Saturday, December 02, 2006
Geared motor is compact precision actuator
The TPM is a small and highly dynamic gearmotor developed as a product representing the highest level of integration. The TPM is a geared motor (rotary actuator) based on an AC servomotor and high-precision planetary gearing. The size of this compact unit is less than half compared with a conventional motor and gear combination.
The TPM rotary actuator is characterised by an extremely high dynamic response: with an overall length of 186mm, the TPM 50 builds up a maximum output torque of 500Nm at a mass moment of inertia of 2.9kgcm2 - until now impossible values.
This high dynamic response is due to the considerable reduction in the moment of inertia: the mass moment of inertia of the actuator has simply been reduced by 50% compared with a conventional solution with separate motor and gear unit.
The reason lies in its design: the rotor inertia is considerably reduced by the low-speed motor and the mass inertia on the gear side is reduced by around 90% because the gear pinion is directly integrated into the motor shaft, thus eliminating the need for a clutch.
For example, with a load inertia of 150kgcm2 at the output, loads can be moved through 180 degrees with utmost precision in less than 150ms.
The TPM rotary actuator is characterised by an extremely high dynamic response: with an overall length of 186mm, the TPM 50 builds up a maximum output torque of 500Nm at a mass moment of inertia of 2.9kgcm2 - until now impossible values.
This high dynamic response is due to the considerable reduction in the moment of inertia: the mass moment of inertia of the actuator has simply been reduced by 50% compared with a conventional solution with separate motor and gear unit.
The reason lies in its design: the rotor inertia is considerably reduced by the low-speed motor and the mass inertia on the gear side is reduced by around 90% because the gear pinion is directly integrated into the motor shaft, thus eliminating the need for a clutch.
For example, with a load inertia of 150kgcm2 at the output, loads can be moved through 180 degrees with utmost precision in less than 150ms.
# posted by Medical Information : 1:21 AM
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