Integration shrinks geared motor size.(Alpha Gear Drives Inc. launched TPM rotary actuator)

Electronic Design, June, 2006 by Maliniak, Lisa

The TPM, a highly integrated geared motor (rotary actuator), is based on an ac servo motor and high-precision planetary gearing. This compact unit is less than half the size of a conventional motor and gear combination. Developed by Alpha Gear Drives, the TPM rotary actuator has an extremely high dynamic response.

With an overall length of 186 mm, the TPM 50 builds up a maximum output torque of 500 nm at a mass moment of inertia of 2.9 kg[cm.sup.2]. The company claims that the dynamic response is due to the considerable reduction in the mass moment of inertia of the actuator, which has been reduced by 50% compared with a conventional solution with separate motor and gear unit. Alpha Gear Drives designed the TPM so the low-speed motor decreases the...

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