Elevator door motor frequency converter

Abstract

The utility model discloses an elevator door motor frequency converter which comprises a control module, a user function circuit module and a driving module. The control module comprises a digital signal processor, and a memory, a keyboard circuit, an encoder signal input circuit, a drive board signal processing circuit, a relay output circuit, a first digital quantity output circuit, a first digital quantity input circuit and a plurality of interface circuits which are electrically connected with the digital signal processor respectively; the user function circuit module comprises a second digital quantity input circuit, a second digital quantity output circuit, an encoder circuit, a keyboard interface and a CAN communication circuit. The driving module comprises an insulated gate bipolar transistor, an insulated gate bipolar transistor driving circuit, a switching power supply, a lower bridge arm current detection circuit and a voltage detection circuit which are electrically connected with one another. The elevator door motor frequency converter not only has an over-current protection function and an over-voltage protection function, but also has an anti-pinch function.

Description

TECHNICAL FIELD

[0001] The utility model relates to elevator technical field, concretely relates to a kind of elevator door machine frequency converter. BACKGROUND

[0002] Elevator door machine frequency converter is a kind of controller for the control of elevator, and its efficiency is improved, running is stable, equipment life is prolonged by the unique control ability, and has been widely applied.

[0003] In the related art, elevator door machine frequency converter mainly includes circuit board, power supply, emergency switching circuit, data processing circuit, control panel, wiring terminal, frequency conversion module, drive circuit, encoding circuit and data communication circuit, etc., which realizes the stable operation of elevator by the cooperation of these corresponding devices and circuits.

[0004] Although the above-mentioned elevator door machine frequency converter can realize the stable operation of elevator, it cannot realize the anti-pinch function, overcurrent protection function and overvoltage protection function. INVENTION CONTENTS

[0005] The utility model aims at at least in a certain extent solve one of the technical problems in the related art. To this end, the purpose of the utility model is to provide an elevator door machine frequency converter with overcurrent protection function and overvoltage protection function.

[0006] The utility model provides a kind of elevator door machine frequency converter, it includes control module and respectively with the user function circuit module and drive module of the control module electricity is connected, the user function circuit module with the control module uses photo-coupler isolation;

[0007] The control module includes digital signal processor and respectively with the digital signal processor electricity is connected memory, keyboard circuit, encoder signal input circuit, drive board signal processing circuit, relay output circuit, first digital quantity output circuit, first digital quantity input circuit and multiple interface circuit;

[0008] The user function circuit module includes second digital quantity input circuit, second digital quantity output circuit, encoder circuit, keyboard interface and CAN communication circuit, the second digital quantity input circuit with the first digital quantity output circuit electricity is connected, the second digital quantity output circuit with the first digital quantity input circuit electricity is connected, the encoder circuit with the encoder signal input circuit electricity is connected, the keyboard interface with the keyboard circuit electricity is connected;

[0009] The drive module with the drive board signal processing circuit electricity is connected, and the drive module includes mutually electrically connected insulated gate bipolar transistor, insulated gate bipolar transistor drive circuit, switching power supply, lower bridge arm current detection circuit and voltage detection circuit.

[0010] Preferably, the model of the digital signal processor is TMS320F28034.

[0011] Preferably, the plurality of interface circuits at least comprise a CAN interface circuit electrically connected with the CAN communication circuit.

[0012] Preferably, the plurality of interface circuits further comprise a Bluetooth interface circuit and an RS485 interface circuit.

[0013] Preferably, the plurality of interface circuits further comprise an OTA download interface circuit and a JTAG download interface circuit.

[0014] The above scheme of the utility model has at least the following beneficial effects: by designing the lower bridge arm current detection circuit and voltage detection circuit of the drive module of the elevator door machine frequency converter, and electrically connecting the drive module with the drive board signal processing circuit of the control module, the elevator door machine frequency converter is provided with overcurrent protection function and overvoltage protection function, and simultaneously provided with anti-pinch function.

[0015] The additional aspects and advantages of the utility model will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creative labor.

[0017] Figure 1 It is the circuit schematic diagram of the elevator door machine frequency converter provided by the utility model embodiment;

[0018] Figure 2 It is the circuit schematic diagram of the control module in the elevator door machine frequency converter provided by the utility model embodiment.

[0019] Explanation of reference numerals: 1, control module; 11, digital signal processor; 12, memory; 13, keyboard circuit; 14, encoder signal input circuit; 15, drive board signal processing circuit; 16, relay output circuit; 17, first digital quantity output circuit; 18, first digital quantity input circuit; 19, CAN interface circuit; 110, Bluetooth interface circuit; 111, RS485 interface circuit; 112, OTA download interface circuit; 113, JTAG download interface circuit; 2, user function circuit module; 21, digital quantity input and output circuit; 22, encoder circuit; 23, keyboard interface; 24, CAN communication circuit; 3, drive module hole; 31, insulated gate bipolar transistor; 32, insulated gate bipolar transistor drive circuit; 33, switching power supply; 34, lower bridge arm current detection circuit; 35, voltage detection circuit.

[0020] The realization, functional features and advantages of the utility model will be further explained in combination with embodiments, with reference to the drawings. DETAILED DESCRIPTION

[0021] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation on the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms 'center', 'longitudinal', 'transverse', 'length', 'width', 'thickness', 'upper', 'lower', 'front','rear', 'left', 'right','vertical', 'horizontal', 'top', 'bottom', 'inner', 'outer', 'clockwise', 'counterclockwise', 'axial', 'circumferential', 'radial' is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0023] In addition, the terms 'first' and'second' are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with 'first' and'second' can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of'multiple' is two or more, unless otherwise explicitly specified.

[0024] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be mechanical connection, also can be electric connection, can be direct connection, also can indirectly connect through intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, can understand the concrete meaning of above-mentioned terms in the utility model according to specific circumstances.

[0025] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on the" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0026] Reference is made below Figure 1 and attached Figure 2 The utility model discloses an elevator door machine frequency converter, it includes control module 1 and respectively with control module 1 electricity connection user function circuit module 2 and drive module 3, user function circuit module 2 and control module 1 adopt photo-coupler isolation.

[0027] The control module 1 includes a digital signal processor 11 (DSP) and a memory 12 (EEPROM), a keyboard circuit 13, an encoder signal input circuit 14, a drive board signal processing circuit 15, a relay output circuit 16, a first digital output circuit 17, a first digital input circuit 18 and a plurality of interface circuits electrically connected to the digital signal processor 11.

[0028] The digital signal processor 11 is a TMS320F28034. By adopting the digital signal processor 11 with the model number TMS320F28034, the performance of the elevator door machine frequency converter can be improved.

[0029] The user function circuit module 2 comprises a second digital input circuit, a second digital output circuit, an encoder circuit 22, a keyboard interface 23 and a CAN communication circuit 24, the second digital input circuit is electrically connected with the first digital output circuit 17, the second digital output circuit is electrically connected with the first digital input circuit 18, the encoder circuit 22 is electrically connected with the encoder signal input circuit 14, and the keyboard interface 23 is electrically connected with the keyboard 13 circuit. The second digital input circuit and the second digital output circuit are collectively referred to as a digital input and output circuit 21.

[0030] The driving module 3 is electrically connected with the driving board signal processing circuit 15, and comprises an insulated gate bipolar transistor (IGBT) 31, an IGBT driving circuit 32, a switching power supply 33, a lower bridge arm current detection circuit 34 and a voltage detection circuit 35 which are electrically connected with each other.

[0031] In the embodiment, the plurality of interface circuits at least comprises a CAN interface circuit 19 which is electrically connected with the CAN communication circuit 24.

[0032] The plurality of interface circuits further comprises a Bluetooth interface circuit 110 and an RS485 interface circuit 111.

[0033] The plurality of interface circuits further comprises an OTA download interface circuit 112 and a JTAG download interface circuit 113.

[0034] By arranging the plurality of interface circuits, the connection mode between the elevator door machine frequency converter and external modules can be improved.

[0035] The working principle of the elevator door machine frequency converter in the embodiment is as follows: the opening and closing actions of the elevator door machine frequency converter need to be used in cooperation with the elevator control system, the opening signal of the elevator door machine frequency converter is connected to the output opening signal terminal of the elevator control system, the closing signal of the elevator door machine frequency converter is connected to the output closing signal terminal of the elevator control system, the door position output signal of the elevator door machine frequency converter is connected to the door position receiving input signal terminal of the elevator control system, the opening-to-position output signal of the elevator door machine frequency converter is connected to the opening-to-position receiving input signal terminal of the elevator control system, the closing-to-position output signal of the elevator door machine frequency converter is connected to the closing-to-position receiving input signal terminal of the elevator control system, the elevator door machine frequency converter performs parameter self-tuning on the motor, obtains detailed parameters of the motor, performs door width self-learning on the elevator car door and each floor door, and obtains actual width data of the elevator door.

[0036] When the elevator reaches the specified floor and completes the leveling, the elevator control system sends an opening signal, the elevator door machine frequency converter receives the opening signal, completes the opening action, then delays for a period of time, the elevator control system sends a closing signal, the elevator door machine frequency converter completes the closing action, and the elevator continues to run.

[0037] When the elevator door encounters human resistance or the door appears to "pin" when closing, the elevator door machine inverter determines that the motor is similar to the locked rotor at this time, the output current of the elevator door machine inverter rises quickly, and after reaching the threshold value set in the software, the elevator door machine inverter controls the door motor to run in the opposite direction immediately, so as to realize the anti "pin" function.

[0038] The elevator door machine inverter monitors the running current of the door motor in real time, and when the running current suddenly increases and reaches the set threshold value of the hardware current, the elevator door machine inverter immediately "alarms" and transmits the "alarm" signal to the elevator control system, and the system will notify the maintenance personnel to repair.

[0039] The embodiment designs the lower bridge arm current detection circuit 34 and the voltage detection circuit 35 in the drive module 3 of the elevator door machine inverter, and makes the drive module 3 electrically connected with the drive board signal processing circuit 15 of the control module 1, so that the elevator door machine inverter has the overcurrent protection function and the overvoltage protection function, and also has the anti-pinch function, greatly increasing the safety of the elevator door machine operation; in addition, a variety of operation curves can be provided, and the curve can be freely adjusted, so that the operation of the elevator door machine inverter is more stable.

[0040] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the characteristics of the different embodiments or examples without contradiction.

[0041] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and drawing contents, or direct / indirect application in other related technical fields under the utility model concept of the utility model is included in the patent protection range of the utility model.

Claims

1. An elevator door machine frequency converter, characterized in that, The elevator door machine frequency converter comprises a control module, a user function circuit module and a driving module which are electrically connected with the control module respectively, and the user function circuit module is isolated from the control module by using an optical coupler; The control module comprises a digital signal processor and a memory, a keyboard circuit, an encoder signal input circuit, a driving board signal processing circuit, a relay output circuit, a first digital quantity output circuit, a first digital quantity input circuit and a plurality of interface circuits which are electrically connected with the digital signal processor respectively; The user function circuit module comprises a second digital quantity input circuit, a second digital quantity output circuit, an encoder circuit, a keyboard interface and a CAN communication circuit, the second digital quantity input circuit is electrically connected with the first digital quantity output circuit, the second digital quantity output circuit is electrically connected with the first digital quantity input circuit, the encoder circuit is electrically connected with the encoder signal input circuit, and the keyboard interface is electrically connected with the keyboard circuit; The driving module is electrically connected with the driving board signal processing circuit, and the driving module comprises an insulated gate bipolar transistor, an insulated gate bipolar transistor driving circuit, a switching power supply, a lower bridge arm current detection circuit and a voltage detection circuit which are electrically connected with each other.

2. The elevator machine variable frequency drive of claim 1, wherein, The model of the digital signal processor is TMS320F28034.

3. The elevator machine variable frequency drive of claim 1, wherein, The plurality of interface circuits at least comprises a CAN interface circuit which is electrically connected with the CAN communication circuit.

4. The elevator machine variable frequency drive of claim 3, wherein, The plurality of interface circuits further comprises a Bluetooth interface circuit and an RS485 interface circuit.

5. The elevator machine variable frequency drive of claim 4, wherein, The plurality of interface circuits further comprises an OTA download interface circuit and a JTAG download interface circuit.

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