News

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.

10/2018 Kolmer Special Motors –Randax partner in Netherlands

Randax partner company in the Netherlands is Kolmer Special Motors (KSM). Managing Director of KSM Mr. Berend Muis tells about the business they are involved and cooperation with Randax:

“One and a half year ago we have started working with Randax as one of our suppliers for permanent magnet motors. From the first moment we were impressed with the service level we received, the cooperation we have and the very good quality we get.

On all fronts the company Randax fits to our company, as we work in several industries which are high demanding on quality and fast responds like marine propulsion, water treatment, dredging and energy. With this high demands we have grew the cooperation very fast into a partnership where we communicate in an open and transparent way. The trust we have in Randax is just what we were looking for to grow our business.

We move in a very rapid way from smaller motors and stator-rotor units to bigger and bigger products. Together in this partnership we are pushing now the limits even further and the good thing from the Randax people is that they are open for this. We are extremely happy with Randax as a partner and we expect that our growth will go in parallel with Randax growth and we would stimulate each other to go outside our comfort zones and push the success even further than it is now! "

     

Berend’s summary about the reasons KSM is working with Randax:

  •  Knowledge of the electric machines
  •  Trust
  •  Flexibility
  •  Fast response
  •  Customer friendly
  •  Open communication and Open minded

" To conclude this is that we don’t feel as customer with Randax, we feel like we are a part of Randax and a team operating together! "                 

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.

11/2017 Randax and Kolmer Special Motors signed the cooperation and distribution agreement!

Randax has signed the cooperation and distribution agreement with Kolmer Special Motors (KSM) in Netherlands. Agreement was signed during the Europort fair in Rotterdam on 8th November and it is significant for both parties in terms of business growth.  According to agreement, KSM will work as a non-exclusive distributor for Randax motors in Benelux and UK area. KSM will also produce local customizing and handle the commissioning of Randax motors when needed. 

Kolmer Elektromotoren group is established in 1983 and has already 34 years of experience in the market of electric motors in Europe. Company is based Putten, Netherlands and has a strong industrial customer base for standard and special electric motors. KSM sees big demand and potential for great growth in a field of special motors in their market.  

Jari Koppelo, Managing Director of Randax Oy, is satisfied with the agreement: “This is a great opportunity to Randax and we are very pleased to start the cooperation with Kolmer Special Motors. Our business is now in strong growth especially in Netherlands and first deliveries to KSM will be done already now in November 2017. We expect this to have a positive influence on our marketing activities in whole Benelux and UK area too. KSM has turn out to be perfect partner for us by knowing their market very well and having willingness to growth the business of special motors.”
 

Mr. Fredrik Jirlow /Randax Benelux, Mr. Jari Koppelo /Randax Managing Director and Mr. Berend Muis /Kolmer Special Motors Director, signing the agreement in Rotterdam on 8th November 2017

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.