In 2013, the slow recovery in the face of the global economic situation, domestic macro-economic soft landing is expected to increase, created of fundamentals and constantly changing, such as the free trade zone of Shanghai, China's overall low-voltage frequency converter market rose 6%. Compared to 2012, 2013 there is a marked improvement, but the market is lower than expected. Brands growth abroad is not obvious, most remain only in the single digits, while relatively larger growth of domestic manufacturers, but the growth momentum has slowed. March 2013, foreign brands accelerated in the footsteps of the lower end of the market, while domestic firms in order to improve competitiveness and profitability, speeding high-end applications enter the market and medium-voltage frequency converter market elevator machine and new energy vehicles of great concern by some manufacturers, such as motor controllers, some manufacturers have introduced 1140V MV frequency converter products.
In addition to increasing energy efficiency, in terms of performance, the whole plants of variable frequency controllers more detailed requirements. Low vibration and electromagnetic noise, feedback, more secure, and so is the whole enterprise when you select a variable-frequency control scheme is particularly concerned. It is understood that the core technology is divided into two main parts-air conditioning inverter motor-driven algorithms, and algorithms. In simple terms, air conditioning in motor-driven algorithm programming how to operate effectively and apply algorithms to adjust the air conditioning to achieve specific functionality. 2012 inverter controller and frequency components production enterprises in the two areas have actively exploring, seeking to improve machine performance.
Renesas electronic General products Center longitudinal market Department Manager Liu Tao introduced, 2012, for no sensor 180 ° sine wave vector control, Swiss SA electronic development has has completely autonomous intellectual property of λ algorithm motor control settlement programme, will motor control and single-phase Exchange power power factors correction technology thaw Yu one, tie λ program framework, for user overall system to development machine provides has solid of based platform and friendly of user interface. A case study of air-conditioning outdoor unit, based on Renesas RX high performance, single-chip, machine production enterprises can build with high quality, high performance motor and outdoor single chip power factor correction scheme.
According to reports, the 180 ° full DC inverter air conditioner Fujitsu Semiconductor is based on Fujitsu 32-bit ARMCortex-M3 (FM3) series of chip design. Characteristics of the FM3 line with inverter motor control, with Flash technology to ensure that the 20 data storage and 100,000 erased; 144MHz of the microcontroller operating frequency provides stronger performance; broad power supply operating voltage compatibility with more applications; optimized hardware peripherals are more appropriate for motor control and other features. That scenario core frequency control scheme of field oriented control algorithm using space, can control the motor started fast and stable, and 5kHz 1Hz~400Hz under the condition of carrier frequency motor drive frequency and under high frequency and low frequency, can achieve the perfect smooth sine wave control.
In the development of new products, international rectifier Corporation (hereinafter IR) is to consider ways in which better concentration of frequency conversion programme. The company director of the Xian Center Jeff Smith said: "programmes, in addition to motor variable frequency control drive also dealt with power factor correction, power-speed correction in the previous programmes are independent, IR considers power module with integrated power factor, so that the frequency conversion control system as a whole more efficient, smaller. ”