News

7/2021 New development of 700 kW booster pump motor for dredging vessels

For several years, Randax Oy has been a developer and supplier of unique PM motor solutions to Marotechniek B.V. (https://www.marotechniek.nl/en/), Randax customer and partner in the Netherlands.

Together with Marotechniek Randax Ltd has developed new motor type to work as booster pump motor in dredging vessels. Motor is air-cooled with nominal power of 700kW and working on speed range of 680 – 770 rpm. Primary advantages of this direct driven high-efficiency Randax PM motor for this application are the extremely low weight and compact size. Randax PM motor is around half of the size and weight compared to conventional induction motor which has been used earlier in dredgers. Operating environment for the motor is also very demanding, so it has been built by premium quality materials to withstand harsh conditions.

New motor type was developed already during the 2020 and first unit was delivered on October 2020. Marotechniek installed the motor to dredging vessel built by TV Dredging B.V. shipyard in Werkendam, Netherlands. In February 2021, the motor was successfully tested on board by Marotecniek and TV Dredging. Same month vessel was handed over to end user Hoftijzer B.V. in Aalten, Netherlands. Vessel named to “Geertje”, was sent over to its first site right away and it has been working on site for last five months.

 

Direct driven high-efficiency Randax PM Motor 700kW@680rpm

Dredging vessel Geertje under testing on Feb 2021

On board motor testing at shipyard premises

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

6/2021 Randax develops new slow-speed pump motor for Pentair

For several years, Randax Oy has been a supplier of unique PM motor solutions for its customer Pentair. Randax motors are used for slow-speed Pentair Fairbanks Nijhuis Fish Friendly Pumps and Turbines.

The Pentair branch in Winterswijk (The Netherlands) specializes in designing, producing, and maintaining tailor-made pumps and pump systems. A wide variety of pumps and controls serve multiple markets, including water supply, sewage handling, flood control, hydropower, desalination, agriculture, irrigation, and fire protection.

In 2020, Randax developed a new slow-speed pump motor model to meet Pentair's high-quality standards and requirements for reliability. The new motor type is flange-mounted, air-cooled, 90 kW power and has a maximum speed of 190 rpm. As usual, Randax tailored all interfaces and connection points to meet the customers' requirements. The end-user chose the color of the motor and it got a refreshing yellow coating!

In December 2020, the motors were successfully tested at Randax premises in Oulu, Finland. The first two motors have already been installed and commissioned in a pumping station in The Netherlands.

 

Motor testing at Randax factory in December 2020

Randax PM Motors installed in pumping station

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

3/2021 Van Loock Motoren is Randax maintenance partner

Van Loock Motoren is Randax contract partner for maintenance, repair, testing and supplying of spare parts for Randax Permanent Magnet (PM) motors and generators. Van Loock Motoren (VLM) works mainly in Belgium and Netherlands area, but can serve Randax customers also elsewhere in West and Middle Europe region.

Van Loock Motoren BV (https://vanloockmotoren.com/en/) is having its main office and facilities in Schoten, Belgium. They also have workshop in Rotterdam, Netherlands. VLM have modern facilities with high technology machinery to overhaul and repair electrical rotary machines such as electric motors, pumps, reduction gearing, centrifuges and blowers to a weight up to 40 tons and power to 5 MW, 11kV.

On top of production facilities, VLM is having state-of-the-art testing equipment. There are two testing fields up to 5000kW for load testing, duration testing and surveyor tests (like for e.g. maritime class certification) of electric motors and generators.

                    

VLM facilities in Schoten, Belgium

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

2/2021 Randax has developed new EDOP dredging motor series together with Marotechniek

Randax has developed and delivered first units of new EDOP Permanent Magnet (PM) motor series to Netherlands. New PM motor series has been developed in cooperation with Marotechniek B.V. (https://www.marotechniek.nl/en/), Randax customer and partner in the Netherlands. New high efficiency and environmentally friendly EDOP series contains four different sizes of motors for power level of 100 – 470 kW and speed range of 560 – 1 400 rpm.

These submersible motors are delivered to Damen Dredging Equipment, who uses them in their electrically driven DOP submersible dredge pump systems. DOP submersible dredge pumps are used for sand and gravel mining and to bed leveling and from barge unloading or to environmental clean-ups. The dredge package supplied by Damen Dredging Equipment consists of an electrically driven DOP submersible dredge pump, its gen set and its operational container. All items are placed on the working boat or deck, which has ample workspace and crane capacity to maneuver the EDOP pump.

By using PM motors in their DOP dredging pump, Damen Dredging Equipment has found more sustainable method for dredging. New EDOP pump with PM motor has lower environmental impact and it is moving the sediment at the lowest possible CO2 emission per ton.

“Randax has been trustworthy, flexible and innovative partner when developing submersible electric PM motors for dredging industry. We really look forward to continue our effective and successful cooperation in the future with Randax says Martin Bossenbroek, Managing Director of Marotechniek”

EDOP 150

EDOP in operation

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

12/2020 AAA Propulsion A-pods are powered by Randax

AAA Propulsion has used Randax special PM motor solutions for several years in their A-pod electric ship propulsion systems. AAA Propulsion's patented and compact A-pod is electrically driven propulsion system with an integrated electric motor, which is directly coupled to the propeller shaft or through planetary gearbox.

AAA Propulsion (aaapropulsion.com) having their main office and production in Boven-Leeuwen, The Netherlands and A letters stands for Ability, Accountability and Agility. The A-pod electric POD propulsion is compact, quiet and efficient ship propulsion solution. A-pods are available in a power range of 90 kW - 2500 kW.

Today there is a call for greener propulsion of vessels, especially near the coast and inland. A low CO2 footprint or even zero is the goal for many shipping companies and shipowners. Therefore, electrical propulsion systems are requested without compromising the performance of the ship. AAA have now equipped ten ships with A-pod propulsion. With their progressive range of A-pod thrusters, AAA Propulsion is now a reliable and future-proof player for the maritime industry.

“Cooperation with Randax has been a success! Randax is truly reliable, flexible and innovative partner in electric PM motors. They have capability to develop and produce high quality PM motor solutions according to customer needs says Dick-Jan de Blaeij, CEO of AAA Propulsion”

Direct driven A-Pod 600 DD

A-Pod PG with a planetary gear

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

7/2020 Randax supplies motors for Pentair Fairbanks Nijhuis fish friendly pumps

For several years Randax Oy has been a supplier of special PM motor solutions for its customer Pentair. Randax motors are used for their slow speed Pentair Fairbanks Nijhuis fish friendly pumps and turbines.

The Pentair branch in Winterswijk (The Netherlands) specializes in the design, production and maintenance of tailor-made pumps and pump systems. A wide variety of pumps and controls serve multiple markets including water supply, sewage handling, flood control, hydro power, desalination, agriculture, irrigation and fire protection.

In spring 2020, Randax has supplied Pentair 6 large, slow speed motors (flange mounted, air-cooled, 330kW with on maximum speed of 300 rpm) for fish friendly pumps. Early March, the motors were successfully type tested at Randax premises in Oulu, Finland. The motors drive flood control pumps, so both pump and motor have to meet high quality standards and have to be extremely reliable.

“This project with Randax has been a success. We trust on Randax capability to develop and produce high quality and reliable motors for our state-of-the-art pumps says John Beukelaar, Project Manager at Pentair"

                    

Motor testing at Randax factory in Oulu, Finland

 

Randax aircooled PM Motors 330kW@300rpm

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

4/2020 Steerprop and Randax sign cooperation agreement!

Randax Oy has signed a cooperation agreement with Steerprop Oy, the leading azimuth propulsion expert from Rauma, Finland. All Steerprop propulsors are customized for each application and powered up to 12 MW for high ice classes or 15 MW for open water. Based on the agreement, Randax becomes a supplier of a new type of Reluctance coupling and other Randax PM machine products.

Randax Reluctance coupling is new innovative solution for azimuth propulsors and its available for torque range of 250 – 600 Nm. It is used to protect the drive train in overload situations. Randax Reluctance Coupling transmits torque without contact through magnetic forces between the inner and outer rotor. It protects adjacent components in the drive train from damage in a sudden overload situation. Conventional way for the sudden overload situations is to protect steering motors with mechanical torque limiter. Benefits of Reluctance coupling compared to mechanical torque limiter are smooth slip by magnetic field, quick return to normal mode after slip and it has no wearing parts.

Reluctance coupling development has been very long-term R&D project for both companies. The first prototype of Reluctance coupling was made and tested together with Steerprop already at the end of year 2015. In the beginning of 2020 first serial production batch was delivered from Randax factory and final cooperation agreement was signed.

                    

Steerprop arctic azimuth propulsor – efficient and safe operations for the most extreme operation conditions on earth

        

Randax Reluctance coupling

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

10/2019 Randax is European Agent of R-PM Heater for aluminium extrusion

R-PM Heater (R-PMH) for aluminium extrusion is developed and manufactured by Shanghai Realman Energy Technology Co., Ltd (SHRET) in China. R-PMH product is result of long term development work of SHRET together with European physicists and Randax as a developer for the electric PM motors of the heater. SHRET was founded in 2005 and it is a high-tech enterprise in Shanghai, China, focused on clean energy and intelligent manufacturing for international technology companies.

Randax Ltd is agent and representative of R-PM Heater in European market. Randax and SHRET signed the Agreement about the agency on 10th July 2019 at ALUMINIUM CHINA 2020 exhibition in Shanghai, China. During the August and September there has been training sessions by SHRET for Randax about the technical and commercial features of R-PM Heater. Randax has also prepared all the marketing material of the product for European customers.

Agreement signed by Leo Liu, Frank He and Jari Koppelo at Shanghai             

Agreement signed by Leo Liu, Frank He and Jari Koppelo at Shanghai

Permanent magnet induction heater offers unsurpassed efficiency compared to conventional heating methods. In R-PMH electricity is used only for automation and to run the PM Motor with hollow shaft. Aluminium heating itself is done by rotating heating permanent magnets inside the hollow shaft. R-PMH as the world's unique and compact aluminium billet heater, providing more precise temperature control and perfectly linear gradient heating.

         

R-PM Heater 

More information about the R-PM Heater, please contact:

Fredrik Jirlow, Tel. +31 6 48 45 30 90 / fredrik.jirlow@randax.fi

Jari Koppelo, Tel. +358 44 734 6312 / jari.koppelo@randax.fi

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

8/2019 Randax supplies motors to Stowe Woodward AG in Germany

Randax Ltd has delivered first patented direct driven roll motors to Stowe Woodward AG having a factory in Schloß Holte, Germany. First motor delivery was made on March 2019 and was successfully installed into customers spreader roll.

Stowe Woodward AG in Germany is world leading manufacturer and developer of spreader rolls for pulp&paper industry. Company has been established more than 100 years ago and is recognized as leader for quality bowed spreader rolls used in the most demanding applications. Stowe Woodward AG is holding well-known Stowe Woodward, Mount Hope, Robec and IRGA bowed spreader roll brands and technologies.

Patented Randax direct driven roll motor is first genuine direct driven motor for curved/bowed spreader rolls. Energy efficient and compact Randax roll motor solution reduces costs of installation and maintenance and enables precise motor speed control, fits inside cramped spaces and for harsh operating environments. More information about direct driven roll motor from www.randax.fi and Products/Roll motors.

Roll motor installed into bowed spreader roll

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

4/2019 Randax delivered world record dredging pump motor together with Marotechniek!

Randax has developed and delivered first new stator – rotor unit in size of 1400kW@360rpm. This stator-rotor unit has been installed to submersible dredging pump motor frame made by Marotechniek. Marotechniek is Randax customer and partner in the Netherlands. This Permanent Magnet motor will be used in direct drive submersed dredge pump which will be installed on hopper dredger ship built by Damen shipyards.

The 1400 kW electric motor on test is the largest Permanent Magnet motor used in a submersed dredge pump drive to date. The air filled motor is smaller, lighter and more efficient than conventional asynchronous oil filled ones – with a staggering measured efficiency of 97% including friction of all bearings and mechanical-seal.

The hopper dredger is designed for mining marine aggregates at -55 m below sea level. The submersed Damen dredge pump is directly driven by a continuous electric motor – that is, without a gear box in between. Moreover, the electric motor forms an integral part of the trailing pipe structure. But the story does not end there: the air filled e-motor is of the Permanent Magnet type. And in addition to that, it usually functions at -25 m below the sea level that is somewhere midway in the trailing suction pipe.

       

  Stator of 1400 kW                                                          Submersible dredging pump motor 1400kW@360rpm

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

1/2019 Randax Ltd has been granted a European wide patent for Randax® unique laser welded steel frame!

European Patent Office (EPO) has granted a patent on Randax® unique laser welded steel frame for electric motors. Finland Patent and Registration Office (PRH) has firstly granted a patent on Randax® steel frame already in 2011.

Randax® motors and generators are built to laser welded steel frame for harsh conditions. Due to its unique design, frame is cost effective and environmental friendly since it uses minimum amount of material. Frame is very strong, robust and still very light in weight. Randax® steel frame can be manufactured by various steel grades according to customers request and it can be used for both air and liquid cooled machines.

         

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

12/2018 Randax developed new motor series for Shanghai Realman Energy Technology Co.

Randax has developed new hollow shaft motor series for Shanghai Realman Energy Technology Co., Ltd (SHRET), long term client and partner of Randax in China. During 2018 SHRET has developed new state-of-art aluminum induction heater called R-PM Heater. New R-PM Heater is very efficient and is using 35 % - 55 % less power compared to the traditional induction Heater. SHRET has used Randax PM motors in their aluminum induction heaters already since 2014, so Randax was natural choice for developing the new type of heater motors as well.

New R-PM Heater is using hollow shaft motors developed by Randax. Motors are size of 178kW@1000rpm, 240kW@850rpm and 340kW@700rpm. Motors are having unique design with aluminum frame including both water- and aircooling. Hollow shafts are very large with diameter of 340 mm and 520 mm while frame diameters are 900 mm and 1190 mm. Large hollow shaft is used for connecting the heating magnets in and aluminum billets are heated by rotating heating magnets inside the hollow shaft.

  

R-PM Heater Motors 178 - 340 kW

Randax delivered first batches of motors to China during the 2018 and in testing’s motors performed even better than it was expected! SHRET has delivered first R-PM Heaters to their clients and heaters are already in operation in aluminum factories in China. So on Randax is starting the serial production of R-PM Heater motors on January 2019. SHRET is expecting big growth in sales for new R-PM Heater on 2019 and order backlog is already in place for first half of 2019.

  

R-PM Heaters

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

8/2018 Teemu Hurskainen joining Randax!

Teemu Hurskainen has been appointed as a Mechanical Design Engineer for Randax, starting from 1st September 2018.

His responsibilities include the mechanical design of electric motors and generators and the manufacture and testing of prototypes. Teemu has done his trainee period in Randax as a designer and has been actively involved in the design and testing of Randax products.

Teemu Hurskainen

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

1/2018 Oceanvolt and Randax sign a cooperation agreement!

Randax Oy has signed a cooperation agreement with Oceanvolt Oy, the leading supplier of hybrid and electric propulsion systems.  Based on the agreement, Randax becomes a supplier of a new type of high efficiency and compact permanent magnet motors used in Oceanvolt’s AXC propulsion system. AXC system is used for the electric propulsion of motorboats. AXC motor will be used with voltage level of 48 V and due to modular product structure it can be used in wide power range of 10 – 40 kW.

The prototype of AXC motor was tested together with Oceanvolt already at the end of year 2016. Pilot delivery batches were delivered from Randax factory during year 2017 and serial production of AXC motors will be started in the beginning of 2018.

        

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

9/2017 Shanghai AFM Energy-saving Technology Co. is Randax agent in China!

Randax has signed the agent agreement for China market with Shanghai AFM Energy-saving Technology Co., Ltd (AFM). Agreement was signed in Shanghai 11th September and is valid minimum for next 3 years. According to agreement AFM will work as a sales agency for Randax motors in China. They will also produce local customizing when needed and handle the commissioning of Randax motors in China.  
AFM is subsidiary of Shanghai Realman Energy Technology Co., Ltd (SHRET), long term customer of Randax in China. SHRET has used Randax PM motors in their aluminum induction heaters already since 2014. AFM / SHRET knows Randax products well and they trust that there’s big demand for energy efficient and compact special motors in China market. Especially energy efficiency has become most important sales argument for Chinese customers. China state is also supporting and subsidizing all energy saving electric solutions for industry.  

AFM/SHRET General Director Frank He, AFM Sales team and Randax Managing Director Jari Koppelo signing the agreement in Shanghai 11th September

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

6/2017 Randax Ltd has developed new aluminum frame motor

Randax Ltd has developed new aluminum frame motor model.  Motors are air cooled and designed to be used in power range of 15 – 45 kW and with speed of 1 000 – 4 500 rpm. These new motor models are meant to be used for pump, blower, compressor or etc. applications. Motor can be fully tailored and integrated for customer’s application as a direct drive by mounting flanges or adapter.

Energy efficient and compact Randax motor solution reduces costs of operation, installation and maintenance. Motor is light weight and fits inside cramped spaces and for harsh operating environments. 

Technical specifications:

          

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

1/2017 Randax Ltd has developed new roll motor model

Randax Ltd has developed new model about the direct driven roll motor which is used for spreading rolls in pulp&paper industry. New roll motor model is smaller than previous one and cooling is arranged by natural convection through the motor frame. This model is meant to be used with small and slow (< 500 rpm) spreading rolls. 

First pilot delivery of 3 pcs of new roll motor model was done to Stora Enso Oulu mill on end of year 2016. These roll motors are used to operate rolls in pulp mill and are having nominal speed of 180 rpm only.  

Energy efficient, compact and patented Randax roll motor solution reduces costs of installation and maintenance and enables precise motor speed control, fits inside cramped spaces and for harsh operating environments. More information about direct driven roll motor from www.randax.fi and Products/Roll motors.

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

3/2016 Randax Ltd has been granted a patent for direct driven roll motor

Finland Patent and Registration Office (PRH) has granted a patent on Randax direct driven roll motor which is used for spreading rolls in pulp&paper industry. Developed Randax roll motor is first genuine direct driven motor for curved spreader rolls.  The rotor of roll motor is attached directly to the rotating roll pipe and the stator frame is fixed to the dead axle of the roll. Direct driven roll motor is supported by the roll bearings without separate bearings for motor.

Energy efficient and compact Randax roll motor solution reduces costs of installation and maintenance and enables precise motor speed control, fits inside cramped spaces and for harsh operating environments. More information about direct driven roll motor from www.randax.fi and Products/Roll motors.

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

2/2016 Randax Ltd’s 10th Anniversary

Randax Ltd was founded in Oulu, Finland on 23rd of February 2006, so during this week company celebrates 10-Year anniversary milestone.

Company was founded for the development and commercialisation of a product idea by Matti Rantapää, for a new type of special electric machines based on permanent magnet technology. Between 2006 and 2012, Randax focused on product development only. The aim was to ensure that the motors under development would include the full range of innovative solutions and provide customers with a major competitive edge. 

Today Randax is growing company both in domestic and international markets and continues to design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.

12/2015 New liquid cooled motor solution

Randax® has developed new series of liquid-cooled electrical motors for power range of 45 – 200 kW. Liquid-cooled electrical machines offer a great option to air -cooled if cooling liquid is readily available on the application site.  A liquid-cooled Randax® electrical machine can reach efficiencies up to 50% higher than a corresponding air-cooled machine. This makes liquid-cooled Randax® electrical machines extremely compact and efficient.

Benefits of liquid cooling are high output-to-size ratio, dirt and dust cannot enter the closed cooling circuit and machine is not sensitive to surrounding air temperatures. Randax® motor technology enables the efficient cooling inside the entire machine frame and customized materials and coolants according to application and customer needs.

"The new liquid-cooled electrical motors can be tailored for example to pump hot liquids, to be used as a drive motor for vehicles and construction machinery and in demanding process industry applications. The first pilot motor was integrated in cooperation with Sulzer Pumps Finland to their pump. Starting from summer 2015 this combination has been successfully used in pilot site as a high speed mixer”, says Kimmo Huurinainen, R&D Manager of Randax Ltd.

Read more and see tech specs here.

Randax Ltd design and manufacture advanced permanent magnet motors and generators, as well as electric drive systems for industrial equipment manufacturers.