Electrical

From small-scale hand-held electronics to large-scale structural steel elements, Xi's design team have experience in developing designs from one-off prototypes to full manufacture at all scales.

At a design support level Xi Engineering can verify existing designs and specifications to confirm a design’s suitability and offer recommendations where enhancements could be made.

The impedance change caused by fingers placed on a capacitive touchscreen needs to be evaluated to determine if sensing electronics can detect them. Motors for washing machines must deliver enough torque without exceeding thermal limits or vibrating excessively. The impedance and lobe pattern of antennas used for Wi-Fi and Bluetooth devices requires consideration to maximise their range and optimise drive circuitry. Electrical insulation is often required to prevent the risk of breakdown or shock, requiring detailed analysis of electric field concentrations.

All the examples described involve the analysis of electromagnetic fields and the potential need for coupling to other physical domains such as solid mechanics or fluid dynamics. COMSOL Multiphysics  is the principal modelling package used by Xi, for which Xi are certified consultants and recognised internationally. It provides the ability to simulate electric and magnetic fields in static and dynamic situations, both uncoupled and fully coupled to other physical domains. By using Finite Element Analysis (FEA) Xi can accurately model your device and explore design parameters, reducing the cost and time associated with prototyping. Our team of electrical and mechanical engineers can assist you across a wide range of applications.

The development of high quality headphones based on the single-sided electrostatic actuation of an ultra-thin diaphragm is one example of Xi’s experience in consumer products. Their device operated by applying voltage between a tensioned diaphragm and a wire mesh ground plane. The speaker included many design elements that affect the acoustic performance including the AC and DC voltages, pre-tensioning and overall geometry.  Simulations helped the client reduce the time and cost associated with prototyping. The client was also able to use simulations to quickly assess changes due to unforeseen supply line challenges, allowing the design to evolve without halting the mass production phase of roll-out.

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