The Switch Industry Needs Large - Toward High Noise Immunity

With the innovation of electrical equipment, switching power supply industry will also have more extensive prospects. In this opportunity, the Chinese enterprises should seize this opportunity, under the premise of the technological innovation and the development of routes out of the research peers, and create a new world for the high-speed development.

Switch, in life the most common but electronic equipment, room photoelectric switch, delay switch ... residential corridor switch demand in modern society. In recent years, with the rise of real estate, the switch demand along with high smart grid construction, is allowed to enter a period of rapid development.


Switching power supply definition
Switching power supply is the use of modern power electronics technology, control switch turn-on and turn-off time ratio, to maintain a stable output voltage of a power supply, switching power supply generally constitute by pulse width modulation (PWM) control IC and MOSFET. With the development of power electronics technology and innovation, so that the switching power supply technology is constantly innovating.
Switching power supply to a small, light-weight and high efficiency characteristics widely used in almost all electronic devices, today's electronic information industry, the rapid development of the indispensable power.
Switching power supply range of applications
Switching power supply products are widely used in industrial automation and control, military equipment, scientific equipment, LED lighting, industrial equipment, communications equipment, electrical equipment, instrumentation, medical equipment, semiconductor cooling and heating, air purifiers, electronic refrigerator, LCD display, LED lighting, communication equipment, audio-visual products, security monitoring, LED lights bags, computer cases, digital products and instruments and other fields.
Huge market demand of China's switchgear industry
According to relevant statistics, China's annual basic switchgear annual growth rate of 7% to 11%, which is a very large number. It is estimated that if the alternative to the traditional switch intelligent switch, according to the annual replacement rate of 3% to 5% of total annual demand will reach 30,000 to 50,000 units, which does not include the demand part of the new projects. The actual amount of low-voltage switchgear Although no accurate statistics, but the proportion of low-voltage switchgear, high voltage switch configuration roughly 1:12 to 1:15 On this basis, the annual demand of intelligent low-voltage switchgear should also be in the 500,000 to 700,000 units.
From the switchgear industry, 126 kV and above voltage level, including a rated voltage of 126 kV, 252 kV, 363 kV, 550 kV, 800 kV and other voltage level. The field of competition in the market is more gentle, on behalf of enterprises in addition to some well-known foreign companies, high domestic enterprises Zhongping Group, Xi'an opened, New Northeast Electric relatively large market share.
High-frequency technology to promote the development of the switch industry
The development direction of the switching power supply is a high-frequency, high reliability, low power consumption, low noise, interference. The switch is the development direction of the power of high-frequency, high-frequency switching power supply miniaturization, and switching power supply into a wide range of application areas, especially in high-tech fields, and promote the development and advancement of the switching power supply, annual more than two-digit growth rate toward the light, small, thin, low-noise, high reliability, anti-jamming direction.
Overall trend of switching power supply: modular
Modularity is the general trend of the development of the switching power supply, modular power supplies can be used to form a distributed power systems, N redundant power system can be designed and capacity expansion in parallel. Running noise of the switching power supply shortcomings, if the individual pursuit of high frequency noise will also increased, while the use of part of the resonant converter circuit technology, in theory, to achieve high-frequency technology can also reduce noise, but some The practical application of resonant converter technology there are still technical problems, it still needs a lot of work in this field, so that the technology to practical use.