electrical machine and drives group - smmt · electrical machine and drives group ... •encompass...
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The Electrical Machines & Drives Research Group
The University of Sheffield, UK
Electrical Machine and Drives Group
Automotive Renewable Energy Aerospace
Industrial Marine Consumer Product
• Encompass most facets of electrical machines and drive systems (power electronics, electromagnetic
devices, electrical systems and control systems)
• Strong industrial collaboration, particularly in automotive and aerospace sectors
• Capability for producing and testing demonstrator systems
• Applications embrace different market sectors
The Electrical Machines & Drives Research Group
The University of Sheffield, UK
Prototype 125,000rpm motor
Modal analysis
• PM brushless ac/dc
• Switched reluctance
• Linear machines
• High-speed machines
• Low-speed direct-drive machines
• Halbach magnetised machines
• Fault-tolerant machines
• Flux-switching machines
• High temperature machines
• Computer-aided design
• Acoustic noise and vibration
• Loss calculation
(e.g. iron loss,
aerodynamic loss)
Electrical Machines Research
The Electrical Machines & Drives Research Group
The University of Sheffield, UK
Power Electronics Research
• Drive circuit topologies
• PWM strategies
• EMC
• Induction heating
• Resonant link converters
• Matrix converters
• Multi-level inverters
• Active rectification
• Losses in devices
• Power integrated modules
3rd-order resonant LCC converter
200kHz, 2.5kW
modular power
supply for induction
heatingIntegrated power silicon
phase leg module with
direct copper bonded
substrate
Thermal resistance
0.122°C/W (cf. 0.29 °C/W
for Fuji module)
Matrix converter test bench
The Electrical Machines & Drives Research Group
The University of Sheffield, UK
Batteries
Flywheels
Supercapacitors
- 36V, VRLA battery pack based on Hawker Cyclon
cylindrical cell
- SOC, voltage, temperature monitored continuously
- cells conditioned as required and faulty cells bypassed
automatically
- For peak power buffer
- 60krpm 30krpm
- ~300Wh recoverable energy
- ~30kWCarbon fibre composite rim
- For peak power buffer
- Connected directly to dc link, whose voltage
varies by ~2:1
Energy Storage Technologies