RIM Design Assistant

This program works with MagNet to analyze and extract performance parameters of 3-phase rotary induction motors.

The user enters the geometric and electrical specification of the motor by filling out a few forms. RIM Design Assistant then uses MagNet to solve the electromagnetic problem based on the specification entered by the user. Once the electromagnetic solution is obtained from MagNet, RIM Design Assistant calculates the performance parameters. The performance parameters are written into an Excel spreadsheet file.

Input Parameters

• Number of poles
• Stator winding configuration
• Excitation type
• Slip
• Excitation magnitude
• Supply Frequency
• Stator geometry
  • Inner diameter
  • Outer diameter
  • Stack length
  • Number of stator slots
  • Point set defining the shape of one stator slot
• Stator material
• Stator winding
  • Cross-sectional area of one winding turn
  • Number of parallel circuits
  • Coil pitch fraction
  • Number of series turns
  • Coil overhang specified in two segments
  • Coil height
  • Coil width
  • Coil material
• Rotor geometry
  • Inner diameter
  • Outer diameter
  • Number of rotor bars
  • Point set defining the shape of one rotor slot
• Rotor material
• Shaft material
• End ring geometry
  • Effective inner diameter
  • Outer diameter
  • Thickness
• Rotor bar resistivity
• End ring resistivity

Performance Parameters

• Global solution results
  • Input Power
  • Power factor
  • Average phase current
  • Line current
  • Average phase voltage
  • Line voltage
  • Air gap power
  • Mechanical Power
  • Adjusted output torque
  • DC stator copper losses
  • AC stator copper losses
  • Rotor power loss
  • Total losses
  • Efficiency
• Stator specific solution results
  • Voltage and phase for each of the 3 phases
  • Current and phase for each of the 3 phases
  • Input Power
  • Total AC power loss in stator conductors
• Rotor specific solution results
  • Total power loss in rotor bars
  • Average rotor bar current
• Stator winding information input data
• End winding information input data
• Output data
  • End winding resistance
  • End winding reactance
• Motor specific results
  • Time averaged energy
  • Torque