These motors are designed for the application form requirements of variable Variable Drive Motor quickness drive systems. We offer both the following types of motors:

• Constant Torque: Motors specifically designed to handle constant torque loads, such as for example conveyors, positive displacement pumps, cranes, etc.
• Variable Torque: Motors particularly designed to handle variable torque loads such as for example pumps and fans.
Due to rapid switching and reflections in the cables, motors are subject to more voltage tension in the windings when fed by frequency converters than with sinusoidal supply voltage. The effect of these voltages is definitely an increase as high as 2.5 times the motor’s nominal voltage. This stresses the engine winding insulation and may cause it to break down, resulting in possible sparking. ABB recommends:

Between 500 V and up to 600 V, the motor needs to have reinforced winding insulation, or the drive will need to have a du/dt filter.
Above 600 V, the motor will need reinforced winding insulation and the drive is required to possess a du/dt filter.
If the cable duration between the drive and engine is higher than 150 meters and the voltage is between 600 and 690 V, the engine must have reinforced winding insulation.
A variable-frequency drive is something for controlling the rotational quickness of an alternating electric current electric motor. It settings the frequency of the electrical energy supplied to the motor. A variable frequency drive is certainly a specific kind of adjustable-speed drive. Variable-frequency drives are also called adjustable-frequency drives (AFD), variable-quickness drives (VSD), AC drives, or inverter drives.

Automatic frequency control consist of an primary electrical circuit converting the alternating current into a direct current, after that converting it back to an alternating electric current with the mandatory frequency. Internal energy loss in the automated frequency control is ranked ~3.5%
Variable-frequency drives are trusted on pumps and machine tool drives, compressors and in ventilations systems for huge buildings. Variable-frequency motors on enthusiasts save energy by enabling the volume of surroundings moved to match the system demand.
Reasons for employing automated frequency control can both be linked to the features of the application and for conserving energy. For instance, automatic frequency control is used in pump applications where in fact the flow is certainly matched either to volume or pressure. The pump adjusts its revolutions to a given setpoint with a regulating loop. Adjusting the flow or pressure to the real demand reduces power usage.
An AC motor speed control-also known as a variable frequency drive, adjustable frequency drive, variable quickness drive, adjustable acceleration drive and AC inverter-is an electro-mechanical object that can be utilized to improve the output swiftness of an AC motor by adjusting the insight frequency in to the motor.