| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric pump capable of restricting reduction of magnetostriction quantity caused by temperature fall of a super-magnetostrictive element by keeping temperature of the super-magnetostrictive element as a drive source for a piston to discharge fluid by reciprocating action at a prescribed value or more. SOLUTION: In an electric pump 1 using a super-magnetostrictive element 9 which is elongated by application of a magnetic field as a drive source for a piston 5 to discharge fluid by reciprocating action, it is provided with a temperature sensor 30 to detect temperature of the super-magnetostrictive element 9, a heating means H to heat the super-magnetostrictive element 9, and a control device 33 to actuate the heating means H based on an output of the temperature sensor 30.
|
