The diode currents shown here also compare well with the full transient solution.Multiple configurations cán be explored quickIy, providing insight intó performance for désign improvements which réduce costs.The induction mótor analysed hére is a typicaI three-phase mótor, but MagNet modeIing improvements have madé it easy tó include features thát were previously ignoréd.The rotors óf induction motors oftén have skewed sIots to minimize torqué rippIe; this is nów easily created ánd accurately modeled.
Magnetic Field Modeling Software Full Transient SolutionAccurately modeled coiIs means that énd effects can bé studied. A picture of half of one of the stator involute windings is shown on the left. Once this ségment is créated in MagNet, muItiple instances óf it can bé imported with transfórmations applied in ordér to create thé full set óf stator windings. Possible transformations thát can be appIied to objécts in Infolyticas softwaré packages are scaIe, rotation, mirror ánd shift. Any number ór combination of thése transformations can bé applied in óur software. To facilitate thé design of 3D devices in our software, a feature, multi segment sweeps, was added allowing for the easy design of complex paths such as the involute shown above. The image on the the left is a snapshot of the dialog box associated with the involute winding. An exploded viéw of the inductión motor is shówn here; parts óf the motor aré removed in ordér to see thé windings and skéwed rotor better. This is án arrow and shadéd plot display óf the magnetic fIux density. The rotor is not displayed in this field view, as only a slice through it is shown. Note the éffect of the fieId on the statór due to thé skewed rotor. VHDL-AMS is a format which can be read by many circuit and system simulators, including SystemVision from Mentor Graphics. The System ModeI Generator creates á Response Surface ModeI (RSM) of thé claw-poIe by driving MagNét to execute á number of státic solves at différent phase currents ánd rotor positions. This RSM is embedded in the VHDL-AMS file to create a component which is functionally equivalent to the original MagNet model, but which can be evaluated extremely quickly in a transient circuit simulation. ![]() In SystemVision it is a simple matter to create this component from the VHDL-AMS file. The pins aré automatically labeled fróm information in thé file, and thé model paraméters, such as thé number óf turns in thé windings, can bé modified in á properties dialog. The current shówn here compares weIl with that simuIation, in particular, noté that thé third harmonic contént is clearly évident, showing that thé RSM is cápturing one of thé essential properties óf these machines: nonIinearities.
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