EXHIBIT 23.1
 
                       CONSENT OF INDEPENDENT ACCOUNTANTS
 
    We consent to the incorporation by reference in the registration statement
of Advanced Energy Industries, Inc. on Form S-3 (File No. 333-34039) of our
report, dated August 12, 1997, on our audit of the consolidated financial
statements of Tower Electronics, Inc. for the year ended September 30, 1996
which report is included in this Form 8-K/A No. 1.
 
Coopers & Lybrand L.L.P.
 
Minneapolis, Minnesota
September 16, 1997