Direct-current motor dynamometer

Abstract

The invention provides a direct-current motor dynamometer. The direct-current motor dynamometer comprises a dynamometer main body and a tool. The dynamometer main body comprises a case and also comprises an industrial control computer, a load instrument, a program control digital multimeter and a power supply which are arranged in the case. The load instrument, the program control digital multimeter and the power supply are electrically connected with the industrial control computer. The tool comprises a supporting plate, a motor base arranged on the supporting plate, a motor arranged on the motor base, a sensor used for measuring the rotating speed of the motor, and a motor supporting base used for supporting the measured motor. A rotating shaft of the motor and a rotating shaft of the measured motor are on the same straight line, and an end part of the rotating shaft of the motor is provided with a coupling for connecting the rotating shaft of the measured motor. The motor, the measured motor and the sensor are electrically connected with the program control digital multimeter, and the motor is also electrically connected with the load instrument. The direct-current motor dynamometer has the advantages of low cost and accurate measurement result.

Description

technical field [0001] The invention relates to the field of motor dynamometers, in particular to a DC motor dynamometer. Background technique [0002] The current DC motor dynamometers on the market directly use the torque sensor to connect the motor under test through the coupling as the load. There are following defects and deficiencies in this technology: [0003] Due to the need to use high-precision torque sensors, equipment manufacturing costs are high; [0004] Due to the greater influence of the accuracy of the torque sensor and the concentricity of the coupling connected to the motor, the current test results of this equipment deviate greatly from the actual situation; [0005] Measurement errors are further amplified by asynchronous errors between the torque sensor and the rotational speed sensor (usually a rotary encoder) used to measure the rotational speed. [0006] And if a motor is used instead of the torque sensor, and the motor is connected to the motor ...

AI Technical Summary

Problems solved by technology

[0003] Due to the need to use high-precision torque sensors, equipment manufacturing costs are high;

[0004] Due to the greater influence of the accuracy of the torque sensor and the concentricity of the coupling connected to the motor, the current test results of this equipment deviate greatly from the actual situation;

[0005] Measurement errors are further increased due to asynchronous errors between the torque sensor and the rotational speed sensor (usually a rotary encoder) used to measure the rotational speed

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