Control system and elevator electric control cabinet

Abstract

The utility model relates to a control system and an elevator electric control cabinet. The control system comprises a frequency converter and a contactor. The frequency converter comprises a box body, a first rectifier and an inverter, the input end of the first rectifier is electrically connected to the output end of the first terminal strip, and the first input end and the first output end of the inverter are electrically connected to the first output end of the first rectifier and the input end of the third terminal strip in a one-to-one correspondence manner; the input end and the output end of the contactor are electrically connected to the second output end of the first rectifier and the second input end of the inverter in a one-to-one correspondence mode, and the input end of the second terminal strip is connected between the second input end of the inverter and the output end of the contactor in parallel. According to the utility model, the first rectifier is integrated in the frequency converter and is directly connected with the inverter, so that most relays and contactors of an electric control cabinet are omitted, a large number of cables are reduced, and scattered wiring is avoided.

Description

Technical Field

[0001] This utility model relates to the field of electrical control equipment technology, specifically to a control system and an elevator electrical control cabinet. Background Technology

[0002] Electrical control cabinets are the core electrical control units in industrial equipment, typically containing various low-voltage electrical components such as frequency converters, contactors, controllers, and transformers.

[0003] In existing technologies, frequency converters and contactors are connected by a large number of independent cables, but this presents the following problems during use:

[0004] 1. Each electronic component's input / output terminal requires separate wiring. The large number of cables and their crisscrossing can easily lead to wiring errors or short circuit risks.

[0005] 2. Troubleshooting requires checking each connection point one by one, which is time-consuming and requires highly experienced technicians;

[0006] 3. Redundant cables occupy internal space in the electrical control cabinet, affecting heat dissipation and subsequent expansion. Utility Model Content

[0007] Based on the above description, this utility model provides a control system and an elevator electrical control cabinet, which aims to solve the problem of complex wiring caused by the existing connection of frequency converters and contactors through a large number of independent cables.

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0009] Firstly, a control system includes:

[0010] A frequency converter includes a housing, a first rectifier, and an inverter. The housing has a first terminal block, a second terminal block, and a third terminal block. The input terminal of the first terminal block is used to connect to a power supply. The input terminal of the first rectifier is electrically connected to the output terminal of the first terminal block. The first input terminal and the output terminal of the inverter are electrically connected one-to-one to the first output terminal of the first rectifier and the input terminal of the third terminal block.

[0011] A contactor is disposed within the frequency converter. The input and output terminals of the contactor are electrically connected one-to-one to the second output terminal of the first rectifier and the second input terminal of the inverter. The input terminal of the second terminal block is connected in parallel between the second input terminal of the inverter and the output terminal of the contactor.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, it includes a motor terminal, the input end of which is electrically connected to the output end of the third terminal block.

[0014] Furthermore, it includes a braking resistor, the input of which is electrically connected to the output of the second terminal block.

[0015] Furthermore, it includes a controller, the input terminal of which is used to connect to the power supply, and the two control terminals of the controller are electrically connected one-to-one to the control terminal of the frequency converter and the control terminal of the contactor.

[0016] Furthermore, it includes a transformer, the input terminal of which is used to connect to the power supply, and the first output terminal of the transformer is electrically connected to the input terminal of the controller.

[0017] Furthermore, it includes a power supply, the input and output terminals of which are electrically connected one-to-one to the first output terminal of the transformer and the input terminal of the controller.

[0018] Furthermore, it includes a second rectifier, the input of which is electrically connected to the second output of the transformer.

[0019] In a second aspect, an elevator electrical control cabinet includes the control system described in the first aspect.

[0020] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0021] (1) By integrating the first rectifier into the inverter and directly connecting the first rectifier and the inverter, this utility model eliminates most of the relays and contactors in the electrical control cabinet, reduces a large number of cables, and avoids scattered wiring.

[0022] (2) In this utility model, when the power supply is supplied to the controller, the transformer reduces the supply voltage before supplying it to the controller, so as to adapt to the voltage requirements of the controller.

[0023] control system Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a circuit diagram of a control system provided in an embodiment of the present utility model;

[0026] Figure 2This is a structural schematic diagram of an elevator electrical control cabinet provided in an embodiment of this utility model;

[0027] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Frequency converter; 11. Housing; 111. First terminal block; 112. Second terminal block; 113. Third terminal block; 12. First rectifier; 13. Inverter;

[0030] 2. Contactor;

[0031] 3. Motor terminals;

[0032] 4. Braking resistor;

[0033] 5. Controller;

[0034] 6. Transformer;

[0035] 7. Power supply;

[0036] 8. Second rectifier. Detailed Implementation

[0037] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0039] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "under" or "below" of other elements or features will be oriented "over" of other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0040] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0041] Reference Figure 1 As shown, this utility model provides a technical solution: a control system including a frequency converter 1 and a contactor 2; the frequency converter 1 includes a housing 11, a first rectifier 12 and an inverter 13, the housing 11 has a first terminal block 111, a second terminal block 112 and a third terminal block 113, the input terminal of the first terminal block 111 is used to connect to a power supply, the input terminal of the first rectifier 12 is electrically connected to the output terminal of the first terminal block 111, the first input terminal and the output terminal of the inverter 13 are electrically connected one-to-one to the first output terminal of the first rectifier 12 and the input terminal of the third terminal block 113; the contactor 2 is disposed inside the housing 11, the input terminal and the output terminal of the contactor 2 are electrically connected one-to-one to the second output terminal of the first rectifier 12 and the second input terminal of the inverter 13, and the input terminal of the second terminal block 112 is connected in parallel between the second input terminal of the inverter 13 and the output terminal of the contactor 2.

[0042] In this embodiment, the controllable switching of the first rectifier 12 and the inverter 13 is achieved through contactor 2. By integrating the first rectifier 12 inside the frequency converter 1 and directly connecting the first rectifier 12 and the inverter 13, most of the relays and contactors 2 in the electrical control cabinet are eliminated, reducing a large number of cables and avoiding scattered wiring.

[0043] Reference Figure 1As shown, in some embodiments, the control system includes a motor terminal 3, the input of which is electrically connected to the output of a third terminal block 113.

[0044] For example, motor terminal 3 is used to connect the power cord of the motor.

[0045] In this embodiment, when the contactor 2 is turned on, the first rectifier 12 is directly connected to the second terminal block 112. The power supply voltage entering from the first terminal block 111 is converted by the first rectifier 12 and the inverter 13, and then the frequency-converted power supply voltage is output from the second terminal block 112 to drive the motor to run normally.

[0046] Reference Figure 1 As shown, in some embodiments, the control system includes a braking resistor 4, the input of which is electrically connected to the output of the second terminal block 112.

[0047] In this embodiment, when contactor 2 is disconnected, inverter 13 is disconnected from the first rectifier 12. Motor terminal 3, third terminal block 113, inverter 13, second terminal block 112, and braking resistor 4 can form a consumption circuit. Inverter 13 absorbs the regenerative energy generated by the motor during braking through the third terminal block 113, and then consumes the regenerative energy through braking resistor 4, thereby preventing overvoltage damage to inverter 1.

[0048] Reference Figure 1 As shown, in some embodiments, the control system includes a controller 5, the input terminal of which is used to connect to a power supply, and the two control terminals of the controller 5 are electrically connected one-to-one to the control terminal of the frequency converter 1 and the control terminal of the contactor 2.

[0049] In this embodiment, the controller 5 regulates the output frequency of the frequency converter 1 and the on / off state of the contactor 2 through internal logic. Furthermore, by directly connecting to a power supply, the controller 5 is independently powered, ensuring that it is not interfered with by other circuits, thereby improving speed regulation accuracy.

[0050] Reference Figure 1 As shown, in some embodiments, the control system includes a transformer 6, the input of which is connected to a power supply, and the first output of which is electrically connected to the input of the controller 5.

[0051] In this embodiment, when the power supply delivers the power supply voltage to the controller 5, the transformer 6 steps down the power supply voltage before delivering it to the controller 5 to match the voltage requirements of the controller 5.

[0052] Reference Figure 1As shown, in some embodiments, the control system includes a power supply 7, the input and output of which are electrically connected one-to-one to the first output of the transformer 6 and the input of the controller 5.

[0053] In this embodiment, when the transformer 6 supplies power to the controller 5, the power supply 7 further stabilizes and filters the power supply voltage. This eliminates the impact of voltage fluctuations on the controller 5 and prevents damage to the controller 5 caused by voltage fluctuations.

[0054] Reference Figure 1 As shown, in some embodiments, the control system includes a second rectifier 8, the input of which is electrically connected to the second output of the transformer 6.

[0055] For example, the output of the second rectifier 8 can be used to connect to the brake coil.

[0056] In this embodiment, the power supply voltage is first stepped down by transformer 6 to match the voltage requirements of the brake coil; then, the power supply voltage is converted from AC to DC by the second rectifier 8 to provide power supply voltage to the brake coil to drive the brake operation.

[0057] Reference Figures 2 to 3 As shown, this utility model provides a technical solution: an elevator electrical control cabinet, including the above-mentioned control system.

[0058] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A control system, characterized by, The application relates to a control system, comprising: a frequency converter (1) comprising a box body (11), a first rectifier (12) and an inverter (13), the box body (11) having a first terminal row (111), a second terminal row (112) and a third terminal row (113), an input end of the first terminal row (111) being used for accessing a power supply, an input end of the first rectifier (12) being electrically connected to an output end of the first terminal row (111), and a first input end and an output end of the inverter (13) being electrically connected to a first output end of the first rectifier (12) and an input end of the third terminal row (113) in one-to-one correspondence; a contactor (2) arranged in the frequency converter (1), an input end and an output end of the contactor (2) being electrically connected to a second output end of the first rectifier (12) and a second input end of the inverter (13) in one-to-one correspondence, and an input end of the second terminal row (112) being connected in parallel between the second input end of the inverter (13) and the output end of the contactor (2).

2. The control system of claim 1, wherein, a motor terminal (3) having an input end electrically connected to an output end of the third terminal row (113).

3. The control system of claim 1, wherein, a braking resistor (4) having an input end electrically connected to an output end of the second terminal row (112).

4. The control system of claim 1, wherein, a controller (5) having an input end used for accessing the power supply, and two control ends of the controller (5) being electrically connected to control ends of the frequency converter (1) and the contactor (2) in one-to-one correspondence.

5. The control system of claim 4, wherein, a transformer (6) having an input end used for accessing the power supply, and a first output end of the transformer (6) being electrically connected to the input end of the controller (5).

6. The control system of claim 5, wherein, a power supply (7) having an input end and an output end electrically connected to the first output end of the transformer (6) and the input end of the controller (5) in one-to-one correspondence.

7. The control system of claim 6, wherein, a second rectifier (8) having an input end electrically connected to a second output end of the transformer (6).

8. An elevator control cabinet, characterized in that the control system according to any one of claims 1-7.

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