11LIFT Open-Loop Elevator Inverter 4–30kW — Sensorless Vector Control

The 11LIFT series open loop elevator inverter delivers smooth, reliable traction control for passenger and freight lifts from 4kW to 30kW on 380–440V three-phase supply. With sensorless vector control (SVC) there is no PG card and no encoder required — installation and commissioning are simpler and the total system cost is lower.

1. Sensorless Vector Control Performance

SVC delivers 180% starting torque at 0.5Hz, a 1:100 speed range and ±0.5% speed accuracy — without any motor feedback device. Four groups of S-curve acceleration/deceleration, up to 8-step multi-speed operation, motor auto-tuning (with or without load) and AVR automatic voltage regulation ensure a smooth, comfortable ride.

2. No PG Card or Encoder — Simpler Installation & Commissioning

Unlike closed-loop drives, this open-loop model needs no encoder wiring, no PG feedback card and no encoder parameter setup. That means less hardware to buy, less cabling to run through the hoistway, faster commissioning and fewer failure points over the lift’s service life — ideal for standard asynchronous-motor lift projects.

3. Elevator-Dedicated Safety Functions

Built-in lift logic includes overspeed protection, brake contactor control, output contactor control, emergency evacuation operation during power failure, forced deceleration, direct landing, motor overheat detection and starting pre-torque compensation to prevent rollback at brake release.

4. Built-in DC Reactor & Braking Unit — Lower System Cost

An integrated DC reactor and braking unit eliminate external components, saving cabinet space and wiring cost. RJ45 external keypad interface, independent air duct and conformal-coated (three-proof) PCBs improve reliability in dusty machine-room environments.

Open-Loop or Closed-Loop — How to Choose?

• Choose this open-loop version for asynchronous (induction) motor traction, standard passenger and freight elevators, and budget-sensitive projects. No PG card or encoder is needed, so installation and maintenance are simpler and cheaper.
• Choose the closed-loop version if your project uses a PMSM (permanent magnet synchronous motor), requires full torque at 0Hz, or demands ±0.05% high-precision leveling — that version requires a PG card and encoder feedback.

Does this open-loop elevator inverter need a PG card or encoder?

No. The 11LIFT open-loop model uses sensorless vector control (SVC), so no PG card and no encoder are required at all. This reduces hardware cost, eliminates encoder cabling through the hoistway, and makes installation and commissioning noticeably simpler than closed-loop systems.

How do I choose between the open-loop and closed-loop versions?

Choose the open-loop version for asynchronous motor traction, standard passenger/freight lifts and budget-sensitive projects — it needs no PG card and still delivers 180% starting torque at 0.5Hz. Choose the closed-loop version when you use a PMSM motor, need full torque at 0Hz, or require ±0.05% high-precision leveling (that version requires a PG card and encoder).

Does it support permanent magnet synchronous motors (PMSM)?

The open-loop SVC version is designed for asynchronous (induction) motors. For PMSM traction machines we recommend the closed-loop 11LIFT version, which provides encoder-based field-oriented control suited to permanent magnet motors. Contact our engineering team with your motor nameplate for a confirmed selection.

What happens during a power failure?

The drive supports an emergency evacuation (rescue) operation scheme for power failures, working with the lift’s backup power arrangement to move the car to the nearest landing and release passengers safely. It also includes forced deceleration and overspeed protection for abnormal conditions.

Which power ratings are available and how do I select one?

Seven ratings are available on this page: 4kW, 5.5kW, 7.5kW, 11kW, 15kW, 22kW and 30kW, all for 3-phase 380–440V input. Select the rating that matches or exceeds your traction motor’s rated power — or send us the motor nameplate and we will confirm the correct model within one working day.

Need a Bulk Quote or Model Selection Help?

Standard models can be ordered directly at the listed price. For bulk orders, project configurations, or model selection based on your motor nameplate, our engineering team responds within one working day.

Email: info@vfdinverters.com | WhatsApp/WeChat: +86 183 5724 1165