Floating Neutral (Three-Phase)
R2026bInternal floating neutral point for wye-connected network
Floating Neutral (Three-Phase) block
To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.
Libraries:
Simscape /
Electrical /
Connectors & References
Description
The Floating Neutral (Three-Phase) block connects the individual phases of a three-phase system to form a floating neutral point.
Note
To create a neutral point that you can connect to blocks with single-phase ports, use the Neutral Port (Three-Phase) block. To create a neutral point that is connected to ground, use the Grounded Neutral (Three-Phase) block.
Examples
Earthing Effects with Unbalanced Load
The effects of three different types of earthing connections on network voltages and currents.
Control Speed of Induction Machine with Direct Torque Control Method
Control an asynchronous machine (ASM) using the direct-torque control method. A PI-based speed controller supplies the torque reference. The direct-torque controller generates the inverter pulses.
Asynchronous Machine Scalar Control
Control the rotor speed in an asynchronous machine (ASM) drive using the scalar V/f control method. The converter transforms a reference speed to a reference electrical frequency. The controller generates reference voltages from the reference frequency by maintaining a constant voltage-to-frequency ratio through scalar V/f control.
Electric Engine Dyno
Model an electric vehicle dynamometer test. The test environment contains an asynchronous machine (ASM) and an interior permanent magnet synchronous machine (IPMSM) connected back-to-back through a mechanical shaft. Both machines are fed by high-voltage batteries through controlled three-phase converters. The 164 kW ASM produces the load torque. The 35 kW IPMSM is the electric machine under test. The Control Machine Under Test (IPMSM) subsystem controls the torque of the IPMSM. The controller includes a multi-rate PI-based control structure. The rate of the open-loop torque control is slower than the rate of the closed-loop current control. The task scheduling for the controller is implemented as a Stateflow® state machine. The Control Load Machine (ASM) subsystem uses a single rate to control the speed of the ASM. The Visualization subsystem contains scopes that allow you to see the simulation results.
Ports
Conserving
Parameters
Programmatic Use: Add Block
To add the block programmatically, use the add_block function with one of these library block paths as the source.
"ee_lib/Connectors & References/Floating Neutral (Three-Phase)"
Example: add_block("ee_lib/Connectors & References/Floating Neutral (Three-Phase)","myModel/myBlock",MakeNameUnique="on")
For information about programmatic access to individual block parameters, see the Programmatic Use section of parameter descriptions on this page.
