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Method for accurately controlling starting process of direct-current torque motor

A technology of DC torque motor and starting process, which is applied to the starter of a single DC motor, DC motor speed/torque control, motor generator/starter, etc. and other problems, to achieve the effect of improving system reliability, accurate calculation data, and simple implementation method.

Active Publication Date: 2021-04-16
HEBEI HANGUANG HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among them, the brush motor has low cost, simple structure, large starting torque, wide speed range, easy control, and needs maintenance, but it is easy to maintain (replace the carbon brush), It will generate electromagnetic interference and have requirements for the environment
[0006] The starting process of DC torque motor is divided into five parts: starting, accelerating, running, decelerating and stopping, among which starting is the first part of DC torque motor. If the starting torque If it is too large, it will cause the servo system to fail to start, or the start time is too long, which will bring problems such as false alarms to the system

Method used

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  • Method for accurately controlling starting process of direct-current torque motor
  • Method for accurately controlling starting process of direct-current torque motor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1, infrared imaging seeker optical cabin, course motor parameters:

[0039] Armature resistance: (21±2.7)Ω (at 20°C)

[0040] Maximum no-load speed

[0041] When the voltage is 22.5V, the no-load speed in the positive and negative directions is (410±41)r / min.

[0042] Continuous stall torque and continuous stall voltage

[0043] When the motor is supplied with a continuous locked-rotor current of 1.06A,

[0044] Continuous stall torque ≥ 0.48N.m

[0045] The continuous locked rotor voltage is (22.5V±2.3)V

[0046] Stall torque sensitivity: ≥0.45N.m / A

[0047] Starting voltage

[0048] No-load starting voltage ≤ 1.5V, forward and reverse starting voltage difference ≤ 0.2V

[0049] Torque fluctuation coefficient: ≤10%

[0050] Electrical time constant: ≤1ms (reference value)

[0051] Specific control process figure 1 as shown, figure 1 Program flow chart of the control process of the heading installation angle during the motor startup process

[005...

Embodiment 2

[0069] Embodiment 2, the optical cabin of the infrared imaging seeker, the pitch motor parameters are as follows:

[0070] Armature resistance (36±4.5)Ω(at 20℃)

[0071] Maximum no-load speed(r / min)

[0072] When the voltage is 60V, the no-load speed in the forward and reverse directions is (580±58)r / min.

[0073] Continuous stall torque and continuous stall voltage

[0074] When the motor is supplied with a continuous locked-rotor current of 0.64A,

[0075] Continuous stall torque ≥ 0.56N.m

[0076] The continuous locked rotor voltage is (25±2.5)V

[0077] Peak stall torque and peak stall voltage

[0078] When the peak locked rotor current is 1.54A,

[0079] Peak stall torque ≥ 1.35N.m

[0080] The peak stall voltage is (60±6)V

[0081] Stall torque sensitivity ≥ 0.875N.m / A

[0082] Starting voltage: no-load starting voltage ≤ 1.9V, forward and reverse starting voltage difference ≤ 0.15V

[0083] Torque fluctuation coefficient: ≤7%

[0084] Electrical time constant...

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Abstract

The invention discloses a method for accurately controlling the starting process of a direct-current torque motor, and aims at the problem of large starting torque of the direct-current torque motor. The method comprises firstly, the starting position angle of the motor is determined according to various performance indexes of a system, then whether the motor is started or not is judged, and if not, a master command is controlled to adopt proportional and integral output; meanwhile, a selection method of proportion and integral parameters is given; amplitude limiting processing is carried out on the control master command; and finally, after the motor is started, the motor is controlled to rotate at a stable speed through fixed master command output. The method can be used to effectively ensure that the direct-current torque motor is normally started within the specified time, and the system reliability is improved. The method has the advantages of being simple in implementation method, accurate in calculation data, effective in engineering practice and the like.

Description

technical field [0001] The invention relates to the technical field of servo control system motor control, in particular to a precise control method for the starting process of a DC torque motor. Background technique [0002] At present, in domestic products such as seeker servo platforms and photoelectric trackers, DC torque motors are mostly used as actuators. DC torque motors are ideal for direct drive servo applications, while minimizing size, weight, power and response time. while maximizing speed and position accuracy. The DC torque motor provides a servo drive that can be directly connected to the driven load. [0003] DC torque motor can provide ultra-low speed and high torque for ideal positioning and speed control system, or high response speed and optimal torque; it has the following characteristics: frameless installation mode and optional large torque range; high Torque to inertia ratio for fast start / stop and high acceleration; high torque to power ratio for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/18H02P7/00
Inventor 周腊梅崔雪兵孟凡强
Owner HEBEI HANGUANG HEAVY IND
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