[Problems to be Solved] In a retarder equipped with an induction motor, eliminating the requirement of a rotation speed sensor for detecting a rotation speed of the induction motor. [Means for Solving the Problems] In a retarder (10) formed of an induction...

[Problem to be solved] An electric heating device suitable for heating an electric vehicle and having a novel structure is provided. [Solution] An electric heating device (100) includes: an electric motor that includes a stator (10) having a plurality of s...

A disk brake device has a rotor (4) having a braking surface (4a), a caliper, an outer pad and an inner pad (43) each disposed to face the braking surface (4a), and a braking operation mechanism which is caused to perform an operation of pressing the two p...