CN211056433U - Household elevator - Google Patents
Household elevator Download PDFInfo
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- CN211056433U CN211056433U CN201921414434.0U CN201921414434U CN211056433U CN 211056433 U CN211056433 U CN 211056433U CN 201921414434 U CN201921414434 U CN 201921414434U CN 211056433 U CN211056433 U CN 211056433U
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- elevator
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- frequency converter
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Abstract
The application discloses home use elevator, the circuit includes: the device comprises a frequency converter, a motor, an encoder, a proximity switch and a time relay; the frequency converter is connected with a brake relay, and the brake relay is used for cutting off the power supply of the home elevator according to a signal from a controller of the home elevator; the frequency converter is connected with the motor through a three-phase output end; one end of the proximity switch is connected with a first motor control interface of the frequency converter, the other end of the proximity switch is connected with the time relay, and the other end of the time relay is connected with the controller so as to control the motor to rotate through the controller, the time relay and the time relay; the closing of the proximity switch and the time relay is controlled by the controller; and the frequency converter is provided with an encoder, and the encoder determines the rotating speed of the motor according to the displacement of the household elevator determined by the controller and the corresponding relation between the prestored elevator displacement and the rotating speed of the motor, and sends the rotating speed to the motor through the frequency converter. This application can guarantee that the motor stroke is accurate to make the elevator even running.
Description
The technical field is as follows:
the invention relates to the field of electronic circuits, in particular to a household elevator.
Background art:
an elevator is a transport device serving a number of specific floors in a building, the cars of which travel in at least two rigid tracks perpendicular to the horizontal or inclined at an angle of less than 15 ° to the vertical.
With the technical innovation and social development, a home elevator suitable for villas or small high-rise buildings is produced, brings great convenience to the life of users, and enables the users to safely and quickly reach the appointed floors.
The existing household elevator is driven by a motor to operate in the operation process due to the structural characteristics of villas and small high-rise buildings. Therefore, the home elevator applicable to villas and the like needs to be improved in structure and electricity to provide protection for the motor.
The invention content is as follows:
the embodiment of the invention provides a home elevator, which can be improved from the structural and electrical aspects, so that multiple protection is provided for the elevator.
In a first aspect, an embodiment of the present application provides a home elevator, including: the device comprises a frequency converter, a motor, an encoder, a proximity switch and a time relay;
the frequency converter is connected with a brake relay, and the brake relay is used for cutting off the power supply of the home elevator according to a signal from a controller of the home elevator;
the frequency converter is connected with the motor through a three-phase output end;
one end of the proximity switch is connected with a first motor control interface of the frequency converter, the other end of the proximity switch is connected with the time relay, and the other end of the time relay is connected with the controller so as to control the rotation of the motor through the controller, the proximity switch and the time relay; the proximity switch is switched off when the displacement of the elevator reaches a threshold value, and the time relay is switched off when the movement time of the elevator reaches the threshold value; wherein the closing of the proximity switch and the time relay is controlled by the controller;
the frequency converter is provided with the encoder, and the encoder determines the rotating speed of the motor according to the displacement of the home elevator from the current floor to the target floor determined by the controller and the corresponding relation between the prestored elevator displacement and the rotating speed of the motor, and sends the rotating speed to the motor through the frequency converter.
In one example, the frequency converter is connected to the encoder via a PG (Pulse Generator) card.
In one example, the type of the frequency converter includes: AS 320.
In one example, the circuit further comprises: a first relay and a second relay;
the first relay and the second relay are respectively connected with a second motor control interface and a third motor control interface of the frequency converter;
the controller controls the household elevator to ascend through the first relay, and the controller controls the household elevator to descend through the second relay.
In one example, an interlock circuit of the first relay and the second relay is further connected to the frequency converter.
In one example, the circuit further comprises: a brake resistor;
the brake relay is connected with the controller, and emergency braking is realized according to the instruction of the controller;
the brake resistor is used for cooperating with the brake relay to execute emergency braking.
In one example, the elevator further comprises: an overweight detection device;
the overweight detection device comprises: the middle section of the fixed beam is hinged with the top of the lift car;
the two reversing pulleys are respectively arranged at two ends of the fixed beam;
the lifting piece is connected with the fixed beam and comprises a reel with a rope groove and a cable wound on the reel, the reel is arranged between the two reversing pulleys and is offset from the midpoint of the connecting line of the two reversing pulleys, the cable is rotated by the two reversing pulleys to extend backwards and upwards, and the lengths of the cables on the two sides of the reel are different;
one end of the motor is connected with the reel, and the other end of the motor extends to the end part of the fixed beam far away from the reel and forms an indicating end; the motor is connected with the fixed beam through the connecting seat;
the displacement monitoring piece is used for monitoring the displacement of the indicating end and is electrically connected with the controller.
In one example, the displacement monitoring piece comprises a contact switch, the contact switch is arranged on one of the indicating end or the car, a triggering part is arranged on the other of the indicating end or the car, and the triggering part triggers the contact switch when the displacement of the indicating end is larger than a set threshold value.
In one example, the elevator further comprises:
an elastic member connected to the rope to carry the car, the elastic member having a rated deformation amount;
a loose position switch for detecting a change in the elastic member below the rated deformation amount;
the actuating piece is connected with the elastic piece, the position of the actuating piece changes along with the deformation of the elastic piece, and the position of the actuating piece comprises a first position interval for turning on the loose position switch and a second position interval for turning off the loose position switch.
In a second aspect, an embodiment of the present application provides a method for protecting and controlling a frequency converter for an elevator, where the method includes:
the controller acquires current position information and terminal position information of the home elevator based on the triggering of an elevator button by a user;
the controller determines the target displacement of the home elevator according to the current position information and the terminal position information;
the encoder receives the target displacement and determines the rotating speed of the motor according to the corresponding relation between the prestored elevator displacement and the rotating speed;
the controller sends the target displacement to the proximity switch, and the proximity switch is switched off when the displacement of the home elevator is the target displacement; the controller calculates the off time of the time relay according to the target displacement of the home elevator and the moving speed of the elevator, and sends the off time of the time relay to the time relay;
and when the time relay and/or the proximity switch are/is switched off, the frequency converter stops outputting power to the motor.
The embodiment of the application provides a converter protection circuit for elevator, the rotational speed of control motor that cooperation through encoder and converter can be reasonable to guarantee elevator safe operation. The proximity switch and the time relay are connected in series in the circuit, so that when any one of the proximity switch and the time relay is in an off state, no signal is input to a motor control port connected with the proximity switch, and the frequency converter stops outputting power to the motor. The condition of triggering the proximity switch to be switched off is that the displacement of the elevator reaches a preset value, and the condition of triggering the time relay to be switched off is that the moving time of the elevator reaches a preset threshold value. Therefore, the protection circuit provided by the embodiment of the application can protect the home elevator from three aspects of motor rotating speed, elevator moving distance and elevator moving time, so that the situation that the elevator moving distance is larger than the preset elevator stroke is prevented, multiple protection is provided for the home motor, the motor stroke is guaranteed to be accurate, and the home elevator is enabled to run stably.
Description of the drawings:
fig. 1 is a schematic structural diagram of a frequency converter protection circuit for an elevator according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an elevator provided in an embodiment of the present application;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
fig. 4 is a schematic partial structural view of an electric machine according to an embodiment of the present disclosure;
FIG. 5 is an enlarged view of a portion of FIG. 1 at B;
fig. 6 is a flowchart of an elevator protection control method according to an embodiment of the present application.
The specific implementation mode is as follows:
in order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
The embodiment of the application provides a converter protection circuit for elevator, as shown in fig. 1, includes: the device comprises a frequency converter, a motor M, an encoder, a controller, a proximity switch SQ and a time relay KT.
The power input end R, S interface of the frequency converter is respectively connected with the live wire and the zero wire. The frequency converter receives a positive level signal and a negative level signal through the signal input end 1A and the signal input end 1B respectively. And a brake relay KA3 is arranged on the interface 1B, and the brake relay KA3 is used for emergency braking so as to improve the safety of the elevator.
The frequency converter is connected with a motor M through a three-phase output end U, V, W and a lead. The encoder is used for setting up the operating parameter of motor, and the operating parameter includes: a plurality of rotating speeds of the motor and a moving distance of the elevator corresponding to each rotating speed. The frequency converter is connected with the encoder through the PG card. The frequency converter is connected with the proximity switch SQ and the time relay KT through a time input end X2, namely a first motor control interface. X3 and X4 interfaces on the frequency converter are respectively connected with a first relay KA1 and a second relay KA 2. In addition, an interlocking circuit of the first relay KA1 and the second relay KA2 is connected to the X1 interface of the frequency converter, so that the first relay KA1 and the second relay KA2 are prevented from being simultaneously switched on.
One end of the proximity switch is connected with a time input end X2 of the frequency converter, the other end of the proximity switch is connected with the time relay and the controller, and the other end of the time relay is connected with the controller; the time input end X2 is used for controlling the disconnection of the three-phase output end and the motor, wherein the three-phase output end and the motor are in a connection state when the elevator runs; the proximity switch is turned off when the moving distance of the elevator reaches a threshold value, and the time relay is turned off when the moving time of the elevator reaches the threshold value.
In the embodiment of the application, the working principle of the time relay KT is that the time relay KT is automatically switched off when the current time reaches the preset elevator running time. Based on the principle, the approach switch SQ and the time relay KT are connected in series on a time input end X2, namely a first motor control interface, when any one of the stroke of the elevator and the running time of the elevator reaches a preset value, the time relay KT or the approach switch SQ is triggered to be disconnected, so that the three-phase output end is disconnected with the motor, the frequency converter does not output the power of the motor any more, and therefore multiple protection is carried out on the elevator according to the stroke and the running time of the elevator.
One pin of the controller is connected with a first relay KA1 so as to control the elevator to ascend through the first relay KA 1; the other pin is connected with a second relay KA2 to control the elevator to descend through the second relay KA 2. Meanwhile, the controller is also connected with a proximity switch SQ, a time relay KT, a brake relay KA3 and an encoder. The specific functions are as follows: the controller is connected with the proximity switch SQ and the time relay KT so as to close the proximity switch SQ and the time relay KT when the elevator is started every time. The controller is connected with a brake relay KA3 to realize that the elevator emergency brake is controlled by the brake relay KA3 when an emergency situation occurs. In the embodiment of the application, before the elevator is started, the controller determines the operation parameters of the motor according to the floor selected by the user, so that the encoder controls the motor to rotate according to the operation parameters. Therefore, the controller is connected with the encoder, and the elevator operation parameters in the encoder can be set in real time.
It should be noted that the controller in the embodiment of the present application is used for controlling each circuit of the whole elevator, and is not specifically used for controlling the frequency converter protection circuit for the elevator, and therefore, the controller is not labeled in the circuit.
In the embodiment of the application, a brake resistor matched with the brake relay KA3 is also connected to the frequency converter. The brake resistor is used for cooperating with the brake relay to execute emergency braking. The model of the frequency converter is AS 320. It can be understood that the type of the frequency converter can be any type of frequency converter suitable for the embodiment of the application.
As shown in fig. 2 to 4, an embodiment of the present application provides an overweight detection device, including: the middle section of the fixed beam 1 is hinged with the top of the lift car 2; two reversing pulleys 3 respectively arranged at two ends of the fixed beam 1; the lifting piece is connected with the fixed beam 1 and comprises a reel 4 with a rope groove 6, a cable 5 wound on the reel 4 and a motor 7 connected with the reel 4, the reel 4 is arranged between the two reversing pulleys 3 and is offset from the midpoint of the connecting line of the two reversing pulleys 3, the cable 5 extends upwards after being reversed by the two reversing pulleys 3, and the lengths of the cables 5 on the two sides of the reel 4 are different; the driving piece comprises a motor 7 and a connecting seat 8, one end of the motor 7 is connected with the reel 4, the other end of the motor extends to the end part of the fixed beam 1 far away from the reel 4, one end of the motor 7 is connected with the fixed beam 1 through the connecting seat 8, and the other end of the motor forms an indicating end 9; and the displacement monitoring piece is suitable for monitoring the displacement of the indicating end 9, and the displacement monitoring piece 9 is electrically connected with the controller.
In the embodiment of the present application, since the reel 4 is offset at the midpoint of the connection line of the two diverting pulleys 3, the lengths of the cables 5 on the two sides of the reel 4 are different, and further, under the effect of the load of the car 2, the lengths of the cables 5 on the two sides of the reel 4 are different in deformation, so that the car 2 is easily tilted. Therefore through setting up the fixed beam 1 of being connected with car 2 rotation, switching-over pulley 3 sets up on fixed beam 1, and then at the length deflection of the hawser 5 of reel 4 both sides different, fixed beam 1 can rotate 2 cars relatively, and then can rotate with the difference of the adaptation of 4 both sides of reel hawser 5 length variations through fixed beam 1, and simultaneously, cooperation in the middle of car 2's guide pulley and the slide rail of indoor elevator keeps car 2's roughly balanced.
When getting into people or article in the indoor elevator, the load grow of car 2 for hawser 5 elastic deformation extension, because the length of the hawser 5 of reel 4 both sides is different, makes the length variation of the hawser 5 of reel 4 both sides different, and then makes fixed beam 1 incline for car 2 relatively, and then makes the displacement of instruction end 9 production relative car 2. When the displacement of instruction end 9 surpassed the settlement threshold value, can know fixed beam 1 and rotated and surpassed certain angle, and then can know 4 both sides hawser 5 of reel reach certain variation, and then can know 2 loads of car and surpass certain weight, can monitor through the displacement to instruction end 9 from this to monitor 2 loads of car.
In this application embodiment, the displacement monitoring piece can be a displacement sensor, can be installed at the top motor 7 of car 2, need not to set up weighing sensor's mounting structure in the bearing structure department of car 2, therefore the structure is simpler. In addition, the load of the car 2 is monitored by monitoring the displacement of the indicating end 9, and compared with a weighing sensor, the working state of the displacement sensor is more stable and accurate.
In the embodiment of the present application, the connection base 8 is provided at one end of the motor 7 connected to the reel 4. As shown in fig. 3 and 4, since the reel 4 is connected to the motor 7, the connecting base 8 is disposed at an end of the motor 7 close to the reel 4, so that the connecting base 8 is close to the center of gravity between the reel 4 and the motor 7, thereby making the lifting member more stable. In addition, whole indoor elevator is when using, because hawser 5 transmits 4 horizontal forces for reel 4 can produce certain horizontal moment, and connecting seat 8 sets up the tip that is close to motor 7 of reel 4 department, can shorten the arm of force that reel 4 produced the horizontal force, reduces the moment that the horizontal force that reel 4 produced to connecting seat 8 production.
In the embodiment of the present application, as shown in fig. 3 and 4, the motor 7 includes a gear box 701 connected to the reel 4, and a motor 702 connected to the gear box 701, the gear box 701 is connected to the fixed beam 1 through a connecting seat 8, and an end of the motor 702 facing away from the gear box 701 forms an indicating end 9. One end that motor 702 deviates from gearbox 701 forms and indicates end 9, because the car 2 of domestic indoor elevator is less, extends to car 2 department of 4 opposite sides of reel through making motor 702, is convenient for install motor 702, can make simultaneously to indicate end 9 to be far away from the pin joint of fixed beam 1 with car 2, can be when fixed beam 1 rotates certain angle, indicate end 9 to have relatively great displacement, be favorable to the monitoring more.
In the embodiment of the application, the connecting seat 8 comprises a flat plate part 801 connected with the fixed beam 1, and a vertical plate part 802 connected with the top of the flat plate part 801 and connected with the end part of the gearbox 701, which is far away from the motor 702, so that when the motor 7 is installed, the flat plate part 801 is only connected with the fixed beam 1, and the flat plate part 801 is connected with the gearbox 701, wherein the connecting seat 8 is integrally L-shaped, the connecting seat 8 is respectively connected with the fixed beam 1 and the gearbox 701 through bolts, and the connecting seat 8 is arranged at the end of the gearbox 701, which is far away from the motor 702, so that the connecting seat 8 can be conveniently connected with the fixed beam 1 on the upper side of the lift.
In the embodiment of the application, the displacement monitoring piece comprises a contact switch 10, the contact switch 10 is arranged on one of the indicating end 9 or the car 2, a triggering part 11 is arranged on the other of the indicating end 9 or the car 2, and the triggering part 11 triggers the contact switch 10 when the displacement of the indicating end 9 is larger than a set threshold value. By setting the displacement monitoring member as the contact switch 10, the corresponding indicating end 9 can be moved to a position when the car 2 is in a rated load state, so that the trigger part 11 is in contact with the contact switch 10, and the contact switch 10 is triggered, and thus whether the car 2 is overloaded or not can be monitored.
In the embodiment of the present application, as shown in fig. 3 and 4, the contact switch 10 is connected to the car 2; the monitoring mechanism further comprises a mounting bracket 12 connected with the indicating end 9, a threaded hole is formed in the mounting bracket 12, the locking mechanism further comprises a push rod 13 screwed through the threaded hole, the push rod 13 is arranged approximately along the tangential direction of rotation of the indicating end 9, and a trigger part 11 is formed at the end part, facing the contact switch 10, of the push rod 13. Wherein, the tangential direction can be that when trigger portion 11 triggers the contact switch, push rod 13 is tangent with the circle that trigger portion 11 used fixed beam 1 pin joint as the centre of a circle.
By providing the contact switch 10 on the car 2, the line of the contact switch 10 can be stabilized. The trigger part 11 is formed at the end of the push rod 13, so that the trigger part 11 can accurately trigger the contact switch 10, and the distance between the trigger part 11 and the contact switch 10 can be adjusted by rotating the push rod 13, so that the overload weight of the load of the car 2 can be conveniently adjusted.
In the embodiment of the present application, the contact switch 10 may be provided on the motor 702, and the trigger 11 may be provided on the car 2. Furthermore, the arrangement of the triggering portion 11 is not limited to the push rod 13, and in an alternative embodiment, the triggering portion 11 may be a projection fixedly connected to the motor 702 or a projection connected to the car 2.
As shown in fig. 5, the home elevator further includes: an elastic member 14, an actuating member 15 and a loose position switch 16. The loose position switch 16 is provided in a deformation direction of the elastic member 14 below a rated deformation amount. The loose position switch 16 is specifically configured to detect that the deformation of the elastic member 14 is lower than the rated deformation, that is, the elastic member 14 is transformed from a normal compressed state within the rated deformation range to an abnormal state with a deformation lower than the rated deformation, and the structural configuration change of the elastic member 14 triggers the loose position switch 16.
The actuator 15 is connected to the elastic member 14, the position of the actuator 15 changes in accordance with the amount of deformation of the elastic member 14, and the position of the actuator 15 includes a first position interval in which the loose position switch 16 is turned on and a second position interval in which the loose position switch 16 is turned off. In order to ensure that the loose position switch 16 can be accurately triggered when the deformation of the elastic member 14 is lower than the rated deformation, in the embodiment, the actuating member 15 is added, the actuating member 15 is connected with the elastic member 14, so that the actuating member 15 can obtain the capacity of expressing the deformation of the elastic member 14, the movable range of the actuating member 15 is set to be a first position interval and a second position interval along with the change of the elastic member 14, and the actuating member 15 in the first position interval indicates that the deformation of the elastic member 14 is lower than the rated deformation, so that the actuating member 15 can trigger the loose position switch 16; in contrast, if the actuator 15 in the second position interval indicates that the deformation amount of the elastic member 14 is within the rated deformation amount range, the actuator 15 cannot trigger the loose position switch 16, and the loose position switch 16 is turned off.
It will be appreciated that the loose position switch 16 can be a limit switch in contact with the actuator 15 or an electro-optical proximity switch not in contact with the actuator 15, and the specific type and installation method can be selected according to the functions of the existing product, and can be flexibly used.
In view of the above circuit structure, an embodiment of the present application provides an elevator protection control method, as shown in fig. 6, including the following steps:
and 601, the controller acquires the current position information and the terminal position information of the elevator based on the triggering of the elevator button by the user.
In the embodiment of the application, the controller needs to first determine that the elevator is not overloaded before starting the elevator. And the controller acquires the current position information and the terminal position information of the elevator according to the pressing instruction of the user. For example, the current position of the elevator is determined according to a pressing instruction input by a user through a button outside the car; and determining the terminal position of the elevator according to a pressing instruction input by a user through a button inside the elevator car. The current position information of the elevator is the floor where the elevator is located before the elevator is started. The end position information is a floor that the user wants to reach.
And step 602, the controller determines the target displacement of the elevator according to the current position information and the terminal position information.
In the embodiment of the application the target displacement of the elevator is the distance between two floors.
And 603, receiving the target displacement by the encoder, and determining the rotating speed of the motor according to the prestored corresponding relation between the elevator displacement and the rotating speed.
In the embodiment of the application, the travel of the elevator is generally divided into an acceleration section, a constant speed section and a deceleration section, and the rotating speed of the motor corresponding to each section is obviously different. The distance corresponding to each segment is related to the distance between floors. For example, the distances corresponding to the travel of the elevator from floor 1 to floor 7 are obviously greater than the distances corresponding to the travel of the elevator from floor 1 to floor 2. Thus, the encoder controls the running speed of the elevator by the motor speed and the moving distance.
And step 604, the controller calculates the off-time of the time relay according to the target displacement of the elevator and the moving speed of the elevator, and sends the off-time of the time relay to the time relay.
In the embodiment of the application, the motor rotor rotates to provide power for the operation of the elevator, so that the corresponding relation exists between the moving speed of the elevator corresponding to the rotating speed of the motor. Based on this, the controller determines the moving speed of the elevator corresponding to each motor rotation speed.
In order to ensure the stable running of the elevator, the speed change of the elevator in the acceleration section and the deceleration section needs to be ensured within a proper range, so in the embodiment of the application, the acceleration section and the deceleration section are divided again, and a speed is respectively set for each divided section to ensure the stable change of the moving speed of the elevator. For example, the acceleration section is to increase the speed of the elevator from 0 to 1, and if the acceleration section is divided into n sections, the speed corresponding to each section varies by 1/n, and obviously, the larger n is, the smoother the acceleration is. Based on the above, the elevator moving speed is determined by the elevator trip controller according to the moving speed of each elevator and the moving distance corresponding to the moving speed of each elevator.
And finally, the controller determines the disconnection time of the time relay according to the sum of the movement times so as to ensure that the elevator reaches the designated position when the relay is disconnected. It should be noted that, if the elevator does not reach the designated position when the relay is turned off, the elevator may stop running in advance, so that the elevator door cannot be opened, thereby causing an accident.
In the embodiment of the present application, the proximity switch is turned off when the displacement of the elevator is the target displacement.
And step 606, stopping outputting power to the motor by the frequency converter when the time relay and/or the proximity switch are disconnected.
In the embodiment of the application, an X2 interface of the frequency converter, a proximity switch SQ and a time relay KT are in series connection. Wherein the X2 interface is used to open or close the circuit that delivers power to the motor. Thus, when either of the proximity switch SQ and the time relay KT is open, the X2 interface of the frequency converter acts as an open circuit, i.e. breaks the circuit delivering power to the motor, to prevent the travel of the elevator from exceeding the preset movement distance.
When the protection circuit of the embodiment of the application is installed, the motor, the proximity switch, the time relay and the encoder are sequentially connected to the frequency converter, and the operating parameters corresponding to the motor are set in the encoder and comprise the stroke, the rotating speed and the like of the motor. And according to the stroke of the motor, the detection time matched with the proximity switch is arranged in the time relay. It can be understood that for a debugged elevator, the operator can directly set the detection time matched with the proximity switch in the time relay without the aid of a controller.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (8)
1. A home elevator, characterized in that the circuit comprises: the device comprises a frequency converter, a motor, an encoder, a proximity switch and a time relay;
the frequency converter is connected with a brake relay, and the brake relay is used for cutting off the power supply of the home elevator according to a signal from a controller of the home elevator;
the frequency converter is connected with the motor through a three-phase output end;
one end of the proximity switch is connected with a first motor control interface of the frequency converter, the other end of the proximity switch is connected with the time relay, and the other end of the time relay is connected with the controller so as to control the rotation of the motor through the controller, the proximity switch and the time relay; the proximity switch is switched off when the displacement of the elevator reaches a threshold value, and the time relay is switched off when the movement time of the elevator reaches the threshold value; wherein the closing of the proximity switch and the time relay is controlled by the controller;
the frequency converter is provided with the encoder, and the encoder determines the rotating speed of the motor according to the displacement of the home elevator from the current floor to the target floor determined by the controller and the corresponding relation between the prestored elevator displacement and the rotating speed of the motor, and sends the rotating speed to the motor through the frequency converter.
2. Home elevator according to claim 1,
and the frequency converter is connected with the encoder through a PG card.
3. The home elevator according to claim 1, characterized in that the circuit further comprises: a first relay and a second relay;
the first relay and the second relay are respectively connected with a second motor control interface and a third motor control interface of the frequency converter;
the controller controls the household elevator to ascend through the first relay, and the controller controls the household elevator to descend through the second relay.
4. Home elevator according to claim 3,
and the frequency converter is also connected with an interlocking circuit of the first relay and the second relay.
5. The home elevator according to claim 1, characterized in that the circuit further comprises: a brake resistor;
the brake relay is connected with the controller, and emergency braking is realized according to the instruction of the controller;
the brake resistor is used for cooperating with the brake relay to execute emergency braking.
6. Home elevator according to claim 1,
the elevator further comprises: an overweight detection device;
the overweight detection device comprises: the middle section of the fixed beam is hinged with the top of the lift car;
the two reversing pulleys are respectively arranged at two ends of the fixed beam;
the lifting piece is connected with the fixed beam and comprises a reel with a rope groove and a cable wound on the reel, the reel is arranged between the two reversing pulleys and is offset from the midpoint of the connecting line of the two reversing pulleys, the cable is rotated by the two reversing pulleys to extend backwards and upwards, and the lengths of the cables on the two sides of the reel are different;
one end of the motor is connected with the reel, and the other end of the motor extends to the end part of the fixed beam far away from the reel and forms an indicating end; the motor is connected with the fixed beam through the connecting seat;
the displacement monitoring piece is used for monitoring the displacement of the indicating end and is electrically connected with the controller.
7. Home elevator according to claim 6,
the displacement monitoring piece comprises a contact switch, the contact switch is arranged on one of the indicating end or the car, a triggering part is arranged on the other one of the indicating end or the car, and when the displacement of the indicating end is greater than a set threshold value, the triggering part triggers the contact switch.
8. The home elevator according to claim 6, characterized in that the elevator further comprises:
an elastic member connected to the rope to carry the car, the elastic member having a rated deformation amount;
a loose position switch for detecting a change in the elastic member below the rated deformation amount;
the actuating piece is connected with the elastic piece, the position of the actuating piece changes along with the deformation of the elastic piece, and the position of the actuating piece comprises a first position interval for turning on the loose position switch and a second position interval for turning off the loose position switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921414434.0U CN211056433U (en) | 2019-08-27 | 2019-08-27 | Household elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921414434.0U CN211056433U (en) | 2019-08-27 | 2019-08-27 | Household elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211056433U true CN211056433U (en) | 2020-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921414434.0U Expired - Fee Related CN211056433U (en) | 2019-08-27 | 2019-08-27 | Household elevator |
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| CN (1) | CN211056433U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110482344A (en) * | 2019-08-27 | 2019-11-22 | 山东奔速电梯股份有限公司 | A kind of home lift and its protection control method |
-
2019
- 2019-08-27 CN CN201921414434.0U patent/CN211056433U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110482344A (en) * | 2019-08-27 | 2019-11-22 | 山东奔速电梯股份有限公司 | A kind of home lift and its protection control method |
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