IE4 Small-size Synchronous Reluctance Motors
Company EMACH has developed Small-Size synchronous reluctance motor (Small-Size SynRM) without magnets.
The results of the experimental comparison of the small-size SynRM developed by the company EMACH and ABB’s induction motor are shown in the table.
Table. The specifications of 1100 W 3000 rpm motors
|
Motor type |
Induction motor |
Small-Size SynRM |
|
Manufacturer |
ABB |
EMACH |
|
Eff1, (torque 100%, speed 100%) |
82.4 |
84.9 |
|
Eff2, % (torque 50%, speed 75%) |
76.2 |
84.7 |
|
Eff3, % (torque 25%, speed 50%) |
63.8 |
80.4 |
|
Efficiency class (New standard IEC 60034-30-2) |
IE3 |
IE4 |
|
Frame size |
80 |
63 |
|
Weight, kg |
10.8 |
5.5 |
In the table Eff1 is the efficiency at the rated speed and the rated torque, Eff2 is the efficiency at the speed equal to 75% of the rated speed and the torque equal to 50% of the rated torque, Eff3 is the efficiency at the speed equal to 50% of the rated speed and the torque equal to 25% of the rated torque.
The weight of EMACH’s Small-Size SynRM is 5.3 kg (50 %) less than of induction motor. In Fig. 1 the rotor of the induction motor (at the left) and the rotor of the Small-Size SynRM (at the right) are shown. The dimensions of EMACH’s SynRM is much less than of the induction motor. Moreover, the production cost of the Small-Size SynRM is significantly less than the production cost of the induction motor.
Fig. 2 shows the experimental comparison of EMACH’s Small-Size SynRM (green line) and ABB’s induction motor (red line) at the pump load (quadric dependence of torque on speed). The efficiency of EMACH’s Small-Size SynRM is higher than of ABB’s motor in wide range of powers.
Company EMACH can develop Small-Size SynRM (high output) from 1.1 kW to 18.5 kW with approximately 50% less weight than the weight of correspondent induction motor and with higher efficiency.
