When the motor load is unbalanced or run for a long time, the bearing damage causes the oscillation amplitude to gradually increase. Therefore, the motor sensation test can effectively evaluate the operating condition of the motor. This article introduces the measurement method of motor sensation. Motor oscillation will accelerate the wear of the motor bearings, greatly reducing the normal service life of the bearings, and will announce a large noise during operation. Together, the motor oscillation will reduce the winding insulation. The motor sensation test can effectively check the current working condition of the motor and evaluate the working performance of the motor. 1, the composition of the sensation measurement system When measuring the sensation of the Range hood motor factory motor, it is best to cooperate with the motor test bench. The motor test bench can simulate various working conditions, and the sensation measured under different working conditions is more comprehensive. The sensation sensor is responsible for collecting sensation data, and the host computer software processes the data and displays it in the form of reports and curves. 2. Selection of the sensation sensor The sensation sensor converts the sensation parameter of the measured body into appropriate electrical parameters.
Currently it is widely used. The sensation sensor is an acceleration sensor. According to the principle of sensation sensors, there are the following: magnetoelectric sensors, piezoelectric sensors, resistive sensors, and capacitive sensors. According to the transmission method, it can be divided into: wired, wireless, and wireless sensors have the advantage of being convenient for installation and avoiding weak measurement signals. 3. Device of the tested motor In order to improve the measurement accuracy of the motor sensation, no other sensation disturbance signal is introduced, and the motor device should be ensured in a very firm tooling. In principle, an elastic device can be selected for a motor whose shaft center height does not exceed 450mm, and a rigid device should be selected when the shaft center height exceeds 450mm. 4. Motor sensation test point equipment General motor test point is 6 points. The detailed device orientation is shown in the figure below.
The total weight of the sensor and its accessories should be less than 1/50 of the gross weight of the motor. The sensor and the motor to be tested should maintain outstanding touch. The detection head can choose a magnetic base, an adhesive or a screw connection device. In order to facilitate construction, it is recommended to use a wireless sensation sensor. 5. Motor sensation limit In the host computer software, the sensation, current speed, shaft center height, test point orientation and other information are generally used to comprehensively evaluate the performance of the motor. Different shaft center motors have different requirements for sensation. Whether the measurement results meet the national standard requirements, please refer to ‘GB10068-2008 Measurement, Identification and Limitation of Mechanical Oscillation of Motors with Center Height of 56mm and Above’.
rangehoodes 