Double-motor backlash eliminating control device for alternating current servo system

Abstract

The invention discloses a double-motor backlash eliminating control device for an alternating current servo system, and relates to the technical field of mechanical control. The radial direction of a main gear is symmetrically meshed with two same pinion gears which are respectively connected with a group of same pinion gear transmission device; the two groups of pinion gear transmission devices are respectively connected with output ends of two groups of same first motor and second motor; the first motor and the second motor are respectively connected with a group of alternating current driver comprising a speed ring and a current ring; and a backlash eliminating control circuit is connected between the two groups of alternating current drivers. The double-motor backlash eliminating control device achieves the aim that the two alternating current servo motors have equal output torque, stable performance and energy conservation and overcome the defects of direct current motors.

Description

technical field [0001] The invention relates to the technical field of mechanical control, in particular to the technical field of a radar tracking servo system, a gun control servo system, and other dual-motor systems using AC servo. Background technique [0002] There are three main types of clearance methods: [0003] 1. Mechanical anti-backlash: [0004] Advantages: Introducing a preloaded torsion spring on the motor or high-speed gear to eliminate the backlash of the drive chain, commonly used double-leaf spring gears, etc. [0005] Disadvantages: complex processing, difficult to adjust, especially after the speed ratio of the reduction box is large, the number of turns of the torque spring is more and easily broken, and it is difficult to achieve the real purpose of eliminating backlash. [0006] 2. Parallel linear double-motor electro-backlash elimination: [0007] Advantages: Make the two motors maintain a fixed bias torque. When the load current is zero, the two ...

AI Technical Summary

Problems solved by technology

[0005] Disadvantages: complex processing, difficult to adjust, especially after the speed ratio of the reduction box is large, the number of turns of the torque spring is more and easily broken, it is difficult to achieve the real purpose of eliminating backlash

[0008] Disadvantages: Since the two motors cannot share the load current equally, one motor always has a large output torque and the other motor has a small output torque, so the utilization efficiency of the motor is reduced, and it is not energy-saving. economy

[0011] Disadvantages: Double-ladder type double-motor electric backlash elimination technology has been used in a small amount in DC servo systems

However, due to the inherent defects of the DC system, such as large volume and easy wear and tear of the brushes, it needs to be adjusted, maintained and replaced on a regular basis, and has a tendency to be gradually eliminated.

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