2014年3月25日星期二
CNC machine tools dedicated regulator
Power grid peak voltage changes , as well as a variety of high-power inductive load impact on the grid , resulting in CNC machine tools dedicated
Air circuit breaker voltage fluctuations , thereby threatening the precise value of the electricity requirements of many expensive equipment safety , resulting in a direct or indirect material losses. According to the different needs of our industrial users of electricity security industry for many users tailor a personalized series of industry-specific regulator, want to use a more stable power supply , to achieve mutual benefit and win-win situation , increasing the value of the assets of electric meter. CNC machine tools dedicated regulator with anti high-frequency interference , electromagnetic and anti- surge performance, not only has phase adjustment, adjust quickly , no noise , etc. , is also equipped with RS-232 interface , enabling remote control, telemetry, remote function , and have a perfect protection.
So-called enclosed TV Speaker, as the name implies
So-called enclosed
TV Speaker , as the name implies, is the top of the box
body in addition to a loudspeaker hole, the other parts are sealed [though is
airtight, but actually in certain parts of the speakers still has a small leak
hole, its role is to make the speaker inside and outside the atmospheric
pressure balanced]. Using the benefits of the speaker, good low frequency
performance can be achieved. Enclosed speakers are usually on the wall of
sound-absorbing material, with many fibrous the sound-absorbing material in
general should be the more the better, it is best to fill in the cabinet, the
advantage is to absorb and weaken the acoustic reflex, adjust the resonance
frequency response; Also can make the air in the cabinet in the isothermal
compression state, so as to make the effective volume increased. Enclosed
Multimedia Speaker generally applied in the speaker's high-end products, its price usually
is more expensive.
Most of the speakers, computer speakers are inverter type and inverter
enclosure has many variants, such as the labyrinth, the acoustic resistance
type, horn type, and so on. Its characteristic is the
bookshelf computer speaker box board more
than a inverter hole or inverting tube. Why do you want to add such a phase
reversal hole or inverting tube? What use is it? Inverter enclosure principle is
that if the rational design of inverting tube size and location, can make the
original horn behind the sound waves travel through the inverter of the pot body
hole at a particular frequency inverter, make its and trumpet sound wave
superposition up from the front, into in-phase radiation, thereby reducing the
enclosure noise increased low frequency acoustic radiation effect, improve the
efficiency of the speaker. Inverter type speaker compared with enclosed
speakers, has the following advantages, it further expanded the speaker of the
low-frequency limit, generally can reach 20 hz, and reduce the lower limit of
nonlinear distortion of acoustic waves. By the use of inverting tube and at the
same time? The overall volume, improve the efficiency.
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