Work. Pt. - Sine wave - P.Pf.U.N

Positioning and objective

The aim of the test “Working point – Sine wave – Motor & Generator – P, Pf, U, N” is to characterize the behavior of the machine when operating at the working point that is targeted by the user. This point is defined by:
  • the output power which can be either the electrical power transmitted to the stator winding if the machine is in generator operation, or the mechanical power exerted on the shaft if the machine is in motor operation. If the generator operation is targeted, the output power can be replaced by the apparent power.
  • the power factor,
  • the line-line voltage,
  • and the rotating speed.

Through this test, the user can also verify whether the desired operating point is compatible with the machine. Additionally, the user can identify the appropriate reference values for the field current and the control angle needed to achieve this operating point.
“Working point – Sine wave – Motor – P, Pf, U, N” illustration
Family Working point
Package Sine wave
Convention Motor & Generator
Test P, Pf, U, N
Positioning of the test “Working point – Sine wave – Motor & Generator– P, Pf, U, N

Unser inputs

The four main user input parameters are output power / apparent power, power factor lead/lag, speed and line-line voltage. In addition, the temperatures of the windings must be set.

Main outputs and results

Test results are illustrated with data, graphs, and tables.

  1. Machine performance – Base speed point
    • General data
    • Machine constants
    • Power balance
    • Flux in airgap
    • Flux density in iron
  2. Ripple mechanical torque - working point
Curves
  1. Ripple mechanical torque versus rotor angular position
  2. Flux density in airgap versus rotor angular position

Graphics with isovalues