Motor type testing is a comprehensive testing project that evaluates the consistency between the product and design, as well as its application effectiveness. Better motor manufacturers, on the other hand, will conduct necessary simulation experiments based on different working environments, that is, to conduct more tests that closely resemble the actual working environment to the maximum extent possible, in order to avoid product quality problems caused by substandard performance.

1. Under what conditions should the motor type test bench be conducted?

Testing is a comprehensive prediction of the performance, performance, and performance of a product based on its technical specifications and the applicability of production processes. Type testing is usually conducted under the following conditions:

After the testing of the new product is completed, the performance of the sample is tested to determine the finalization and improvement of the product, which serves as auxiliary information.

During the trial production of small batches of products, type tests should be conducted to verify the process, tooling, and structural design of the products, to ensure stable quality of the mass-produced products, and to test whether the new products have formed production capacity.

When the batch production of motors reaches the specified sampling period (generally not exceeding 2 years).

When there is an unacceptable deviation between the inspection and testing data of multiple products and the type testing data.

When applying new technologies, processes, and materials to the electromagnetic design, mechanical structure, key materials, and manufacturing processes of a product, which may affect certain performance changes of the product.

The motor type test bench is also an important basis for product quality certification. When used as certification evidence, the type test of the motor shall be conducted by qualified testing institutions, such as the national energy-saving certification of motor products and CQC safety Full authentication, etc.

2. General purpose of motor type test bench

All inspection and testing items; In the short circuit test of motor inspection and testing, there are many measuring points selected in the type test. In many inspection and testing equipment, the short circuit test of the motor has been carried out in an instantaneous manner, and the test data has a large degree of inaccuracy or even distortion.

Temperature rise test; It is a comprehensive test project for the thermal performance and insulation aging of motors. During the testing process, an objective and reasonable evaluation should be made based on different environmental temperatures.

Load test, mainly testing the motor efficiency, power factor, slip rate and other force and energy characteristics; Especially for high The testing method is particularly important for high-efficiency motors.

Maximum torque and short-term over torque test; The main evaluation is the overload capacity of the motor. Motors that do not meet the performance requirements are likely to die during the testing phase.

Measurement of small torque for cage asynchronous motors; Assess the starting performance of the motor.

Vibration and noise measurement; Assess the operational characteristics of the motor.

Overspeed test is conducted to assess the mechanical performance of the rotor part, especially for wound rotor motors. When the mechanical performance is poor, there may be package shaking.

The above items are the basic conditions for motor testing. Based on the characteristics of current testing instruments, variable frequency power supply is selected for the testing power supply, which can perform various frequency tests. However, for power frequency motors that start directly, it is common for them to pass the type test but fail to start in practical work, which is also a problem that motor manufacturers need to consider.

Also, many motor manufacturers have not fully mastered frequency testing technology, or conduct frequency testing based on frequency testing technology, and the results often have deviations.