Overview
The Lift Inverter Function (also known as an Elevator ARD/UPS system) is a specialized secondary power backup solution engineered explicitly for traction and hydraulic elevator systems.
Product Specifications
|
Parameter |
Specification |
|
Output Voltage |
380V / 400V / 415V AC ±1% |
|
Input Voltage Range |
300V – 460V AC |
|
Output Waveform |
True sine wave, THD <3% |
|
Frequency |
50Hz / 60Hz auto-sensing |
|
Voltage Sag Tolerance |
Down to 70% for up to 200ms |
|
Phase Protection |
Auto phase-sequence correction |
Technical Specification
|
Parameter |
Specification |
|
Power Range |
5.5 kW – 45 kW |
|
Peak Surge Capacity |
300% starting current for up to 3 seconds |
|
Duty Cycle |
100% continuous, 30 rescue ops/hour |
|
Regen Braking |
Built-in chopper, up to 120% rated power |
|
Thermal Derating |
Full rated output to 45°C, 1%/°C up to 55°C |
|
Current Loop Response Time |
≤ 2.0 ms (vector control torque dynamic response) |
|
Brake Dynamic Brake Unit |
Built-in chopper, ≥ 120% peak braking power absorption |
|
Braking Resistor Matching |
Minimum resistance support: 30 Ω (Recommended: 40 Ω / 2500 W) |
Applications & Adaptions
Protocol Interface: Direct, gateway-free integration with Monarch (BST) and Step controller systems via built-in CAN bus, RS485, and Modbus RTU, eliminating middleware configuration.
Dry Contact Array: 6 programmable digital inputs and 4 isolated relay outputs pre-configured for standard ARD signal handshakes (Inverter Ready, Run, Fault, Door Open Command).
Pre-Fabricated Wiring Looms: Ready-to-plug harnesses up to 15 meters with screwless connectors, reducing OEM factory assembly time by 40%.
IoT Expansion Slot: Dedicated slot for optional IoT gateways, enabling cloud-based monitoring of cell voltage degradation to mitigate unscheduled downtime and passenger entrapment liabilities.
OEM/ODM Customization
Chassis Engineering: Enclosure dimensions, mounting brackets, and cable entry orientations configurable for shallow pits, low overheads, and narrow MRL hoistways.
Private Labeling: Laser-etched stainless steel serial plates and custom RAL powder coat colors compliant with UL 508 and CE MD labeling traceability requirements.
Firmware Tailoring: Acceleration/deceleration ramp profiles and relay delay timings adjustable to match voltage ripple tolerances of legacy elevator drives, preventing overvoltage tripping on older control boards.
Extended Battery Enclosures: Modular stackable auxiliary battery cabinets scaling emergency ARD runtime up to 4 hours to meet high-load commercial specifications.
Prototype Turnaround: Fully functional First Article Inspection (FAI) samples accompanied by complete engineering datasheets and 3D CAD files (STEP/IGES) delivered within 25 business days from drawing sign-off.
Manufacturing Capabilities
Production Volume: Three semi-automated SMT and assembly lines with an annual output of 45,000 completed inverter units.
Solder Paste Inspection: 3D SPI paste deposition verification and 100% AOI under IPC-A-610 Class 3 standards, maintaining first-pass yield (FPY) ≥99.5%.
Thermal Burn-In Testing: Every completed unit undergoes a mandatory 48-hour full-load burn-in at 50°C to screen out early-life component failures before shipment.
Component Sourcing: Power semiconductor paths utilize original Infineon IGBT modules and Nippon Chemi-Con electrolytic capacitors, each backed by batch-level manufacturer Certificates of Analysis (CoA).
CNC Metal Fabrication: In-house sheet metal processing of 1.5mm and 2.0mm cold-rolled steel enclosures via automated laser cutters at ±0.1mm tolerance.
In-Circuit Testing: 100% ICT and functional test (FCT) stations verify short-circuit, over-voltage, and phase-loss thresholds before final QA release.
After-Sales Service
Warranty: 3-year replacement warranty on inverter modules and 12-month warranty on battery cells, backed by a tracked Annual Failure Rate (AFR) <0.45% across 80,000 active global units.
Lifecycle Support: Replacement PCBs, cooling fans, and contactors guaranteed available for 10 years following model discontinuation to secure long-term maintenance continuity.
Tier-3 Engineering Support: Direct access to L3 application engineers with a 2-hour window for initial diagnostic feedback and a 24-hour resolution target for field commissioning issues.
Technical Training: Standardized certification documentation and step-by-step video modules covering installation, commissioning, diagnostics, and preventive maintenance.
RMA Logistics: Critical replacement components dispatched via international express air freight within 48 hours of ticket validation.
Certificates
FAQ
Q: How long does a typical installation and commissioning take?
A: A standard retrofit installation takes 3–5 hours for a mid-size machine room elevator. Commissioning and auto-calibration require an additional 40–60 minutes before the system enters standby readiness.
Q: What is the expected service life of the main power module?
A: Under 40–45°C operating environments, the core inverter power module is typically designed for 8–10 years of service life. Capacitor degradation becomes the primary limiting factor after extended high-temperature cycling.
Q: What is the system-level MTBF in real-world elevator applications?
A: Field reliability models place MTBF at approximately 120,000–150,000 operating hours, depending on load profile.
Q: What is the typical battery replacement cycle and degradation rate?
A: Lithium-based backup packs generally require replacement every 4–6 years, depending on usage frequency. Capacity retention remains above 80% during the first 2,000 partial discharge cycles under standard operating conditions.
Q: How does the system behave during repeated grid instability or frequent power dips?
A: The unit sustains up to 30 emergency cycles per hour without thermal or performance degradation. Internal energy buffering logic prioritizes ride completion over battery preservation during unstable grid conditions.
Q: What environmental protection level is supported for machine room and MRL installations?
A: Standard enclosure is rated IP20 for machine room deployment, with optional IP54 upgrade for dusty or high-humidity environments. Operation is stable between -10°C and 55°C with humidity tolerance up to 95% non-condensing.
Q: What happens if the elevator controller is not compatible with standard communication protocols?
A: The inverter automatically switches to dry-contact emulation mode on non-standard control systems. This allows basic ARD functionality - controlled descent and door release - without digital bus communication.
Q: What is the acceptable input voltage fluctuation range before switching to backup mode?
A: Normal operation is maintained within ±15% voltage deviation without activating backup support. Short-duration sag events are tolerated down to 70% nominal voltage for up to 200 milliseconds.
Q: What is the recommended preventive maintenance interval?
A: Preventive maintenance is recommended every 12–18 months, focusing on capacitor health, cooling efficiency, and relay switching accuracy.
Hot Tags: lift inverter function, China lift inverter function manufacturers, suppliers, factory, elevator control board, elevator DC power supply, elevator electrical interface board, elevator motor control module, elevator speaker module, elevator traction motor controller