1. MAC DIVISION Asynchronous vector motors

2. Reservados todos los derechos por Vascat, S.A. INVERTER DRIVE: WHICH MOTOR TO USE WITH?  Are you planning to run a marathon in high-heeled shoes?  Then, why are you using an standard asynchronous motor in your variable speed application?

3. Reservados todos los derechos por Vascat, S.A. STANDARD MOTOR vs VECTOR MOTOR STANDARD MOTOR vs VECTOR MOTOR Design priorities:

4. Reservados todos los derechos por Vascat, S.A. CONSTRUCTIVE DETAILS Active Fan cooling system Second shaft for encoder fitting Integrated encoder connector Reinforced materials and vacuum impregnation Low inertia Rotor Integrated PTC for thermal winding protection Low losses laminated square frame Parking brake option

5. Reservados todos los derechos por Vascat, S.A. MOTOR PERFORMANCES: STANDARD vs VECTOR Nominal Overload 125 Hz Vector MAC Q. 50 Nm Nominal Overload 4070 Standard 100 % 160 % 200 %

6. Reservados todos los derechos por Vascat, S.A. TYPICAL PROBLEMS USING STANDARD MOTORS FOR INVERTER DUTY  Motor warming at low speed operation  Standard: Insufficient motor cooling working at low speeds due a self cooling design.  Vector: Perfect motor cooling at any speeds thanks to its active fan cooling system.  Low Torque performances working beyond the nominal speed  Standard: Not designed to work beyond the nominal speed: very limited constant power work.  Vector: Wide constant power working area. Very useful in winding applications  Poor acceleration response: Problems in dynamic applications  Standard: High rotor inertia values. Very poor dynamic performances.  Vector: Very good dynamic performances thanks to the optimisation of the rotor design ( Ø /length ratio)

7. Reservados todos los derechos por Vascat, S.A.  High maintenance costs: Limited expected life time  Standard: Fast degradation of winding and isolating materials due the high frequency voltage transitions.  Vector: Long life time thanks to the reinforced materials and vacuum impregnation.  Additional motor modifying costs  Standard: Require additional motor manipulation: not prepared to fit a feedback device for close loop operation (encoders, resolvers...), neither active fan cooling system for low speed operation.  Vector: Integrated active fan cooling system. Prepared to fit any feedback device.  Higher Current consumption and inverter size  Standard: It’s not possible to match the motor and application speed performances. There’s only two available winding codes: Start and delta connection.  Vector: Each motor can be manufactured with an specific winding code in order to exactly adjust de motor current consumption to the inverter current limits. TYPICAL PROBLEMS USING STANDARD MOTORS FOR INVERTER DUTY

8. Reservados todos los derechos por Vascat, S.A. PRICE: STANDARD MOTOR VS VECTOR MOTOR  Although the vector motors are more expensive than standard asynchronous motors, this price increment is widely compensated by their technical advantages.  In order to perform a right economical comparison between this two motor types, it will be necessary to take into account the total cost of each COMPLETE solution:  Additional modifying costs: Feedback and active fan installation.  Motor oversizing: Due the poor performances of the standard motors working with inverter duty.  Repair costs: Material degradation due to inverter duty work.  Inverter price: Vector motors can improve the inverter sizing through the right choice of the winding code

9. Reservados todos los derechos por Vascat, S.A. SECTORS & APPLICATIONS

10. Reservados todos los derechos por Vascat, S.A. CONCLUSIONS  Standard asynchronous motors are suitable for fixed speed applications and mains supply, vector motors are suitable for inverter duty and variable speed applications.  Main advantages of asynchronous vector motors:  No warming problems with low speed operation.  Wide constant power working range.  High dynamic response: low inertia.  High overload capacity.  Longer expected life time: repair & maintenance cost savings.  No need of motor modifications: Integrated encoder and active fan.  Reduction of inverter size: customised windings  Dimension savings: high power density