The Manufacturers of one of India’s widest range of air conditioning and commercial refrigeration products as well as a comprehensive
range of air purifiers, water purifiers, air coolers, cold storages and specialty products.
THE PROBLEM
There was room for improvement of efficiency, and to reduce overall power consumption
Upon start, a high current was able to cause damage to other devices, and cause light flickering which had to be controlled
There was a long delay between start up and achievement of desired cooling
THE ANALYSIS
Better compressor technology had to be incorporated
Slower ramp up and ramp down of compressor was needed
Larger input voltage range had to be accommodated to counter the effect of inconsistent power input
THE SOLUTION
Incorporated a variable speed BLDC motor compressor
Drive converted to constant voltage, variable frequency
Allow compressor to run near peak rated speed
Incorporated an active Power Factor Correction (PFC) circuit at the mains input stage
BLDC Motor Driver with power & Control card (single card)
Firmware logic design for BLDC Motor drive as well as air conditioning application
EMS vendor identification for manufacturing of PCB assemblies
THE OUTCOME
Power consumption reduced by 30%
Starting surge current substantially reduced
Wide mains input voltage range supported
Lesser time to achieve desired cooling effect
This generic Inverter can be tailored for various applications
Technology Areas
BLDC Motor Control
Active PFC
Power Electronics
TECHNICAL DETAILS
Hardware
Single board solution – double sided PTH
Schematics, BOM, Layout & Gerber: PADS from Mentor Graphics