MODELLING AND SIMULATION OF THE POSSIBLE EM RADIATION OF THE POWER SUPPLY TOWARDS THE SYNCHRONIZED AND BLDC MOTORS

Josef Blažek

   The contribution examines questions of the possible radiation of electromagnetic energy from the power wires of various types of electric motors. The emphasis is put on the modelling, simulation and analysis of the possible wires radiation which is supplied by the power modern BLDC motor and synchronized motor with permanent magnets. The QuickField software was used for the examination of the electromagnetic energy radiation and deployment of the magnetic fields in the close zone of the wires, this software enables to connect modelling of electric circuit with the modelling of space deployment of the electromag-netic fields of the selected parts of the solved electric circuit. There were examined more variants of power supply with wires in different geometrical arrangement such as symmetric or asymmetric, spatial or linear. The results of modelling and simulations are described in the contribution. The assumptions have been confirmed, it means that relatively small areas arisen between wires, for example near connectors or looser local arrangement of connected wires are becoming the radiator due to relatively high power supply as well as their frequency (PWM regulation approximately 8 - 32 kHz. In the near future, we are going to focus on the real measurements and the possibilities of detection of the given radiation sources.

Keywords: BLDC motor, electromagnetic field, wire of electric supply, modelling and simulation

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