Patent ID: 8115425

Claim:
A driving apparatus which electrically drives first and second components built in an industrial instrument, the first component being configured to drive a first element, and the second component being configured to drive a second element at a velocity higher than that of the first component, the driving apparatus comprising: a housing including a supply inlet and an exhaust outlet; a fan configured to form an air current so that air is taken into said housing through said supply inlet and exhausted from inside said housing through said exhaust outlet; a driving circuit block which is accommodated in said housing so as to be cooled by the air current, and which includes a first driving circuit configured to electrically drive the first component, and a second driving circuit configured to electrically drive the second component, wherein said second driving circuit is inserted upstream of said first driving circuit along the air current in said housing; and a cooling unit configured to regulate a temperature of the air exhausted from inside said housing through said exhaust outlet so as to decrease a temperature difference between the air taken into said housing through said supply inlet and the air exhausted from inside said housing through said exhaust outlet.