Reduce energy costs with Rosync
Climate change is already having severe economic consequences. A drastic reduction in CO2 emissions can help to halt the negative effects. At the same time, scarcer resources are leading to rising energy prices. There is no end in sight. The more efficient use of energy offers considerable potential for savings.
Innovative motor concepts significantly save electricity and can substantially reduce energy consumption. The electric motor manufacturer Rotek from Bremerhaven decided to take this route and launched the Rosync energy-saving motor with patented GreenDrive Technology in 2008. Its technology combines low power consumption with low material usage through an extremely compact design. In the meantime, the motor has proven itself on the market and there are good examples of its successful use.
What makes the Rosync so efficient?
Synchronous motors are already more efficient than asynchronous motors due to their operating principle. This is because the use of permanent magnets means that no energy is required to generate the magnetic field in the rotor system. But the developers achieved the outstanding efficiency through the materials used and a special stator design. The Rosync also uses high-performance ring magnets. The iron in the stator was reduced to the necessary minimum to preserve as much space as possible for the coils. Optimized winding heads reduce winding losses, which contributes to the improved efficiency. The result is exceptional efficiency, also in terms of raw material consumption. This has a positive effect on manufacturing costs.
High efficiency
The Rosync is available as a single-phase capacitor motor and as a three-phase motor. The efficiency of the capacitor motor has been increased to over 70 percent, while the efficiency of the three-phase motor is up to 90 percent. The three-phase motors offer an output power of 50-85 watts in continuous operation. Meanwhile, they can also reach 100 W in short-time operation. The advantages of the Rosync motor, namely energy savings, come into play especially at high duty cycles. The Rosync as a capacitor motor offers 20 to 36 watts of output power in continuous operation. With windings for short-time operation, up to 50 watts can be achieved.
Calculation for three-phase motors
The measurements were carried out in partial load operation to show a realistic example
Three-phase motors | Efficiency | Output power | Power dissipation |
ROSYNC | ca. 90% | 25 W | 2,75 W |
This means that the Rosync small motor achieves a similar level of efficiency as a significantly larger 750 W motor with IE4 rating. This is particularly remarkable because usually the efficiency of motors increases with increasing size.
Advantages at a glance
- excellent efficiency
- Extremely compact design, ideal for confined spaces
- High running smoothness due to absence of self-retaining torque in de-energized state
- constant speed (independent of load and voltage)
- short start and stop times
- low vibration running
- Frequency converter operation from 30 - 2100 rpm possible
- High durability
- maintenance-free
Good reasons for the Rosync
At Fimatech Industrietechnik in Rehling, the savings effects of replacing a conventional motor with the Rosync can be clearly seen. The company has been producing modular conveyor belt systems since 1995. Whereas simple asynchronous motors were used in the past, the Swabian conveyor technology specialists have been using Rosync three-phase synchronous motors for fifteen years. For good reason: In three-shift operation, a small three-phase motor saves 240 kilowatt hours of electricity - per year. Fimatech accommodates the drive motor in the module body of the conveyor belt. This allows for a very compact design. Other important arguments for using the Rosync are the robust planetary gearbox and the low heat generation, because the link belt conveyors from the Rehlingen-based company are often used for heat-sensitive parts.
The Aachen-based feeder technology specialist RNA uses Rosync three-phase AC and AC motors with worm gearboxes in the conveyor belt drives of its type FP15 narrow-gauge belts. They are particularly suitable for handling a wide range of conveying tasks in confined spaces. The belt body consists of an aluminum profile, which allows flexible mounting options, for example of stands, side guides and the like. The double narrow-gauge belt FP15 D allows, among other things, the transport of hanging workpieces and facilitates the installation of devices between the belt bodies (e.g. removal station). RNA chose the Rosync because it delivers higher performance with the same installation space of its predecessor.
Proven drive technology for many applications
For more than fifteen years, the Rosync has proven itself as a drive on the market. The Rosync shows its advantages particularly in applications with longer duty cycles, such as conveyor belts, screw conveyors or as a drive for the drum in dehumidifiers and rotary heat exchangers. It also impresses with powerful torque and compact design in applications with short duty cycles, such as in electromechanical braking systems or label dispensers. The Rosync has the same external design as all motors from the Rotek modular system. The customer can replace previously used Rotek motors with the Rosync without any design measures and save energy and costs at the same time.
Energy saving motors Rosync
Author: Gerhild Hustädt
Press and public relations at the Rotek GmbH & Co. KG in Bremerhaven
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GERMANY
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