A new type of elevator door control system

Abstract

The present invention proposes a new type of elevator door control system, including: a machine room host computer and a motor frequency converter integrated machine; wherein, the machine room host computer is provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; the motor frequency converter integrated machine includes: a motor and a frequency converter; the frequency converter is connected to the motor; the frequency converter is also provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; the machine room host computer realizes the connection between each port and the port with the same name on the frequency converter through the elevator car trailing cable; a receiving groove is arranged at the bottom of the motor, and the frequency converter is arranged in the receiving groove; the motor is a 24V permanent magnet synchronous motor. This solution adopts an integrated solution of the motor and the frequency converter, uses a low-voltage motor of 24V, reduces the creepage distance, eliminates the rectification link in the traditional solution, directly uses 24V power supply, removes many cables in the traditional solution, saves the harness cost, simplifies the on-site wiring, is easier to use, and increases the reliability at the same time.

Description

Technical Field

[0001] The present invention relates to the field of elevator control devices, and particularly to a novel elevator door control system. Background Art

[0002] In the traditional door machine control system, it consists of two parts: the elevator machine room and the elevator car top. The two are electrically connected through a trailing cable. The elevator machine room is equipped with a distribution box and an elevator system control host; the elevator car top includes an elevator car top communication board, a dedicated frequency converter for the elevator door machine, and an AC220V series motor. The trailing cable includes a "mains L wire", a "mains N wire", and a communication protocol cable. Among them, the "mains L wire" and the "mains N wire" supply power to the "dedicated frequency converter for the elevator door machine", and the communication protocol cable is responsible for transmitting the communication protocol between the "upper computer in the machine room" and the "elevator car top communication board".

[0003] The elevator car top communication board receives the door opening and closing commands from the upper computer in the machine room, and sends "door opening command" and "door closing command" signals to the dedicated frequency converter for the elevator door machine through the output terminals integrated inside itself. At the same time, it receives "door opened in place" and "door closed in place" signals through the input terminals integrated inside itself, and then sends "door opened in place" and "door closed in place" messages to the upper computer in the machine room through the CANBUS protocol.

[0004] The dedicated frequency converter for the elevator door machine collects the "door opening command" and "door closing command" through the input terminals integrated inside itself. According to the commands issued by the "elevator car top communication board", it controls the forward and reverse rotation of the motor to realize the opening and closing of the elevator car door, and then feeds back "door opened in place" and "door closed in place" messages to the "elevator car top communication board" through the output terminals integrated inside itself. The "dedicated frequency converter for the elevator door machine" and the "AC220V series motor" are connected by two wire harnesses: a "U, V, W three-phase motor wire" and a "motor coding wire harness" to control the forward and reverse rotation of the motor and collect the position information of the motor rotor and the elevator door.

[0005] In the traditional solution, a hardware topology structure of AC-DC-AC is adopted, and the motor used is a high-voltage motor with a voltage of 220V. This requires a relatively large voltage support as a whole, and the safety factor is relatively low. Moreover, due to the high voltage, more cables are needed, resulting in cumbersome wiring during specific installation, insufficient reliability, and a relatively large number of devices involved, further increasing the cost. Summary of the Invention

[0006] In view of the defects in the prior art, the present invention proposes a new elevator door control system. Through an integrated solution of a motor frequency converter, a low-voltage motor of 24V is adopted, which reduces the creepage distance and eliminates the rectification link in the traditional solution. It directly uses 24V power supply. In the trailing cable, two wires, namely the "mains L wire" and the "mains N wire", can be omitted. As a result, the cable is safer and more reliable, and many cables in the traditional solution are removed, saving the harness cost, simplifying the on-site wiring, making it easier to use, and increasing the reliability at the same time.

[0007] Specifically, the present invention proposes the following specific embodiments:

[0008] An embodiment of the present invention proposes a new elevator door control system, including: a machine room upper computer and a motor frequency converter integrated machine; wherein, the machine room upper computer is provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port;

[0009] The motor frequency converter integrated machine includes: a motor and a frequency converter; the frequency converter is connected to the motor;

[0010] The frequency converter is also provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; the machine room upper computer realizes the connection between each port and the port with the same name on the frequency converter through the elevator car trailing cable;

[0011] A receiving groove is provided at the bottom of the motor, and the frequency converter is arranged in the receiving groove; the motor is a 24V permanent magnet synchronous motor.

[0012] In a specific embodiment, the frequency converter includes: a control chip and a three-phase inverter bridge;

[0013] The control chip is provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port;

[0014] The +24V port on the control chip is connected to the input end of the three-phase inverter bridge;

[0015] The control chip is connected to the three-phase inverter bridge to send an inverter bridge switching signal to the three-phase inverter bridge;

[0016] The output end of the inverter bridge is connected to the motor;

[0017] A magnetic bead is arranged on the rotating shaft of the motor; a magnetoelectric conversion chip for sensing the magnetic bead is arranged on the control chip.

[0018] In a specific embodiment, the three-phase inverter bridge is composed of depletion-type MOS transistors with a low withstand voltage level.

[0019] In a specific embodiment, the three-phase inverter bridge includes: three upper-arm MOS transistors, three lower-arm MOS transistors, diodes, and capacitors; wherein, the source of the upper-arm MOS transistor is connected to the drain of the lower-arm MOS transistor and the power input terminal of the motor, and the drain of the upper-arm MOS transistor is used to connect to the negative electrode of the diode, the 24V low-voltage bus, and the positive electrode of the capacitor,

[0020] The gates of the three upper-arm MOS transistors are respectively connected to the ports on the control chip for sending three-phase switch control signals of the upper arm;

[0021] The gates of the three lower-arm MOS transistors are respectively connected to the ports on the control chip for sending three-phase switch control signals of the lower arm;

[0022] The sources of the three lower-arm MOS transistors are connected to the negative electrode of the capacitor.

[0023] In a specific embodiment, the structures of the upper-arm MOS transistor and the lower-arm MOS transistor are the same.

[0024] In a specific embodiment, the capacitor is an electrolytic capacitor.

[0025] In a specific embodiment, the receiving groove is cylindrical; it further includes: a circular cover plate; wherein, the circular cover plate and the receiving groove form a sealed receiving space.

[0026] In a specific embodiment, a plurality of screw holes are further provided at the bottom of the receiving groove; the frequency converter is plate-shaped, and the frequency converter is provided with a plurality of connection holes;

[0027] The frequency converter is connected to the receiving groove by screwing the screws through the connection holes and then connecting to the screw holes.

[0028] In a specific embodiment, a sealing rubber ring is further provided on the circular cover plate.

[0029] In a specific embodiment, the +24V port, CANBUS+ port, CANBUS- port, and +24V common port provided on the frequency converter are female terminal blocks.

[0030] Accordingly, an embodiment of the present invention provides a novel elevator door control system, including: a machine room host computer and a motor frequency converter integrated machine; wherein, the machine room host computer is provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; the motor frequency converter integrated machine includes: a motor and a frequency converter; the frequency converter is connected to the motor; the frequency converter is also provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; the machine room host computer realizes the connection between each port and the port with the same name on the frequency converter through an elevator car trailing cable; a receiving groove is arranged at the bottom of the motor, and the frequency converter is arranged in the receiving groove; the motor is a 24V permanent magnet synchronous motor. This solution adopts an integrated solution of a motor frequency converter, uses a 24V low-voltage motor, reduces the creepage distance, and eliminates the rectification link in the traditional solution. It directly uses 24V power supply. In the trailing cable, two wires, namely the "mains L wire" and the "mains N wire", can be omitted. As a result, the cable is safer and more reliable, and many cables in the traditional solution are removed, saving the harness cost, simplifying the on-site wiring, making it easier to use, and increasing the reliability at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0032] Figure 1 FIG. is a schematic structural diagram of a novel elevator door control system proposed by an embodiment of the present invention;

[0033] Figure 2 FIG. is a schematic structural diagram of a novel elevator door control system proposed by an embodiment of the present invention;

[0034] Figure 3 FIG. is a schematic structural diagram of a motor frequency converter integrated machine in a novel elevator door control system proposed by an embodiment of the present invention;

[0035] Figure 4 FIG. is a schematic structural diagram of a motor frequency converter integrated machine in a novel elevator door control system proposed by an embodiment of the present invention;

[0036] Figure 5 FIG. is a schematic structural diagram of a motor frequency converter integrated machine in a novel elevator door control system proposed by an embodiment of the present invention;

[0037] Figure 6Schematic diagram of the structure of an integrated motor and frequency converter in a new elevator door control system proposed in an embodiment of the present invention;

[0038] Figure 7 Schematic diagram of the structure of an integrated motor and frequency converter in a new elevator door control system proposed in an embodiment of the present invention.

[0039] Legend:

[0040] 21 - Motor; 211 - Receiving groove; 212 - Circular cover plate; 213 - Screw hole;

[0041] 22 - Frequency converter. Detailed implementation manners

[0042] In the following, various embodiments of the present disclosure will be described more fully. The present disclosure may have various embodiments and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present disclosure to the specific embodiments disclosed herein, but rather the present disclosure should be understood to cover all adjustments, equivalents, and / or alternative solutions falling within the spirit and scope of the various embodiments of the present disclosure.

[0043] The terms used in the various embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the various embodiments of the present disclosure. As used herein, the singular form is also intended to include the plural form unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the various embodiments of the present disclosure pertain. The terms (such as those defined in a commonly used dictionary) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or being overly formal unless clearly defined in the various embodiments of the present disclosure.

[0044] Embodiment

[0045] An embodiment of the present invention discloses a new elevator door control system, as Figure 1-7 shown, including: a machine room host computer, an integrated motor and frequency converter; wherein, the machine room host computer is provided with a +24V port, a CANBUS+ port, a CANBUS - port, and a +24V common port;

[0046] The integrated motor and frequency converter includes: a motor 21 and a frequency converter 22; the frequency converter is connected to the motor;

[0047] The frequency converter is also provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; the upper computer in the machine room realizes the connection between each port and the port with the same name on the frequency converter through the elevator car trailing cable;

[0048] A receiving groove is arranged at the bottom of the motor, and the frequency converter is arranged in the receiving groove; the motor is a 24V permanent magnet synchronous motor.

[0049] Thus, in this solution, the "motor frequency converter integrated machine" communicates directly with the "upper computer in the machine room" through the trailing cable, receives the "door opening command" and "door closing command" of the "upper computer in the machine room" through the CANBUS protocol, and at the same time sends the "door opened in place" and "door closed in place" information to the "upper computer in the machine room". Compared with the traditional solution, this solution has the following advantages:

[0050] First, the "motor frequency converter integrated machine" communicates directly with the "upper computer in the machine room", which is faster and more efficient;

[0051] Second, in the trailing cable, two wires, namely the "mains L wire" and the "mains N wire", are omitted, making the cable safer and more reliable;

[0052] Third, the cable between the "elevator car top communication board" and the "special frequency converter for elevator door machine" is removed, saving the wiring harness cost, simplifying the on-site wiring, making it easier to use, and at the same time increasing the reliability. The input and output wiring terminals between the "elevator car top communication board" and the "special frequency converter for elevator door machine" are removed.

[0053] Fourth, the "motor encoder wiring harness" in the traditional solution is removed, reducing the cost, increasing the reliability, and reducing the on-site wiring work.

[0054] Fifth, the "U, V, W three-phase motor wires" in the traditional solution are removed, reducing the cost, increasing the reliability, and reducing the on-site wiring work.

[0055] In a specific embodiment, as Figure 3 shown, the frequency converter includes: a control chip and a three-phase inverter bridge;

[0056] The control chip is provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port;

[0057] The +24V port on the control chip is connected to the input end of the three-phase inverter bridge;

[0058] The control chip is connected to the three-phase inverter bridge to send inverter bridge switching signals to the three-phase inverter bridge;

[0059] The output end of the inverter bridge is connected to the motor;

[0060] A magnetic bead is provided on the rotating shaft of the motor; a magnetoelectric conversion chip for sensing the magnetic bead is provided on the control chip.

[0061] In a specific embodiment, as Figure 3 shown, the three-phase inverter bridge is composed of depletion-type MOS transistors with a low withstand voltage level.

[0062] In a specific embodiment, as Figure 3 shown, the three-phase inverter bridge includes: three upper-arm Mos transistors (Q1, Q2, and Q3 respectively) and three lower-arm Mos transistors (Q4, Q5, and Q6 respectively), a diode (B1), and a capacitor (C1); wherein, the source of the upper-arm Mos transistor is connected to the drain of the lower-arm Mos transistor and the power input terminal of the motor, and the drain of the upper-arm Mos transistor is used to connect to the negative electrode of the diode, the 24V low-voltage bus, and the positive electrode of the capacitor respectively,

[0063] The gates of the three upper-arm Mos transistors are respectively connected to the ports on the control chip for sending three-phase switching control signals of the upper arm;

[0064] The gates of the three lower-arm Mos transistors are respectively connected to the ports on the control chip for sending three-phase switching control signals of the lower arm;

[0065] The sources of the three lower-arm Mos transistors are connected to the negative electrode of the capacitor.

[0066] In a specific embodiment, the structures of the upper-arm Mos transistor and the lower-arm Mos transistor are the same.

[0067] In a specific embodiment, the capacitor is an electrolytic capacitor.

[0068] In a specific embodiment, as Figure 4-7 shown, the receiving groove is cylindrical; it further includes: a circular cover plate; wherein, the circular cover plate and the receiving groove form a sealed receiving space.

[0069] In this way, better sealing can be achieved, and the effect of waterproofing can be achieved.

[0070] In a specific embodiment, for better fixation, a plurality of screw holes are further provided at the bottom of the receiving groove; the frequency converter is plate-shaped, and the frequency converter is provided with a plurality of connection holes;

[0071] The frequency converter is connected to the receiving groove by screws passing through the connection holes and connecting to the screw holes.

[0072] In addition, for better sealing, a sealing rubber ring is further provided on the circular cover plate.

[0073] In this way, a better sealing effect between the circular cover plate and the receiving groove can be achieved through the sealing rubber ring.

[0074] In a specific embodiment, in order to better achieve the connection, the +24V port, CANBUS+ port, CANBUS- port, and +24V common port provided on the frequency converter are female terminal connectors.

[0075] Subsequently, the power supply and data can be directly connected by using the female terminal connectors to achieve the plug-in connection method.

[0076] Therefore, the present solution has the following advantages:

[0077] First, the rectification link of the frequency converter is omitted, reducing the cost and the volume of the product;

[0078] Second, after the "magnetic beads on the motor shaft" and the "magnetoelectric conversion chip" undergo magnetoelectric conversion, they are directly sent to the "control chip" for processing through the internal wiring of the PCB board, eliminating the motor encoder lead-out wire in the traditional method;

[0079] Third, the "U, V, W" output wires of the frequency converter are connected to the "24V series low-voltage permanent magnet synchronous motor" by welding in the "frequency conversion integrated machine", eliminating the motor three-phase lead-out wire in the traditional method;

[0080] Fourth, the "motor frequency conversion integrated machine" has only one four-core "CANBUS interface", eliminating the cumbersome wiring link during installation and debugging in the traditional method, reducing the workload and the fault points;

[0081] Fifth, this product is powered by 24V human-safe voltage, which is safer compared with the traditional 220V mains power;

[0082] Sixth, due to the use of 24V power supply, the product is highly integrated, small in size, and saves installation space.

[0083] Accordingly, an embodiment of the present invention provides a novel elevator door control system, including: a machine room upper computer and a motor frequency converter integrated machine; wherein, the machine room upper computer is provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; the motor frequency converter integrated machine includes: a motor and a frequency converter; the frequency converter is connected to the motor; the frequency converter is also provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; the machine room upper computer realizes the connection between each port and the port with the same name on the frequency converter through the elevator car trailing cable; a receiving groove is provided at the bottom of the motor, and the frequency converter is arranged in the receiving groove; the motor is a 24V permanent magnet synchronous motor. This solution adopts an integrated solution of the motor and the frequency converter, uses a 24V low-voltage motor, reduces the creepage distance, and eliminates the rectification link in the traditional solution. It directly uses 24V power supply. In the trailing cable, two wires, namely the "mains L wire" and the "mains N wire", can be omitted. As a result, the cable is safer and more reliable, and many cables in the traditional solution are removed, saving the harness cost, simplifying the on-site wiring, making it easier to use, and increasing the reliability at the same time.

[0084] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the drawings are not necessarily essential for implementing the present invention.

[0085] Those skilled in the art can understand that the modules in the devices in the implementation scenario can be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or can be correspondingly changed and located in one or more devices different from this implementation scenario. The modules in the above implementation scenario can be combined into one module, or further split into multiple sub-modules.

[0086] The above serial numbers of the present invention are only for description and do not represent the advantages or disadvantages of the implementation scenarios.

[0087] The above discloses only several specific implementation scenarios of the present invention. However, the present invention is not limited thereto, and any change that can be thought of by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A new elevator door control system, characterized in that, Including: An upper computer in the machine room and a motor frequency converter integrated machine; among them, the upper computer in the machine room is provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; The motor frequency converter integrated machine includes: a motor and a frequency converter; the frequency converter is connected to the motor; The frequency converter is also provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; the upper computer in the machine room realizes the connection between each port and the port with the same name on the frequency converter through the elevator car trailing cable; A receiving groove is provided at the bottom of the motor, and the frequency converter is arranged in the receiving groove; the motor is a 24V permanent magnet synchronous motor; the "U, V, W" output wires of the frequency converter are connected to the 24V permanent magnet synchronous motor by welding.

2. The novel elevator door control system according to claim 1, characterized in that, The frequency converter includes: a control chip and a three-phase inverter bridge; The control chip is provided with a +24V port, a CANBUS+ port, a CANBUS- port, and a +24V common port; The +24V port on the control chip is connected to the input end of the three-phase inverter bridge; The control chip is connected to the three-phase inverter bridge to send an inverter bridge switching signal to the three-phase inverter bridge; The output end of the inverter bridge is connected to the motor; A magnetic bead is provided on the rotating shaft of the motor; a magnetoelectric conversion chip for sensing the magnetic bead is provided on the control chip.

3. A novel elevator door control system according to claim 2, characterized in that, The three-phase inverter bridge is composed of depletion-type MOS transistors with a low withstand voltage level.

4. A novel elevator door control system according to claim 2, characterized in that, The three-phase inverter bridge includes: three upper-arm Mos transistors, three lower-arm Mos transistors, diodes, and capacitors; among them, the source electrode of the upper-arm Mos transistor is connected to the drain electrode of the lower-arm Mos transistor and the power input end of the motor, and the drain electrode of the upper-arm Mos transistor is used to connect to the negative electrode of the diode, the 24V low-voltage bus, and the positive electrode of the capacitor respectively, The gates of the three upper-arm Mos transistors are respectively connected to the ports on the control chip for sending three-phase switching control signals of the upper arm; The gates of the three lower-arm Mos transistors are respectively connected to the ports on the control chip for sending three-phase switching control signals of the lower arm; The source electrodes of the three lower-arm Mos transistors are connected to the negative electrode of the capacitor.

5. A novel elevator door control system according to claim 4, characterized in that, The structures of the upper-arm Mos transistor and the lower-arm Mos transistor are the same.

6. The novel elevator door control system according to claim 4, characterized in that, The capacitor is an electrolytic capacitor.

7. A novel elevator door control system according to claim 1, characterized in that, The receiving groove is cylindrical; it also includes: a circular cover plate; among them, the circular cover plate and the receiving groove form a sealed receiving space.

8. A novel elevator door control system according to claim 1 or 7, characterized in that, A plurality of screw holes are further provided at the bottom of the receiving groove; the frequency converter is plate-shaped, and the frequency converter is provided with a plurality of connection holes; The frequency converter is connected to the receiving groove by screwing the screws through the connection holes and connecting them to the screw holes.

9. A novel elevator door control system according to claim 7, characterized in that, A sealing rubber ring is further provided on the circular cover plate.

10. A novel elevator door control system according to claim 7, characterized in that, The +24V port, CANBUS+ port, CANBUS- port, and +24V common port provided on the frequency converter are female terminal connectors.

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