MATLAB: What was the process adopted for deriving the preset model parameters for the asynchronous machine blocks in SimPowerSystems

Question

I wish to have information about the preset models in the asynchronous machine blocks in SimPowerSystem and the process adopted in deriving the default loss parameters of these preset models .

Answer 1

The SimPowerSystems Asynchronous Machine block includes 21 preset models. Each preset model provides a set of predetermined electrical and mechanical parameters for various asynchronous machine ratings of power (HP), phase-to-phase voltage (V), frequency (Hz), and rated speed (rpm).

The Asynchronous Machine block also has multiple parameters, three of which are the loss parameters: Stator Resistance, Rotor Resistance, Friction Factor. The user can choose to set all of the parameters themselves or they can use one of 21 preset models to do so. When the user selects one of those models in the block mask, the mask updates all of the parameters. The user can see the parameters if they check “Show detailed parameters”.

For example, one of the preset models is a 20HP 575V 60Hz 1765RPM machine. It sets 0.454 Ohms for the stator resistance, 0.2938 Ohms for the Rotor resistance, and 0.008209 for the Friction Factor. Other preset models have different parameters.

The parameters in each of the preset models were populated based on tests conducted on actual asynchronous machines (at IREQ or ETS). Some of them also used data from manufacturers, like Baldor, for deriving these values.