When designing the structure of an electrical control cabinet, engineers usually analyze multiple aspects and solve various conflicts at the same time. Effective electrical cabinet design involves adjusting the design while analyzing until it meets all the requirements. The overall design process for electrical cabinets includes the following steps:
The structure design flow includes the following content:
- Cabinet types: standing cabinet, console cabinet, centralized, distributed, rack-mounted
- Basic elements: structural drawing, electrical schematic, cabinet size, enclosure size system, overall dimensions, application scenarios, ergonomic size requirements. These elements collectively form the foundation of electrical cabinet design.
- Design process: understand product specifications → divide enclosures → overall layout → internal arrangement → cabinet elevation drawing → panel layout → compare solutions
- Key decisions: product type, structural form, manufacturing method, material selection, cabinet-to-enclosure connection, electrical connection method, storage and transport conditions
- Verification process: structural sketch → prototype design → production conditions → prototype making → trial run → routine testing. Verification is a critical part of electrical cabinet design.
1. Understand Technical Requirements and Application Conditions
After receiving the design task, the designer should take the initiative to understand the device’s technical parameters, functional goals, size and weight limits, and working environment, including climate, mechanical, transportation, and storage conditions. These aspects are crucial for a successful design of an electrical cabinet to meet all requirements.
2. Determine the Cabinet Structure Plan
Based on the electrical schematic, the designer needs to create a logical structure block diagram to define the structural plan. The diagram should clearly show how the equipment is divided into sub-units. For simple systems, the designer can skip this step and only divide the equipment into units or parts. During this process, the designer must ensure each sub-cabinet’s panel, frame, and size meet the standards in the electrical cabinet design.
1) Define Structural Type
The designer should identify the cabinet’s dimensions, whether it uses a box, cabinet, or console style, and whether the product is intended for indoor or outdoor use. Proper consideration of these factors is vital in designing an effective electrical cabinet.
2) Choose Cabinet Materials
Depending on the design needs, the designer must choose steel, aluminum, plastic, stainless steel, etc., and decide whether to use profiles or sheet materials. Choosing the right materials is a key part of the overall electrical cabinet design process.
3) Identify Production Scale
In the prototype stage, designers often use manual or basic machining methods based on existing factory conditions. For mass production, they will use special equipment, molds, and other tools. So, in the design process, the designer must consider the transition from prototyping to full-scale production of the cabinets.
3. Select Cabinet Materials
Designers should choose the right enclosure and cabinet materials based on the equipment’s weight and performance requirements, so they can properly handle shock absorption, corrosion resistance, heat dissipation, and electromagnetic shielding. Common materials include steel, aluminum profiles, composite sheets, and engineering plastics. These choices are integral to a successful design of electrical cabinets.
4. Design the Panel and Internal Layout
Using the initial layout and cabinet size, designers determine the panel dimensions and refer to the elevation diagram of the enclosure on the cabinet. When selecting and arranging control components and displays, they focus on electrical performance, ease of use, and appearance in the cabinet design.
At the same time, designers plan the internal layout based on the schematic diagram, the sizes of major components, their relationships, and factors such as ventilation, shock protection, and shielding. If the device involves mechanical parts like a tuning transmission mechanism, the designer must design them in advance or select suitable models to define the electrical cabinet’s space layout.
5. Finalize the Cabinet Structure and Draw Sketches
After completing the steps above and confirming the cabinet structure, designers should create structural sketches to prepare for detailed drawings and production. This step is pivotal in designing electrical cabinets.
