor KM1, and the other end of the third normally open contact NO3 is an output end of the first contactor KM 1; one end of the fourth normally open contact NO4 is an input end of the second contactor KM2, and the other end of the fourth normally open contact NO4 is an output end of the second contactor KM 2; the main control unit U1 is used for supplying power to the motor brake M1 and the first coil K1; the control power supply DC1 is used for supplying power to the second coil K2 and the third coil K3;
After stopping the power supply to the motor brake when the second feedback signal and the third feedback signal are both on feedback signals, the method further comprises:
Generating fourth early warning information, wherein the fourth early warning information indicates that the first normally open contact and the second normally open contact are in a welding state.
In this embodiment, after it is determined that the safety relay KA1 is welded, when the second feedback signal and the third feedback signal are both on feedback signals, it may be determined that the first normally open contact NO1 and the first normally open contact NO2 are both in a welded state at this time, and the fourth early warning information indicates that the first normally open contact NO1 and the first normally open contact NO2 are both in a welded state at this time, and there may be a case where one or more of the third normally open contact NO3, the first feedback contact NO5, the fourth normally open contact NO4, and the second feedback contact NO6 are welded.
Based on the control system and the control system thereof provided by the embodiment of the invention, the control method for the motor brake of the new energy stereo garage lifting equipment provided by the embodiment of the invention obtains the first feedback signal, the second feedback signal and the third feedback signal of the safety relay, the first contactor and the second contactor through the main control unit, can sensitively sense when the safety relay is welded, and can switch on the feedback signals when the second feedback signal and the third feedback signal are both switching on feedback signals, namely, when the first contactor and the second contactor are influenced by the welding of the safety relay and are not switched off, the power supply of the motor brake is timely switched off so as to brake the motor brake; on the other hand, if one of the first contactor and the second contactor is disconnected when the safety relay is in fusion connection, the main control unit can flexibly determine that the power supply loop of the motor brake is disconnected at the moment, and then corresponding first early warning information is generated so as to indicate the fusion connection state under the condition of ensuring safety. Furthermore, the main control unit can sensitively and timely acquire the welding state of the safety relay and take braking measures for motor braking, and can simultaneously acquire the position with faults under the condition of ensuring safety, so that the reliability and stability of the motor braking control of the stereo garage are effectively improved.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims (10)

1. The new energy stereo garage hoisting equipment motor brake control system is characterized by comprising a main control unit, a safety relay, a control power supply, a first contactor, a second contactor and a motor brake;
The main control unit is connected to the enabling end of the safety relay; the positive electrode of the control power supply is connected to the first input end and the second input end of the safety relay, and the negative electrode of the control power supply is connected to the enabling output end of the first contactor and the enabling output end of the second contactor; an enabling input of the first contactor is connected to a first output of the safety relay; an enabling input end of the second contactor is connected to a second output end of the safety relay; the main control unit is connected to the input end of the first contactor, the output end of the first contactor is connected to the input end of the second contactor, and the output end of the second contactor is connected to the motor brake; the feedback input end of the safety relay is simultaneously connected to the first input end, the second input end and the positive electrode of the control power supply of the safety relay, and the feedback output end of the safety relay is connected to the first feedback end of the main control unit; the feedback input end of the first contactor and the feedback input end of the second contactor are both connected to the input end of the safety relay and the positive electrode of the control power supply at the same time; the feedback output end of the first contactor and the feedback output end of the second contactor are both connected to the second feedback end of the main control unit at the same time;
The main control unit is used for sending a brake braking signal to the safety relay and supplying power to the motor brake through the first contactor and the second contactor so as to release the motor brake; the main control unit is also used for acquiring a first feedback signal of the safety relay, a second feedback signal of the first contactor and a third feedback signal of the second contactor; the safety relay is used for switching on the first contactor and the second contactor when the power is on so that the main control unit supplies power to the motor brake and enables the motor brake to be released, and is used for switching off the connection between the input end and the output end of the first contactor and/or the connection between the input end and the output end of the second contactor when the power is off so that the motor brake is braked; the main control unit is also used for determining that the safety relay is in a welding state or an unwelded state according to the first feedback signal of the safety relay, and stopping supplying power to the motor brake when the second feedback signal and the third feedback signal are both on feedback signals so as to enable the motor brake to brake.
2. The new energy stereo garage hoisting equipment motor brake control system of claim 1, wherein the safety relay comprises a first coil, a first normally closed contact, a second normally closed contact, a first normally open contact and a second normally open contact; the first contactor comprises a second coil and a third normally open contact; the second contactor comprises a third coil and a fourth normally open contact; when the first coil is electrified, the first normally-open contact is closed and the first normally-closed contact is opened, the second normally-open contact is closed and the second normally-closed contact is opened, and the motor brake is released; when the first coil is powered off, the first normally-open contact is opened, the first normally-closed contact is closed, the second normally-open contact is opened, the second normally-closed contact is closed, and the motor is braked; the second coil closes the third normally open contact when energized; the third coil closes the fourth normally open contact when energized; one end of the second coil is an enabling output end of the first contactor, and the other end of the second coil is an enabling input end of the first contactor; one end of the third coil is an enabling output end of the second contactor, and the other end of the third coil is an enabling input end of the second contactor;
The two ends of the first coil are the enabling ends of the safety relay and are connected to the main control unit; the first end of the first normally-closed contact is connected to the first end of the second normally-closed contact, and the second end of the first normally-closed contact is connected to the main control unit; the second end of the second normally-closed contact is connected to the positive electrode of the control power supply, the first end of the first normally-open contact and the first end of the second normally-open contact; the second end of the first normally-closed contact is a feedback output end of the safety relay, and the second end of the second normally-closed contact is a feedback input end of the safety relay;
The positive electrode of the control power supply is connected to the first end of the first normally-open contact and the first end of the second normally-open contact, and the negative electrode of the control power supply is connected to one end of the second coil and one end of the third coil; a second end of the first normally open contact is connected to the other end of the second coil; a second end of the second normally open contact is connected to the other end of the third coil; one end of the third normally open contact is connected to the main control unit, and the other end of the third normally open contact is connected to one end of the fourth normally open contact; the other end of the fourth normally open contact is connected to the motor brake; the first end of the first normally open contact is a first input end of the safety relay, and the second end of the first normally open contact is a first output end of the safety relay; the first end of the second normally open contact is a second input end of the safety relay, and the second end is a second output end of the safety relay; one end of the third normally open contact is an input end of the first contactor, and the other end of the third normally open contact is an output end of the first contactor; one end of the fourth normally open contact is an input end of the second contactor, and the other end of the fourth normally open contact is an output end of the second contactor;
The main control unit is used for supplying power to the motor brake and the first coil; the control power supply is used for supplying power to the second coil and the third coil.
3. The new energy stereo garage hoisting equipment motor brake control system of claim 2, wherein the first contactor further comprises a first feedback contact; the second contactor further comprises a second feedback contact; the second coil simultaneously closes the third normally open contact and the first feedback contact when energized; the third coil simultaneously closes the fourth normally open contact and the second feedback contact when energized;
The first end of the first feedback contact is connected to the main control unit, and the second end of the first feedback contact is connected to the positive electrode of the control power supply, the first end of the first normally open contact and the first end of the second normally open contact; the first end of the second feedback contact is connected to the main control unit, and the second end of the second feedback contact is connected to the positive electrode of the control power supply, the first end of the first normally open contact and the first end of the second normally open contact; the first end of the first feedback contact is a feedback output end of the first contactor, and the second end of the first feedback contact is a feedback input end of the first contactor; the first end of the second feedback contact is the feedback output end of the second contactor, and the second end of the second feedback contact is the feedback input end of the second contactor.
4. The new energy stereo garage hoisting equipment motor brake control system according to any one of claims 1-3, wherein the main control unit comprises a frequency converter, a PLC controller and a brake power supply; the frequency converter is connected to the enabling end of the safety relay; the PLC is connected to the brake power supply; the first feedback end of the PLC is connected to the feedback output end of the safety relay, and the second feedback end of the PLC is connected to the feedback output end of the first contactor and the feedback output end of the second contactor; the brake power supply is connected to the input end of the first contactor; the second feedback end of the PLC is the second feedback end of the main control unit, and the first feedback end of the PLC is the first feedback end of the main control unit;
The frequency converter is used for sending a brake braking signal to the safety relay, and the brake power supply is used for supplying power to the motor brake through the first contactor and the second contactor so as to release the motor brake; the PLC is used for acquiring a first feedback signal of the safety relay, a second feedback signal of the first contactor and a third feedback signal of the second contactor; the PLC is further used for stopping supplying power to the braking power supply to enable the motor to brake when the second feedback signal and the third feedback signal are both on feedback signals, and determining that the safety relay is in a welding state or an unwelded state according to the first feedback signal of the safety relay.
5. A method for controlling braking of a new energy stereo garage lifting equipment motor, which is applied to a main control unit in a new energy stereo garage lifting equipment motor braking control system according to any one of claims 1-4, and is characterized in that the method comprises the following steps:
Responding to a braking instruction, sending a braking signal to an enabling end of the safety relay, and acquiring a first feedback signal output by a feedback output end of the safety relay through a first feedback end;
If the first feedback signal is determined to be a brake release early warning signal, determining that the safety relay is in a welding state, and respectively acquiring a second feedback signal of a feedback output end of the first contactor and a third feedback signal of a feedback output end of the second contactor through a second feedback end;
when one of the second feedback signal and the third feedback signal is an off feedback signal and one of the second feedback signal and the third feedback signal is an on feedback signal, determining that the motor brake is braked, and generating first early warning information;
And stopping power supply to the motor brake when the second feedback signal and the third feedback signal are both on feedback signals.
6. The method for controlling the braking of the motor of the lifting equipment of the new energy stereo garage according to claim 5, wherein the safety relay comprises a first coil, a first normally closed contact, a second normally closed contact, a first normally open contact and a second normally open contact; the first contactor comprises a second coil and a third normally open contact; the second contactor comprises a third coil and a fourth normally open contact; when the first coil is electrified, the first normally-open contact is closed and the first normally-closed contact is opened, the second normally-open contact is closed and the second normally-closed contact is opened, and the motor brake is released; when the first coil is powered off, the first normally-open contact is opened, the first normally-closed contact is closed, the second normally-open contact is opened, the second normally-closed contact is closed, and the motor is braked; the second coil closes the third normally open contact when energized; the third coil closes the fourth normally open contact when energized; one end of the second coil is an enabling output end of the first contactor, and the other end of the second coil is an enabling input end of the first contactor; one end of the third coil is an enabling output end of the second contactor, and the other end of the third coil is an enabling input end of the second contactor; the two ends of the first coil are the enabling ends of the safety relay and are connected to the main control unit; the first end of the first normally-closed contact is connected to the first end of the second normally-closed contact, and the second end of the first normally-closed contact is connected to the main control unit; the second end of the second normally-closed contact is connected to the positive electrode of the control power supply, the first end of the first normally-open contact and the first end of the second normally-open contact; the second end of the first normally-closed contact is a feedback output end of the safety relay, and the second end of the second normally-closed contact is a feedback input end of the safety relay; the positive electrode of the control power supply is connected to the first end of the first normally-open contact and the first end of the second normally-open contact, and the negative electrode of the control power supply is connected to one end of the second coil and one end of the third coil; a second end of the first normally open contact is connected to the other end of the second coil; a second end of the second normally open contact is connected to the other end of the third coil; one end of the third normally open contact is connected to the main control unit, and the other end of the third normally open contact is connected to one end of the fourth normally open contact; the other end of the fourth normally open contact is connected to the motor brake; the first end of the first normally open contact is a first input end of the safety relay, and the second end of the first normally open contact is a first output end of the safety relay; the first end of the second normally open contact is a second input end of the safety relay, and the second end is a second output end of the safety relay; one end of the third normally open contact is an input end of the first contactor, and the other end of the third normally open contact is an output end of the first contactor; one end of the fourth normally open contact is an input end of the second contactor, and the other end of the fourth normally open contact is an output end of the second contactor; the main control unit is used for supplying power to the motor brake and the first coil; the control power supply is used for supplying power to the second coil and the third coil;
the response brake instruction sends a brake signal to an enabling end of the safety relay, and obtains a first feedback signal output by a feedback output end of the safety relay through a first feedback end, and the response brake instruction comprises:
Switching off exciting current of the first coil in response to a braking instruction;
determining the opening and closing states of the first normally-closed contact and the second normally-closed contact through a first feedback end, and determining the first feedback signal according to the opening and closing states of the first normally-closed contact and the second normally-closed contact;
The determining the first feedback signal according to the open-close states of the first normally-closed contact and the second normally-closed contact includes:
And if at least one of the first normally closed contact and the second normally closed contact is in an off state, determining that the first feedback signal is a brake release early warning signal.
7. The method for controlling the braking of a motor of a lifting device of a new energy stereo garage according to claim 6, wherein the first contactor further comprises a first feedback contact; the second contactor further comprises a second feedback contact; the second coil simultaneously closes the third normally open contact and the first feedback contact when energized; the third coil simultaneously closes the fourth normally open contact and the second feedback contact when energized; the first end of the first feedback contact is connected to the main control unit, and the second end of the first feedback contact is connected to the positive electrode of the control power supply, the first end of the first normally open contact and the first end of the second normally open contact; the first end of the second feedback contact is connected to the main control unit, and the second end of the second feedback contact is connected to the positive electrode of the control power supply, the first end of the first normally open contact and the first end of the second normally open contact; the first end of the first feedback contact is a feedback output end of the first contactor, and the second end of the first feedback contact is a feedback input end of the first contactor; the first end of the second feedback contact is a feedback output end of the second contactor, and the second end of the second feedback contact is a feedback input end of the second contactor;
If the first feedback signal is determined to be a brake release early warning signal, determining that the safety relay is in a welding state, and respectively acquiring a second feedback signal of a feedback output end of the first contactor and a third feedback signal of a feedback output end of the second contactor through a second feedback end, wherein the method comprises the following steps:
Determining a first open-close state of the first feedback contact and a second open-close state of the second feedback contact through a second feedback end;
Determining that the second feedback signal is an on feedback signal when the first open-close state is a closed state, and determining that the second feedback signal is an off feedback signal when the first open-close state is an off state;
the third feedback signal is determined to be an on feedback signal when the second open-close state is a closed state, while the third feedback signal is determined to be an off feedback signal when the second open-close state is an open state.
8. The method for controlling the motor brake of the new energy stereo garage lifting device according to claim 5, wherein after the response to the brake command, the method sends a brake signal to the enabling end of the safety relay, and obtains the first feedback signal output by the feedback output end of the safety relay through the first feedback end, the method further comprises:
If the first feedback signal is determined to be a brake braking signal to be confirmed, determining that the safety relay is in an unwelded state, and respectively acquiring a second feedback signal of a feedback output end of the first contactor and a third feedback signal of a feedback output end of the second contactor through a second feedback end;
When the second feedback signal is an on feedback signal and the third feedback signal is an off feedback signal, determining that the first contactor is in a welding state, and generating second early warning information;
When the third feedback signal is an on feedback signal and the second feedback signal is an off feedback signal, determining that the second contactor is in a welding state, and generating third early warning information;
And when the second feedback signal and the third feedback signal are both on feedback signals, determining that the first contactor and the second contactor are both in a welding state, and stopping power supply to the motor brake.
9. The method for controlling the braking of the motor of the lifting equipment of the new energy stereo garage according to claim 5, wherein the safety relay comprises a first coil, a first normally closed contact, a second normally closed contact, a first normally open contact and a second normally open contact; the first contactor comprises a second coil and a third normally open contact; the second contactor comprises a third coil and a fourth normally open contact; when the first coil is electrified, the first normally-open contact is closed and the first normally-closed contact is opened, the second normally-open contact is closed and the second normally-closed contact is opened, and the motor brake is released; when the first coil is powered off, the first normally-open contact is opened, the first normally-closed contact is closed, the second normally-open contact is opened, the second normally-closed contact is closed, and the motor is braked; the second coil closes the third normally open contact when energized; the third coil closes the fourth normally open contact when energized; one end of the second coil is an enabling output end of the first contactor, and the other end of the second coil is an enabling input end of the first contactor; one end of the third coil is an enabling output end of the second contactor, and the other end of the third coil is an enabling input end of the second contactor; the two ends of the first coil are the enabling ends of the safety relay and are connected to the main control unit; the first end of the first normally-closed contact is connected to the first end of the second normally-closed contact, and the second end of the first normally-closed contact is connected to the main control unit; the second end of the second normally-closed contact is connected to the positive electrode of the control power supply, the first end of the first normally-open contact and the first end of the second normally-open contact; the second end of the first normally-closed contact is a feedback output end of the safety relay, and the second end of the second normally-closed contact is a feedback input end of the safety relay; the positive electrode of the control power supply is connected to the first end of the first normally-open contact and the first end of the second normally-open contact, and the negative electrode of the control power supply is connected to one end of the second coil and one end of the third coil; a second end of the first normally open contact is connected to the other end of the second coil; a second end of the second normally open contact is connected to the other end of the third coil; one end of the third normally open contact is connected to the main control unit, and the other end of the third normally open contact is connected to one end of the fourth normally open contact; the other end of the fourth normally open contact is connected to the motor brake; the first end of the first normally open contact is a first input end of the safety relay, and the second end of the first normally open contact is a first output end of the safety relay; the first end of the second normally open contact is a second input end of the safety relay, and the second end is a second output end of the safety relay; one end of the third normally open contact is an input end of the first contactor, and the other end of the third normally open contact is an output end of the first contactor; one end of the fourth normally open contact is an input end of the second contactor, and the other end of the fourth normally open contact is an output end of the second contactor; the main control unit is used for supplying power to the motor brake and the first coil; the control power supply is used for supplying power to the second coil and the third coil;
The first early warning information indicates that the first normally open contact is in a welding state or the second normally open contact is in a welding state; and when one of the second feedback signal and the third feedback signal is an off feedback signal and the other of the second feedback signal and the third feedback signal is an on feedback signal, determining that the motor brake is braked, and generating first early warning information, including:
When the second feedback signal is an on feedback signal and the third feedback signal is an off feedback signal, determining that the first normally open contact is in a welding state, and generating first early warning information indicating that the first normally open contact is in the welding state;
and when the third feedback signal is an on feedback signal and the second feedback signal is an off feedback signal, determining that the second normally open contact is in a welding state, and generating first early warning information indicating that the second normally open contact is in the welding state.
10. The method for controlling the motor brake of the new energy stereo garage hoisting device according to claim 9, wherein after stopping the power supply to the motor brake when the second feedback signal and the third feedback signal are both on feedback signals, further comprising:
Generating fourth early warning information, wherein the fourth early warning information indicates that the first normally open contact and the second normally open contact are in a welding state.
CN202410018149.6A 2024-01-05 2024-01-05 New energy stereo garage hoisting equipment motor brake control system and control method Active CN117526773B (en)

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