Novel single-board bare computer frequency converter

Abstract

The utility model discloses a novel single-board bare computer frequency converter, comprising a frequency converter main body and a protection assembly arranged on the frequency converter main body, the protection assembly is also provided with a heat radiation assembly, the frequency converter main body comprises a pedestal, the pedestal is provided with a circuit board, the circuit board is provided with two MCUs, one MCU is specially used for processing motor driving, and the other MCU is specially used for processing motor driving. One MCU collects user input, digital input and analog quantity sampling, the other MCU collects user input, digital input and analog quantity sampling, and the two MCUs communicate through a capacitance isolation scheme, so that high-performance real-time control is achieved, the requirement of an embedded installation environment can be met to a certain extent, and the manufacturing cost can be well controlled. According to the novel single-board bare-computer frequency converter, the MCU used for processing motor drive and the MCU used for collecting user input, digital input and analog quantity sampling are integrated on one circuit board, so that the installation size is greatly reduced, the requirement of an embedded installation environment can be met to a certain extent, and the manufacturing cost can be well controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to a frequency converter, in particular to a novel single-board bare machine frequency converter. BACKGROUND

[0002] The single-board bare machine frequency converter refers to that all circuits of the frequency converter are packaged on the same circuit board, including the main control module, the power module and the output module, and there is no independent connecting line between these modules. This design makes the internal structure of the frequency converter compact, reduces the connection between the modules, and reduces the complexity and cost of the system.

[0003] The frequency converter is generally designed to separate high and low voltages, and the control board and the drive board are designed respectively, which can reduce the interference of the high-voltage circuit on the control circuit to a certain extent. When a fault occurs, only the drive board needs to be repaired, so as to save the after-sales cost. However, this type of frequency converter is often large in size, and cannot meet the application in some embedded installation occasions. With the iteration of technology, the control chip is no longer so expensive, and the advanced anti-interference design concept makes the board with high and low voltages coexisting can also obtain excellent performance. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a novel single-board bare machine frequency converter, which integrates the MCU for processing motor drive and the MCU for collecting user input, digital input and analog quantity sampling on one circuit board, so as to greatly reduce the installation volume, realize the coexistence of high and low voltages, realize communication between the two MCUs through the container isolation scheme, achieve high-performance real-time control, solve the demand of embedded installation environment to a certain extent, and well control the manufacturing cost.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: A novel single board bare machine frequency converter, including frequency converter main part and setting on the frequency converter main part protection assembly, protection assembly still is provided with heat abstractor on, frequency converter main part includes base, is provided with circuit board on the base, is provided with two MCUs on the circuit board, a piece MCU is specially handled motor drive, another piece MCU gathers user input with digital input, analog quantity sampling etc, two piece MCU passes through the communication of the scheme of containing interval, reaches high performance real time control, can solve the demand of embedded installation environment to some extent, the manufacturing cost also can good control, because two MCU is integrated on a circuit board, therefore can realize high low voltage coexist, thereby reduces the installation volume, protection assembly includes protection shell, protection shell is the cavity structure that has the opening in the bottom and hollow inside, and is provided with air inlet, air outlet and arc opening on the protection shell, heat abstractor includes PLC, extension rod of setting in PLC side and temperature sensor of fixing in the bottom of extension rod, PLC and extension rod all are fixed in the cavity of protection shell, is provided with the shaft and the fan of fixing on the shaft on the end away from PLC of extension rod, the fan is connected with protection shell through the shaft, temperature sensor and fan all are electrically connected with PLC.

[0006] Preferably, copper columns are fixed at the four corners of the base, and screws are arranged on the four copper columns, and the four screws pass through the circuit board and are respectively installed in the four copper columns; so that the base and the circuit board can be fixed as a whole.

[0007] Preferably, the protection shell is fixed to the upper end surface of the base, and the circuit board is arranged in the cavity of the protection shell.

[0008] Preferably, the temperature sensor is arranged at the bottom of the cavity of the protection shell, and the temperature sensor is close to the two MCUs on the circuit board; so as to facilitate monitoring the temperature near the two MCUs, so as to facilitate the fan to work through the electric signal propagation when the temperature is high, if the distance between the two MCUs is large, two extension rods and two temperature sensors can be arranged, so that the two temperature sensors are close to the two MCUs respectively.

[0009] Preferably, a guide rod is fixed to the end away from the shaft of the fan, and the guide rod is horizontally arranged in the cavity of the protection shell.

[0010] Preferably, the guide rod is slidingly arranged in the limiting shell, the limiting shell is fixed to the inner wall of the cavity of the protection shell, and the end away from the limiting shell of the guide rod extends out of the arc-shaped opening; the limiting shell limits the sliding track of the guide rod, so that the guide rod can slide in the limiting shell, and then drives the fan to turn along the shaft, so as to change the angle of the fan, so as to adjust the position of the cold air blowing according to the different positions of the MCUs on different circuit boards, and adapt to the heat dissipation requirements of more different circuit boards.

[0011] Compared with the prior art, the utility model has the beneficial effects as follows:

[0012] 1. The utility model discloses a circuit board is integrated with MCU for processing motor drive, MCU for gathering user input and digital input and analog quantity sampling on one circuit board, therefore greatly reduces the installation volume, and can realize high and low voltage coexistence, and the communication between two MCU is through the container spacing scheme, reaches high -performance real -time control, can solve the embedded installation environment demand to a certain extent, and the manufacturing cost can be well controlled.

[0013] 2. The utility model discloses a temperature sensor is set up near two MCU on the frequency converter main part, carries out temperature real -time monitoring, when temperature reaches the high temperature threshold value of prearrangement, its transmission electric signal to PLC, and the electric signal of PLC transmission again makes the fan active operation and carries out heat dissipation, and the fan stops when temperature is lower, can support the long -time high -load stable operation of MCU and other electronic components on the circuit board. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic view of the utility model;

[0015] Figure 2 It is the schematic diagram of frequency converter main part of the utility model;

[0016] Figure 3 It is the utility model Figure 1 It is the sectional view of protection subassembly and heat dissipation subassembly in A-A direction of the utility model;

[0017] Figure 4 It is the schematic diagram of protection subassembly and heat dissipation subassembly of the utility model.

[0018] The reference signs and names in the drawing are as follows: 1, frequency converter main part;11, base;12, circuit board;13, copper column;14, screw;2, protection subassembly;21, protection shell;22, air inlet hole;23, air outlet hole;24, arc opening;3, heat dissipation subassembly;31, PLC;32, extension rod;33, temperature sensor;34, rotating shaft;35, fan;36, guide rod;37, limit shell. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the scope of the utility model.

[0020] In the description of the utility model embodiments, it is understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model embodiments and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more features. In the description of the utility model embodiments, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0021] In the utility model embodiments, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model embodiments can be understood according to the specific circumstances.

[0022] Please refer to Figure 1 The utility model provides an embodiment: a novel single board bare machine frequency converter, including frequency converter main part 1 and setting on frequency converter main part 1 protection assembly 2.

[0023] Please refer to Figure 2 Frequency converter main part 1 includes base 11, is provided with circuit board 12 on base 11, is provided with two MCUs on circuit board 12, a piece of MCU is specially handled motor drive, another piece of MCU gathers user input and digital input, analog quantity sampling etc., two pieces of MCUs are communicated through the container spacing scheme, reaches high performance real time control, can solve the demand of embedded installation environment to a certain extent, manufacturing cost can also be well controlled, since two MCUs are integrated on one circuit board 12, therefore high and low voltage can coexist, so as to reduce the installation volume, the copper column 13 is fixed in the four corners of base 11, the screw 14 is provided on the four copper columns 13, four screws 14 pass through circuit board 12 and are installed in four copper columns 13 respectively, so that base 11 and circuit board 12 can be fixed as a whole.

[0024] Please refer to Figure 3The protection assembly 2 is further provided with a heat dissipation assembly 3, and the protection assembly 2 comprises a protection shell 21 which is a cavity structure with an open bottom and an inner cavity, the protection shell 21 is fixed to the upper end surface of the base 11, the circuit board 12 is arranged in the cavity of the protection shell 21, and a plurality of air inlet holes 22 and a plurality of air outlet holes 23 are arranged on the protection shell 21, the heat dissipation assembly 3 comprises a PLC 31, an extension rod 32 arranged on one side of the PLC 31, and a temperature sensor 33 fixed to the bottom of the extension rod 32, the temperature sensor 33 is arranged at the bottom of the cavity of the protection shell 21, and the temperature sensor 33 is close to the two pieces of MCU on the circuit board 12, so as to facilitate monitoring the temperature near the two pieces of MCU, so as to drive the fan 35 to work through the electric signal transmission when the temperature is high, if the distance between the two pieces of MCU is large, two extension rods 32 and two temperature sensors 33 can be arranged, so that the two temperature sensors 33 are close to the two pieces of MCU respectively, the PLC 31 and the extension rod 32 are fixed in the cavity of the protection shell 21, a rotating shaft 34 and a fan 35 fixed to the rotating shaft 34 are arranged at the end of the extension rod 32 away from the PLC 31, the fan 35 is connected with the protection shell 21 through the rotating shaft 34, the temperature sensor 33 and the fan 35 are electrically connected with the PLC 31, the temperature sensor 33 monitors the temperature near the MCU in real time, when the temperature reaches a preset high temperature threshold (for example, 50 DEG C), it transmits an electric signal to the PLC 31, so that the PLC 31 transmits an electric signal to the fan 35, thereby actively dissipating heat, if the temperature decreases to a low temperature threshold (for example, 35 DEG C), the fan 35 stops, in the embodiment, the model of the PLC 31 is S7-200, and the model of the temperature sensor 33 is pt100, a guide rod 36 is fixed to the end of the fan 35 away from the rotating shaft 34, the guide rod 36 is horizontally arranged in the cavity of the protection shell 21, and the guide rod 36 is slidingly arranged in a limiting shell 37, the limiting shell 37 is fixed to the inner wall of the cavity of the protection shell 21.

[0025] Please refer to Figure 4 An arc-shaped opening 24 is further arranged on the protection shell 21, the end of the guide rod 36 away from the limiting shell 37 extends out of the arc-shaped opening 24, the limiting shell 37 limits the sliding track of the guide rod 36, so that the guide rod 36 can slide in the limiting shell 37, thereby driving the fan 35 to overturn along the rotating shaft 34, so as to change the angle of the fan 35, thereby adjusting the position of the cold air blowing according to the different positions of the MCU on different circuit boards 12, and adapting to the heat dissipation requirements of more different circuit boards 12.

[0026] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A new type of single-board bare machine frequency converter, comprising a frequency converter main body (1) and a protection assembly (2) arranged on the frequency converter main body (1), and a heat dissipation assembly (3) arranged on the protection assembly (2), characterized in that: The variable frequency converter body (1) includes a base (11), the base (11) is provided with a circuit board (12), the circuit board (12) is provided with two MCU, one MCU is dedicated to processing motor drive, another MCU collects user input and digital input and analog sampling, two MCU communicates through the container spacing scheme, the protection assembly (2) includes a protective shell (21), the protective shell (21) is a cavity structure with opening at the bottom and hollow inside, and the protective shell (21) is provided with an air inlet hole (22), an air outlet hole (23) and an arc-shaped opening (24), the heat dissipation assembly (3) includes a PLC (31), an extension rod (32) arranged on one side of the PLC (31) and a temperature sensor (33) fixed to the bottom of the extension rod (32), the PLC (31) and the extension rod (32) are fixed in the cavity of the protective shell (21), the extension rod (32) is provided with a rotating shaft (34) at the end away from the PLC (31) and a fan (35) fixed to the rotating shaft (34), the fan (35) is connected with the protective shell (21) through the rotating shaft (34), and the temperature sensor (33) and the fan (35) are electrically connected with the PLC (31).

2. A novel single board barebone frequency converter as claimed in claim 1, wherein: The four corners of the base (11) are fixed with copper columns (13), and the four copper columns (13) are provided with screws (14), and the four screws (14) pass through the circuit board (12) and are respectively installed in the four copper columns (13).

3. A novel single board barebone frequency converter as claimed in claim 1, wherein: The protective shell (21) is fixed to the upper end surface of the base (11), and the circuit board (12) is arranged in the cavity of the protective shell (21).

4. A novel single board barebone frequency converter as claimed in claim 1, wherein: The temperature sensor (33) is arranged at the bottom in the cavity of the protective shell (21), and the temperature sensor (33) is close to the two MCUs on the circuit board (12).

5. A novel single board barebone frequency converter as claimed in claim 1, wherein: The fan (35) is fixed with a guide rod (36) at the end away from the rotating shaft (34), and the guide rod (36) is horizontally arranged in the cavity of the protective shell (21).

6. A novel single board barebone frequency converter as claimed in claim 5, wherein: The guide rod (36) is slidingly arranged in a limiting shell (37), and the limiting shell (37) is fixed to the inner wall of the cavity of the protective shell (21), and the end of the guide rod (36) away from the limiting shell (37) extends out of the arc-shaped opening (24). The guide rod (36) is slidingly arranged in a limiting shell (37), and the limiting shell (37) is fixed to the inner wall of the cavity of the protective shell (21), and the end of the guide rod (36) away from the limiting shell (37) extends out of the arc-shaped opening (24).

Images