Defining the General Data for a Single-Phase Induction Motor

Use the General Data Properties window to define the basic parameters of the induction motor, such as the number of poles, frictional loss, and operation mode.

To define the general data:

  1. To open the General Data Properties window, double-click the Machine entry in the project tree on the desktop. (You can also enter values in the Properties section of the desktop without opening a separate window.)
  2. Enter the number of poles for the machine in the Number of Poles field. This value is the total number of poles in the stator (or the number of pole pairs multiplied by two).
  3. Select one of the following for the Rotor Position:
  1. Enter the energy loss due to friction at the given speed in the Frictional Loss field.
  2. Enter the wind loss due to air resistance measured at the reference speed in the Wind Loss field.
  3. Enter the given speed in the Reference Speed field.
  4. Select the Operation Mode:
    1. Click the button.
      The Select Operation Mode window appears.
    2. Select from one of the following:

      C-Run

      Capacitance-run mode. The capacitor is in series with the auxiliary winding. In the Capacitor run mode, the capacitor will be designed (if the auto-design mode is selected) to minimize the backward magnetomotive force.

      C-Start

      Capacitance-start mode. The auxiliary winding is in series with the capacitor and is disconnected when the rotor reaches the switching speed.

      C-R&S

      Capacitance-run and start mode. Two capacitors are in series with the auxiliary winding; one for starting, one for running.

      R-Start

      Resistor-start mode. The auxiliary winding is disconnected when the rotor reaches the switching speed.

    3. Click OK to close the Select Operation Mode window and return to the Properties window.
  5. Enter values in the following capacitance, resistance, and switching speed fields:

    Run Capacitance

    Available for C-Run, C-R&S

    Run Resistance

    Available for C-Run, C-R&S

    Start Capacitance

    Available for C-Start, C-R&S

    Start Resistance

    Available for C-Start, C-R&S

    Switching Speed

    Available for C-Start, C-R&S, R-Start

  6. If the start winding needs to be optimized, select the Objective Type from the following three options:
    • (Tst/Ist)max. Accept the defaults. This is the ratio of the maximum starting torque to the starting current ratio.
    • (Tst)max. Enter the given start current ratio. This is the maximum starting torque
    • (Ist)min (minimum starting current). Enter the given start torque ratio.
    Note: The start-winding optimization goal is disabled for the C-Run operation mode. In capacitor-run mode, the capacitor is designed to minimize the backward magnetomotive force. For other modes, if the auto-design function is active, the capacitor and the resistance are designed according to the start goal, selected from the following:
    • The maximum value of (Starting Torque/Starting Current).
    • The maximum starting torque.
    • The minimum starting current.
  7. Click OK to close the Properties window.