Permanent magnet linear launch device

Abstract

The invention provides a permanent magnet linear launch device, which comprises a launch platform device, permanent magnet linear motors and a support platform used for supporting the launch platform device and the permanent magnet linear motors. Primary stages of the permanent magnet linear motors are arranged on the support platform; secondary stages of the permanent magnet linear motors are arranged on the launch platform device; a launch platform support plate used for supporting the launch platform device is arranged on the support platform, and the launch platform device can move relative to the launch platform support plate in the length direction of the launch platform support plate; two permanent magnet linear motors are arranged, i.e. a first permanent magnet linear motor and a second permanent magnet linear motor; the primary stage of the first permanent magnet linear motor and the primary stage of the second permanent magnet linear motor are arranged on both sides of the support platform symmetrically; the secondary stage of the first permanent magnet linear motor and the secondary stage of the second permanent magnet linear motor are arranged on both sides of the launch platform device symmetrically. The longitudinal space for launching is saved, and the efficiency of the permanent magnet linear launch device, and the stability and safety in the launching process are improved.

Description

technical field [0001] The invention relates to an electromagnetic ejection device, in particular to a permanent magnet linear ejection device driven by a permanent magnet linear motor. Background technique [0002] Electromagnetic ejection refers to a launch method in which the launched object does not use its own power device, but uses electromagnetic force as the means of acceleration, and relies on the power given by the launcher to obtain sufficient kinetic energy to achieve launch. Compared with other launch methods such as gunpowder propulsion, the projectile launched by electromagnetic ejection is not only faster and has a longer range, but also relies on advanced power electronic devices, and the process of electromagnetic launch can be fully controlled. Due to the use of electric drive, by adjusting the magnitude of the current, the electromagnetic catapult can not only launch light loads as small as several kilograms, but also propel heavy loads as large as severa...

AI Technical Summary

Problems solved by technology

The ejection equipment of an active aircraft carrier is a steam catapult, but it is composed of a launch system, a steam system, a towline tensioning system, a lubrication and a control system, etc., and is bulky and complex

This makes it have some inevitable defects from the beginning: (1) high cost of use, low efficiency, many supporting facilities, cumbersome system, and high requirements for each link; (2) high maintenance cost, frequent and cumbersome replacement of sealing strips , has higher requirements on materials; (3) consumes a lot of fresh water

[0003] Most of the electromagnetic ejection currently used is a linear induction motor, which drives the armature connected to the aircraft. In order to achieve the required thrust, the primary is often made very long, and in order to achieve high-speed electromagnetic ejection, the primary pole distance is designed to be relatively large. , which not only requires more space but also wastes a lot of copper, making the entire ejection system less efficient, which is an unreasonable choice for occasions with high space requirements or frequent ejections

In addition, if the position sensor is placed on the primary during operation, not only will a set of position sensors be required under each pair of poles, but also how to switch the signals between each set of position sensors will be very difficult. If a magnetic scale or grating is used The ruler will greatly increase the cost of the ejection device, and the lead wire of the power supply will be a big problem

Patent No. ZL201310005736.3 describes an active magnetic levitation electromagnetic launcher, which uses active magnetic levitation support technology to launch the carrier-based aircraft platform, and uses a high-power linear induction motor to drive the launch platform. Although the mechanical support is abandoned, a huge levitation magnet and The suspension control system increases the cost of the entire ejection system, and operates at high speeds, putting forward higher requirements for suspension control

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