Xinshida AS720D low harmonic inverter

　　AS720D inherits the extremely high power density of AS720, which is developed on the basis of the original product, and uses non-standard customized cabinets to support the on-board integrated equipment of central air conditioning compressors. The power of 630KW is only the size of a chest of drawers. The engineering inverter with the same power on the market is generally large in size

Low harmonics can be fed back to the front-end rectifier equipment

The AS720D integrates a low-carbon, energy-efficient, low-harmonic regenerative front-end rectifier. In such a compact cabinet, Xinshida has placed an expensive four-quadrant active front end at any cost, which not only has the same 6 sets of IGBTs as the inverter unit as the rectifier unit, but also is equipped with high-end complete LCL filtering equipment, independent AFE control unit and soft control system. So when you open the cabinet door, you will find that there are two communicators inside, which are obvious double-headed dragons. This design is waveform-friendly to the power grid, allowing users to achieve extremely high energy savings and reduce the harmonic content to less than 4%. For example, the general inverter uses brute force when driving the magnetic levitation screw compressor to run at ultra-high speed, while the AS720D is like a Tai Chi master rolling a Tai Chi ball, accumulating momentum and easily freehand, achieving a balance between high-efficiency high-frequency output and energy-saving, low-carbon noise reduction. Compared with ordinary inverters, their skill content and production costs are huge.

The AS720D is cooled with a refrigerant

Because of the four-quadrant technology, the switching frequency is high and the warm current density is nearly twice that of the traditional two-quadrant inverter, whether it can exert a high energy efficiency ratio and improve the power density depends on the cooling system. The traditional engineering inverter chooses the air-cooled cooling method, and a large air duct should be designed for it, resulting in high working noise and simple adsorption of dust and sludge, etc., which requires frequent maintenance and low heat dissipation power; Later, the water-cooled inverter was developed, and the heat exchange power of water cooling was much higher than that of air cooling, but the water cooling system must be equipped with an ice machine to quickly cool the circulating water, which not only consumes excess electrical energy, but also has a large noise. Under long-term use, scale may form in the cooling waterway, which will reduce the thermal power and make it troublesome to clean. Because AS720D is driven by a refrigeration compressor, it is very convenient to use refrigerant for cooling, the cooling power is extremely high, and one less cooling system is used than water cooling, and all the above problems are avoided, and the volume is greatly reduced in addition to low noise, so that the original 110-630KW behemoth becomes a small backpack on the back of the compressor, which completes the on-board equipment, which greatly facilitates the use of the customer's field equipment and brings more space savings and design flexibility to the end customer.

The AS720D is available in a variety of protection classes

AS720D has IP22/IP54/IP55 protection level products to choose from, according to the different needs of customers, can wear armor, direct outdoor equipment, become the guardian saint of central air conditioning. In addition, for some American standard motors with an additional voltage of 460V, only 380V input can be used, and the machine provides stable boost function. This greatly enriches the customer's motor choice, as well as the compatibility of the original equipment modification upgrade.

The new Shida HVAC service team also provides door-to-door maintenance services for products and equipment of "original factory care and professional home" to further meet the requirements of customers for long-term use and reliable operation, and fully follow the way of the sage and hospitality.

Xinshida AS720D low harmonic inverter

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