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Method for operating a two-phase rotary current controller

An operation method and controller technology, applied in control systems, AC motor control, starters of single multi-phase induction motors, etc., can solve problems such as different root mean square values ​​of currents, etc., to reduce related costs and reduce startup costs. Effect of current and torque

Active Publication Date: 2007-06-27
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A side effect of this simplified two-phase three-phase controller is that the rms values ​​of the currents in the two controlled outer conductors are different from each other despite the same phase grid angle

Method used

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  • Method for operating a two-phase rotary current controller
  • Method for operating a two-phase rotary current controller
  • Method for operating a two-phase rotary current controller

Examples

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Embodiment Construction

[0016] In the prior art, a three-phase controller can be used, for example, to perform phase gate control on an asynchronous motor. Only the control method of the three-phase controller has the possibility of modification. Among them, the control of the three-phase controller is realized by its own control unit, and the control method of the three-phase controller can be realized by changing the control method of the three-phase controller. A method of operating a three-phase controller. Since the control unit usually includes a microprocessor or microcontroller in addition to measuring units such as current transformers and the like, the above-mentioned changes are mainly made through a computer program running in the microprocessor or microcontroller. Or any other form (such as a hard-wired circuit).

[0017] In the following embodiments, the outer conductors L1 and L3 are, for example, controlled outer conductors, and the outer conductor L2 (arranged in the middle from a struct...

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Abstract

The invention relates to a method for operating a two-phase rotary current controller. In order to optimize the operation of a two-phase rotary current controller, magnitudes of a parameter that can be varied in both controllable phases of a two-phase rotary current controller is matched in these phases. In particular, the existing principle of phase-symmetric control with a uniform ignition delay in both controlled outer conductors is abandoned, and a separate ignition delay is stipulated for each of the two controlled outer conductors.

Description

Technical field [0001] The invention relates to an operating method of a two-phase three-phase controller. In addition, the present invention also relates to a two-phase three-phase controller. Background technique [0002] The three-phase controller is used for metering the electric power fed to an electric load, especially an asynchronous motor, according to the principle of phase gating. By metering the power fed to the asynchronous motor, the starting current and starting torque can be reduced, thereby realizing the so-called soft start. The standard used for dosing is the so-called trigger delay α, also known as "Delay". A half-wave of pole-changing current flows through the load connected to the output terminal of the three-phase controller, and there is a non-current time interval determined by the phase grid between every two successive current half-waves. [0003] The power part of a three-phase controller usually has three sets of anti-parallel thyristors. As the rated ...

Claims

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Application Information

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IPC IPC(8): H02P1/28H02M5/257H02P21/22H02P23/07H02P27/02
CPCH02M5/2573G01R31/343G01R31/42H02M5/22H02P27/06H02P1/28
Inventor 格尔德·格里彭特罗格安德烈亚斯·弗里奇迪萨德·朗盖尔迪尔
Owner SIEMENS AG