Radiation-resistant motor driver and design method

Abstract

The invention relates to a radiation-resistant motor driver and a design method, and a driver main body, the driver main body comprises a power module, a control panel and a main body shell, a device on the power module is a resistance-capacitance device, a shielding shell is arranged on the outer side of the control panel, the shielding shell is made of a metal tungsten material, and the power module and the control panel are arranged in the main body shell side by side; the radiator is installed on one side of the driver body, the power module extends to the outer side of the body shell from the interior of the body shell and makes contact with the radiator, and the radiator is used for conducting heat of the power module; and the cooling fan is mounted on one side, far away from the driver main body, of the radiator. The power module needing a large amount of heat dissipation is made of a high-radiation-resistant material and is placed together with the radiator, only the control panel which does not need a large amount of heat dissipation is shielded, so that the cost is reduced by adopting an original material for a part of the structure, the heat dissipation structure is placed on the outer side of the shielding body, the size of the shielding body is small, and the heat dissipation effect is good. And the overall weight is not obviously increased.

Description

Technical Field

[0001] This invention relates to the field of radiation protection technology for electronic systems, and in particular to a radiation-resistant motor driver and its design method. Background Technology

[0002] With the rapid development of the nuclear industry and the occurrence of several major nuclear accidents abroad, robots are widely recognized as the most ideal solution for nuclear safety assurance and nuclear accident emergency response. Using robots to replace workers in nuclear power plants, nuclear facilities, and radiation devices to perform nuclear emergency response, radiation monitoring, and radiation decontamination operations can reduce the radiation dose to workers and improve work efficiency. However, the application of robots in radiation scenarios is currently very limited, mainly due to limitations in their radiation resistance.

[0003] Motors are indispensable components for most robots to complete movement and various operations. As the core of motor action, the actuator contains many semiconductor components, and its radiation resistance is a key factor restricting the application of robots in strong radiation fields.

[0004] Currently, most existing motor drivers replace all components with products that have high intrinsic radiation resistance to improve the driver's radiation resistance. However, this method is costly and limited by the inability to mass-produce them. Alternatively, the conventional driver can be completely shielded to improve radiation resistance, but this method introduces a lot of unnecessary weight into the system and makes the driver's heat dissipation design extremely difficult.

[0005] The above problems urgently need to be addressed. Summary of the Invention

[0006] This invention discloses a radiation-resistant motor driver and its design method, aiming to solve the technical problems existing in the prior art.

[0007] The present invention adopts the following technical solution: On one hand, the present invention provides a radiation-resistant motor driver, comprising: a driver body including a power module, a control board, and a main body housing, wherein the devices on the power module are resistive-capacitive devices, and a shielding housing is provided on the outside of the control board, the shielding housing being made of tungsten metal, and the power module and the control board are arranged side by side inside the main body housing; a heat sink installed on one side of the driver body, wherein the power module extends from inside the main body housing to the outside of the main body housing and contacts the heat sink, the heat sink being used to conduct heat from the power module; and a cooling fan installed on the side of the heat sink away from the driver body, for dissipating heat from the heat sink.

[0008] Optionally, the shielding shell includes: a shielding shell with a cubic structure and a horizontally penetrating mounting hole in the middle, in which the control board is placed; a front cover installed on one side of the shielding shell to block the mounting hole; and a rear cover installed on the side of the shielding shell away from the front cover to block the mounting hole.

[0009] Optionally, it also includes: a wiring board disposed between the front cover and the shielding shell, the shape of the wiring board being the same as the shape of the side of the front cover facing the shielding shell, the wiring board being provided with multiple cable outlet holes; the cable outlet holes extending from the center line of the wiring board to the edge of the wiring board, connecting to the external environment, and the connection lines of the control board extending from the cable outlet holes to the outside of the shielding shell.

[0010] Optionally, the height of the mounting hole is greater than the thickness of the control plate.

[0011] Optionally, it also includes: two insulating fasteners disposed in the mounting hole, forming a U-shaped structure, with the U-shaped openings of the two insulating fasteners facing the control board, and the control board fixed in the U-shaped openings.

[0012] Optionally, the power module and the control board are placed side by side inside the main body housing, and a partition is provided inside the main body housing, with the partition placed between the power module and the control board; the partition is provided with wire grooves for wiring connections between the power module and the control board.

[0013] Optionally, the space inside the main housing for placing the control board is equal to the volume of the shielding housing; the space inside the main housing for placing the power module is larger than the volume of the power module, and the height of the space for placing the power module is greater than ten times the thickness of the power module.

[0014] Optionally, it also includes: a support frame, one end of which is mounted on the power module and located at the end of the power module near the heat sink. The support frame is fixedly mounted on the heat sink by bolts, and the height of the power module is fixed in the middle of the space where the power module is placed.

[0015] Optionally, the driver body further includes: an encapsulation cover plate disposed on one side of the main body housing and located at the end of the main body housing away from the heat sink, for sealing the main body housing.

[0016] Optionally, the encapsulation cover includes a first part and a second part, the first part corresponding to the mounting space of the power module and the second part corresponding to the mounting space of the control board; the thickness of the first part is lower than the thickness of the second part.

[0017] Optionally, it also includes: a line outlet, disposed on the first part, penetrating the encapsulation cover, for the line of the power module and the control board to be removed.

[0018] Optionally, it also includes: handle holes, provided on both sides of the main body shell and located on both sides of the mounting space of the control panel, for carrying the main body shell.

[0019] According to another aspect of the present invention, a radiation-resistant motor driver design method is also provided, comprising: determining the types of electronic components of the motor driver and the connection relationships between the electronic components based on the control functions required by the motor driver; determining the material of each electronic component and determining the radiation resistance based on the material of the electronic component; determining the partition layout of the motor driver based on the radiation resistance and the connection relationships of the electronic components; setting up a heat dissipation structure and a shielding structure for the electronic components according to the partition layout of the motor driver; and encapsulating and integrating the motor driver based on the heat dissipation structure and the shielding structure.

[0020] The technical solution adopted in this invention can achieve at least one of the following beneficial effects: In this embodiment of the invention, the driver body includes a power module, a control board, and a main housing. The devices on the power module are resistive-capacitive devices. A shielding shell made of tungsten metal is provided on the outside of the control board. The power module and the control board are placed side by side inside the main housing. A heat sink is installed on one side of the driver body. The power module extends from inside the main housing to the outside of the main housing and contacts the heat sink. The heat sink is used to conduct heat from the power module. A cooling fan is installed on the side of the heat sink away from the driver body to dissipate heat from the heat sink. This achieves the goal of using a highly radiation-resistant material for the power module, which requires a large amount of heat dissipation, and placing it together with the heat sink, while only shielding the control board, which does not require a large amount of heat dissipation. This reduces costs by using existing materials plus a shielding body for part of the structure. The heat dissipation structure is placed outside the shielding body, resulting in a smaller shielding body volume and only a slight increase in overall weight. This solves the technical problems of existing technologies where using all radiation-resistant materials is costly or where placing the heat dissipation structure inside the shielding body results in a large volume. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 This is an overall structural diagram of a radiation-resistant motor driver according to Embodiment 1 of the present invention; Figure 2 This is a split structural diagram of a radiation-resistant motor driver according to Embodiment 1 of the present invention; Figure 3 This is a structural diagram of a cooling fan in a radiation-resistant motor driver according to Embodiment 1 of the present invention; Figure 4 This is a split structural diagram of the shielding shell in a radiation-resistant motor driver according to Embodiment 1 of the present invention; Figure 5 This is a diagram showing the extension of the control board connection cable in a radiation-resistant motor driver according to Embodiment 1 of the present invention; Figure 6 This is a diagram showing the connection between the heat sink and the power module in a radiation-resistant motor driver according to Embodiment 1 of the present invention; Figure 7 This is a flowchart of a radiation-resistant motor driver design method according to Embodiment 2 of the present invention.

[0022] Explanation of reference numerals in the attached figures: 100. Driver body; 111. Body housing; 112. Encapsulation cover; 120. Shielding housing; 121. Control board; 122. Insulating fastener; 123. Shielding housing; 124. Cable routing board; 125. Front cover; 126. Rear cover; 127. Cable outlet hole; 130. Power module; 140. Support frame; 150. Partition; 160. Cable tray; 170. Cable outlet; 180. Handle hole; 200, radiator; 300, cooling fan. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a magnetic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0025] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] First, to facilitate understanding of the embodiments of the present invention, some terms or nouns involved in the present invention will be explained below: A motor driver is a power electronic device that sits between a control unit (such as a PLC, microcontroller, or industrial computer) and the motor itself. Its core function is to receive control signals and regulate the output power to precisely control the motor's starting, stopping, speed, direction, torque, and other operating states.

[0027] To address the problems existing in related technologies, this application provides a radiation-resistant motor driver and its design method.

[0028] Example 1 This embodiment provides a radiation-resistant motor driver, such as... Figure 1 and Figure 2 As shown, Figure 1 This is an overall structural diagram of a radiation-resistant motor driver according to Embodiment 1 of the present invention. Figure 2 This is an exploded structural diagram of a radiation-resistant motor driver according to Embodiment 1 of the present invention. The driver includes: The driver body 100 includes a power module 130, a control board 121, and a main housing 111. The devices on the power module 130 are resistive and capacitive devices. A shielding housing 120 made of tungsten metal is provided on the outside of the control board 121. The power module 130 and the control board 121 are placed side by side inside the main housing 111. A heat sink 200 is installed on one side of the driver body 100. The power module 130 extends from inside the main housing 111 to the outside of the main housing 111 and contacts the heat sink 200. The heat sink 200 is used to conduct heat from the power module 130. A cooling fan 300 is installed on the side of the heat sink 200 away from the driver body 100 and is used to dissipate heat from the heat sink 200.

[0029] Optional, such as Figure 1 As shown, the driver consists of three parts: a driver body 100, a heat sink 200, and a cooling fan 300. All circuit components and shielding structures of the driver are contained within the driver body 100, and the driver body 100 has interfaces for connecting the motor and the remote control communication module.

[0030] Optionally, based on the electronic component testing and screening results, all components in the driver are arranged on two circuit boards: control board 121 and power module 130. Control board 121 is located inside shielding housing 120. The components on control board 121 mainly include MCU chip, driver chip, optocoupler, power chip, operational amplifier, comparator, interface chip, etc., which have relatively low radiation resistance and require radiation hardening through shielding. Power module 130 constitutes the power circuit board of the driver. Power module 130 includes silicon carbide power transistors. Apart from the silicon carbide power transistors, the other components on power module 130 are resistive and capacitive devices with very high radiation resistance and do not require shielding hardening.

[0031] Optionally, since the electronic components on the power module 130 require a greater degree of heat dissipation, the power module 130 is attached to the heat sink 200, allowing the heat sink 200 to directly contact and transfer heat from the power module 130. Simultaneously, the cooling fan 300 blows away the heat from the heat sink 200. Figure 3 As shown, Figure 3 This is a structural diagram of a cooling fan in a radiation-resistant motor driver according to Embodiment 1 of the present invention.

[0032] Optionally, the radiation-resistant motor driver adopts a partitioned layout and localized precise shielding, which greatly reduces the ineffective weight introduced by shielding reinforcement; simply replacing the ordinary power transistors on the power module 130 with relatively readily available silicon carbide products is beneficial for heat dissipation design and ensures that the driver can be mass-produced at low cost.

[0033] In some preferred embodiments, the shielding housing 120 includes: a shielding housing 123, which has a cubic structure and a transverse through-hole in the middle for placing a control board 121; a front cover 125, which is installed on one side of the shielding housing 123 and blocks the through-hole; and a rear cover 126, which is installed on the side of the shielding housing 123 away from the front cover 125 and blocks the through-hole. Figure 4 As shown, Figure 4 This is a split structural diagram of the shielding shell in a radiation-resistant motor driver according to Embodiment 1 of the present invention.

[0034] Optionally, to minimize ineffective shielding weight, on the one hand, products with relatively good radiation resistance are selected during the screening of electronic components, and the shielding thickness is designed based on the weakest component. On the other hand, a double-sided dense layout is adopted in the design of the control board 121 to minimize the size of the control board 121. The shielding shell 120 is made of high-purity tungsten metal. Considering the processing technology, the shielding shell 120 consists of a shielding housing 123, a front cover 125, and a rear cover 126.

[0035] Optionally, the shielding shell 120 is made of high-purity tungsten metal and can withstand a total dose of 2000 Gy. 60 Co), the minimum intrinsic radiation tolerance of each electronic component in the control board 121 is approximately 400 Gy ( 60 The shielding enclosure 120 has a thickness of 20mm; the control board 121 measures 58×42×9mm, and the shielding enclosure 120 has an overall weight of approximately 7kg. The thickness of the shielding enclosure 120 can be modified according to different radiation resistance requirements, and the corresponding dimensions of the shielding enclosure 120 can also be changed.

[0036] In some preferred embodiments, the system further includes: a wiring board 124 disposed between the front cover 125 and the shielding housing 123. The shape of the wiring board 124 is the same as the shape of the side of the front cover 125 facing the shielding housing 123. The wiring board 124 has multiple cable exit holes 127. The cable exit holes 127 extend from the center line of the wiring board 124 to the edge of the wiring board 124, connecting to the external environment. The connection lines of the control board 121 extend from the cable exit holes 127 to the outside of the shielding housing 120. Figure 5 As shown, Figure 5 This is a diagram showing the extension of the control board connection cable in a radiation-resistant motor driver according to Embodiment 1 of the present invention.

[0037] Optionally, to ensure the integrity of the shielding housing 120 structure and thus guarantee the shielding effect, the number of holes drilled on the outer side of the overall shielding housing 120 is minimized. Instead, a wiring board 124 is added, with two cable exit holes 127 designed on the wiring board 124. Cables extending outward from the control board 121 are led out through the two cable exit holes 127. The wiring board 124 must also be made of high-purity tungsten metal. Figure 4 and Figure 5 The cable outlet hole 127 on the wiring board 124 needs to face the power module 130 to facilitate connection between the power module 130 and the control board 121. The cables connecting the control board 121 to the power module 130 and the communication module interface are led out from the shielded housing 120 through the cable outlet hole 127 on the wiring board 124.

[0038] In some preferred embodiments, the height of the mounting hole is greater than the thickness of the control plate 121.

[0039] Optionally, the control board 121 is placed inside the mounting hole. Although the heat dissipation requirements of the control board 121 are low, the control board 121 still needs to dissipate heat. Therefore, the space of the mounting hole is set to be large so that the control board 121 will not be attached to the side wall of the mounting hole. That is, there is space left in the mounting hole so that the control board 121 can dissipate heat into the surrounding air.

[0040] In some preferred embodiments, such as Figure 4 As shown, it also includes: two insulating fasteners 122, which are disposed in the mounting hole and have a U-shaped structure. The U-shaped openings of the two insulating fasteners 122 face the control board 121, and the control board 121 is fixed in the U-shaped opening.

[0041] Optionally, to prevent the control board 121 from shaking in the mounting hole, the control board 121 needs to be fixed and supported so that both the upper and lower surfaces of the control board 121 can dissipate heat. By setting a U-shaped insulating fastener 122 with the U-shaped notch facing the control board 121, the two ends of the control board 121 are snapped into the U-shaped notch to fix the control board 121 and raise the lower height of the control board 121.

[0042] Optionally, the height of the insulating fastener 122 is the same as the height inside the mounting hole to ensure that the insulating fastener 122 will not shake inside the mounting hole, thereby stably fixing the control board 121.

[0043] In some preferred embodiments, such as Figure 2As shown, the power module 130 and the control board 121 are placed side by side inside the main body shell 111. A partition 150 is provided inside the main body shell 111, and the partition 150 is placed between the power module 130 and the control board 121. A wire groove 160 is provided on the partition 150 for the wiring connection between the power module 130 and the control board 121.

[0044] Optionally, the main body shell 111 is the structural core of the driver body 100. It has two cavities inside. The lower cavity is a single-sided open structure, and its size is the same as that of the shield shell 120. The shield shell 120 and the control board 121 are placed inside. The upper cavity is a double-sided open structure, that is, it is open on both sides. The power module 130 can directly contact the heat sink 200 on the left side. The upper cavity is used to accommodate the power module 130.

[0045] Optionally, the two cavities are separated by a partition 150 to form two independent cavities, and a wire groove 160 is provided on the partition 150 so that the cable extending outward from the wire hole 127 can enter the upper cavity through the wire groove 160 and thus connect to the power module 130.

[0046] Optionally, the heat sink 200 is fixed to the left side of the main housing 111, and the power tube side of the power module 130 can be directly fixed to the surface of the heat sink 200 to achieve the maximum heat dissipation effect.

[0047] In some preferred embodiments, the space inside the main housing 111 for placing the control board 121 is equal in volume to the shielding housing 120; the space inside the main housing 111 for placing the power module 130 is larger than the volume of the power module 130, and the height of the space for placing the power module 130 is greater than ten times the thickness of the power module 130.

[0048] Optionally, since the power module 130 has high heat dissipation requirements, it needs to be placed in a large space to ensure that the power module 130 can dissipate heat quickly.

[0049] In some preferred embodiments, such as Figure 2 and Figure 6 As shown, Figure 6 This is a diagram showing the connection between the heat sink and the power module in a radiation-resistant motor driver according to Embodiment 1 of the present invention. It also includes: a support frame 140, one end of which is mounted on the power module 130 and located at the end of the power module 130 near the heat sink 200. The support frame 140 is fixedly mounted on the heat sink 200 by bolts, and the height of the fixed power module 130 is at the middle position of the space where the power module 130 is placed.

[0050] Optionally, the upper cavity inside the main body shell 111 has a double-sided open structure, that is, only a cavity with four inner walls that can penetrate through it. Therefore, the power module 130 can directly contact the heat sink 200. In this case, the power module 130 is fastened to the heat sink 200 with screws through the support bracket 140. The heat sink 200 has pre-drilled threaded holes, and the support bracket 140 can be fixed to the heat sink 200. At the same time, the lower end of the support bracket 140 is connected to the left side of the power module 130 to ensure that the heat sink 200 and the power module 130 are in contact. At this time, the heat generated on the power module 130 will be quickly transferred to the heat sink 200 and then blown away by the cooling fan 300 to achieve a rapid heat dissipation effect.

[0051] Optionally, the power module 130 can be raised by the support frame 140, so that the power module 130 does not contact the upper and lower cavity walls in the upper cavity, so as to achieve the effect of rapid heat dissipation from the bottom of the power module 130.

[0052] In some preferred embodiments, the driver body 100 further includes an encapsulation cover 112 disposed on one side of the body housing 111 and located at the end of the body housing 111 away from the heat sink 200, for sealing the body housing 111.

[0053] Optionally, a cover can be used to enclose the main housing 111, thereby enclosing the shielding housing 120 and the power module 130. At the same time, the shielding housing 120 can be limited and fixed to prevent it from shaking and moving out of the opening during transportation.

[0054] In some preferred embodiments, the encapsulation cover 112 includes a first part and a second part, the first part corresponding to the mounting space of the power module 130 and the second part corresponding to the mounting space of the control board 121; the thickness of the first part is lower than the thickness of the second part.

[0055] Optionally, since the power module 130 requires heat dissipation, the thickness of the first part of the space corresponding to the power module 130 needs to be relatively thin to meet the heat dissipation requirements of the power module 130. Meanwhile, the control board 121 requires a greater shielding effect, so the second part of the encapsulation cover 112 is made relatively thick to improve its ability to block radiation.

[0056] In some preferred embodiments, it further includes: a line outlet 170, disposed on the first part, penetrating the encapsulation cover 112, for the removal of lines from the power module 130 and the control board 121.

[0057] Optionally, since the first part is thinner and easier to make holes, a line outlet 170 is provided in the first part so that the lines of the control board 121 and the power module 130 can extend to the outside through the line outlet 170 to communicate with other devices.

[0058] In some preferred embodiments, a handle hole 180 is also included, which is disposed on both sides of the main body shell 111 and located on both sides of the mounting space of the control panel 121, for carrying the main body shell 111.

[0059] Optionally, to facilitate the handling of the motor driver, a handle needs to be provided on the motor driver. Inwardly recessed grooves are provided on both sides of the control plate 121 of the main body housing 111 to form handle holes 180, so that the operator's hand can be held in the handle holes 180 during handling, making it easy to carry.

[0060] Example 2 Based on the above embodiments, the present invention also proposes a radiation-resistant motor driver design method. Figure 7 This is a flowchart of a radiation-resistant motor driver design method according to Embodiment 2 of the present invention, as shown below. Figure 7 As shown, the method includes: Step S1: Based on the control functions required by the motor driver, determine the types of electronic components of the motor driver and the connection relationships between the electronic components. Optionally, for the use of brushless DC motors in robots, the motor driver control function is planned, and the schematic circuit is designed to determine the types of electronic components required for the motor driver, the interconnection relationship between the electronic components, and the software function implementation method.

[0061] It should be noted that the types of electronic components used in the driver and the interconnection relationships between these components are common technologies in the driver field.

[0062] Step S2: Determine the material of each electronic component, and determine the radiation resistance based on the material of the electronic component; Optionally, the radiation resistance of electronic components varies considerably depending on the materials and processes used. For various types of electronic components, different models of supplied products (COTS, Commercial Off-The-Shelf) were selected, and irradiation tests were conducted on the electronic components to screen out a batch of products with relatively high intrinsic radiation resistance.

[0063] For a certain device in the driver, there are many models of COTS products that meet the function and parameters of the device, depending on factors such as the manufacturer and semiconductor materials. Specifically, the product with the highest radiation resistance is selected as the model to be used through irradiation testing.

[0064] Step S3: Determine the partition layout of the motor driver based on the radiation resistance and the connection relationship of electronic components. Optionally, based on the interconnection relationship of the electronic components of the motor driver and the intrinsic radiation resistance of the electronic components, a partitioned layout design is carried out for electronic components with different radiation resistance levels.

[0065] Optionally, the device layout should consider the interconnection between devices that must be ensured to realize the driver function, and based on the radiation resistance level of the devices, devices of the same level should be distributed on the same circuit board or in the same area of ​​a circuit board as much as possible.

[0066] Step S4: Based on the partition layout of the motor driver, configure the heat dissipation structure and shielding structure for the electronic components. Optionally, based on the intrinsic radiation tolerance of each electronic component and the zoning results, independent shielding and hardening are performed on each zone to meet the overall radiation tolerance target of the driver. This requires considering the heat generation of each electronic component within the driver and taking into account the driver's heat dissipation requirements. Currently, the main heat-generating component in the driver is the power transistor, among which silicon carbide power transistors can achieve an intrinsic radiation tolerance of 10. 4 Gy ( 60 Therefore, considering setting the overall radiation resistance of the driver within this range can greatly simplify the shielding structure and heat dissipation design.

[0067] Step S5: Based on the heat dissipation structure and shielding structure, the motor driver is packaged and integrated.

[0068] Optionally, the driver components can be packaged and integrated based on the heat dissipation and shielding structures.

[0069] Through steps S1 to S5, the radiation resistance of the driver is achieved at three levels: first, electronic component screening through irradiation testing to select driver electronic components with relatively high intrinsic radiation resistance; second, circuit optimization design by re-partitioning and re-layouting the driver circuit according to the radiation resistance of each electronic component; and third, local shielding by implementing targeted local shielding reinforcement based on the radiation resistance of the electronic components and the circuit design structure. Simultaneously, the driver's functional implementation, heat dissipation design, and packaging integration are considered. Using these methods, a large quantity of driver products meeting radiation resistance requirements can be obtained quickly and at low cost, while introducing as little unnecessary weight as possible to the system.

[0070] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A radiation-resistant motor driver, characterized in that, include: The driver body (100) includes a power module (130), a control board (121), and a main body shell (111). The devices on the power module (130) are resistive and capacitive devices. A shielding shell (120) is provided on the outside of the control board (121). The shielding shell (120) is made of tungsten metal. The power module (130) and the control board (121) are placed side by side inside the main body shell (111). A heat sink (200) is installed on one side of the driver body (100). The power module (130) extends from inside the main body housing (111) to the outside of the main body housing (111) and contacts the heat sink (200). The heat sink (200) is used to conduct heat from the power module (130). A cooling fan (300) is installed on the side of the radiator (200) away from the driver body (100) to dissipate heat from the radiator (200).

2. The radiation-resistant motor driver according to claim 1, characterized in that, The shielding housing (120) includes: The shielding shell (123) has a cubic structure with a horizontal through mounting hole in the middle, and the control board (121) is placed in the mounting hole; The front cover (125) is installed on one side of the shielding shell (123) to block the mounting hole; The rear cover (126) is installed on the side of the shielding housing (123) away from the front cover (125) to block the mounting hole.

3. The radiation-resistant motor driver according to claim 2, characterized in that, Also includes: A wiring board (124) is disposed between the front cover (125) and the shielding shell (123). The shape of the wiring board (124) is the same as the shape of the side of the front cover (125) facing the shielding shell (123). The wiring board (124) is provided with a plurality of cable outlet holes (127). The cable outlet (127) extends from the center of the cable tray (124) to the edge of the cable tray (124), connecting to the external environment. The connection line of the control board (121) extends from the cable outlet (127) to the outside of the shielding shell (120).

4. A radiation-resistant motor driver according to claim 2, characterized in that, The height of the mounting hole is greater than the thickness of the control plate (121).

5. A radiation-resistant motor driver according to claim 4, characterized in that, Also includes: Two insulating fasteners (122) are disposed in the mounting hole and are U-shaped. The U-shaped openings of the two insulating fasteners (122) face the control plate (121), and the control plate (121) is fixed in the U-shaped opening.

6. A radiation-resistant motor driver according to claim 1, characterized in that, The power module (130) and the control board (121) are placed side by side inside the main body shell (111). A partition (150) is provided inside the main body shell (111) and the partition (150) is placed between the power module (130) and the control board (121). The partition (150) is provided with a wire groove (160) for wiring connection between the power module (130) and the control board (121).

7. A radiation-resistant motor driver according to claim 6, characterized in that, The space inside the main outer shell (111) where the control board (121) is placed is equal in volume to that inside the shielding shell (120); The space inside the main shell (111) for placing the power module (130) is larger than the volume of the power module (130), and the height of the space for placing the power module (130) is greater than ten times the thickness of the power module (130).

8. A radiation-resistant motor driver according to claim 1, characterized in that, Also includes: A support frame (140) is mounted on the power module (130) at one end and located at the end of the power module (130) near the heat sink (200). The support frame (140) is fixedly mounted on the heat sink (200) by bolts, and the height of the power module (130) is fixed in the middle of the space where the power module (130) is placed.

9. A radiation-resistant motor driver according to claim 1, characterized in that, The driver body (100) also includes: An encapsulation cover (112) is disposed on one side of the main body shell (111) and located at the end of the main body shell (111) away from the heat sink (200), for sealing the main body shell (111).

10. A radiation-resistant motor driver according to claim 9, characterized in that, The encapsulation cover (112) includes a first part and a second part, the first part corresponding to the mounting space of the power module (130) and the second part corresponding to the mounting space of the control board (121); The thickness of the first part is less than the thickness of the second part.

11. A radiation-resistant motor driver according to claim 10, characterized in that, Also includes: A line outlet (170) is provided on the first part, penetrating the encapsulation cover (112), for the line to be removed from the power module (130) and the control board (121).

12. A radiation-resistant motor driver according to claim 1, characterized in that, Also includes: Handle holes (180) are provided on both sides of the main body shell (111) and located on both sides of the mounting space of the control panel (121) for carrying the main body shell (111).

13. A method for designing a radiation-resistant motor driver, characterized in that, include: Based on the control functions required by the motor driver, determine the types of electronic components in the motor driver and the connection relationships between the electronic components; The material of each electronic component is determined, and the radiation resistance is determined based on the material of the electronic component; Based on the radiation resistance and the connection relationship of the electronic components, the partition layout of the motor driver is determined; Based on the partition layout of the motor driver, the electronic components are configured with heat dissipation and shielding structures. The motor driver is packaged and integrated based on the heat dissipation structure and the shielding structure.

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