MagnaDrive - Model ASD - Adjustable Speed Drive
The MagnaDrive Adjustable Speed Drive (ASD) is breakthrough speed control technology designed to reduce your total cost of ownership by lowering maintenance and operating costs, increasing process availability, and improving system reliability.
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Product Details
Ideally suited to pump, fan and blower applications, the MagnaDrive ASD is available in sizes ranging from 5 to 4,000 horsepower and speeds up to 3,600 RPM. Lower maintenance and operating costs are a result of transferring torque from motors to driven equipment across an air gap without shaft-to-shaft physical connection. This 'disconnected connection' provides reduced vibration that inceases bearing and seal life.
Simple, reliable and low cost, the MagnaDrive ASD provides the energy savings of speed control without the problems often associated with Variable Frequency Drives. System complexity is reduced, vibration is minimized and alignment problems disappear. Motor systems can be resized for lower cost and more efficient operation.
Applications currently benefiting from use of the MagnaDrive ASD include: pumps, fans, blowers, centrifuges, and bulk handling equipment. Industries served include: water and wastewater treatment, pulp and paper manufacturing, power generation, oil & gas processing, cement, mining, chemical & food processing, irrigation, maritime and HVAC systems. These installations are demonstrating significant energy savings and reduced system vibration.
Specifications
The MagnaDrive Adjustable Speed Drive (ASD) product line comes in four basic sizes: Small, Medium, Large and Mega. In order to identify generally which size is right for your application please review the Drive Sizing Chart below.
MagnaDrive ASD Model Selection
To select an ASD for your system, determine the maximum running horsepower and maximum running speed required by your pump or fan. The maximum speed and horsepower needed in a system with MagnaDrive speed control is usually less than in a fixed speed system using dampers or throttling valves. Both the speed and horsepower information is important, since the MagnaDrive ASD must be sized to deliver the maximum torque needed in your system.
The MagnaDrive ASD requires some slip between the driven speed and the output speed. The ASDs sized in this table have 1% to 4% slip when operated at full rated motor speed and torque. This information is for general sizing only. Contact MagnaDrive Application Engineering for detailed information on your particular installation.
MagnaDrive Adjustable Speed Drive Sizing Chart
Centrifugal applications only (pumps, fans, blowers, mixers). For non-centrifugal applications, contact MagnaDrive.
Installation and Dimensional Information
Installation and Dimensional Information
The ASD consists of two major components. The Copper Conductor Assembly is directly connected to the motor (input) shaft. Its weight is shown in the 'Motor Shaft Weight' column of the table below. The Magnet Rotor Assembly and the Actuation Components are directly connected to the load (output) shaft, and their combined weight is shown in the 'Load Shaft Weight' column of the table.
The overall dimensions required by the MagnaDrive ASD are defined in the cross-section drawing and the table. The axial distance needed between the end of the motor shaft and the end of the load shaft to install these two assemblies is stated in the 'DBSE' column of the table. The actual diameters of your motor and load shafts will be used to size the mounting hub dimensions prior to the installation of the ASD.
The peak torque capacity is independent of speed, and is stated in the table.
Adjustable Speed Drive Standard Dimensions and Design Characteristics
MagnaDrive Actuator
MagnaDrive Actuator
The MagnaDrive ASD's output is controlled by an actuator. The actuator allows the process control signal to modulate the speed or torque output of the drive to satisfy your process control requirements. MagnaDrive's standard actuator is electric, although any form of actuator (hydraulic, pneumatic, etc.) can be utilized.
Standard ASD Electric Actuator
Actuation Control Power: 110 VAC, 4-20 milliamp
Control Signal Options: 1-5 vdc, 0-10 vdc
A manual control is also available by special order for systems where automatic process control is not appropriate.
MagnaDrive Motor Base and Installation Hardware
Adjustable motor mounting plates and actuator mounting hardware are available to facilitate installation. These items have been engineered to simplify the conversion and installation of the MagnaDrive system at the site. Contact us for details on these items.
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