These motors are designed for the application form requirements of variable 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 specifically designed to handle adjustable torque loads such as for example pumps and fans.
Due to quick switching and reflections in the cables, motors are subject to more voltage stress in the windings when fed by frequency converters than with sinusoidal supply voltage. The result of these voltages can be 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 will need reinforced winding insulation, or the drive will need to have a du/dt filter.
Above 600 V, the motor needs to have reinforced winding insulation and the drive must possess a du/dt filter.
If the cable size between your drive and motor is greater than 150 meters and the voltage is between 600 and 690 V, the engine will need to have reinforced winding insulation.
A variable-frequency drive is something for controlling the rotational swiftness of an alternating current electric engine. It handles the frequency of the electrical power supplied to the electric motor. A adjustable frequency drive is usually a specific kind of adjustable-velocity drive. Variable-frequency drives are also known as adjustable-frequency drives (AFD), variable-speed drives (VSD), AC drives, or inverter drives.
Automatic frequency control consist of an primary electric circuit converting the alternating electric current into a immediate current, after that converting it back into an alternating current with the mandatory frequency. Internal energy reduction in the automated frequency control is ranked ~3.5%
Variable-frequency drives are widely used on pumps and machine tool drives, compressors and in ventilations systems for large buildings. Variable-frequency motors on enthusiasts save energy by permitting the volume of atmosphere moved to complement the system demand.
Reasons for employing automated frequency control can both be related to the features of the application form and for saving energy. For example, automatic frequency control can be used in pump applications where in fact the flow is definitely matched either to volume or pressure. The pump adjusts its revolutions to confirmed setpoint via a regulating loop. Adjusting the flow or pressure to the actual demand reduces power usage.
An AC motor rate control-also referred to as a adjustable frequency drive, adjustable frequency drive, variable rate drive, adjustable swiftness drive and AC inverter-is an electro-mechanical object that can be Variable Drive Motor utilized to improve the output acceleration of an AC engine by adjusting the input frequency in to the motor.