Automatic test fixture for frequency converter

Abstract

The invention relates to an automatic test fixture for a frequency converter. The automatic test fixture comprises a base and a workbench, wherein buffer devices are symmetrically arranged between the base and the workbench, a motor is installed on one side of the workbench, a movable seat in threaded connection with a threaded rod is fixedly installed below two movable plates, and clamping pieces are symmetrically installed on the opposite faces of the two movable plates. The device is simple in structure and novel in design, the threaded rod is driven by the motor to drive the two movable plates to move relatively, the grip drives the sliding block to further drive the clamping piece to move on the sliding groove, and therefore the device adapts to frequency converters of different specifications, and the application range of the device is widened; pressure on the frequency converter can be effectively buffered through the first spring and the second spring, the frequency converter is prevented from being excessively extruded and damaged, the frequency converter can be prevented from driving the workbench to move up and down through the buffer device, and the phenomenon of inaccurate test data caused by shaking of the frequency converter is further prevented.

Description

technical field [0001] This patent application belongs to the technical field of frequency converter testing equipment, and more specifically relates to an automatic test fixture for frequency converters. Background technique [0002] The frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the frequency of the motor's working power supply. The frequency converter is mainly composed of rectification (AC to DC), filtering, inverter (DC to AC), braking Unit, drive unit, detection unit, micro-processing unit, etc. The inverter adjusts the voltage and frequency of the output power supply by switching off the internal IGBT, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving energy saving and speed regulation. In addition, the inverter also has many protection functions, such as overcurrent, overvoltage, overload protectio...

AI Technical Summary

Problems solved by technology

[0003] However, the existing performance test bench used in the production and processing of frequency converters is inflexible in clamping the frequency converter, the operation is relatively complicated, and the frequency converter is easily damaged during clamping. The test is unstable, therefore, those skilled in the art provide an automatic test fixture for frequency converters to solve the problems raised in the above-mentioned background technology

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