Staff Profile

Areas of expertise: PEMD, Electronics and Electrical Engineering, Manufacturing Processes, Product Design, ASIC/FPGA Design and Embedded Software Design

Deepak is a Senior Lecturer with a more than 20yrs industry experience in PEMD, complex manufacturing processes, product design and design for manufacture. At Newcastle University, Deepak is key part of IESAM (Institute of Electrification and Sustainable Advance Manufacturing) team which offers flexible high quality training in Power Electronics, Machines and Drives (PEMD) in the North East. Before joining Newcastle University, Deepak spent many years working in the lighting industry for the world's leading provider of technology and services. He has keen interests in PEMD, Electrification, Electronics, and Sustainability.

Technical Knowhow:

PEMD

• Flyback
• Buck Converter
• Boost Converter
• LLC
• LCC
• Half-Bridge Converters
• Full-Bridge Converters
• PFC
• Machines, Drives and controls
• SEPIC...and more

Lighting

• Fluorescent Drivers (Dimmable and Non-Dimmable)
• LED Drivers (Dimmable and Non-Dimmable)
• Emergency LED Drivers
• Sensors and Controls

Energy Storage

• NiCd
• NIMH
• LiFePO4
• Super Capacitors

ASIC/FPGA Design

• Verilog, System Verilog, VHDL
• Altera/Xiinx FPGA/CPLD
• Test benches and Simulations
• Synthesis tools
• ASIC Design

Advance Modelling and Simulations

• MATLAB Simulink
• PLECS
• PSPICE and more

Design to Manufacture

• Lean Manufacturing
• AI and ML
• Digital Manufacturing

MISC

• PCB Design
• EMI
• Embedded SW Design

Deepak has more than 30+ patents from his work in Industry. Some of the patents links and descriptions are listed below.

DRIVER FOR EMERGENCY LIGHTING

• The invention relates to a driver for emergency lighting means, comprising output terminals for electrically supplying at least one emergency lighting means, and a test switch for starting a test routine controlled by a controller of the driver, wherein the driver is settable to a commissioning mode if the test switch is activated according to a predefined operation pattern defined by time durations and/or repetition criteria of the operation pattern.

A POWER SUPPLY DEVICE FOR A WIRELESS SUPPLY OF ELECTRICAL POWER

• The invention provides a power supply device for a wireless supply of electrical power to an emergency luminaire. The power supply device comprises electrical coupling means for a wireless power transfer and an electrical energy storage. The power supply device is configured for being detachably attached to the emergency luminaire. Further, the power supply device is configured to wirelessly supply electrical power from the electrical energy storage to the emergency luminaire, via a wireless transfer of the electrical power from the electrical coupling means of the power supply device to electrical coupling means of the emergency luminaire, when the power supply device is detachably attached to the emergency luminaire. In addition the invention proposes an emergency luminaire and a system comprising such a power supply device and such an emergency luminaire.

Ripple-suppressing operating device

• An operating device for at least one LED comprises first and second converters, such as flyback converters, for current supply of the at least one LED and a charge storage means for energizing the second con­verter. The first converter comprises an auxiliary winding or choke for energiz­ing the charge storage means. The second converter may be driven in antiphase with the first converter to accomplish ripple suppression in the current supplied to the at least one LED.

POWER FACTOR CORRECTION

• A power factor correction circuit includes an inductor, a diode a switch and a controller. An input voltage Vin is applied to the inductor which is cyclically discharged through the diode by the operation of the switch. The switch is controlled by the controller which varies the on period of the switch, during which the inductor is charged, for adjusting an output voltage Vbus towards a target value Vbus-target. The method includes obtaining an indication of the inductor reaching a discharged state in response to the switch being in an off state. The controller monitors at least one of the switch on period Ton and the switch off period Toff to identify when the input voltage Vin is an alternating voltage AC input, and when it is likely to be a non-alternating voltage DC input. When a non alternating voltage is detected, steps may be taken to reduce interference.

ELECTRONIC BALLAST HAVING ADAPTIVE DEAD TIME CONTROL

• An electronic ballast for a gas discharge lamp, preferably a fluorescent lamp, has a d.c. source connected to a load circuit that includes a series resonance circuit and a lamp by an inverter that has a high side switch and a low side switch in a half bridge arrangement. The switches are alternately controlled with a delay time or dead time after one of the switches is switched off and before the other is switched on. The dead time is varied by controller 1 depending on detection of a negative current in a body diode of the low side switch. The dead time can be varied between a fixed value and a maximum value, being set at the fixed value if the time between the high side switch turning off and detection of negative current in the low side switch is less than a first duration; and ended if the time period is less than a second duration. Switching of both switches can be suspended if negative current in the body diode is not detected within a time limit. Switching of the high side switch Q1 can be suspended in response to detecting a negative current in the body diode of the low side switch during the dead time after the low side switch is turned off. The current in the low side diode can be monitored by detecting a voltage across a shunt resistor R1 at the foot of the bridge