Description
Product
23
TK Elevator
BA, TW45C | 6231003860 | 06/2022
The encoder used is a Wachendorff WDG100-2x2048 TTL with a 3 m line
length.
3.3.1
Engineering design
Depending on the version, the TW model series drive consists of a three-
phase motor standing vertically on the gear or flange-connected horizontally
on the gear to the worm shaft, via worm wheel, traction sheave shaft to the
traction sheave.
The drive motors are designed as device category IMB5 / V1 with a flange dia-
meter of 250 mm to accommodate the motor. Posistors are installed in the
motor to provide protection against thermal overloads.
The gear (gear drive) consists of a single-stage worm gear mounted on roller
bearings. The housing is designed in as a monoblock with two separate
flange-connected side bearing brackets.
The power transmission from the motor to the gear takes place via a flexible
coupling. A dual-circuit disc brake is installed between the motor and gear.
The traction sheave is overhung. The worm gear toothing is supplied with syn-
thetic oil during operation by means of flood lubrication.
Worm shaft and rotor shaft of the motor are connected by a flexible coupling.
This is completely maintenance free. The coupling half connected to the gear
is provided with a spline shaft profile for the operational brake.
As standard, the TW45C is delivered with a frequency-controlled three-phase
motor. An encoder for speed monitoring can be supplied as an option. This is
fitted on the motor shaft.
In the case of drives for the machine room (TWR), a handwinding wheel is
firmly mounted.
The connection of the thermal motor monitoring is located in the motor ter-
minal box.
3.3.2
Brake
Different versions of the operational brake are used, depending on the loca-
tion of the machine.
The operational brakes integrated between the gear and motor are redund-
antly structured electromagnetic 2-circuit disc brakes with an integrated
elastic dog clutch (plug-in type) for the connection of motor and worm shaft.
i
The brake TW45C is intended for static application as a parking brake. Dy-
namic braking is restricted to emergency and inspection braking.
Emergency braking device NBS
The optional version of the emergency brake system (NBS) meets the require-
ments for the protection device that prevents overspeed in the upward-mov-
ing elevator and unintended movement of the elevator car (UCM).
i
Details of the emergency brake (NBS) can be found in a separate operating
manual that is supplied if the brake is fitted.
