Machine Models

This table lists all of the machine models available in PSIM with a brief description of important details. It is meant to provide a quick overview of what you can do. For a more thorough explanation of each model and the full set of parameters please have a look at the PSIM user manual or the “help” for each element in PSIM. Very few of these models are compatible with DSIM, if a model is compatible with DSIM it will be explicitly stated in the notes.

Element	Name	Notes
	Squirrel Cage Induction Machine	This is an induction machine model that assumes symmetry in the drive waveform. The stator windings are wye configured, it is appropriate for most simulations and is computationally faster than the general model with an unconnected stator below. This model is not appropriate for fault current studies. The user parameters are referred to the stator side: Rs, Ls, Rr, Lr, and Lm. Mechanical parameters of inertia poles are also defined.
	Squirrel Cage Induction Machine (neutral)	This model is the same as the above, but the neutral point is brought out for you to connect to.
	Squirrel Cage Induction Machine (linear)	This is an induction machine model that DOES NOT assume symmetry in the drive waveform. The stator windings are not connected and can be configured in any way by the user. This model can be used to study fault currents or abnormal drive conditions such as in-phase drive currents and open windings. This model is slower computationally than the motor that assumes symmetry. The user parameters are referred to the stator side: Rs, Ls, Rr, Lr, and Lm. Mechanical parameters of inertia poles are also defined.
	Squirrel Cage Induction Machine (high frequency)	This induction machine model assumes symmetry in the drive waveforms, just like the basic induction machine model above. In addition to the regular motor parameters, Rs, Ls, etc. the user can define the high-frequency input impedance characteristics: coupling to ground and skin effect. These parameters are required to provide the proper termination impedance when a “long cable” is used between the drive and the motor when studying transient ringing and high-frequency interactions between inverter, cable, and motor.
	Squirrel Cage Induction Machine (nonlinear)	This motor is the same as the general model above that DOES NOT assume symmetry on the input. This motor has a lookup table defining Lm as a function of Im, which allows for saturation to be modeled.
	Squirrel Cage Induction Machine (with load)	This model includes the induction machine which assumes symmetry combined with a mechanical load in the same element. This model is the only induction machine model compatible with DSIM. It is also compatible with PSIM.
	Wound Rotor Induction Machine	Similar to the stator only induction machine model above. This induction machine model has the rotor windings exposed along with the stator windings and with the neutral point for both. Symmetry and a wye connection are assumed, so it is not appropriate for fault or abnormal operating condition simulations.
	Wound Rotor Induction Machine (linear)	This induction machine model has the rotor winding exposed and does not assume symmetry. Similar to the “Stator” with open winding above, it can be used for abnormal operating conditions and fault simulations.
	Wound Rotor Induction Machine (nonlinear)	This induction machine is the same as the motor above with open stator and rotor windings and you are able to define a lookup table for Lm as a function of Im so that saturation can be simulated.
	DC Machine	A brushed DC machine model with field winding.
	Brushless DC Machine	A 3-phase permanent magnet brushless DC model (BLDC) with trapezoidal EMF. The parameters are defined with Rs as well as self and mutual inductance values. Which differs from the “datasheet” BLDC model below.
	Brushless DC Machine (datasheet)	A similar model to the BLDC above but the parameters used to define it are in phase to phase quantities and are typical of some datasheets.
	PMSM	This is a permanent magnet synchronous machine (PMSM) model with sinusoidal back EMF. This model is in the dq reference frame, setting Ld = Lq would be an SPM configuration, surface magnets, and setting Ld and Lq to different values would be an IPM. Developed torque considers the Ld-Lq relationship with Id & Iq so the Max Torque Per Ampere operating point for an IPM drive can be used. The stator windings are wye connected and an open-winding model is available. Contact support for details. This model is defined with current sources and should be connected to an inverter or voltage source. It can be used for motoring or generating as an active rectifier. The (V) model below has voltage sources as the interface. If you are unsure of which model to use, use this one.
	PMSM (V)	This is a permanent magnet synchronous machine (PMSM) model with sinusoidal back EMF. This model is in the dq reference frame, setting Ld = Lq would be an SPM configuration, surface magnets, and setting Ld and Lq to different values would be an IPM. Developed torque considers the Ld-Lq relationship with Id & Iq so the Max Torque Per Ampere operating point for an IPM drive can be used. This model is defined with Voltage sources and is appropriate to model as a standalone generator, this differs from the current interface model above. If you are in doubt of which model to use, use the current model above, not this one.
	PMSM (nonlinear)	This is a permanent magnet synchronous machine (PMSM) model with sinusoidal back EMF. This model is in the dq reference and differs from the other PMSM models as Ld and Lq can be defined as functions of Id and Iq to model magnet saturation. This model is defined with current sources and should be connected to an inverter or voltage source. It can be used for motoring or generating as an active rectifier.
	PMSM (spatial harmonics)	This is a permanent magnet synchronous machine (PMSM) model with sinusoidal back EMF in the dq reference frame similar to the other PMSM models above. However, this model allows for the harmonic content to be included in the back EMF, drive current, and developed torque that results from the internal configuration of the magnetics, the spatial harmonics. This model will provide comparable accuracy to an FEA co-simulation.
	PMSM (high frequency)	This is a permanent magnet synchronous machine (PMSM) model with sinusoidal back EMF in the dq reference frame, similar to the other PMSM models above. However, this model allows to include parasitic values for the user to define differential and common mode coupling elements. These elements are required to provide the proper termination impedance when a long cable is placed between the inverter and the motor to study reflected waves and EMI in motor drives.
	PMSM (with load)	This is a permanent magnet synchronous machine (PMSM) model with sinusoidal back EMF in the dq reference frame with an integrated mechanical load. This is the only PMSM model that is compatible with a DSIM simulation. It can also be used in a PSIM simulation.
	6-ph PMSM	This is a 6-phase permanent magnet synchronous machine (PMSM) model which is essentially two wye connected three-phase windings offset by 30°. It is modeled with current sources but is otherwise similar to the linear PMSM model above.
	6-ph PMSM	This is a 6-phase permanent magnet synchronous machine with sinusoidal back EMF (current-type interface), with zero phase shift between the two sets of 3-phase windings.
	Synchronous Machine	This is a synchronous machine (SM) model with external field winding in the dq reference frame. This model is similar to the SM model below but it is modeled with voltage sources. A voltage source model means it should not be directly connected to voltage sources on the terminals.
	Synchronous Machine (I)	This is a synchronous machine (SM) model with external field winding in the dq reference frame. This model is similar to the SM model above but it is modeled with current sources. A current source model means it should not be directly connected to current sources on the terminals.
	Synchronous Machine (with load)	This is a synchronous machine (SM) model with external field winding in the dq reference frame with an integrated mechanical load. This is the only synchronous machine model that is compatible with DSIM, it can also be used with PSIM.
	3-ph SRM	This is a 3-phase switched reluctance motor (SRM) model.
	3-ph SRM (nonlinear)	This is a 3-phase switched reluctance motor (SRM) model. This model has a lookup table for flux and torque as functions of rotor angle.
	4-ph SRM	This is a 4-phase switched reluctance motor (SRM) model.
	4-ph SRM (nonlinear)	This is a 4-phase switched reluctance motor (SRM) model. This model has a lookup table for flux and torque as functions of rotor angle.
	5-ph SRM	This is a 5-phase switched reluctance motor (SRM) model.
	5-ph SRM (nonlinear)	This is a 5-phase switched reluctance motor (SRM) model. This model has a lookup table for flux and torque as functions of rotor angle.

The full list of supported machine models in PSIM