Temperature compensator of torque sensor

A temperature compensator of torque sensor including a pair of coils which are connected to an AC power supply circuit via transistors and in which inductances change in opposite directions depending on torque, and a torque detecting means arranged and constructed to obtain a voltage difference between a first voltage and a second voltage output via smoothing circuits based on changes in inductance of each of the pair of coils and outputs as a torque detection voltage, the temperature compensator comprising:

• a correcting voltage extracting means for extracting a voltage between terminals of a transistor in the AC power supply circuit as a temperature correcting voltage;
• and
• a correcting means for correcting the torque detection voltage based on a temperature correcting voltage extracted by the correcting voltage extracting means, wherein the correcting means records the relation in correspondence between the temperature correcting voltage and the temperature correcting value preliminarily in a memory, and when a temperature correcting voltage extracted from the correcting voltage extracting means is input into the correcting means, a temperature correcting value is computed based on the temperature correcting voltage input according to the relation in correspondence between the temperature correcting voltage and the temperature correcting value preliminarily recorded, wherein the torque detection voltage input by the correcting means separately is compensated according to the temperature correcting value.