Description
11LIFT 4kW Elevator Inverter – Precision Control for Mid-Range Vertical Transportation
The 11LIFT 4kW (Drive-4KW-4) is a high-performance elevator drive engineered for smooth operation of passenger and cargo elevators up to 4kW motor capacity. Featuring dual CPU architecture, closed-loop vector control, and 0 Hz 200% torque output, this industrial-grade VFD ensures precise floor leveling, robust safety, and seamless UPS-backed rescue operation for PMSM gearless motor systems.
Key Features & Industrial Advantages
🎯 Precision Motion Control
- Dual CPU Architecture: Dedicated processors for motor control and elevator logic ensure real-time responsiveness and fail-safe operation
- Closed-Loop Vector Control: Encoder feedback support for precise speed regulation and floor leveling accuracy within ±2mm
- 0 Hz 200% Torque: Full holding torque at standstill prevents cabin rollback and ensures passenger safety during loading
- Anti-Rollback Function: Specialized protection for permanent magnet synchronous motor (PMSM) gearless elevators
⚡ Built-In Safety & Reliability
- Integrated 4kW Brake Unit: Built-in braking resistor control eliminates external component costs and panel space
- Multiple UPS Operation Modes: Automatic rescue operation during power failure moves cabin to nearest floor for safe evacuation
- RS485 Communication Interface: Seamless integration with elevator control panels and building management systems
- Removable PG Cards: Field-serviceable encoder interfaces reduce maintenance downtime
🔧 Industrial-Grade Design
- 4kW Optimized Power: Ideal for 6-10 passenger elevators or 500-800kg cargo lifts
- Three-Phase 380V Input: Standard industrial voltage compatibility (380–440V operating range)
- S-Curve Acceleration Profiles: Smooth jerk-free ride quality with customizable acceleration curves
- IP20 Enclosure: Panel-mount design for elevator machine room installation
Technical Specifications – 11LIFT 4kW Model
| Parameter | Drive-4KW-4 Specification |
|---|---|
| Model Number | Drive-4KW-4 |
| Motor Power | 4 kW |
| Power Capacity | 8.5 kVA |
| Input Voltage | Three-phase 380V (380-440V range) |
| Input Current | 8.5 A |
| Output Current | 9.5 A |
| Control Method | Closed-loop & Open-loop vector |
| Torque Characteristic | 0 Hz 200% torque output |
| Brake Unit | Built-in (standard) |
| Communication | RS485 |
| UPS Operation | Multiple modes supported |
| CPU Architecture | Dual CPU |
| Motor Support | PMSM gearless / Induction motors |
| PG Card | Removable / Field-replaceable |
11LIFT Series Model Range (For Reference)
| Model | Power | Input Current | Output Current | Application |
|---|---|---|---|---|
| Drive-2.2KW-4 | 2.2 kW | 6.5 A | 5.1 A | Small passenger lifts |
| Drive-4KW-4 (This Product) | 4 kW | 8.5 A | 9.5 A | Mid-range passenger/cargo |
| Drive-5.5KW-4 | 5.5 kW | 8.9 A | 13 A | Heavy-duty cargo lifts |
| Drive-7.5KW-4 | 7.5 kW | 20.5 A | 18 A | Commercial elevators |
Extended models available up to 160kW for heavy-duty industrial freight elevators. Contact us for complete series specifications.
Ideal Applications for 4kW Model
- Residential Passenger Elevators: 6-10 person capacity with smooth, quiet operation
- Hospital Bed Lifts: 4kW capacity for stretcher and medical equipment transport with precise leveling
- Commercial Cargo Lifts: 500-800kg freight capacity for warehouses and retail back-of-house
- Home Villa Elevators: Premium residential lifts with PMSM gearless motor compatibility
- Service Elevators: Kitchen and maintenance lifts in hotels and commercial buildings
Frequently Asked Questions
Does the 11LIFT 4kW require an external brake resistor?
No. The Drive-4KW-4 includes a built-in brake unit as standard equipment. The integrated braking control handles regenerative energy from 4kW motors during deceleration, eliminating the need for external resistors and reducing installation costs. For applications with exceptionally high duty cycles or rapid deceleration requirements, optional external braking resistors can be configured.
What happens during a power failure? Is there battery backup?
The 11LIFT 4kW supports multiple UPS (Uninterruptible Power Supply) operation modes. When connected to a UPS or battery backup system (not included), the inverter automatically detects power loss and switches to rescue mode. The system slowly moves the elevator cabin to the nearest floor, opens the doors, and releases passengers safely. This function is critical for passenger safety codes in most jurisdictions.
Can I use this 4kW inverter with a gearless PMSM motor?
Yes. The 11LIFT 4kW is specifically optimized for permanent magnet synchronous motor (PMSM) gearless elevators. It includes dedicated anti-rollback protection that prevents cabin movement when the mechanical brake is released during door operation—essential for gearless systems. The closed-loop control mode supports encoder feedback from PMSM motors for precise speed and position control.
What is the difference between closed-loop and open-loop control?
Closed-loop control uses encoder feedback from the motor to precisely regulate speed and position, providing ±2mm floor leveling accuracy required for passenger elevators. Open-loop control operates without encoder feedback, suitable for simpler cargo lifts or induction motor applications where extreme precision is less critical. The 11LIFT 4kW supports both modes, configured via parameter settings.
Is this inverter compatible with my existing elevator control panel?
Yes. The RS485 communication interface supports standard elevator industry protocols, allowing integration with most modern elevator control systems. The dual CPU architecture dedicates one processor to motor control and another to elevator logic communication, ensuring real-time responsiveness without interference. Contact our technical team for specific compatibility verification with your controller brand.
Need Technical Support or Elevator Modernization Solutions?
Our engineering team provides complete drive sizing, parameter configuration, and integration support for new installations and elevator modernization projects.
Request 4kW Elevator Drive Quote
📞 Direct technical support: +86 18357241165 (WeChat/WhatsApp)
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