The design of motor inverters and control for brushless DC, servo and stepper motors;
The design of heater control hardware and associated protection systems;
Ensuring designs can comply with relevant EMC/EMI standards and modifying design where needed to ensure this is the case;
Thermal management design of power electronics systems;
Design of both mains and battery powered electronics to meet global requirements;
Working with different product teams to gain an in depth product understanding, while using knowledge of the latest technologies to create innovative power electronics systems and solutions;
Research into new technology and investigating ways of incorporating this technology into future products;
Use of simulation and PCB design software to create prototypes;
Strong lab skills to build and test prototypes with minimal supervision.
As a Lead Engineer, the successful applicant will be expected to:
Develop the concept, proving key technologies and demonstrating the system feasibility;
Produce clear, well written documentation prior to handover to the development teams;
Take technical responsibility for motor drive, heater control and associated power electronics content of a project. This may expand to the responsibility for multiple small concurrent projects, supported by a number of team members;
Demonstrate designs are safe, robust, cost effective and fit for purpose for a high volume manufacture environment, through detailed laboratory testing, simulation and analysis;
Assist in the personal development of junior team members.
Education and experience:
Minimum BEng/MEng degree in Electrical & Electronic Engineering or other relevant discipline.
Minimum technical knowledge:
Experience in motor inverter design and motor control, particularly brushless DC motors, servo or stepper motors;
Knowledge of heater control hardware, control schemes and heater protection approaches desirable;
General knowledge of power electronic devices, including silicon based IGBTs, MOSFETs and wide bandgap technologies;
Understanding of device characteristics and issues with switching behaviour in real circuits, as well as power switch driver design;
Device selection - Interpretation of datasheets and knowledge of design methods to confidently select the lowest cost devices while achieving reliability targets;
Knowledge and experience of using power hybrid modules and power SoC modules (e.g. drivers and power switches in one device);
Thermal management approaches for surface mount and through hole devices;
SMPS and linear regulator power supply design;
Design of power electronics for both low voltage and mains voltage systems.
Control circuit design:
Understanding of techniques for accurately monitoring small signals in high power, electrically noisy environments;
Excellent knowledge of analogue signal conditioning (e.g. op-amp circuit design) and ideally digital signal processing approaches.
Schematic capture using Altium Designer, Mentor Graphics or other main stream tools;
Use of SPICE based simulation tools such as Simetrix and LTspice;
Design calculation tools such as Mathcad, Matlab, Excel.
Circuit simulation and tolerance analysis;
Robust design including FMEA techniques;
Good quality engineering process understanding and appreciation;
Design for high volume manufacture;
PCB layout - size/cost minimisation while achieving layouts for inherently good EMC compliance and thermal design.
Essential behavioural skills:
The ability to take a leadership position within a project;
Good analytical ability and attention to detail;
Ability to communicate appropriate, concise and accurate information in written and verbal format to engineers and up to executive level;
Ability to adapt or generate imaginative and innovative ideas, in line with core Dyson values;
Ability to multi-task and plan effectively when working with a variety of project teams;
Excellent time management skills and ability to prioritise tasks;
Excellent team working skills.
Essential practical skills:
Ability to build, test and modify prototypes accurately, safely and with minimal supervision.
Additional experience that is desirable:
Experience with Flowtherm or similar thermal modelling packages.