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Senkuo SKB Series Backpack Inverter
Rated Voltage
Rated Power
Protection Rating
Mounting Method
Purchase Quantity
Stock Remaining：500units
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Product Overview
The SKB series backpack inverter is a compact high-performance vector control device designed for space-constrained applications. Featuring an integrated design, it can be directly mounted on motors or machinery. It supports both asynchronous motor and permanent magnet synchronous motor drives. With compact size, light weight, high protection rating, and flexible installation, it is widely used in automated production lines for textile, food, packaging, and printing industries. It adopts advanced sensorless vector control (SVC) algorithm, delivering excellent low-speed torque performance and dynamic response.
Compact Design
Only 40% the volume of conventional inverters and 50% lighter, can be directly mounted on motors to save space
High Protection Rating
IP65 protection rating, dustproof and waterproof, suitable for harsh industrial environments without additional enclosures
Efficient Heat Dissipation
Integrated heatsink design with intelligent forced air cooling system ensures stable operation in confined spaces
Quick Installation
Standardized flange interface and plug-and-play connections significantly reduce installation and commissioning time
Vector Control
Advanced SVC sensorless vector control delivers high low-speed torque and fast dynamic response
Rich Communication
Built-in Modbus, CANopen and other communication interfaces for easy integration into automation control systems
Product Structure
The SKB series backpack inverter is a compact inverter designed specifically for space-constrained applications. It features an integrated cast aluminum housing and heatsink structure, and can be directly flange-mounted on the rear of a motor or in a reserved position on machinery. The entire unit adopts a modular design concept, with the main control board, power module, and cooling system highly integrated, achieving ultimate compactness while maintaining performance. It is particularly suitable for textile machinery, food processing equipment, packaging machines, printing machines, and other applications with strict space requirements.
- Integrated Housing: High-strength cast aluminum material, combining heat dissipation and structural support, protection rating up to IP65
- Power Module: Latest generation IGBT devices, high efficiency, low heat generation, high reliability
- Main Control Board: 32-bit DSP processor for high-speed computation and complex control algorithms
- Terminal Block: Pluggable terminal design for quick wiring and maintenance
- Status Indication: LED status indicators + digital display for real-time operating status and fault codes
- Communication Interface: RS485/CAN optional, supporting Modbus RTU, CANopen and other protocols
SKB Series Backpack Inverter Models and Technical Parameters
Three-Phase 380V Class (Heavy-Duty)
| Model | Applicable Motor Power | Rated Current | Dimensions (mm) | Weight | Protection Rating |
|---|---|---|---|---|---|
| SKB400-4T | 0.4KW | 1.5A | 120×80×140 | 1.2kg | IP54 |
| SKB750-4T | 0.75KW | 2.5A | 145×95×160 | 1.8kg | IP54 |
| SKB1R5-4T | 1.5KW | 4.0A | 170×110×180 | 2.5kg | IP54 |
| SKB2R2-4T | 2.2KW | 5.5A | 195×125×200 | 3.2kg | IP54 |
| SKB3R7-4T | 3.7KW | 9.0A | 225×145×230 | 4.5kg | IP55 |
| SKB5R5-4T | 5.5KW | 13.0A | 255×165×260 | 6.0kg | IP55 |
| SKB7R5-4T | 7.5KW | 17.0A | 285×185×290 | 7.8kg | IP55 |
| SKB011-4T | 11KW | 25.0A | 320×210×330 | 10.5kg | IP55 |
Single-Phase 220V Class (Light-Duty)
| Model | Applicable Motor Power | Rated Current | Dimensions (mm) | Weight | Protection Rating |
|---|---|---|---|---|---|
| SKB400-2S | 0.4KW | 3.0A | 115×75×135 | 1.0kg | IP54 |
| SKB750-2S | 0.75KW | 5.0A | 140×90×155 | 1.5kg | IP54 |
| SKB1R5-2S | 1.5KW | 8.0A | 165×105×175 | 2.2kg | IP54 |
| SKB2R2-2S | 2.2KW | 11.0A | 190×120×200 | 3.0kg | IP54 |
Installation Dimensions Reference
Flange Mounting Dimensions
| Power Range | Mounting Hole Spacing A×B (mm) | Mounting Hole Diameter (mm) | Shaft Extension Length Requirement (mm) |
|---|---|---|---|
| ≤1.5KW | 80×80 | Φ6 | ≥60 |
| 2.2KW-3.7KW | 100×100 | Φ8 | ≥75 |
| 5.5KW-7.5KW | 130×130 | Φ10 | ≥90 |
| 11KW | 150×150 | Φ12 | ≥110 |
Terminal Block Specifications
| Terminal Type | Wire Cross-Section | Tightening Torque | Description |
|---|---|---|---|
| Power Input R/S/T | 0.5-6mm² | 0.8-1.0 N·m | Crimp terminals recommended |
| Motor Output U/V/W | 0.5-6mm² | 0.8-1.0 N·m | Shielded cable required |
| Control Signal | 0.2-1.5mm² | 0.3-0.5 N·m | Shielded twisted pair |
| Grounding PE | ≥1.5mm² | 1.2-1.5 N·m | Yellow-green wire |
Compatibility with Other Products
The SKB series backpack inverter can be used in combination with various motor control equipment:
- High-Power Motor Starting: Can be paired with online soft starters for smooth starting of high-power motors
- Centralized Power Distribution: Can be integrated with GGD low-voltage distribution cabinets or GCK low-voltage drawer cabinets
- General Inverter Requirements: For higher power or standalone installation, choose the SK600 General Inverter
- High-Voltage/High-Power Motor Drives: For high-power applications, please refer to online soft starters or online soft start cabinets
Selection Guide
Selection by Application Scenario
| Application Scenario | Recommended Model | Key Configuration | Notes |
|---|---|---|---|
| Textile Spinning Frame | SKB2R2-4T/SKB3R7-4T | IP54 + CANopen communication | Multi-motor synchronization requires synchronization function card |
| Food Filling Machine | SKB750-4T/SKB1R5-4T | IP65 + Stainless steel housing | Must meet FDA/food safety certification requirements |
| Packaging Conveyor | SKB1R5-4T/SKB2R2-4T | Standard version + Braking unit | Heavy-duty starting recommended to increase by one power level |
| Printing Feeder | SKB750-4T/SKB1R5-4T | High-precision encoder interface | Position control accuracy requirement ±0.1mm |
Selection Recommendations for Special Environments
| Environmental Condition | Recommended Configuration | Supplementary Measures |
|---|---|---|
| High temperature (>45°C) | Increase by one power level + Forced air cooling | Add external cooling fan |
| High humidity (>85%RH) | IP65 + Anti-condensation heater | Regularly power on for dehumidification |
| Dusty environment | IP65 + Air inlet filter | Clean filter monthly |
| High vibration (>1G) | Reinforced mounting base + Shock absorbers | Use locking nuts |
| Altitude >2000m | Derating (5% per 1000m increase) | Increase heatsink area |
Ordering Information
Standard Order Number Structure
SKB [Power] - [Voltage] [Special Options]
Examples:
SKB2R2-4T= 2.2KW three-phase 380V standard typeSKB1R5-2S-P= 1.5KW single-phase 220V with built-in braking unitSKB3R7-4T-C= 3.7KW three-phase 380V with CANopen communication card
Optional Accessories
| Accessory Name | Model | Function Description | Price |
|---|---|---|---|
| Braking Unit | BRU-XX | Built-in/external energy consumption braking resistor | From ¥200 |
| Encoder Interface Card | PG-B5 | Differential/open collector/UVW encoder | ¥350 |
| Communication Expansion Card | COM-CAN | CANopen interface | ¥280 |
| Communication Expansion Card | COM-DP | Profibus-DP interface | ¥450 |
| Remote Keypad | KEYPAD-EXT | 2-meter extension cable keypad | ¥180 |
| Input Filter | EMI-FILT | Reduces electromagnetic interference | ¥120 |
| Output Reactor | OLR-XX | Suppresses dv/dt to protect motor insulation | From ¥250 |
| Anti-Vibration Mounting Kit | ANTI-VIB | Rubber shock absorbers + reinforced bolts | ¥80 |
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