Brushless DC Motors (Nanotec)
Electronically commuted 3-phase motors (EC motors) are especially well suited for applications requiring quiet running characteristics and a long service life. The high-energy permanent magnets allow high acceleration rates, combined with very high efficiency and speeds of up to 14,000 rpm. The rotor position is fed back electronically by three Hall sensors offset by 120°. Together with an encoder, BLDC motors can also be used in applications requiring precise positioning.
Advantages:
- Higher efficiency and power density than induction motors (approx. 35% volume and weight reduction with the same output)
- Long service life and quiet running thanks to precision ball bearings
- Wide speed range with full motor output due to linear torque curve Reduced electrical interference emission
- Mechanically exchangeable with stepper motors, hence less construction expense and greater parts variety
INTERNAL ROTOR MOTORS
In internal rotor motors, the rotor with the permanent magnets rotates on a shaft inside a stationary stator with coils. Their benefits lie in their lower rotor inertia and their better dissipation of heat losses. They are particularly suitable for high speeds.
EXTERNAL ROTOR MOTORS
External rotor motors are shorter than internal rotor motors and offer a cost-effective solution particularly for large series. In these motors the permanent magnets are mounted on the rotor housing which rotates around the internal stator with the windings. Thanks to the higher inertia of the rotor, external rotor motors have a lower torque ripple than internal rotor motors.
SLOTLESS MOTORS
In slotless motors, the stator consists of ring-shaped plates with a flat winding on the inside. The inductance of these motors is very low, but the current in the windings rises very rapidly. They offer high power density combined with compact size.
BRUSHLESS MOTORS IP65
Nanotec offers BLDC motors with protection class IP65 in three sizes. All motor series are equipped with a magnetic incremental encoder which is insensitive to rugged industrial environments and requires no additional Hall sensors.
- 160 W – 400 W rated power
- Rated speed: 3,000 U/min – 6,000 U/min
- Encoder resolution: 1,024 CPR – 2,500 CPR
- With connectors or cable
- Matching controllers/drives and planetary gearboxes available
