Case Study - BLDC Motor Drive (Inverter)

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.

• 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

• 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

• 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

• 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