Ac Electric motors -Latest Trends –Technology up date… By Softbit

By: Baljeet


1.STATOR wound for single or three phase
2.ROTOR

If the available rotary motors do not provide sufficient speed and acceleration, with 1FN linear motors and the SIMODRIVE 611 with digital control we provide a linear drive system specially adapted to the requirements of machine tools.

Features:
· Very high traversing speed up to 360 m/min
· Extremely dynamic
· Excellent precision
· Degree of protection IP65
· Saving on mechanical transmission elements such as lead screw, coupling or belt
· Machining powers up to 20700 N per motor

Fig.70 below shows a new development of an induction motor suitable for various applications including explosion protection, oil & gas, chemical, paper and steel industry, with details given below.

H-compact - The basic concept:
The increasing significance of power saving, environmental requirements, the desire for smaller dimensions and stipulations imposed by national and international markets led to the ongoing development of the H-compact series, which has proven itself over the years.

H-compact motors are used in the widest range of industrial sectors, such as oil & gas, chemical, paper and steel. Here, they drive compressors, fans and blowers, refiners, mills and air-separation compressors.

H-compact is available in versions, which can be directly connected to the line supply and can be connected to drive converters.
H-compact is also available in an explosion-protected design. The innovative technology of H-compact motors has set new standards for high-voltage motors.

· Ribbed and internal cooling for IP55 up to 3000 kW
· Extremely high output for the various shaft heights
· Torsion ally rigid, robust frame and end shields manufactured from cast iron with external and internal ribs
· Reliable bearing design
· Rotor with aluminum die-cast cage for high reliability and low stray losses
· With the aluminum die-cast cage, 5.000 starts per annum permissible as standard
· On request, motor versions are available with copper cage instead of the standard die-cast aluminum cage
· Long locked-rotor times and high starting torques
· High impulse strength of the main and conductor insulation
· Low noise
· Long-term corrosion protection

H-compact PLUS:
Highest output, reliability, efficiency and modular cooling design:
The H-compact three-phase high-voltage motors are, in their class,
unique - and that worldwide.

This is new for modular motors up to approx. 5 MW: The motor enclosure and the bearing brackets are made from a high-quality cast iron. This means that the H-compact PLUS is not only highly loadable, but they are also really compact, e.g. for refiners, mills, pumps or compressors.
H-compact PLUS is available in shaft heights of 450 mm, 500 mm or 560 mm - with degree of protection IP55 or IP23 - water- or air-cooled.

The advantages:
All of the modules are perfectly harmonized with one another; it is easy to change from air- to water-cooling. This means, you have precisely the power you require at your fingertips: H-compact PLUS is at home in any industrial sector, whether in the basic materials industry, chemical-, water treatment-, cement plants or in the process industry.

The advantages at a glance:
Excellent operating data, especially regarding
– efficiency
– power factor and
– starting characteristics

Compact type of construction using a
– rugged cast iron design
– high output from a low motor size
Improved cooling for
– uniform, low temperature rise
– low cooling power requirement
Low cooling noise due to
– optimized ventilation
– open-circuit air cooling with special air intake and discharge design
– noise-dampening cooler assembly mounting
High vibration quality as result of
– low excitations

– stiff cast iron housing
– good damping characteristics of the cast iron housing
Low operating costs, as the motors are
– quality products with a long service life
– low power costs and
– low maintenance costs.

Siemens motors offer more than the bare minimum demanded by specifications. In addition to the relevant IEC standards, for instance, our 60 Hz energy saving motors also comply with the stringent requirements of EPACT, the US regulatory act. The complete EPACT-compliant motor series with IEC dimensions is designed according to the NEMA MG1 electrical standard and is meanwhile an established feature of the Siemens product range. EPACT motors that conform electrically and mechanically to NEMA can also be supplied by our NAFTA motor works.

This strict compliance with EPACT regulations opens the door to the lucrative American market for all export-oriented customers

High-energy costs have a significant impact on operating costs. Cutting the latter will lead to improvements in your plant's profitability.

Energy saving motors is our recipe for success. Energy saving motors are standard motors, designed to be used anywhere in the world, and always with full power available. Thanks to their outstanding efficiency, EFF1 energy saving motors permits your power loss (heat loss) to be reduced by as much as 45%.

Our product family:
· High-efficiency energy saving motors that comply with the highest efficiency class (EFF1)
· Improved-efficiency energy saving motors that comply with efficiency class EFF2
· Energy saving motors in accordance with EPACT (Energy Policy Act of 1992) for 60 Hz duties

Our efficiency puts you in the black
Far too little attention is paid to the energy costs of a motor before it is purchased. After all, more than 97% of a motor's total life cycle costs are energy costs. The remainder is accounted for by the costs for purchase, installation and maintenance.

The operating costs are the key.
Our EFF1 energy saving motors are particularly notable for their outstanding efficiency. Your outlay for the original purchase is recovered within a very short time. Our EFF1 energy saving motors soon pay for themselves - with a long service life and practically no maintenance required.

The high level of efficiency and the long service life have an another advantage: They reduce the CO2 emissions and thus protect the environment. Something, which has a very important standing within Siemens.

For three-Phase AC Induction motors, available in 200 - 240V (1 or 3-phase input) at power levels up to 3.0 HP, and with 380 - 480V (3-phase) at power levels up to 120 HP.
Size Options:
1) 6.10"L x 3.15"W x 5.12"D
2) 10.24"L x 3.98"W x 6.89"D
3) 10.24"L x 6.73"W x 6.98"D
4) 20.47"L x 13.39"W x 8.66"D

Key Features:
· Push-button keypad as standard
· Variable Torque or Constant Torque
· Drive efficiency typically 95%
· Optional Filters to meet EMC standards
· Meets UL, CSA (UL508c), CE (EN60204-1, EN50081)
· Speed range of 0 to 30,000 RPM with regulation @1%
· Minimum full load torque - 3 Hz
· Selectable spinning start function
· Eagle EyeTM - remote control, hand-held programmer (option)
· Eagle VisionTM - WindowsTM based application program to store parameters and data (option)
· Braking resistors for Sizes 2 and larger (option)

Applications:
· Heating, Ventilation and Air Conditioning (HVAC)
· Compressors
· Material handling
· Pumping and machine tools

*Note: Attached along with this is the latest “PROTECTIVE DEVICES” developed by LARSEN & TOUBRO LIMITED as detailed below with catalogue:-
1. Solid state analog releases. CT operated for over load and short circuit protection.
2. Microprocessor based solid-state releases, CT operated for over current and earth fault protection.
3. Thermo magnetic releases for over load and short circuit protection.


Softbit provides CAD/CAM software packages for Electrical Machine Design, Industrial Automation products such as Remote Data Logger. Company aims to satisfy the current and future needs of its valued clients. We strive for customer’s satisfaction; our aim is technology dedication & continual improvements. www.softbitonline.com/ Remote Data Logger