technologies
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Battery management systems (BMS)
I specialise in the application of both lead-acid and lithium ion battery systems. BMS's carry out the following functions:
- preserve battery integrity
- protect users & systems from the consequences of abuse
- prevent operation outside of the battery's capabilities
- prioritise resources; consumers, power sources, energy storage
- provide status information to the user
- interchange data with other systems
- many microcontroller based
typical system parameters: 12V & 24V, 100Ahr to 600A-hr capacity, up to 300 amps.
DC-DC power conversion
I have conceived & designed a large range of specialised DC-DC converters:
- single & bi-directional
- up convert, down convert, line stabilisation
- battery equalisation
- battery charging; lead-acid, nickel metal-hydride, lithium ion
- regulated DC supplies
- many with microcontroller based housekeeping
typical system parameters: 12V, 24V, up to 60 amps, 1kW.
DC-AC power conversion
I have conceived & designed a large range of both standard & specialised DC-AC inverters:
- pure sine wave, switch mode
- quasi-sine wave, switch mode
- single phase, three phase
- including soft start for powering motors
- for use on vehicles, including electric vehicles, railways, military aircraft
typical system parameters: voltages from 12VDC to 96VDC, 110 & 230VAC output, 50, 60 & 400Hz, up to 6kW
AC-DC power conversion:
Design of AC switch-mode power converters for:
- multi-output supplies for host equipment
- battery charging; lead acid, nickel metal-hydride, lithium ion
- single phase, three phase
typical system parameters: 110, 230 & 400VAC, up to 400VDC, up to 1kW
Uninterruptible power supplies:
Design of UPS's:
- 230VAC to 230VAC pure sine on-line switch mode (with patent)
- 230VAC to 400VDC on-line switch mode
- 24VDC to 24VDC, 300 amps
Telecommunications equipment:
Design of:
- Telephones
- Facsimile machines
- Modems
- Printers
- Data terminal equipment
Radio communications equipment:
Design of radio frequency transmitters & receivers:
- voice
- voice & video
- FM & VSB
- HF, VHF, UHF & microwave