Electromagnetic Converter

R2026b

Lossless electromagnetic energy conversion device

Libraries:
Simscape / Foundation Library / Magnetic / Magnetic Elements

Description

The Electromagnetic Converter block provides a generic interface between the electrical and magnetic domains. Electromagnetic energy conversion is lossless.

The block uses the equations

$M M F = N \cdot I$

$V = - N \cdot \frac{d Φ}{d t}$

where:

MMF is the magnetomotive force (mmf) across the component.
Φ is the flux through the component.
I is the current through the electrical ports.
V is the voltage across the electrical ports.
N is the number of electrical winding turns.
t is simulation time.

Connections N and S are magnetic conserving ports, and connections + and - are electrical conserving ports. If the current from the electrical + to the - port is positive, then the resulting mmf is positive acting across the magnetic N to S ports. A positive rate of change of flux flowing from N to S results in a negative induced voltage across the + and - ports.

Variables

To set the priority and initial target values for the block variables prior to simulation, use the Initial Targets section in the block dialog box or Property Inspector. For more information, see Set Priority and Initial Target for Block Variables.

Nominal values provide a way to specify the expected magnitude of a variable in a model. Using system scaling based on nominal values increases the simulation robustness. Nominal values can come from different sources, one of which is the Nominal Values section in the block dialog box or Property Inspector. For more information, see Modify Nominal Values for a Block Variable.

Examples

Solenoid with Magnetic Blocks

Model a solenoid with spring return. When unpowered, the spring pulls the plunger +5mm away from the center of the coil. Turning on the power supply at t=0.1 seconds pulls the plunger into the center of the coil. At t=0.3s, a 10N external load is added to the plunger.

Open Model

Electrical Transformer

Model a transformer using fundamental magnetic library blocks. The transformer is rated 50W, 60 Hz, 120V/12V and assumed to have an efficiency of 94%, no-load magnetizing current of 1% and a leakage reactance of 2.3%. Core losses are not modeled and the core material B-H characteristic is assumed to be linear.

Open Model

Model Oscillation Sensor Using Permanent Magnet Block

Model an oscillation sensor using the Permanent Magnet block. The sensor consists of a magnetic core with a permanent magnet that generates a magnetic field, a ferromagnetic plate attached to the core, and a conducting winding around the core.

Open Model

Ports

Conserving

expand all

N — North terminal
magnetic

Magnetic conserving port associated with the north terminal.

Programmatic Use

Port: N

S — South terminal
magnetic

Magnetic conserving port associated with the south terminal.

Programmatic Use

Port: S

+ — Positive terminal
electrical

Electrical conserving port associated with the positive electrical terminal.

Programmatic Use

Port: p

- — Negative terminal
electrical

Electrical conserving port associated with the negative electrical terminal.

Programmatic Use

Port: n

Parameters

expand all

Number of winding turns — Number of electrical winding turns
`1` (default) | positive scalar

Number of electrical winding turns.

Programmatic Use

Parameter: Nw

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"fl_lib/Magnetic/Magnetic Elements/Electromagnetic Converter"

Example: add_block("fl_lib/Magnetic/Magnetic Elements/Electromagnetic Converter","myModel/myBlock",MakeNameUnique="on")

For information about programmatic access to individual block parameters, see the Programmatic Use section of parameter descriptions on this page.

Electromagnetic Converter