Supercharge Your Innovation With Domain-Expert AI Agents!

Linear motor controlled by three-terminal, two-way thyristor switch component and phase-locked loop

A technology for controlling linear and electric motors. It is used in AC motor control, control systems, electrical components, etc., and can solve problems such as machine damage, wrong timing transistors, and weakening of line clutter.

Inactive Publication Date: 2005-03-16
罗伯特・W・莱德里克
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Triac controllers (Ref. 2) provide a low-cost method of controlling the amplitude of the reciprocating motion of a linear motion AC motor (Ref. 1), but the prior art suffers from the disadvantage that if the peak pulse voltage is high enough Impulse response to power clutter on the AC power line when the power line voltage crosses zero volts DC
If a linear motor drives a free piston machine such as a STIRLING refrigerator, incorrect timing of triode activation can result in damage to the machine and / or loss of amplitude control
[0003] Electronic filtering of the line voltage can attenuate line clutter, but the line clutter pulses suppressed by filtering occur at places usually very close to zero crossings, at which point it is impractical not to generate false zero crossings

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Linear motor controlled by three-terminal, two-way thyristor switch component and phase-locked loop
  • Linear motor controlled by three-terminal, two-way thyristor switch component and phase-locked loop
  • Linear motor controlled by three-terminal, two-way thyristor switch component and phase-locked loop

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] refer to figure 1 , a linear motor (MOTOR) with terminals M1 and M2 and a triac with main terminals MT1 and MT2 and a gate terminal G connected in series across the AC power line with terminals L1 and L2. A start pulse applied to G causes the triac to actually short out across the motor. After start-up, the triac remains short circuited until the current (I) drops to zero, whereupon the triac effectively becomes an open circuit, waiting for the next start pulse. The control of the reciprocating motion amplitude of the motor in the present invention is realized by controlling the generation time of the starting pulse according to the zero crossing of V. If the start pulse time before V zero crossing is short according to the period of V, the triac remains shorted for only a fraction of the AC period and the motor amplitude is small. As the time between the start pulse and the next zero crossing of V increases, i.e. when the start pulse progressively leads V in phase, f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A Triac and a phase-locked loop are used to control the amplitude of reciprocation of an AC linear motor. The phase locked loop generates a square wave that is synchronized with an AC power source but is substantially isolated from electrical noise on the power source. The phase of the square wave is varied with an amplitude control signal, and Triac firing pulses are generated at the transitions of the square wave.

Description

technical field [0001] The present invention is an invention in the general field of motor control. In particular, the present invention uses a triac and a phase-locked loop to control the amplitude of the reciprocating motion of a linear motion AC motor. Using this method, pulses of power line clutter have little effect on the amplitude or phase of the reciprocating motion. . Background technique [0002] Triac controllers (Ref. 2) provide a low-cost method of controlling the amplitude of the reciprocating motion of a linear motion AC motor (Ref. 1), but the prior art suffers from the disadvantage that if the peak pulse voltage is high enough Impulsive response to power clutter on the AC power line that causes the power line voltage to cross zero volts DC. Prior art treats false zero crossings as if they were normal zero crossings, and because the triac start pulses generated by prior art triac control are timed relative to power line voltage zero crossings, line clutter ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G05F5/00H02P23/00H02P25/06
CPCH02P23/0059H02P25/06G05F5/00H02P23/186H02P25/062H02P25/064
Inventor 罗伯特·W·莱德里克
Owner 罗伯特・W・莱德里克
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com