# Electric field and electrostatic simulation software

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## Calculate the electric and electrostatic field and voltage breakdown

The electrostatic module of EMS calculates the electric and electrostatic field, voltage breakdown, electric and electrostatic force for insulators, high voltage components, transformers, and more. The electrostatic approximation rests on the assumption that the electric field is irrotational, i.e. the curl of the electric field is null. From Faraday's law, this assumption implies the absence or near-absence of time-varying magnetic fields, i.e. the derivative of the magnetic field with respect to time is also null. In other words, electrostatics does not require the absence of magnetic fields or electric currents. Rather, if magnetic fields or electric currents do exist, they must not change with time, or in the worst-case, they must change with time only very slowly. In some problems, both electrostatics and magnetostatics may be required for accurate predictions, but the coupling between the two can still be ignored.

## Calculate electrostatic force and study insulators

The Electrostatic module can help you study many devices and address numerous insulating and conducting phenomena. Below is just a partial list:

• Avoid rapid reduction in the resistance of an electrical insulator, that can lead to a spark jumping around or through the insulator, i.e. dielectric breakdown. This phenomenon is common in high voltage and high-power applications.
• Avoid the ionization of a fluid surrounding a conductor, i.e. corona effect, in some applications such as power transmission equipment, transformers, capacitors, electric motors and generators.
• Produce corona in some other applications such as the manufacturing of ozone, scrubbing particles from air in applications such as air-conditioning systems, in nitrogen laser, when removing the unwanted electric charges from the surface of aircraft in flight, and in electrostatic copying.
• Assure that a high voltage machine is properly grounded.
• Reduce the electrostatic discharge in PCB and electronic designs.
• Assure the proper actuation force in MEMS and RF-MEMS designs.
• Avoid cross talk and distortion in electronic devices.
• Assure that a charged particle follows a desired trajectory.
• Compute the capacitance matrix, i.e. self-capacitance and mutual capacitance, for high-speed electronic circuits and interconnects.
• Compute the electric field, electric flux, and voltage in insulators and around conductors.

## Electrostatic software for all insulators

The Electrostatic module is primarily used for computing electric potential and electric field due to charges and voltages in insulators and conductors. It has many practical applications, including:

• High Voltage Components
• Insulating Systems
• EMC Compatibility
• Bus Bars
• MEMS
• Shielding
• Cables
• Switchgear
• Transformers
• Electronic tubes
• Capacitors
• Power transmission lines,
• Bushings
• PCBs

## Calculate the electric field stress, capacitance, and more

The Electrostatic module outputs the following results for each study:

• Electrostatic potential
• Electric field
• Electric stress
• Voltage breakdown
• Electric flux density
• Capacitance matrix
• Force
• Torque
• Stored energy