Linear electric motor mechanical characteristic test system and method

Abstract

A test system and a method used for testing the mechanical properties of a linear motor belong to the technical field mechanical property detection of linear motors. The system includes two parts of a data acquisition platform and a data processor, wherein the data acquisition platform includes a pressure transducer and a displacement transducer which are linked with the output end of the linear motor, as well as a data acquisition card which is connected with the pressure transducer for acquiring a pressure signal and also connected with the displacement transducer for synchronously acquiring a displacement signal. After the acquired signals are processed by the data processor, the relation curve between the speed and output force of the linear motor and relative output characteristics thereof are obtained. The system is simple in structure and highly efficient in acquiring the output force and displacement quantity of the linear motor, and directly and effectively reflects the characteristic relation between the push power and speed of the linear motor and the output characteristics thereof.

Description

technical field [0001] The invention discloses a testing system and method for analyzing the mechanical characteristics of a linear motor, and belongs to the technical field of linear motor performance detection. Background technique [0002] Ultrasonic motor is a new type of motor that uses the inverse piezoelectric effect of piezoelectric ceramics to convert electrical energy into mechanical vibration energy of elastic body, and is driven by friction. As a brand-new energy conversion device, it has the advantages of low speed and high torque, small size, light weight, high power density, fast response, micro displacement, not affected by electromagnetic field, self-locking when power off, large degree of design freedom, etc. , It has a wide range of applications in aerospace, medical equipment, precision instruments, finishing and other fields. The development of ultrasonic motors has only a history of more than 20 years. Early research focused on the development of new ...

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Problems solved by technology

In the test, in order to apply load to the motor, the movement direction of the screw guide rail is opposite to the movement trend of the motor. Since the primary of the linear motor and the lead screw are directly connected by a pressure sensor, the actual movement of the primary motor is the same as that of the lead screw guide rail. Similarly, the test system cannot test the running speed of the linear motor, but can only test the running speed of the screw guide rail that is opposite to the direction of motion of the motor.

The test method of the system determines that it cannot measure the output force and running speed of the motor at the same time, let alone analyze the start and stop characteristics of the motor

The response speed of the ultrasonic motor is fast, and its mechanical characteristics are greatly affected by the external load, so the above-mentioned test system cannot test the relationship between the output force and speed of the linear ultrasonic motor and its mechanical characteristics

At present, there is no report on the mechanical characteristics test system of ultrasonic motors, so it is necessary to develop a test system capable of testing the mechanical characteristics of linear ultrasonic motors

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