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Low-voltage frequency converter

A frequency converter and low-voltage technology, which is applied in the field of frequency converters, can solve problems such as low-voltage frequency converters being in blank areas, and achieve the effects of avoiding damage to the motor, running smoothly, and saving time

Inactive Publication Date: 2018-12-11
刘庆东
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current low-voltage inverter is still in a blank area in terms of user-defined control technology

Method used

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  • Low-voltage frequency converter
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Embodiment Construction

[0018] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0019] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0020] The specific implementation manners of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0021] Such as figure 1 and figure 2 As shown, according to an embodiment of the present invention, this embodiment discloses a low-voltage frequency converter; specifically, the low-voltage frequency converter includes a rectification and filtering module, a drive module, a low-voltage sw...

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Abstract

The invention discloses a low-voltage frequency converter, which comprises a rectifier and filter module, a driving module, a low-voltage switching power supply circuit and a main control module. Therectifier and filter module is connected with the driving module; the driving module is connected with the main control module; and the low-voltage switching power supply circuit is connected with themain control module and the rectifier and filter module. The low-voltage frequency converter also comprises an overcurrent and overload detection circuit, a voltage signal acquisition module, a voltage signal processing module and a voltage signal synthesis module, wherein the overcurrent and overload detection circuit is connected with a motor; the voltage signal acquisition module is connectedwith the voltage signal processing module; the voltage signal processing module is connected with the voltage signal synthesis module; and the voltage signal acquisition module is connected with the motor. The low-voltage frequency converter has a good automatic detection and control function, and meanwhile, the low-voltage frequency converter can realize user-defined program control.

Description

technical field [0001] The invention relates to the technical field of frequency converters, in particular to a low-voltage frequency converter. Background technique [0002] With the continuous maturity of low-voltage frequency converter technology, the application of low-voltage frequency conversion determines its different classifications. From a technical point of view, the control method of the low-voltage inverter also shows its technical genre to a certain extent. Here we analyze the following control methods: [0003] Sinusoidal pulse width modulation (SPWM) is characterized by simple control circuit structure, low cost, and good mechanical properties and hardness, which can meet the smooth speed regulation requirements of general transmission, and has been widely used in various fields of industry. However, when this control method is at low frequency, due to the low output voltage, the torque is significantly affected by the voltage drop of the stator resistance,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/04H02P29/024
CPCH02P27/04H02P29/027
Inventor 刘庆东
Owner 刘庆东
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