| 摘要 |
An apparatus for monitoring the temperature of an inaccessible portion of an electrical current carrying device that cannot be directly measured easily comprises circuits for establishing a reference temperature value in the vicinity of the current carrying device and measuring the power dissipated in the current carrying device, a digital computer having ports for inputting the reference temperature value, the power dissipated in the current carrying device, the thermal resistances and thermal time constants of the thermal model simulating the current carrying device to the reference temperature, and a program stored in the digital computer for continuously calculating a differential temperature based upon the power dissipation and thermal model and adding the reference temperature thereto.
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