• The three main materials used to build IMs are of magnetic, electric, and insulation type.
• As the IM is an a.c. machine, reducing eddy current losses in its magnetic core is paramount.
• It is shown that these losses increase with the soft magnetic sheet thickness parallel to the external a.c. field.
• Soft magnetic materials (silicon steel) used in thin laminations (0.5 mm thick up to 200Hz) have low hysteresis and eddy current losses (about or less 2 W/kg at 1 T and 60 Hz).
• Besides losses, the B-H (magnetization) curve characterizes a soft magnetic material.
Related posts:
OPERATING CHARACTERISTICS OF INDUCTION MOTORS:POWER FACTOR CONTROL AND ENERGY OPTIMISATION
Flow switches and sensors:Flow Sensors
Electric Motor Manual – INSTALLATION METHODS – Identification diagrams speed troubleshoo...
Data Compression:MPEG Layer 2 Audio Coding (MUSICAM)
Troubleshooting control circuits:Automatic sequence starting
Alternators:Synchronous Reactance
SPLIT-PHASE MOTOR - POLYPHASE MOTOR STARTERS (Motor Starting Methods)
Loudspeaker Enclosures:The Interrelation of Components
Magnetic Contactors
INDUCTION MOTORS – ROTATING FIELD, SLIP AND TORQUE:THE ROTATING MAGNETIC FIELD
Induction motor:Condition for Maximum Starting Torque
Power Supply Design:Solid-State Rectifiers
Troubleshooting:Voltmeter Basics
CONVENTIONAL D.C. MOTORS:THYRISTOR D.C. DRIVES – GENERAL