Calculate the heating time constant of the machine if the thermal capacity (c) of the machine is 16 watts/℃ and heat dissipation constant value (D) is 4 watts/℃.(a) 6 sec(b) 7 sec(c) 4 sec(d) 9 secThis question was posed to me during an interview for a job.Origin of the question is Motors Rating and Heating topic in chapter Rating and Heating of Motors of Electric Drives

Calculate the heating time constant of the machine if the thermal capa

1.	Calculate the heating time constant of the machine if the thermal capacity (c) of the machine is 16 watts/℃ and heat dissipation constant value (D) is 4 watts/℃.(a) 6 sec(b) 7 sec(c) 4 sec(d) 9 secThis question was posed to me during an interview for a job.Origin of the question is Motors Rating and Heating topic in chapter Rating and Heating of Motors of Electric Drives
Answer» Correct option is (c) 4 sec Best EXPLANATION: The HEATING time constant of the machine is the ratio of the THERMAL capacity of the machine and heat dissipation constant value. τ = c÷D = 16÷4 = 4 sec.

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