AC Motor Repair
WIM Engineering repairer’s AC & DC Motors, Transformers, Welding Machines, and manufacture 80 percent of all Electrical Components associated with these devices.
An AC motor is an electric motor driven by an alternating current (AC).
It commonly consists of two basic parts, an outside stationary stator having coils supplied with alternating current to produce a rotating magnetic field, and an inside rotor attached to the output shaft that is given a torque by the rotating field.
A DC motor is a mechanically commutated electric motor powered from direct current (DC). The stator is stationary in space by definition and therefore so is its current. The current in the rotor is switched by the commutator to also be stationary in space.
DC motors have a rotating armature winding but non-rotating armature magnetic field and a static field winding or permanent magnet. Different connections of the field and armature winding provide different inherent speed/torque regulation characteristics. The speed of a DC motor can be controlled by changing the voltage applied to the armature or by changing the field current. The introduction of variable resistance in the armature circuit or field circuit allowed speed control.
WIM Engineering is in partnership with the SA rail sector in the repair and refurbishment of exhausters. With a well-rounded team of experienced personnel, WIM engineering offers good quality exhausters at an economical price. An exhauster is a component which releases the brake system on a train for the train to move.
FLAME PROOF MOTORS
Flameproof motors are designed to withstand any damage the pressure caused by an internal explosion and are also able to prevent flame propagation outside.
Flameproof motors are used where safety against explosions and fires caused by gases, dust and liquids must be guaranteed.
The microprocessor traction controller monitors all the required parameters and signals required for the correct operation of the traction equipment. It controls the equipment in accordance with the commands dictated by the control software.
To control the sequence of a motor coach is a relatively simple function for a microprocessor to perform. The operation of each high voltage switch is under the direct control of the software thus eliminating series interlocks and cam dependant time delays and overlaps. With the installation of a Microprocessor, it was possible to introduce many additional features to the motor coach control system as is described below.
MEDIUM VOLTAGE MOTORS
RAIL WHEEL RE-PROFILING
The condition maintenance and periodic replacement of railway wheel sets represents a significant cost faced by Train Operating Companies. Rail wheels wear slowly and could be expected to last for 10 years or more based on normal wear considerations.
They are, however, also subject to tread damage caused by wheel slide events, rolling contact fatigue, flange
wear and tread rollover. Therefore, wheels require regular re-profiling by machining.
WIM Engineering delivers a high-quality wheel re-profiling service that could increase the expected life of a rail wheel.
Traction motor refers to an electric motor providing the primary rotational torque of a machine, usually for conversion into linear motion (traction).
Traction motors are used in electrically powered rail vehicles such as electric multiple units and electric locomotives, other electric vehicles such as electric milk floats, elevators and conveyors as well as vehicles
with electrical transmission systems such as diesel-electric, electric hybrid vehicles and battery electric vehicles.
A transformer is a static electrical device that transfers energy by inductive coupling between its winding circuits. A varying current in the primary winding creates a varying magnetic flux in the transformer’s core and thus a varying magnetic flux through the secondary winding. This varying magnetic flux induces a varying electromotive force (emf) or voltage in the secondary winding.
Underground mine ventilation provides a flow of air to the underground workings of a mine of sufficient volume to dilute and remove noxious gases (typically NOx, SO2, methane, CO2, and CO).
The source of these gases is equipment that runs on diesel engines, blasting with explosives,  and the orebody itself.  The largest component of the operating cost for mine ventilation is electricity to power the ventilation fans, which may account for one third of a typical underground mine’s entire electrical power cost.
Ventilation includes both the exchange of air to the outside as well as circulation of air within the mine. It is one of the most important factors for maintaining acceptable air quality in mines.
At We in Motion we offer a local content Schunk pantograph as we feel local content is necessary to maintain the performance, reliability and safety of pantographs.
Schunk pantographs from We in Motion offer the following features: