modelD2

Electrical leaking diode of the Modelica bond graph library

Extends from Interfaces.PassiveOnePort (Partial model invoking one bondgraphic connector).

Information

The ideal diode element is a passive OnePort element. It inherits the effort and flow variables from the passive OnePort. The leaking diode is a switch element with internal modulation. If the modulating signal has a value of true, the diode is considered blocking.

Diodes are switching elements that are primarily being used in electrical circuits, although nothing prevents them from being used also in other energy domains. Leaking diodes are a special class of non-linear resistors.

The causality of the leaking diode element is free.

Potential variables:

 e:         Bondgraphic effort variable

 f:         Bondgraphic flow variable, normalized positive for flows into the model

 blocking:  Boolean variable denoting the switch position (internal modulation signal)

 s:         Curve parameter


Parameters:

 Ron:       Leakage resistance in conducting state (default value = 1e-5 Ohm)

 Goff:      Leakage conductance in blocking state (default value = 1e-5 Mho)

 e0:        Forward threshold effort (default value = 0 Volt)

Equations:

blocking = s < 0
f = s*(if blocking then Goff else 1) + Goff*e0
e = s*(if blocking then 1 else Ron) + e0

References:

Otter, M., H. Elmqvist, and S.E. Mattsson (1999), "Hybrid Modeling in Modelica Based on the Synchronous Data Flow Principle," Proc. CACSD'99, IEEE Symposium on Computer-Aided Control System Design, Hawaii, August 22-27, 1999, pp. 151-157.

Parameters

Type	Name	Default	Description
Real	Ron	1E-5	Leakage Resistance
Real	Goff	1E-5	Leakage Conductance
Real	e0	0	Forward threshold effort

Connectors

Type	Name	Default	Description
BondLib.Interfaces.BondCon	BondCon1 (from PassiveOnePort)		Bond graph connector

Components

Type	Name	Description
Real	e (from PassiveOnePort)	Bondgraphic effort
Real	f (from PassiveOnePort)	Bondgraphic flow
Real	s	Curve parameter
Boolean	blocking