Winding
Electromagnetic transducer with ohmic and magnetic losses.
Description
The Winding block is an electromagnetic converter with winding resistance and dissipation flux. This block can be used as a basic component to create transformers.
When a positive current is passed through the electrical ports of the block, a positive magnetomotive force (MDF) is induced at the magnetic terminals.
The block is based on the following equations:
,
where:
-
- magnetomotive force (MDF) at the magnetic ports, A.
-
- number of winding turns.
-
- current through the winding, A.
When a positive time-varying flux is applied through the magnetic ports of the unit, a negative voltage is induced at the electrical terminals of the unit.
,
where:
-
- flux through magnetic ports, Vb.
-
- current through the electrical ports, A.
-
- dissipation resistance, 1/Gn.
-
- winding resistance, Ohm.
-
- voltage drop across the electrical terminals of the unit, V.
-
- modelling time, s.
In this block it is optionally possible to activate the H port to account for thermal phenomena occurring in the winding (e.g. change of active resistance, reception/transfer of thermal energy to other blocks).
Ports
Non-directional
N - north terminal
`magnetism
Magnetic port corresponding to the north terminal of the unit.
S is the south terminal
magnetism
Magnetic port corresponding to the south terminal of the unit.
+ - positive
electricity
The electrical port corresponding to the positive terminal of the unit.
- - negative
electricity
The electrical port corresponding to the negative terminal of the unit.
H - H port
heat
Heat port.
Dependencies
To activate it, tick the checkbox for Thermal port.
Parameters
Number of winding turns - number of winding turns
10 (By default)
Number of winding turns.
Winding resistance, Ohm - series resistance
1e-3 Ohm (by default) | positive number.
Power loss in the winding.
Leakage reluctance, 1/H - dissipation flux resistance
1e5 1/GN (by default) | non-negative number.
Magnetic flux loss in the winding. If you do not want to model the leakage inside the Winding block, set this parameter to inf.
Parallel conductance, 1/Ohm - parallel conductance
0 (By default) | non-negative number.
Parallel conductance. Some circuit modelling may require a small parallel conductance.
Thermal port - visibility of the thermal port
Disabled (by default) | On
Select the checkbox to enable the thermal port.
The thermal port affects the winding resistance losses.
Resistance temperature coefficient, 1/K - resistance temperature coefficient
0.00393 1/K (by default).
The coefficient α in the equation relating resistance to temperature. By default, the value for copper is used.
Dependencies
To use this parameter, select the Thermal port checkbox.
Measurement temperature, K - reference temperature
`298.15 K (by default).
The temperature for which the winding parameters are given.
Dependencies
To use this parameter, select the Thermal port check box.
Winding Thermal mass, J/K - winding thermal mass
100 J/K (by default).
The value of thermal mass for the winding. Thermal mass is the energy required to raise the temperature by one degree.
Dependencies
To use this parameter, select the checkbox for Thermal port.