Type test is a very complete test content in the motor products, is to evaluate the judgement of the product and the degree of conformity of the design scheme, and evaluate its effect with the final use. For some good motor manufacturers, will be for different conditions of use for the necessary simulation test, that is, as close as possible to the conditions of use, than the technical conditions under the conditions of the project more than the test content, in order to prevent the performance does not meet the requirements of the quality problems.
Under what circumstances should a type test be carried out on a motor?
Type test is to comprehensively assess and predict whether the characteristics and parameters of the motor meet the standard requirements in accordance with the provisions of the technical conditions of the product and the demand for the suitability of the actual working conditions. Type tests are generally conducted in the following cases:
Determine the performance of the prototype after the completion of the trial production of new products, in order to provide supportive data for the identification and further improvement of the design of the product.
Type test should be carried out for small batch trial production of products to verify that the process, tooling and structural design of the product can ensure stable product quality in batch production, and to check whether the new product has formed a production capacity.
● When the batch production of motors reaches the specified period of sampling test (generally not more than 2 years).
● When the inspection test data of multiple products show an impermissible deviation from the type test data.
● Application of new technologies, new processes, new materials, electromagnetic design of the product, mechanical structure, key materials and manufacturing process, may affect the product of certain performance changes.
˜The type test is also one of the important bases for product quality certification. When used as evidence for certification, the type test of the motor is carried out by a test organisation with relevant qualifications, such as the energy-saving certification of motor products carried out by the state, CQC safety certification and so on.
Type test items for general-purpose three-phase asynchronous motors
All inspection test items; the short circuit test in the motor inspection test has more measurement points in the type test, and in many inspection test equipments, the short circuit test of the motor has been carried out in accordance with the way of instantaneous collection, and there is a large inconsistency or even distortion in the test data.
Temperature rise test; it is a comprehensive test item of thermal performance and insulation aging test of the motor, and should be combined with different ambient temperatures for objective and reasonable evaluation in the testing process.
●Load test, mainly test motor efficiency, power factor and turnover rate and other force characteristics; especially for high-efficiency motors, the test method is particularly important, GB18613 for the efficiency of the provisions of the B-method test.
● Maximum torque, short-time over-torque test; mainly evaluates the motor’s overload capacity, the performance does not meet the requirements of the motor, it is likely to die in the test stage.
Determination of minimum torque of cage-type asynchronous motor; assessment of starting performance of the motor.
●Vibration and noise measurement; assessment of the motor’s operating characteristics.
●Over-speed test, to assess the mechanical properties of the rotor part, especially wire-wound rotor motors, the mechanical properties of the motor will be bad when the bag will be thrown.
Post time: Jan-12-2024
