Linear motor thrust measuring device and measuring method

Abstract

The invention provides a linear motor thrust measuring device and a linear motor thrust measuring method. The linear motor thrust measuring device comprises a linear motor and a test platform, whereinthe linear motor comprises a stator and a rotor, and the rotor is fixed on a first sliding block and can linearly move on a first rail relative to the stator along with the first sliding block; a second rail is arranged on the test platform, and the stator is fixed on the second sliding block and can slide along the second rail along with the second sliding sheet; baffles are fixedly arranged atthe two ends of the stator respectively, force sensors are arranged between the baffles and the stator end, the stator is clamped between the two force sensors, the two force sensors are used for detecting counter-acting forces, and therefore electromagnetic thrust of the linear motor is obtained. The linear motor thrust measuring device is simple in structure, the force sensors are static in themeasuring process, extra drag chain wire arrangement is not needed, the loss of the force sensors is small, and the measuring device can be used for measuring the electromagnetic thrust of a no-load linear motor and can further be used for measuring the electromagnetic thrust when a rotor is loaded with a load.

Description

technical field [0001] The invention belongs to the technical field of linear motors, and in particular relates to a linear motor thrust measuring device and a measuring method. Background technique [0002] In the field of modern processing industry, high-speed and high-precision linear motion is required in many occasions such as high-speed grinding machines and precision lathes. There are two main methods to obtain linear motion, one is to convert the rotary motion into linear motion by driving the mechanical transmission mechanism through a rotating motor; the other is to directly use a linear motor to drive. The former has disadvantages such as large inertia, high friction, and low repeat positioning accuracy. Therefore, linear motor technology has attracted more and more attention in recent years. [0003] A linear motor is a power device that directly converts electrical energy into mechanical energy for linear motion. The driving performance of the linear motor mai...

AI Technical Summary

Problems solved by technology

The problems of this measurement method are: (1) due to the transmission and control of the signal, the force sensor is connected to the input and output lines, and the movement of the force sensor during the test will inevitably require additional towline management, which will increase the cost and increase The complexity of the measuring device; (2) The working principle of the force sensor is generally that the strain material is deformed under the action of force to cause changes in electrical signals, etc. The continuous reciprocating motion of the force sensor will affect the sensitivity of the strain material to deformation, and it is easy to fatigue. Thereby reduce the measurement accuracy of force sensor, also cause force sensor loss simultaneously, reduce its service life; (3) all comprise in the above-mentioned measuring device and be used for applying the load of braking force to linear motor to be measured, be referred to as braking force load in the present invention, For example, CN203116897U is a heavy object connected with a traction rope that goes around the pulley, CN107314851A is a load linear motor composed of a rotary servo motor, a ball screw and a nut, and CN110160696A is an accompanying linear motor. The sensor is connected to the mover of the linear motor to be tested, which is different from placing the actual load on the linear motor in the actual application of the linear motor. Therefore, the measuring device provided in the above patent document cannot measure the thrust measurement when the load is placed above the linear motor in actual application.

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