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Cuando se trata de motores ¿Qué tan caliente es caliente?

Las temperaturas muy altas afectan la vida útil del motor

  • June 2011
  • Number of views: 4310
  • Article rating: 2.0

Jim Bryan
Especialista de Soporte Técnico de EASA (retirado)

Frecuentemente escuchamos decir a nuestros miembros, que uno de sus clientes le ha informado que un motor que había sido reparado, ahora se calienta. Nosotros siempre les preguntamos ¿Qué tan caliente? y por lo general responden “Bueno, no puedo mantener mi mano sobre él”.

Vamos a pensar un minuto en esta respuesta. La mano del ser humano típico, puede soportar una temperatura entre 60-65°C (140 -150°F), dependiendo de las callosidades, el dolor que pueda tolerar, cuantas personas estén observando, etc. Recuerden este número, mientras discutimos las temperaturas típicas de funcionamiento de un motor.

La norma NEMA MG1-2009 12.43 (ver Figura 1), define el aumento de temperatura para los motores a una temperatura ambiente máxima de 40 °C.

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EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual
  • Section 2: AC Machines

Related Reference and Training Materials

Principles of Medium & Large AC Motors (NEMA Standards)
  • Section 6: Motor Standards

Principles of Medium & Large AC Motors (IEC Standards)
  • Section 6: Motor Standards

Root Cause Failure Analysis
  • Section 3: Stator Failures
  • Section 4: Shaft Failures
  • Section 8: Synchronous Machine Failures

Fundamentals of DC Motors & Operation Tips
  • Section 8: Ventilation & Accessories

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