Motor counter electromotive force testing device

The utility model relates to the technical field of motor testing, in particular to a motor back electromotive force testing device, which comprises a frame provided with a first via hole; the test tool is mounted on the rack and is provided with a second via hole communicated with the first via hole; the tested motor is mounted in the test tool, and an output shaft of the tested motor extends out of the second via hole; the supporting plate is movably mounted on one side, far away from the testing tool, of the rack through a telescopic assembly; the clamping assembly is rotationally mounted on the supporting plate through a bearing and moves in the direction of stretching out of or retracting into the first via hole under the action of a telescopic assembly; the output shaft of the opposite supporting motor is in transmission connection with the clamping assembly, and the opposite supporting motor is used for driving the clamping assembly and the output shaft of the tested motor to rotate; in conclusion, by