CN218387285U - Frequency converter and electric equipment - Google Patents

Abstract

The application relates to a converter and consumer separates the interior of the cabinet body for different function rooms, and the fixed connecting piece that is provided with between any function room and at least one adjacent function room will set up the frequency conversion function device in function room and can dismantle with the connecting piece that corresponds and be connected. Through the converter of buildding of this kind of mode, the independent modularization setting of frequency conversion function device when certain frequency conversion function device trouble appears, only need with the trouble device correspond the replacement can, need not internal layout of redesign cabinet and cabinet body structure, effectively improve the commonality of converter.

Description

Frequency converter and electric equipment

Technical Field

The application relates to the technical field of frequency conversion, in particular to a frequency converter and electric equipment.

Background

A Variable-frequency Drive (VFD) is a power control device that applies frequency conversion technology and microelectronic technology to control an ac motor by changing the frequency of a working power supply of the motor. With the development of science and technology, frequency converters are widely applied to various electric equipment such as refrigerators, air conditioners and the like, so that the operation of the various electric equipment is more energy-saving and reliable.

The conventional frequency converter is usually designed in a cabinet, and if some devices need to be changed, the internal layout and the cabinet structure need to be redesigned. Therefore, the conventional frequency converter has poor versatility.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a frequency converter and an electric device to solve the problem of poor versatility of the conventional frequency converter.

A frequency converter, comprising: the frequency conversion cabinet comprises frequency conversion functional devices, connecting pieces and a cabinet body, wherein the interior of the cabinet body is divided into a plurality of compartments, each compartment comprises a functional compartment, the connecting piece is fixedly arranged between any one functional compartment and at least one adjacent functional compartment, and two ends of each connecting piece extend into the adjacent functional compartments respectively; the frequency conversion function device is arranged in the function chamber and detachably connected with the connecting piece corresponding to the function chamber.

In one embodiment, the connecting pieces comprise an input connecting piece, an output connecting piece and an inter-device connecting piece, wherein the input connecting piece is fixedly arranged on the outer wall of one function chamber, one end of the input connecting piece extends to the outside of the cabinet body, and the other end of the input connecting piece extends to the inside of the cabinet body; one the outer wall department of function compartment is fixed to be provided with the output connecting piece, the one end of output connecting piece extends to the outside of the cabinet body, the other end of output connecting piece extends to the inside of the cabinet body, arbitrary one between function compartment and adjacent at least one fixed being provided with between the function compartment the connecting piece between the device, the both ends of connecting piece extend to adjacent respectively between the device the inside of function compartment.

In one embodiment, the chamber further comprises a monitoring chamber, and the frequency converter further comprises a monitoring device, wherein the monitoring device is arranged in the monitoring chamber.

In one embodiment, the frequency converter further comprises a flexible connector, and the frequency conversion functional device is detachably connected with the connector corresponding to the functional compartment through the flexible connector.

In one embodiment, the frequency conversion function device is in threaded connection with the connecting piece corresponding to the function chamber.

In one embodiment, the frequency conversion function device comprises at least one of a filter plate of a circuit breaker, a heat dissipation rectifier, a reactor, a power capacitor, a charging resistor of a direct current contactor and a heat dissipation inverter.

In one embodiment, the monitoring device includes a resistance voltage divider, a main control board and a monitoring device, the resistance voltage divider, the main control board and the monitoring device are respectively disposed in different monitoring compartments, the resistance voltage divider and the main control board are respectively connected to the corresponding frequency conversion functional devices, and the resistance voltage divider and the monitoring device are respectively connected to the main control board.

In one embodiment, the connecting piece comprises a first conducting strip, a second conducting strip and a third conducting strip, and the first conducting strip, the second conducting strip and the third conducting strip are arranged in parallel at intervals.

In one embodiment, the frequency converter further comprises an analog load device, the analog load device being removably connected to the output connection.

In one embodiment, the frequency converter further comprises a control interaction device, the control interaction device is arranged on the outer surface of the cabinet body, and the control interaction device is connected with the monitoring device.

In one embodiment, the connecting piece is arranged between any one of the compartments and the adjacent compartment, and two ends of the connecting piece respectively extend to the adjacent compartments.

An electric device comprises the frequency converter.

The frequency converter and the electric equipment divide the interior of the cabinet body into different functional compartments, a connecting piece is fixedly arranged between any one functional compartment and at least one adjacent functional compartment, and a frequency conversion functional device arranged in the functional compartment is detachably connected with the corresponding connecting piece. Through the converter of buildding of this kind of mode, the independent modularization setting of frequency conversion function device when certain frequency conversion function device trouble appears, only need with the trouble device correspond the replacement can, need not internal layout of redesign cabinet and cabinet body structure, effectively improve the commonality of converter.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a frequency converter in an embodiment of the present application;

FIG. 2 is a schematic diagram of a frequency converter according to another embodiment of the present application;

FIG. 3 is a schematic diagram of electrical connections of a frequency conversion function device according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a flexible connector according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a heat dissipation rectifier according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a reactor according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a power capacitor according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a DC contactor according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a heat dissipation inverter according to an embodiment of the present application;

FIG. 10 is a schematic diagram of a frequency converter according to another embodiment of the present application;

fig. 11 is a schematic structural diagram of a main control board and a monitoring device in an embodiment of the present application;

FIG. 12 is a schematic diagram of a frequency converter according to another embodiment of the present application;

fig. 13 is a schematic structural diagram of a frequency converter according to still another embodiment of the present application.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Referring to fig. 1, a frequency converter includes: the frequency conversion functional device 100, the connecting piece 300 and the cabinet body 400, wherein the interior of the cabinet body 400 is divided into a plurality of compartments, each compartment comprises a functional compartment 410, the connecting piece 300 is fixedly arranged between any one functional compartment 410 and at least one adjacent functional compartment 410, and two ends of each connecting piece 300 respectively extend into the interiors of the adjacent functional compartments 410; the frequency conversion functional device 100 is disposed in the functional compartment 410 and detachably connected to the connecting member 300 corresponding to the functional compartment 410.

Specifically, the frequency conversion functional device 100 is a device that realizes functions required by frequency conversion such as filtering, rectification, inversion and the like during frequency conversion operation, the function chamber 410 is a chamber in which the frequency conversion functional device 100 is disposed, and the connecting member 300 is a conductive device with a certain current-carrying capacity.

In the frequency converter, since the frequency conversion functional device 100 needs to convert the input large current into the large current of other frequencies, in order to meet the electrical transmission requirement of the large current, the connecting member 300 needs to be disposed between the functional chamber 410 and the functional chamber 410, and the electrical transmission is realized through the connecting member 300.

In the functional compartments 410, a connecting member 300 is fixedly disposed between any one functional compartment 410 and at least one adjacent functional compartment 410, so as to ensure that the frequency conversion functional device 100 disposed in the functional compartment 410 can realize electrical transmission with other frequency conversion functional devices 100 through the connecting member 300.

The frequency converter divides the interior of the cabinet 400 into different functional compartments 410, the inter-device connecting piece 300 is fixedly arranged between any one functional compartment 410 and at least one adjacent functional compartment 410, the frequency conversion functional device 100 arranged in the functional compartment 410 is detachably connected with the corresponding connecting piece 300, and finally the frequency converter forming the cabinet 400 structure is built. Through the converter of this kind of mode built, frequency conversion function device 100 independent modularization sets up, when certain frequency conversion function device 100 trouble appears, only need with the trouble device correspond the replacement can, need not the inside overall arrangement of redesign cabinet body 400 and cabinet body 400 structure, effectively improve the commonality of converter.

Referring to fig. 2, in one embodiment, the connection member 300 includes an input connection member 310, an output connection member 320, and an inter-device connection member 330, wherein the input connection member 310 is fixedly disposed on an outer wall of a functional compartment 410, one end of the input connection member 310 extends to the outside of the cabinet 400, and the other end of the input connection member 310 extends to the inside of the cabinet 400; an output connector 320 is fixedly arranged on the outer wall of one functional compartment 410, one end of the output connector 320 extends to the outside of the cabinet body 400, the other end of the output connector 320 extends to the inside of the cabinet body 400, an inter-device connector 330 is fixedly arranged between any one functional compartment 410 and at least one adjacent functional compartment 410, and two ends of the inter-device connector 330 respectively extend to the inside of the adjacent functional compartment 410.

In the solution of this embodiment, the connecting element 300 is divided into an input connecting element 310, an output connecting element 320 and an inter-device connecting element 330 according to different functions, the input connecting element 310 is used to connect with an external power source, so as to input power for the frequency converter, and the output connecting element 320 is used to connect with an external load, so as to drive the external load. The inter-device connectors 330 are disposed between the different functional compartments 410 for electrical transmission between the different frequency conversion functional devices 100.

In one embodiment, please refer to fig. 2, the chamber further includes a monitoring chamber 420, the frequency converter further includes a monitoring device 200, and the monitoring device 200 is disposed in the monitoring chamber 420.

Specifically, the monitoring device 200 is a device for monitoring and controlling the operation of the frequency conversion function device 100. In the frequency converter, when the monitoring device 200 monitors and controls the frequency conversion functional device 100, the voltage and current of the transmitted signal are low, and the signal transmission can be completed without a connecting piece 300 with a certain current-carrying capacity.

Therefore, in the technical scheme of the application, signal line transmission holes can be formed in the side walls of the functional chamber 410 and the monitoring chamber 420 at corresponding positions so as to be conveniently arranged in the device in the chamber, and when the device and other devices have signal transmission requirements, signal wiring is directly built between different chambers through the signal line transmission holes. It can be understood that the signal routing may be set in a manner of directly passing through different compartments, or may be set in a manner of routing from an outer wall of a compartment, and the signal routing is selected specifically in combination with an actual scene.

It is understood that the connection relationship between the monitoring device 200 and the frequency conversion function device 100 may be different according to the specific type of the monitoring device 200. For example, when the monitoring device 200 is a device for monitoring the internal environmental parameters of the cabinet of the frequency converter, the monitoring device 200 is only required to be disposed inside the cabinet, and is not required to be further connected to the frequency conversion functional device 100. When the monitoring apparatus 200 needs to monitor or control the operation status of some frequency conversion functional devices 100, the monitoring apparatus 200 needs to be connected to the corresponding frequency conversion functional device 100.

Referring to fig. 2, for ease of understanding, in a more detailed embodiment, a frequency converter topology is set up as an example for explanation. The outer wall of the first functional compartment is fixedly provided with an input connector 310 and is connected with an external power supply through the input connector 310, and the outer wall of the last functional compartment is fixedly provided with an output connector 320 and is connected with a load through the output connector 320. The functional compartments in the middle part are fixedly provided with inter-device connectors 330 on two sides, so that the frequency conversion functional devices 100 arranged in the functional compartments 410 can be sequentially connected in series between an external power source and a load to form a complete frequency converter topology structure. That is, except for two functional compartments for external power supply access and load access, only the inter-device connecting member 330 needs to be arranged between one adjacent compartment, and one inter-device connecting member 330 is arranged between the other functional compartments and two adjacent functional compartments. According to the scheme, the frequency conversion function devices 100 can be connected in series in sequence through the inter-device connecting piece 330, electric energy flows into the frequency conversion function device 100 in the first function chamber 410 from an external power supply, and flows out to a load from the frequency conversion function device 100 in the last function chamber 410, so that the frequency conversion function is realized.

It should be noted that, the specific numbers of the function compartments 410 and the monitoring compartments 420 provided in the cabinet 400 are not unique, and in an actual scene, the numbers of the function compartments 410 and the monitoring compartments 420 may also be different according to the different numbers of the frequency conversion functional devices 100 and the monitoring apparatuses 200 which construct the frequency converter, and may be specifically set differently in combination with the actual scene, which is not specifically limited herein.

Referring to fig. 3, in an embodiment, the frequency converter further includes a flexible connector 500, and the frequency conversion functional device 100 is detachably connected to the corresponding connector 300 of the functional compartment 410 through the flexible connector 500.

Specifically, the frequency conversion functional device 100 is detachably connected to the connecting member 300 corresponding to the functional compartment 410 through the flexible connecting member 500, and in an actual scene, the types of the connecting members 300 disposed on the side walls of the functional compartment 410 are different. If the functional compartment 410 is a functional compartment 410 connected to an external power source, the frequency conversion functional device 100 inside the functional compartment 410 needs to be detachably connected to the input connector 310 through the flexible connector 500 and detachably connected to the corresponding inter-device connector 330 through the flexible connector 500. If the functional compartment 410 is a functional compartment 410 connected to a load, the frequency conversion functional device 100 inside the functional compartment 410 needs to be detachably connected to the output connector 320 through the flexible connector 500 and detachably connected to the corresponding inter-device connector 330 through the flexible connector 500. In other cases, the frequency conversion functional device 100 may be detachably connected to the inter-device connecting member 330 through the flexible connecting member 500.

In the technical scheme of this application, when carrying out frequency conversion function device 100 and setting up in corresponding function room 410, carry out the mode of dismantling the connection through flexible connectors 500 and corresponding connecting piece 300, realize frequency conversion function device 100's electric transmission path and build. Therefore, the connection error between the rigid devices can be effectively made up, and the phenomenon that the mounting hole position of the frequency conversion functional device 100 is deviated in the mounting process is avoided.

It is understood that, in a more detailed embodiment, please refer to fig. 3, a connection structure 110 for connecting with a flexible connection member 500 is additionally disposed at the frequency conversion functional device 100, and the flexible connection member 500 is connected to the connection structure 110, so as to achieve the electrical connection with the frequency conversion functional device 100.

It should be noted that the particular type of flexible connector 500 is not exclusive as long as the electrical transmission requirements are met. In a more detailed embodiment, referring to fig. 4, the flexible connecting member 500 is stacked by multiple metal sheets, the metal sheets at two ends are fixed and supported, and an insulating layer is added at the outermost metal sheet to perform insulation and isolation. The specific type of foil is not exclusive and in a more detailed embodiment may be a copper foil.

It can be understood that the specific length and other dimensions of the flexible connector 500 are not unique, and different dimensions can be set specifically according to actual requirements, so as to meet the requirements of different frequency conversion functional devices 100 and facilitate the connection of different frequency conversion functional devices 100. Further, in one embodiment, to meet the requirements of different power and different working conditions, the flexible connector 500 may use a series-parallel connection mode to increase the current-carrying capacity and the length.

In another embodiment, the frequency converter may also be configured without the flexible connector 500, and the connector 300 is directly configured as the flexible connector 300, so as to avoid the hole position deviation phenomenon of the frequency conversion functional device 100 during the installation process, and improve the installation reliability of the frequency conversion functional device 100.

In one embodiment, the frequency conversion function device 100 is threadedly coupled to the corresponding connector 300 of the function compartment 410.

Specifically, the detachable connection manner between the frequency conversion functional device 100 and each of the connecting members 300 is not unique, and as long as the frequency conversion functional device 100 has a replacement requirement, the detachable connection manner and the installation manner are convenient. This scheme specifically adopts threaded connection's mode, with corresponding installation department and connecting piece 300 in the frequency conversion function device 100, through bolt and nut, realizes threaded connection.

Further, in a more detailed embodiment, a flexible connector 500 is further disposed between the connecting member 300 and the frequency conversion functional device 100, and accordingly, the detachable connection between the frequency conversion functional device 100 and the connecting member 300 is also implemented by the flexible connector 500. Firstly, the flexible connector 500 can be connected to the frequency conversion functional device 100, and at this time, the flexible connector can be fixedly connected or detachably connected; and then the flexible connector 500 is detachably connected with the connector 300, so that the detachable connection between the frequency conversion functional device 100 and the connector 300 can be completed.

It should be noted that the number of frequency conversion function devices 100 required for implementing the frequency conversion function in the frequency converter is not exclusive, and the frequency conversion function devices 100 may be different according to the specific type of the frequency converter and the combination arrangement between different devices. For example, in one embodiment, the frequency conversion function 100 includes at least one of a filter plate of a circuit breaker, a heat dissipation rectifier, a reactor, a power capacitor, a charging resistor of a dc contactor, and a heat dissipation inverter.

Specifically, the filter plate of the circuit breaker is a functional device formed by integrating a circuit device and a filter, and has overcurrent protection and filtering functions; the heat dissipation rectifier is a rectifier carrying a radiator; the charging resistor of the direct current contactor is a functional device formed by integrating the direct current contactor and the charging resistor; the heat radiation inverter is an inverter with a radiator.

In an embodiment, please refer to fig. 5, wherein 122 is a refrigerant pipeline, 123 is a heat dissipation plate (specifically, a heat dissipation aluminum plate), the heat dissipation rectifier adopts a heat sink to assemble the power diode power module 121, a plurality of fixing holes are added on the surface of the heat sink, and each pipeline can be selectively connected in parallel through a plurality of power modules. For example, two power modules per phase connection are used in parallel, increasing the motor diode capacity. Further, in another embodiment, the diode power module 121 may be replaced by an IGBT (Insulated Gate Bipolar Transistor) power module, a fixing hole of the IGBT power module is synchronously reserved, and the diode power module is electrically connected to the connecting member 300 by a flexible connection.

Reactor as shown in fig. 6, in one embodiment, the reactor is connected to the connection member 300 by a flexible connection member 500. Referring to fig. 7, the power capacitor is fixed by combining a capacitor 131 and a laminated busbar 132, the laminated busbar 132 is formed by positive and negative two planar copper plates, and the insulating layer is used for insulating, and a plurality of positive and negative pairs of fixing holes 133 are reserved in the whole plane, so that the number of capacitors 131 is selected. And designing corresponding laminated busbar 132 connection aiming at the capacitors 131 with different electrode gap distances.

The dc contactor is shown in fig. 8, and in one embodiment, the dc contactor and the charging resistor are arranged in parallel. Referring to fig. 9, on the heat sink of the heat dissipation inverter, wherein 143 is a refrigerant pipeline, two rows of a plurality of fixing hole locations 142 are designed, and as with the design scheme of the heat dissipation rectifier, the heat sink is designed independently, and only the number of the IGBT inverter modules 141 in the inverter and the parallel connection scheme can be implemented by adding the fixing hole locations.

Further, in a more detailed embodiment, referring to fig. 10, the frequency conversion device 100 includes a filter plate of a circuit breaker, a heat dissipation rectifier, a reactor, a power capacitor, a charging resistor of a dc contactor, and a heat dissipation inverter. The rectifier is independently designed with a radiator, the diode rectifier module or the IGBT controllable rectifier module is assembled in the radiator, and the rectifier with the radiator is independently designed with the frequency conversion functional device 100. One end of the filter plate of the circuit breaker is connected to the input connector 310 through the flexible connector 500, and the other end of the filter plate of the circuit breaker is connected to the inter-device connector 330 between the functional chamber 410 and the functional chamber 410 where the heat dissipation rectifier is located through the flexible connector 500. The connection between the frequency converter functional devices is performed in sequence, and finally the heat dissipation inverter is connected to the output connector 320 through the soft connector 500 to form a complete electrical connection loop.

Further, in one embodiment, the reactor is selectively connected in series to the connection member 330 between the heat dissipation rectifier and the dc contactor charging resistor on the same side, i.e. on the positive side, and the other side of the reactor is directly connected to the heat dissipation rectifier and the negative side of the dc contactor charging resistor through the soft connection member 500, so as to form a closed loop. The charging resistor of the dc contactor is directly connected to the inside thereof through the flexible connector 500, and the outside thereof is connected in series to the inter-device connector 330, i.e., the negative electrode side, outside the reactor and the power capacitor. The positive side of the power capacitor is connected to the left inter-device connection 330 (i.e., the inter-device connection 330 between the functional compartments 410 where the reactor is located and the functional compartments 410 where the power capacitor is located), and the output is connected to the positive side of the heat dissipation inverter.

Through the scheme, the filter plate of the circuit breaker, the heat dissipation rectifier, the reactor, the power capacitor, the charging resistor of the direct current contactor and the heat dissipation inverter are connected into the corresponding functional compartment 410 in a detachable connection mode, and when any device needs to be replaced, the device only needs to be detached, and the setting and the layout of other frequency conversion functional devices 100 are not affected.

The specific type of the monitoring apparatus 200 is not unique, and in one embodiment, referring to fig. 10, the monitoring apparatus 200 includes a resistor sub-pressing plate, a main control plate and a monitoring device, the resistor sub-pressing plate, the main control plate and the monitoring device are respectively disposed in different monitoring rooms, the resistor sub-pressing plate and the main control plate are respectively connected to the corresponding frequency conversion functional device 100, and the resistor sub-pressing plate and the monitoring device are respectively connected to the main control plate.

Specifically, the resistance voltage divider is a device for collecting voltage through resistance voltage division; the main control board is a device for controlling the operation of each frequency conversion function device 100, and the monitoring device can communicate with the main control board in real time to output the information related to the operation state of the frequency converter, so as to realize the operation monitoring of the frequency converter.

The monitoring device has a comprehensive information acquisition function and comprises at least one of a voltage monitoring module, a current monitoring module, an infrared monitoring module, an air pressure monitoring module, a temperature monitoring module, a humidity monitoring module, an electromagnetic monitoring module, a camera monitoring module, a photoelectric monitoring module and a power supply monitoring module. Specifically, the selection is performed in combination with the actual requirement, and a monitoring device for implementing the corresponding monitoring function is mounted in the frequency converter, and in a more detailed embodiment, please refer to fig. 11, the monitoring device includes all the detection monitoring modules described above, and can implement all the monitoring functions described above.

The main control board is mainly used for driving a heat dissipation system of a heat dissipation rectifier, driving the rectifier to operate, driving a heat dissipation system of a heat dissipation inverter, driving the inverter to operate, and the like in the frequency converter, so that each frequency conversion functional device 100 is matched with and realizes a frequency conversion function.

In a more detailed embodiment, the resistor voltage dividing plate is connected between the cut-off filter and the heat dissipation rectifier and also connected between the reactor and the power capacitor, and is responsible for collecting input voltage, direct-current bus voltage and the like and synchronously outputting the input voltage, the direct-current bus voltage and the like to the main control board. The main control board is respectively connected to the heat dissipation rectifier, the direct current contactor charging resistor and the heat dissipation inverter, and directly controls the heat dissipation rectifier, the heat dissipation inverter, the direct current contactor and other execution devices. The main control board is communicated with the monitoring device in real time, and related information is displayed through a display screen of the monitoring device.

Further, in an embodiment, the self-checking module Processing of the program can be performed on a control port of a Central Processing Unit (CPU) chip of the main control board, because the number of chips used by a product is limited, the self-checking module Processing of the program can be performed on the CPU used, the self-checking program after being modularized is burned into the CPU chip and then can automatically enter into functional operation, high and low level Output and Input configuration of an Input Output (IO) port and acquisition configuration of an Analog Digital Interface (ADI) module port are realized in the program, and the accuracy of signal Processing of the signal acquisition circuit is verified; PWM (Pulse Width Modulation) outputs control signal configuration, sets a frequency range, sends out PWM signals by receiving communication instructions and controls the IGBT module; and the communication circuit is configured, the communication functions of the monitored control system and the motor system platform are realized through the configuration of UART, 485 communication and CAN communication, and the configuration of the minimum system is completed aiming at each CPU configuration.

Further, in one embodiment, the power-on system is a flexible self-power-on, automatic detection system that self-diagnoses the main control board power supply size. The power supply voltage automatically rises with a slope a, and when the main control panel is detected to normally open the machine, the power supply voltage is stable and is defaulted to be the normal working voltage. In the second power-on mode, a power supply voltage reference value is set, the power supply voltage automatically rises to the value with the slope of a, the power supply voltage tends to be stable, and the main control board can normally run. Through this kind of scheme, can guarantee that the power guarantees the power supply of main control board with certain elevating speed, guarantee the power supply stability of main control board.

It should be noted that the specific type of connector 300 is not exclusive and in one embodiment, the connector 300 includes a first conductive strip, a second conductive strip, and a third conductive strip, the first conductive strip, the second conductive strip, and the third conductive strip being spaced apart and juxtaposed.

Specifically, in the solution of this embodiment, three conductive sheets are arranged in parallel at intervals as the connecting member 300 for electrical connection, and when the connecting member is used as the input connecting member 310 or the output connecting member 320, two ends of the first conductive sheet, the second conductive sheet and the third conductive sheet respectively extend to the outside of the cabinet body and the inside of the cabinet body; when it is used as the inter-device connector 330, the two ends of the first conductive sheet, the second conductive sheet and the third conductive sheet extend into two adjacent chambers respectively. According to the scheme, the connection among the frequency conversion functional devices 100 can select a single-phase or three-phase structure, so that a single-phase frequency converter topological structure is built, or a three-phase frequency converter topological structure is built. Taking a single-phase frequency converter topological structure as an example, a two-way conducting strip connection mode is adopted for single phase, one conducting strip (namely any two of the first conducting strip, the second conducting strip and the third conducting strip) can be vacated, and the topological structure can be flexibly built by combining with frequency conversion functional devices 100 such as rectification, inversion and the like. If the three-phase topological structure is adopted, three conducting strips (namely the first conducting strip, the second conducting strip and the third conducting strip) are selected to realize the electrical access.

It is understood that, in other embodiments, only two conducting strips arranged in parallel at intervals may be provided for each connecting element 300, so as to implement the building of the single-phase frequency converter topology.

It should be noted that, in an embodiment, when the connector 300 is disposed on the sidewall of the compartment, an insulating bakelite or the like is further used to support and isolate the connector 300 from the sidewall of the compartment, so as to ensure a certain distance between the connector 300 and the sidewall of the compartment, and to take electrical safety measures.

In one embodiment, the frequency converter further comprises an analog load device, which is removably connected to the output connector 320.

Specifically, the analog load device is a device for simulating a load of the frequency converter, in this embodiment, a dummy load may be disposed in the frequency converter, and the output connection member 320 is connected to simulate an actual operating condition of the frequency converter, so as to simulate an operating effect of the frequency converter under different operating conditions, and to implement a verification operation of a function of the frequency converter.

It should be noted that the location of the analog load device is not exclusive and in one embodiment, it may be located in a compartment inside the cabinet 400, such as the functional compartment 410 or the monitoring compartment 420. In other embodiments, it may be disposed outside the cabinet 400, as long as the output connector 320 can be accessed to realize the load simulation.

Referring to fig. 12, in an embodiment, the frequency converter further includes a control interaction device 600, the control interaction device 600 is disposed on an outer surface of the cabinet 400, and the control interaction device 600 is connected to the monitoring device 200 (not shown).

Specifically, by controlling the interactive device 600, the user can set the relevant function parameters of the frequency converter, and meanwhile, the monitoring device 200 can feed back the real-time running state of the frequency converter to the user by controlling the interactive device 600. The connection manner between the control interaction apparatus 600 and the monitoring apparatus 200 is not exclusive, and in a more detailed embodiment, taking the example that the monitoring apparatus 200 includes a resistance sub-pressure plate, a main control board and a monitoring device, the control interaction apparatus 600 is specifically connected to the main control board of the monitoring apparatus 200.

It should be noted that the specific type of control interaction device 600 is not exclusive, and in one embodiment, the control interaction device 600 may be a touch display device.

Referring to fig. 13, in one embodiment, a connecting member 300 is disposed between any one chamber and the adjacent chamber, and two ends of the connecting member 300 extend to the adjacent chambers respectively.

Specifically, in the solution of this embodiment, a connection member 300 is provided between any one compartment (which may be a functional compartment 410 or a monitoring compartment 420) and an adjacent compartment (which may also be a functional compartment 410 or a monitoring compartment 420), and in a more detailed embodiment, an inter-device connection member 330 is specifically provided between any adjacent compartments, so that functional devices provided in the compartments can be electrically connected to devices in any adjacent compartments. According to the technical scheme, the design of the frequency converter cascade topology can be realized by combining with actual conditions, and a new frequency converter structure is built by connecting two or more frequency converter topologies in series or in parallel.

Fig. 13 shows only one frequency converter topology, where one frequency converter topology refers to a complete structure topology capable of implementing frequency conversion, and includes at least two parts of rectification and inversion, and a pole connection topology refers to a new frequency converter structure formed by connecting more than two frequency converters in a topology (which may be in series-parallel connection).

For example, in one embodiment, a frequency converter topology can be built by three frequency conversion functional devices 100 to complete the frequency conversion function, and then two groups of frequency conversion functional devices 100 can be assembled in the manner of this embodiment to implement the cascade connection of two frequency converters.

Secondly, in an embodiment, the serial-parallel connection of the multi-path heat dissipation rectifier can be realized by the arrangement of the inter-device connecting member 330 in the above embodiment. The number of the heat dissipation rectifiers in one compartment is limited, and if a plurality of paths of heat dissipation rectifiers are required to be connected in series and in parallel, the heat dissipation rectifiers can be flexibly connected in series and in parallel by installing the heat dissipation rectifiers in adjacent compartments and connecting the heat dissipation rectifiers through the connectors 330 between the devices. The heat dissipation inverter and the heat dissipation rectifier can be connected in series and in parallel in the above manner, and are not described herein again.

An electric device comprises the frequency converter.

Specifically, as shown in the above embodiments and the accompanying drawings, the frequency conversion functional device 100 needs to convert an input large current into a large current of another frequency, and in order to meet the electrical transmission requirement of the large current, the inter-device connecting member 330 needs to be disposed between the functional chamber 410 and the functional chamber 410, and the electrical transmission is realized through the inter-device connecting member 330. When the monitoring device 200 monitors and controls the frequency conversion functional device 100, the voltage and current of the transmitted signal are low, and the signal transmission can be completed without a connecting piece 300 with a certain current-carrying capacity.

Therefore, in the technical solution of the present application, signal line transmission holes may also be correspondingly formed in the side walls of the functional compartment 410 and the monitoring compartment 420, so as to be conveniently disposed in the device in the compartment, and when there is a signal transmission demand with other devices, a signal line is directly set up between different compartments through the signal line transmission holes.

In the functional compartments 410, an inter-device connector 330 is fixedly disposed between any one functional compartment 410 and at least one adjacent functional compartment 410, so as to ensure that the frequency conversion functional device 100 disposed in the functional compartment 410 can realize electrical transmission with other frequency conversion functional devices 100 through the inter-device connector 330.

It should be noted that the specific type of the electric device is not exclusive, and any electric device may be used as long as the electric device needs to be operated by the variable frequency driving motor, for example, in a more detailed embodiment, the electric device may be a refrigerator or an air conditioner.

In the electrical equipment, the interior of the cabinet 400 is divided into different functional compartments 410, an inter-device connecting piece 300 is fixedly arranged between any one functional compartment 410 and at least one adjacent functional compartment 410, the frequency conversion functional device 100 arranged in the functional compartment 410 is detachably connected with the corresponding connecting piece 300, and finally, a frequency converter forming the cabinet 400 structure is built. Through the converter of this kind of mode built, frequency conversion function device 100 independent modularization sets up, when certain frequency conversion function device 100 trouble appears, only need with the trouble device correspond the replacement can, need not the inside overall arrangement of redesign cabinet body 400 and cabinet body 400 structure, effectively improve the commonality of converter.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A frequency converter, comprising:

a frequency conversion function device;

a connecting member;

the interior of the cabinet body is divided into a plurality of compartments, each compartment comprises a functional compartment, the connecting piece is fixedly arranged between any one functional compartment and at least one adjacent functional compartment, and two ends of each connecting piece extend into the adjacent functional compartments respectively; the frequency conversion function device is arranged in the function chamber and detachably connected with the connecting piece corresponding to the function chamber.

2. The frequency converter according to claim 1, wherein the connecting member comprises an input connecting member, an output connecting member and an inter-device connecting member, wherein the input connecting member is fixedly arranged on an outer wall of one of the functional compartments, one end of the input connecting member extends to the outside of the cabinet body, and the other end of the input connecting member extends to the inside of the cabinet body; one the outer wall department of function compartment is fixed to be provided with the output connecting piece, the one end of output connecting piece extends to the outside of the cabinet body, the other end of output connecting piece extends to the inside of the cabinet body, arbitrary one between function compartment and adjacent at least one fixed being provided with between the function compartment the connecting piece between the device, the both ends of connecting piece extend to adjacent respectively between the device the inside of function compartment.

3. The frequency converter according to claim 1, wherein the compartment further comprises a monitoring compartment, the frequency converter further comprising a monitoring device, the monitoring device being arranged in the monitoring compartment.

4. The frequency converter according to any one of claims 1-3, further comprising a flexible connector, wherein the frequency conversion functional device is detachably connected with the corresponding connector of the functional compartment through the flexible connector.

5. The frequency converter according to any one of claims 1 to 3, wherein the frequency conversion function device comprises at least one of a filter board of a circuit breaker, a heat dissipation rectifier, a reactor, a power capacitor, a charging resistor of a direct current contactor, and a heat dissipation inverter.

6. The frequency converter according to any one of claims 1-3, wherein the connector comprises a first conductive plate, a second conductive plate and a third conductive plate, and the first conductive plate, the second conductive plate and the third conductive plate are arranged in parallel at intervals.

7. The frequency converter of claim 2, further comprising an analog load device, said analog load device being removably connected to said output connection.

8. The frequency converter according to claim 3, wherein the monitoring device comprises a resistance voltage divider, a main control board and a monitoring device, the resistance voltage divider, the main control board and the monitoring device are respectively disposed in different monitoring compartments, the resistance voltage divider and the main control board are respectively connected to the corresponding frequency conversion functional devices, and the resistance voltage divider and the monitoring device are respectively connected to the main control board.

9. The frequency converter according to any one of claims 1 to 3, wherein the connecting member is disposed between any one of the compartments and the adjacent compartment, and both ends of the connecting member extend to the adjacent compartments respectively.

10. An electric consumer, characterized in that it comprises a frequency converter according to any one of claims 1-9.

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