EMRAX motors
EMRAX motor/generator is our main product. We developed it and now we are starting serial production. EMRAX motors are suitable for electric vehicles - EV, power plants, wind and hydro power stations. The main facilities are: low weight (11,7 kg), high power, high torque, direct drive, low noise.
They do not need mechanical gear box, so thay do not waste energy to reduce the final rotation.
Technical data
|
Type
Technical data
| EMRAX Air Cooled, air flow speed 25 m/sec, 20°C | EMRAX Liquid Cooled, water flow 0,2 l/sec, 20°C |
Explanations |
|---|---|---|---|
| Power dc 2 min / continious at 200 V DC [kW] |
40 / 30 | 45 / 30 | Tested at 2000 RPM |
| Power dc 1 min / 2 min / cont. at 300 V DC [kW] |
60 / 50 / 30 | 60 / 50 / 35 | Tested at 3000 RPM |
|
RPM at 200 V / 300 V DC |
2200 / 3000 | 2200 / 3000 |
Next challenge |
| Peak / cont. current DC [A] | 220/120 | 220/130 | / |
| Torque peak 2 min / cont [Nm] | 200 / 120 | 200 / 130 | Useable for direct drived systems |
| Efficient % (low / high RPM) | 91 - 95 | 91 - 95 | Economy test HWFET 95 % |
| Dimensions diameter / width [mm] |
Φ 228 / 86 | Φ 228 / 86 | / |
| Star wire resistant [Ω al 25°C] | 0,018 | 0,018 | / |
| Phase current density RMS at 30 kW [Amps/mm2] |
12 | 12 | Peak 2 min 30 Amps/mm² |
| Magnetic flux | Axial | Axial | Duble gap |
| Temperature sensor in the motor |
kty 81/210 | kty 81/210 | / |
| Number of pole pairs | 10 | 10 | / |
| Weight [kg] | 11,6 | 11,9 | 12 kg EMRAX 4000 RPM |
Note: We reserve the right to change technical data.
EMRAX tests
Main Features
- EMRAX motor-generator is suitable for airplanes, boats, EV, wind and hydropower plants, it can also be used as a step motor.
- EMRAX is liquid or air cooled. Liquid cooled motor can be combined with air cooled system to get better power duration. Liquid cooling flow (double tube row in stator) is 0,2 l/sec - inlet water 20°C.
- For air cooled motors the air speed must be 25 m/s at max air temp 20ºC.
- For EV (direct drive system) and for some similar options the motor needs encoder sensor RLS or resolver Tamagawa TS2620N21E11 (goes perfect with UNITEK controller E-Bamocar-D3). Also the application for a glider plane needs it for stopping the propeller. It is possible to drive two motors on one shaft, with one or two controllers. Better option is that two motors are driven by two controllers. Anyway two motors can be driven by one controller - in this case the angular degree must be to totaly configured in the right position and also boath motors must operate under the same conditions (cooling).
- Two motors can be wired serial on one shaft to get doubled torque and up to 120 kW motor power.
- Motor can also run as sensor less option (boat and airplane application), with encorders RLS or resolver Tamagawa TS2620N21E11 which goes perfect with UNITEK controller E-Bamocar-D3
- At the moment we can offer controller SAC 41 LC from company Piktronik - it has allready been tested. Also other controllers - Unitek GmbH, Sevcon, Semicron, Elmo are useble, but they have not been tested in our company in all. We have got also some good informations about Unitek and Sevcon controllers suitability for Emrax motors from our customers.
- The motor and controllers have slope temperature protection. Motor slope temperature protection starts at 100ºC on copper windings and reduces the power to the nominal valuae at 120ºC. The controller has slope temperature protection from 70/85ºC.
- EMRAX uses 3 phases sin wave commutation. It has no cogging, no vibration. High torque at low RPM can give high power without noise and with the best efficient.
- Motor can regenerate the electric energy via controller into the batteries - it can be used as a generator.
- High torque allows the motor to drive systems directly and also improves the motor's efficient.
- EMRAX motor produces much less noise compared with other BLDC motors.
*We can also design special options of EMRAX motor for lower voltage, for lower RPM in the same housing, which can be modified, for different power, torque. But in this case, the price is higher due to the development.
Mounting options - twin version and propeller version
EMRAX dimensions
EMRAX twin carrier (optional)
EMRAX shaft - flange/hub (optional)
EMRAX Patent
The motors (air and liquid cooled) are patented.
Patent number is: P-201000114
Pricing and buying
Now we are selling the EMRAX motors as prototype motors.
The EMRAX motor price is similar to the same powered brush motors. For the price list please ask us by email:
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The price depends on the type and the amount of ordered motors.
How to order ...
Warranty
We give 1 year warranty if our motor is used in accordance with Manual for EMRAX motor. |
User Manual for EMRAX motor file type: PDF, file size: 952 KB  |
file type: |
Improvements and modifications:
October 2011: EMRAX improved LC system - for more informations click here.
September 2011:
- EMRAX twin application - for more informations click here.
- EMRAX motor with resolver application - for more informations click here.
EMRAX motors tested on glider plane Electric Apis EA1
The EMRAX motors have been tested several times on glider plane – Electric Apis EA1. Electric Apis EA1 is one of the first electric sailplanes in the world and the first one in Slovenia EU (the first flight was 18. April 2005). It can take off with an electromotor and climb up to altitude 1800 m at 50%DOD, even to altitude 3000 m at 90%DOD. The altitude depends on the percentage of the discharging of the Li-Poly batteries. The best recommended discharging of the batteries is about 50%DOD. In this case the altitude is app 1800m and the batteries can give 1500 cycles. More info here: http://kokam.com/english/product/kokam_Lipo_01.html
We developed EMRAX electric motor because there was no suitable electric motor for direct drive propeller in the world market. The high powered - BLDC electric motor EMRAX 30 kW continuous power is reliable for each altitude. It operates with minimum noise and gives high power and excellent torque at low RPM (direct drive prop) for best climbing up to 6,0 m/s.
In the future solar cells on the wings will give enough nature energy for many take offs and the plane will climb much over 3000 m of the altitude.
AMS flight used to produce APIS sail planes in many versions. The company PIPISTREL is now a new owner of APIS gliders project now. More info here: http://www.pipistrel.si/planes/721
In 2004 we got kit version of Apis EA1. Besides developing an electric propulsion system, we also change the canopy design, made more effective inner ventilation, developed the retractable wheel with shock-absorber and many new designs for electric power system. The retractable wheel improves L/D = 40:1 and it also visually improves the stream line of the plane. The doors on the body are closed when the motor with the propeller is outside or inside of the fuselage. The electric system does not produce noise, it is clean, safe, reliable and virtually maintenance free. We are in favor to make reliable innovations, which are the most important for comfortable in enjoyable flying.
Technical data and performance of glider plane Electric Apis EA2
Technical data and performance of glider plane Apis EA2 using the NEW brushless electric motor named EMRAX. The last tests on the new EMRAX air cooled prototype electric motor (Dec 2009) mounted on EA1 and the light version on the plane EA2 (2011)- show us excellent results:
| Electric Apis EA2 – Technical data and performance | |
|---|---|
| El motor | brushless EMRAX (produced by ENSTROJ) |
| Electric motor weight | 10,5 kg (lighter version as special prototype for EA2) |
| Controller DC/AC - Piktronik | SAC41 (aircooling) |
| Engine peak power (2min) | 40 kW - 54 HP (aircooling 25 m/sec) at 200V DC/2000 RPM |
| Torque continuous/peak | 130 Nm/ 220 Nm |
| Engine speed EA2 | 1800 RPM at 200V DC ( direct prop drive) |
| Propeller diameter EA1 | 1,8m |
| Static prop thrust (prop 1,8m) | 1500 N |
| Batteries Li-poly - power capacity | 8,0 KWh |
| Capacity current | 40 Ah |
| Voltage DC | 230 V |
| Batteries weight | 55 kg |
| Charging time - depend of DOD | 4 - 6 hours/230V |
| Take off distance on grass/ time | 80 m ( in 8 seconds) |
| Take off distance on asphalt/ time | 50 m ( in 5 seconds) |
| Max climb rate | 6,0 m/s |
| Max altitude 50/90% discharging | 1600m (3000m) |
| Best glide | 40 : 1 at 95 km/h |
| Empty weight | 280 kg |
| Max take off mass | 370 kg |
| Max horizontal flight distance | 200 km |
Battery packages for electric Apis - for more informations here.
Videos – EMRAX electric motor on Apis EA1
In 90 seconds climbs up to 350m - included take off. Temperature on copper EMRAX prototype 30kW (41HP) air cooling motor windings was only 70°C. Max altitude is 3000m at one charging the batteries.
Video: Take off and retracting the propeller in to the fuselage EA1
NEW Video: Take off on asphalt running way
Video: Take off Ferlach, Austria
Video: Take off, low pass, landing
