Velocity measurement system and method for ultra-high-speed linear motor
A linear motor, ultra-high-speed technology, applied in the direction of using a device that measures the time required to move a certain distance, can solve the problems of low speed measurement accuracy, limited speed measurement distance, and large transmission delay.
Active Publication Date: 2021-10-19
HIWING TECH ACAD OF CASIC
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[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a speed measurement system and method for ultra-high-speed linear motors, which can solve the problems of large transmission delay, low speed measurement accuracy and limited speed measurement distance in the above-mentioned prior art
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[0041] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, for purposes of explanation and not limitation, specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details.
[0042] It should be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related to the solution according to the present invention are shown in the drawings, and the steps related to the present invention are omitted. Invent other details that don't really matter.
[0043] figure 1 A block diagram of a speed measurement system for an ultra-high-speed linear motor provided by an embodiment of the present invention. ...
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The invention relates to the technical field of motor speed measurement, and discloses a speed measurement system and method for an ultra-high-speed linear motor. The system includes: a plurality of detection devices arranged on both sides of the superconducting coils arranged in double rows in the ultra-high-speed linear motor, and the detection devices on each side are used to detect the moving distance of each superconducting coil in the corresponding row of superconducting coils, And when the motion distance of the detected superconducting coil exceeds a predetermined distance, a pulse corresponding to the detected superconducting coil is generated, and for each column of superconducting coils, each detection device of the corresponding column outputs a group of pulses; the controller , used to receive multiple sets of pulses output by multiple detection devices, based on the pole pitch of the superconducting coil and the distance between the two detection devices that the superconducting coil passes successively, perform multiple differential iterative calculations on multiple sets of pulses, and based on multiple The speed of the ultra-high-speed linear motor is calculated by using the pulse obtained after the second difference iterative operation and the calculated pulse time difference. This can realize non-contact high-precision speed measurement of ultra-high-speed linear motors.
Description
technical field [0001] The invention relates to the technical field of motor speed measurement, in particular to a speed measurement system and method for an ultra-high-speed linear motor. Background technique [0002] In the high-speed control of linear motors, the speed measurement system is very critical, which involves converting the real-time position of the mover into the electrical angle required for linear motor control, and then using vector control and other control strategies to drive and control the linear motor. [0003] At present, high-speed linear motors are mainly used in maglev transportation, electromagnetic propulsion and other fields. Conventional non-contact speed measurement methods include cross-induction loop speed measurement method, "polar distance detection + beacon" speed measurement and positioning method, microwave speed measurement and positioning method, and counting sleepers. Speed measurement and relative positioning speed measurement met...
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IPC IPC(8): G01P3/66
CPCG01P3/66
Inventor 季旭毛凯张艳清马逊韦克康张庆杰康颖王岩
Owner HIWING TECH ACAD OF CASIC