DQ0 Components
R2026bModel electrical systems in the rotating direct (D), quadrature (Q), and zero‑sequence (0) reference frame. Using DQ0‑based representations enables simplified analysis and control design for balanced and unbalanced three‑phase systems, particularly in applications involving synchronous machines, power electronics, and control loops.
When connecting DQ0 ports to components operating
in traditional abc coordinates, use the appropriate
transformations to maintain physical consistency.
Simscape Blocks
 | Converter (Three-Phase, DQ0) | Three-phase bidirectional AC/DC converter in direct-quadrature-zero reference frame (Since R2026b) |
 | Hybrid Excitation PMSM (DQ0) | Direct-quadrature-zero representation of hybrid-excitation synchronous machine with three-phase wye-wound stator (Since R2026b) |
 | PMSM (DQ0) | Direct-quadrature-zero representation of permanent magnet synchronous machine (Since R2024b) |
 | Dynamic Load (Three-Phase, DQ0) | Balanced three-phase dynamic load in direct-quadrature-zero reference frame (Since R2026b) |
Featured Examples
Simulate PMSM Drive with Thermal Model in DQ Frame
Simulate a permanent magnet synchronous machine (PMSM) in the direct-quadrature (DQ) reference frame. The PMSM contains a thermal model and empirical iron losses. To design the PMSM controller and achieve the desired performance, select the architecture and the gains for the model. The initial temperature of the stator and rotor is 25 degrees Celsius. The ambient temperature is 27 degrees Celsius. The Scopes subsystem contains scopes that allow you to see the simulation results.
Control and Simulate Torque of IPMSM in DQ Frame
Control the torque in an automotive electrical traction drive of an interior permanent magnet synchronous machine (IPMSM). The example controls and simulates the torque in the rotor direct-quadrature (DQ) reference frame. You can use the DQ reference frame to design the controller and to speed up the simulation. The IPMSM operates in both motoring and generating modes according to the load. An ideal angular velocity source provides the load. The Control subsystem uses an open-loop approach to control the IPMSM torque and a closed-loop approach to control the current. The control algorithm converts the torque request to the relevant current references. The reference DQ voltages feed the IPMSM. The simulation involves several torque steps in both motor and generator modes.
Control Torque of IPMSM Inside Axle-Drive EV in DQ Frame
Models an interior permanent magnet synchronous machine (IPMSM) propelling a simplified axle-drive electric vehicle. The example controls and simulates the torque in the rotor direct-quadrature (DQ) reference frame. The IPMSM operates in both motoring and generating modes. A fixed-ratio gear-reduction model implements the vehicle transmission and differential. The Vehicle Controller subsystem converts the driver inputs into a relevant torque command. The Drive Controller subsystem controls the torque of the IPMSM. The control algorithm is implemented in continuous time. To simulate this model faster, this example uses a variable-step solver. The Scopes subsystem contains scopes that allow you to see the simulation results.
Control Torque of IPMSM Inside Parallel HEV in DQ Frame
Models a simplified parallel hybrid electric vehicle (HEV). An interior permanent magnet synchronous machine (IPMSM) and an internal combustion engine (ICE) provide the vehicle propulsion. This example controls and simulates the torque in the rotor direct-quadrature (DQ) reference frame. The IPMSM operates in both motoring and generating modes. A fixed-ratio gear-reduction model implements the vehicle transmission and differential. The Vehicle Controller subsystem converts the driver inputs into torque commands. A Stateflow® chart implements the vehicle control strategy. The ICE Controller subsystem controls the torque of the combustion engine. The EM Controller subsystem controls the torque of the IPMSM. To simulate this model faster, this example uses a variable-step solver. The Scopes subsystem contains scopes that allow you to see the simulation results.
