The new guidelines for the energy efficiency of electric drives place high demands on the motors. For many users, the question arises as to whether they now have to switch to significantly more complex drive systems, which also take up additional space. The answer is no. There is a motor design that works much more efficiently in the same space and without additional components and also has other advantages. The use of the "Sinochron "Motors by ABM Greiffenberger is a sensible alternative for all those applications that are not (yet) covered by the new regulations.
The contents of EC Regulation No. 640 / 2009 are unambiguous: Uncontrolled three-phase motors, including geared motors with rated power from 0,75 to 375 kW, which work permanently with nominal load (operating mode S1), must be available from 16. June 2011 have at least the efficiency class IE2 according to IEC 60034-30: 2009 (high efficiency). From 2015, motors for such applications must even achieve efficiency class IE3 (premium efficiency) or the IE2 drive must be equipped with electronic speed control.
New drive concepts needed
Applications where continuous operation is common include pumps and fans, which account for a large proportion of industrial power consumption. The manufacturers of these components are now required to rethink their drive concept and adapt it to the new requirements. This is where the use of the Sinochron motor comes in handy.
The main characteristics of this type of engine are apparent when the name is broken down: it is a high-performance permanent magnet Synchron motor with a sinusoidal flux distribution (emf). Thanks to the internal permanent magnets, the rotor can be easily manufactured, and you can also achieve favorable magnet geometries. The anisotropic rotor geometry allows a sinusoidal magnetic flux distribution. This has the pleasant consequence that no cogging moments arise. The distributed stator winding is identical to the winding of asynchronous motors, so that the stators can be produced inexpensively in very large series.
From these design features you can already derive essential properties of the Sinochron drives. The motors are characterized by compact design, good concentricity and low noise. From the asynchronous motor, they differ by about twice as high short-term overload capacity. Therefore, you can choose a smaller motor design in many cases. The engines are very easy to control; In conjunction with the associated control unit SDC, reliable, controlled operation can be achieved from standstill to high speeds. The drive convinces with very good concentricity. Even at very low speeds as well as load surges and speed changes, a high level of dynamics is achieved.
Top in terms of energy saving: better than IE3
The Sinochron motors are already used in various industrial applications. An important motive of many users for the use of these engines was a factor that has not yet been mentioned: the low energy consumption. The drives are classified in efficiency class IE3, but achieve significantly better values than IE3 demands. By substituting existing uncontrolled AC drives, energy savings on the order of 20 to 35% can be expected.
Not only energy but also space saving
With this property profile, the drives are suitable for driving z. As pumps and fans, which operate in continuous operation and thus fall under the EC Regulation. The substitution of the drives in existing machines and systems is easy, because no additional components such as encoders must be provided. If the drives are used in new constructions, the user benefits from the up to 30% smaller construction volume. Thus, machines can be constructed more compact.
Of course, the same advantages also apply to applications in which no continuous operation according to the standard (S1) is achieved, but the drives are in use over a long period of time. Here the energy saving advantages add up (almost) as fast. In many of these applications, eg. As in warehouse logistics, the compact design plays an essential role in the selection of the drive components.
Additional advantages in partial load operation
Since its efficiency in the partial load range is also significantly better than that of conventional asynchronous machines, the Sinochron engine works even more efficiently in part-load applications. In addition, the drive has almost no losses at idle. With these characteristics, this engine design offers great advantages, including for the drive of conveyor systems, escalators, winders, compressors and travel drives.