The present invention relates to the technical field of frequency
converters, and in particular to a frequency converter testing device. The frequency converter testing device comprises: a testing
assembly, which comprises a box body, an accommodating cavity arranged in the box body, and a back plate disposed inside the accommodating cavity; a locking
assembly, which comprises a sliding block disposed on the outer wall of the back plate and a movable frame disposed inside the box body; and an adjustment
assembly, which comprises fixing plates disposed inside the accommodating cavity and a plurality of engagement blocks disposed on the outer wall of each fixing plate. In the present invention, by means of the provision of the box body, a testing box, a main control board, a 24V stabilized
voltage supply and an automatic take-up device are assembled within the box body to form an integrated device, thereby facilitating long-term preservation and storage and improving the stability of the device during use; a retractable seat backrest is additionally provided, when the back plate extends by means of pushing a
handle, a cover plate can be locked by means of a pin shaft, and the height of the back plate can be adjusted on the basis of requirements; and when testing is required, the
handle is pushed reversely, such that the back plate can retract into the accommodating cavity, and the cover plate is unlocked, thereby facilitating the opening of a
toolbox for testing.