PWM-Inverters for Lifts Loher DYNAVERT L

Compact and tailored for these applications

Overview

General description
Technical data overview
Features
Customer benefits
Typical applications

General description

Loher frequency inverters for elevators, DYNAVERT L guarantee the highest degree of reliability and travel comfort.
Depending on the particular requirement, they can be flexibly used for supply voltages extending from 230 V to 500 V. They can control both synchronous as well as induction motors.
DYNAVERT L units are efficient, easy to handle and can be used for elevator systems with ratings of up to 105 kW. They are state-of-the-art fully digitized voltage-source DC link converters equipped with fourth generation IGBTs.
Their equipping means that they can be easily used in all operating environments – even in hospitals and chemical plants.
Today, elevator drives are designed either as gearless or as geared solutions. The benefit of using Loher DYNAVERT L - it is suitable for both systems by setting software parameters only – ee. within DYNASYS S - at gearless and within DYNASYS G at geared solutions.

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Technical data overview

Rated input voltage	Typ. rated motor power of the units
400 V	2 - 105 kW
500 V	2 - 105 kW
1~AC 230V supply - using either UPS or 100V - 400V DC from a battery possible, for evacuation operation when the line supply fails

Brief overview
Setting, diagnostics:	Operator panel connected to Dynavert L, LEDs, serial interface
Control commands:	Contacts or 24 V control signals (PLC-compatible for travel commands and other digital input), DCP interface
Motor typs:	Synchronous / induction – gearless or with gear
Signal outputs:	Isolated contacts, 250 V AC /1A, DCP interface
Speed feedback for synchronous motors:	1 V-PP signal level (max. 10 m encoder cable)
Speed feedback for induction motors:	Encoder with HTL signal level or TTL signal level, the pulse number can be parameterized, 1024 - 4096 pulses / revolution (2 tracks with 90° offset).
Open-loop operation:	Possible with induction motors up to 1.2 m/s elevator cabin speed
Mechanical degree of protection:	IP20
Ambient temperature, storage:	-25 to +70 °C
Ambient temperature, operation:	0 to + 45 °C
Installation height:	1000 m above sea level; above this altitude, the drive unit utilization must be reduced by 10 % for every 1000 m
Cooling:	Direct forced air cooling, automatic temperature control

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Features

DYNAVERT L frequency inverters – cost-effective and powerful

Highest performance at a low cost – 50 % energy saving over standard drives
Can be connected to TN, TT and IT line supplies up to 500 V
Safe, reliable and disturbance-free operation using the integrated filter, reactors and contactor(s) for the travel commands
Quick and easy commissioning using optimum control adaptation and user-friendly, PC-supported software – IMS
Conventional and DCP interface that can be adapted to all elevator controls
EMC directives are fulfilled without requiring any additional mounted components
Ready-to-install frequency inverter saves installation time significantly
Integrated solution of the power components reduces costs for the higher-level elevator control

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Customer benefits

Compact and ready-to-connect unit with integrated EMC filter, line reactor, braking chopper, braking resistor and a quiet contactor for the travel commands. This is the reason that no additional wiring is required
Up to an elevator power of 30 kW the drive unit can be accommodated in a control cabinet with a depth of 260 mm
Operation with only one contactor for the travel commands in conformance with DIN EN 81-1 possible – TÜV certified (German Technical Inspectorate)
Encoder inputs integrated as standard to control synchronous and induction motors
Comfortable operation possible – even without speed feedback ( for asynchronous motors, up to approx. 1.2 m / s passenger cabin speed only)

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