Two-quadrant controllable rectification explosion-proof frequency conversion integrated motor

Abstract

The utility model discloses a two-quadrant controllable rectification explosion-proof frequency conversion integrated motor which comprises an explosion-proof motor, an explosion-proof frequency converter and an input filter. The explosion-proof frequency converter is connected with an AC input cable port and a control signal port of the explosion-proof motor through wires. The explosion-proof frequency converter comprises an explosion-proof shell, and a water-cooling radiator, a two-quadrant controllable rectification frequency converter, a four-quadrant inversion frequency converter, a frequency converter control assembly, a support film capacitor, an AC / DC laminated vulcanization bus and a DC pre-charging loop which are located in the explosion-proof shell. The input filter is connected with the explosion-proof frequency converter through a lead; and the input filter comprises an explosion-proof shell, and an input contactor, an input filter reactor and a control system power supply assembly which are positioned in the explosion-proof shell. The size of the frequency conversion all-in-one machine is greatly reduced through the integrated design, and the frequency conversion all-in-one machine can be more suitable for being used under the condition that the space of an underground coal mine excavation working face is narrow on the basis that performance is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel two quadrant controllable rectification explosion -proof frequency conversion integrated motor especially relates to a two quadrant controllable rectification explosion -proof frequency conversion integrated motor for coal mine underground explosion -proof environment ACD product series. BACKGROUND

[0002] As a frequency converter used in high-risk environments such as coal mines, the application scenarios of the explosion-proof frequency converter are very wide. The two-quadrant frequency converter can only realize the operation of the positive and negative quadrants, cannot realize speed reduction and acceleration control, and the energy cannot realize bidirectional flow. Moreover, the energy fed back by the motor cannot be sent back to the power grid, resulting in an increase in operating costs. The use of four-quadrant frequency converters has high machine manufacturing costs. For different application scenarios, it is necessary to improve the application efficiency while effectively reducing the production cost and operating cost of the product. SUMMARY

[0003] The utility model provides a two quadrant controllable rectification explosion -proof frequency conversion integrated motor, it is integrated product of frequency converter, motor, electrical control in an organic whole, integrated explosion -proof frequency converter, explosion -proof motor, explosion -proof filter, logic control etc., frequency converter and motor integrated design greatly reduce the volume of frequency conversion integrated machine, on the basis of guaranteeing performance, can more adapt to the narrow space condition of coal mine underground mining working face.

[0004] The utility model realizes the following technical scheme:

[0005] A two-quadrant controllable rectification explosion-proof frequency conversion integrated motor, comprising:

[0006] The explosion-proof motor comprises an explosion-proof motor body, an AC input cable port and a control signal port.

[0007] The explosion-proof frequency converter is connected to the AC input cable port and the control signal port of the explosion-proof motor through wires. The explosion-proof frequency converter comprises an explosion-proof housing, a water-cooled radiator, a two-quadrant controllable rectification frequency converter, a four-quadrant inverter frequency converter, a frequency converter control assembly, a support film capacitor, an AC-DC laminated vulcanized busbar and a DC pre-charge loop in the explosion-proof housing.

[0008] The input filter is connected to the explosion-proof frequency converter through wires. The input filter comprises an explosion-proof housing, an input contactor, an input filter reactor and a control system power supply assembly in the explosion-proof housing.

[0009] In some embodiments, the two-quadrant controllable rectifier frequency converter, four-quadrant inverter frequency converter, DC pre-charge circuit are fixed above the water-cooled radiator respectively; the supporting thin film capacitor and AC / DC laminated vulcanization bus constitute an integral whole, which is arranged at the side of the water-cooled radiator; the AC / DC laminated vulcanization bus realizes rectification, inversion, and electrical connection of the supporting thin film capacitor; the DC pre-charge circuit is connected across the positive terminal of the DC bus in the AC / DC laminated vulcanization bus.

[0010] In some embodiments, the two-quadrant controllable rectifier frequency converter includes three sets of diode modules and three sets of control drive board card systems.

[0011] In some embodiments, the four-quadrant inverter frequency converter includes three sets of nine IGBT power modules and matching drive board card systems.

[0012] In some embodiments, the frequency converter control assembly includes a master control board, a control power supply, a control power supply filter, a signal isolation module, a relay, a super capacitor module, and a switching power supply; the control power supply filter is electrically connected at the front end of the control power supply; the switching power supply is electrically connected at the rear end of the control power supply; and the super capacitor module is connected in parallel across the switching power supply.

[0013] In some embodiments, the input contactor and the input filter reactor are installed at the bottom of the explosion-proof shell, the input contactor controls the power supply of the main circuit of the explosion-proof frequency converter, and realizes the fast on-off of the main circuit through signal control; the input filter reactor is used to realize the input L filtering function; and the control system power supply assembly is installed on the rear wall of the explosion-proof shell.

[0014] In some embodiments, the explosion-proof frequency converter is arranged on the top surface of the explosion-proof motor, and the input filter is arranged at the side of the explosion-proof motor and connected with the bottom surface of the explosion-proof frequency converter.

[0015] In some embodiments, the top surface of the explosion-proof motor body is provided with the AC input cable port and the control signal port composed of a plurality of explosion-proof through-wall terminals.

[0016] In some embodiments, the explosion-proof motor, the explosion-proof frequency converter, and the input filter are each provided with a plurality of lifting lugs for cooperating with a lifting device.

[0017] The utility model has the advantages of:

[0018] The utility model discloses a two quadrant controllable rectification explosion -proof variable frequency integrated motor adopts two quadrant topology principle, and diode trigger controllable rectification control is realized, can be more effective four quadrant deceleration and acceleration control, energy feedback function, greatly reduced the input of power device, can effectively reduce the overall cost, simultaneously through removing two quadrant controllable rectification control drive board card system, further reduce application cost, compatible two quadrant uncontrolled diode topology principle's system application, flexible switching, guarantee system performance, adapt to a variety of application environment, can greatly reduce the overall product production cost, operating cost, improve space utilization, solve the installation, maintenance difficult problem. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are part of the utility model and are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its description are used to explain the utility model, but do not constitute improper limitation on the utility model. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained according to these drawings without creative labor for ordinary skilled in the art.

[0020] In the drawings:

[0021] Figure 1 It is a two quadrant controllable rectification explosion -proof variable frequency integrated motor schematic diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the explosion -proof motor of the utility model;

[0023] Figure 3 It is a schematic diagram of the explosion -proof frequency converter of the utility model;

[0024] Figure 4 It is a schematic diagram of the input filter of the utility model;

[0025] Figure 5 It is a schematic diagram of the frequency converter control assembly of the utility model.

[0026] It should be noted that these drawings and text description do not aim at limiting the concept range of the utility model in any way, but explain the concept of the utility model to the skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model embodiment more clear, the technical scheme in the embodiment will be clearly and completely described below by combining with the drawings in the utility model embodiment, and the following embodiments are used to explain the utility model, but not to limit the range of the utility model.

[0028] In the description of the utility model, it needs to explain, the term "upper", "lower", "front", "back", "left", "right", "vertical", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element must have a specific orientation, with a specific orientation structure and operation, therefore cannot be understood as the limitation of the utility model.

[0029] In the description of the utility model, it needs to explain, unless otherwise explicitly provided and limited, the term "installation", "connection", "connect" should be broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected;Can be mechanical connection, can be electrical connection;Can be directly connected, can be indirectly connected through the intermediate medium.

[0030] As Figure 1 The utility model provides a kind of two quadrant controllable rectification explosion-proof variable frequency integrated motor, including explosion-proof motor 1, explosion-proof frequency converter 2, input filter 3;Explosion-proof motor 1 includes explosion-proof motor body, AC input cable port 11, control signal port 12;Explosion-proof frequency converter 2 includes water-cooled radiator 201, two quadrant controllable rectification frequency converter 202, four quadrant inverter frequency converter 203, frequency converter control assembly 204, support film capacitor 205, AC-DC laminated vulcanization bus 206, DC pre-charge loop 207, explosion-proof housing 208;Input filter 3 includes input contactor 301, input filter reactor 302, control system power supply component 303, explosion-proof housing 304.

[0031] Further scheme, explosion-proof frequency converter 2 is arranged on the top surface of explosion-proof motor 1, input filter 3 is arranged at the side of explosion-proof motor 1, and is connected with the bottom surface of explosion-proof frequency converter 2.

[0032] Further scheme, the shell of explosion-proof motor 1, explosion-proof frequency converter 2 and input filter 3 is equipped with multiple lifting lugs for cooperating hoisting device.

[0033] Further scheme, explosion-proof motor 1, explosion-proof frequency converter 2 and input filter 3 are respectively designed with explosion-proof structure between each other, and power, control line connection is realized through explosion-proof through-wall terminal, can effectively reduce electromagnetic signal interference in different functional intervals.

[0034] The structure of the above-mentioned explosion-proof frequency converter is further described below.

[0035] The explosion-proof frequency converter 2 comprises a water-cooled radiator 201, a two-quadrant controllable rectifier frequency converter 202, a four-quadrant inverter frequency converter 203, a frequency converter control assembly 204, a supporting thin film capacitor 205, an AC-DC laminated vulcanization bus 206, a DC pre-charging circuit 207, and an explosion-proof shell 208. The two-quadrant controllable rectifier frequency converter 202 comprises three groups of diode modules and three groups of control drive board card systems, the control drive board card systems are fixed above the two-quadrant controllable rectifier frequency converter 202, and a controllable diode rectifier frequency converter system is realized. If an application scenario in which diode start control is not required is encountered, the three groups of control drive board card systems can be removed, and the product cost is further reduced. The four-quadrant inverter frequency converter 203 comprises three groups of nine IGBT power modules and a matching drive board card system, and a standard three-level four-quadrant topology principle frequency converter is used. The two-quadrant controllable rectifier frequency converter 202, the four-quadrant inverter frequency converter 203, and the DC pre-charging circuit 207 are respectively fixed above the water-cooled radiator 201, and are fixed at the bottom position of the explosion-proof shell 208 after being assembled, serving as the basic core of the frequency converter. The supporting thin film capacitor 205 and the AC-DC laminated vulcanization bus 206 are integrated and fixed in a groove at the side of the water-cooled radiator 201, meeting the basic explosion-proof performance. The groove is expanded to utilize the internal space, meet the capacitor group installation, the AC-DC laminated vulcanization bus 206 realizes rectification, inversion, and electrical connection of the supporting thin film capacitor 205, and forms a complete two-quadrant controllable rectifier explosion-proof frequency converter. The frequency converter control assembly 204 comprises a main control board 2041, a control power supply 2046, a control power supply filter 2045, a signal isolation module 2043, a relay 2042, a super capacitor module 2044, and a switching power supply 2047, and provides a stable and reliable control system for the frequency converter system. The DC pre-charging circuit 207 is connected across the positive end of the DC bus, and provides a start-up pre-charging for the frequency converter system. The control power supply filter 2045 is electrically connected in front of the control power supply 2046, reducing system interference. The switching power supply 2047 is used for providing power supply for the IGBT drive board, the main control board 2041, and the like, and is electrically connected at the rear end of the control power supply 2046. The super capacitor module 2044 is connected in parallel across the switching power supply 2047, providing power-off buffering and data storage for the system. The signal isolation module 2043 is used for isolating external signals by means of an intrinsically safe control circuit.

[0036] The structure of the explosion-proof frequency converter is further described below.

[0037] The input filter 3 comprises an input contactor 301, an input filter reactor 302, a control system power supply component 303, and an explosion-proof shell 304.

[0038] In conclusion, the utility model discloses a two-quadrant controllable rectification explosion -proof frequency conversion integrated motor adopts two-quadrant topology principle, and diode trigger is controlled to realize rectification control, can be relatively effective four-quadrant deceleration and acceleration control, energy feedback function, greatly reduces the input of power device, can effectively reduce the overall cost, simultaneously further reduces application cost through the removal two-quadrant controllable rectification control drive board card system, compatible two-quadrant uncontrolled diode topology principle's system application, flexible switching, guarantee system performance, adapt to multiple application environments, can greatly reduce the overall product production cost, operating cost, improve space utilization, solve the installation, maintenance difficult problem.

[0039] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail in order not to obscure the understanding of the present specification.

[0040] In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments rather than other features, combinations of features of different embodiments also mean within the protection scope of the utility model and form different embodiments. For example, in the above embodiments, those skilled in the art can use in a combined manner according to the known technical solutions and the technical problems to be solved by the present application.

[0041] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, although the utility model has been disclosed as above, however, it is not used to limit the utility model, any skilled person in the art can make some changes or modifications for equivalent embodiments with the above prompt technical content without departing from the technical scheme range of the utility model, as long as it does not depart from the technical scheme of the utility model, according to the technical essence of the utility model, any simple modification, equivalent change and modification of the above embodiment, still belongs to the range of the utility model scheme.

Claims

1. A two-quadrant controllable rectification explosion-proof variable frequency integrated motor, characterized in that, The application relates to an explosion-proof motor and an explosion-proof frequency converter. The explosion-proof motor comprises an explosion-proof motor body, an alternating-current input cable port and a control signal port. The explosion-proof frequency converter is connected with the alternating-current input cable port and the control signal port of the explosion-proof motor through wires, and comprises an explosion-proof shell, a water-cooled radiator, a two-quadrant controllable rectifier frequency converter, a four-quadrant inverter frequency converter, a frequency converter control assembly, a supporting thin-film capacitor, an alternating-current and direct-current laminated vulcanization bus and a direct-current pre-charging loop. The two-quadrant controllable rectifier frequency converter, the four-quadrant inverter frequency converter and the direct-current pre-charging loop are respectively fixed above the water-cooled radiator.

2. The two-quadrant controllable rectifier explosion-proof variable frequency integrated motor of claim 1, characterized in that: The supporting thin-film capacitor and the alternating-current and direct-current laminated vulcanization bus are integrated and arranged at the side of the water-cooled radiator. The alternating-current and direct-current laminated vulcanization bus realizes rectification, inversion and electrical connection of the supporting thin-film capacitor.

3. The two-quadrant controllable rectifier explosion-proof variable frequency integrated motor of claim 1, characterized in that: The two-quadrant controllable rectifier frequency converter comprises three groups of diode modules and three groups of control driving board card systems.

4. The two-quadrant controllable rectifier explosion-proof variable frequency integrated motor of claim 1, characterized in that: The four-quadrant inverter frequency converter comprises three groups of nine IGBT power modules and matched driving board card systems.

5. The two-quadrant controllable rectifier explosion-proof variable frequency integrated motor of claim 1, characterized in that: The frequency converter control assembly comprises a main control board, a control power supply, a control power supply filter, a signal isolation module, a relay, a super capacitor module and a switching power supply.

6. The two-quadrant controllable rectifier explosion-proof variable frequency integrated motor of claim 1, characterized in that: The control power supply filter is electrically connected in front of the control power supply.

7. The two-quadrant controllable rectifier explosion-proof variable frequency integrated motor of claim 1, characterized in that: The switching power supply is electrically connected in rear of the control power supply.

8. The two-quadrant controllable rectifier explosion-proof variable frequency integrated motor of claim 1, characterized in that: The super capacitor module is connected in parallel across the switching power supply.

9. The two-quadrant controllable rectifier explosion-proof variable frequency integrated motor of claim 1, wherein: The input contactor and the input filter reactor are installed at the bottom of the explosion-proof shell. The input contactor controls the power supply of the main circuit of the explosion-proof frequency converter and realizes the fast on-off of the main circuit through signal control. The input filter reactor is used for realizing the input L filtering function. The control system power supply assembly is installed on the rear wall of the explosion-proof shell. The explosion-proof frequency converter is arranged on the top surface of the explosion-proof motor. The top surface of the explosion-proof motor body is provided with the alternating-current input cable port and the control signal port which are composed of a plurality of explosion-proof wall-penetrating terminals. The explosion-proof motor, the explosion-proof frequency converter and the input filter are all provided with a plurality of lifting lugs for matching the lifting device.

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