Drives and Control Solutions

Motors, Control Solutions, Power Transmission and Advanced Motion Technology                                                                 

June 30, 2022

 

DCS Nidec Launches SynRA for US Market 1 400

Nidec Corporation recently announced that it has launched for the US market SynRA (Synchronous Reluctance Motor with Aluminum Cage Rotor), the world’s first aluminum cage-equipped, high-efficiency synchronous reluctance (SR) motor that combines an SR motor with the cage-type induction motor’s basic principles.

The cage-type induction motor, used as a general-purpose motor for industrial applications, can be activated when connected to a commercial power supply. In addition, the motor, which does not require an inverter (the device to control rpm), does not cost a lot to introduce, and this is why it is used in fans, pumps, compressors, cranes, elevators, and many other industrial machines. Furthermore, the cage-type induction motor can be operated with a simple and inexpensive V/F converter*1 for inverter-based variable-speed products such as air conditioners and other home appliances. This is why the cage-type induction motor is used for a wide range of constant- and variable-speed applications. On the other hand, the motor structurally generates a rotation gap (loss) between its rotor and stator, resulting in less efficiency compared with the SR motor, which is described later.

Thanks to a special reluctance design adopted for its rotor (by incorporating the “cage structure” of the cage-type induction motor), Nidec’s SynRA rotates as an induction motor when activated, and spins in synchronization with frequency during operation. This way, the motor produces less loss and achieves higher efficiency than does the cage-type induction motor. In addition, when using a controller to generate a higher efficiency, the SynRA only requires a simple V/F open-loop control*2 unlike conventional SR motors, which need vector control or precise control parameters for that purpose. Nidec’s SynRA has been certified as an IE5 product – the highest level of an international high-efficiency standard – and verified to be made into a product inexpensively. These facts raise expectations for the SynRA to replace existing cage-type induction motors in the future.

DCS Nidec Launches SynRA for US Market 2 400

Nidec Group stays committed to offering revolutionary solutions for energy-efficient motors to suppress electricity consumption, and contribute to curbing environmental burdens.

*1. V/F converter: A device to convert voltage (V) into frequency (F), and vice versa. While many electric signals are outputted in the form of voltage, those signals cannot be conveyed accurately as voltage due to fluctuations in the transmission system’s amplification and linearity. This is why a V/F converter is used to transform voltage changes into frequency ones, to demodulate transmission signals with an F/V converter later.

*2. V/F open-loop control: A control method to change an AC motor’s speed with an inverter. Despite its simple configuration and easy adjustments, the V/F open-loop control, in general, has a poor controlled response, while still demonstrating a high efficiency with the SynRA.

 

For more details on the technologies for the synchronous reluctance motor, click here

 


Editor's Pick: Featured Article


 

DCS Siemens SIRIUS Controls Ensures Cold Beer 1 400

Breweries are known for transforming malt, hops, and yeast into beer in gleaming brewing kettles and large fermentation tanks linked by numerous pipes.

Over the centuries, the equipment for mashing, lautering, boiling, and fermenting beer according to carefully guarded recipes has been steadily perfected.

 

The chiller is the heart of the brewery

One of the most important parts of the brewery, and perhaps the least visible, is the chiller. The fermentation temperature of the beer is crucial, which means that the heat generated by the yeast fermentation must be carefully controlled by the chiller.

If the beer ferments at too high a temperature, the yeast can produce a variety of undesirable aromas that ruin the beer.

According to Justin Thomas, President of G&D Chillers, based in Oregon

"The chiller is the heart of the brewery. Owners invest not only a lot of money in the brewery and brewing equipment, but also a great deal of time in the production of beer. But if the chiller fails, all that goes out the window."

Partnerships to keep pace with growth

Thomas says that growth at G&D Chillers has been exponential over the past 15 years. To continue this rate of success, the company had to look for new ways to meet customer demands for reliable, state-of-the-art chiller options.

For example, G&D Chillers recently teamed up with Siemens and the global distribution and supply chain solutions company WESCO to meet these needs and stay ahead of the competition. "We're still a small manufacturing company, but big enough to produce some technically advanced equipment," says Thomas. "We've always been service-oriented and always stood by our equipment, no matter what the problem. We get the same kind of support and service from Siemens that we give to our own customers."

 

Read more here 


 


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The 3RV29 infeed system is based on a basic module complete with a lateral incoming supply unit (three-phase busbar with infeed). Expansion modules (three-phase busbars for system expansion) are available for extending the system.

 

 

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