a three-phase power supply

A technology of three-phase power supply and phase voltage, which is applied in the field of power supply, can solve problems such as high-frequency interference, and achieve the effect of overcoming high-frequency interference

Active Publication Date: 2017-08-25
HARBIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the inverter method, the digital control chip used needs a special voltage power supply, and the power tube works in a high-frequency switching state, which is prone to high-frequency interference

Method used

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Embodiment Construction

[0019] In order to further illustrate the principle and structure of the present invention, preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] Three Phase Power Embodiment

[0021] see figure 1 , a three-phase power supply, which includes: a main phase control module 1 and an auxiliary phase control module 2 . Both the primary phase control module 1 and the secondary phase control module 2 are designed based on analog circuits. The main phase control module 1 is used to output the first phase voltage and the second phase voltage, and the auxiliary phase control module 2 is connected to the main phase control module 1, which is used to output the first phase voltage and the second phase voltage output by the main phase control module 1 Perform a phase shift. The main phase control module 1 includes an input terminal (not marked), a first phase output terminal A, a second phase output terminal...

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Abstract

A three-phase power supply, which includes: a main phase control module, which is designed based on an analog circuit, and is used to output a first phase voltage and a second phase voltage, which includes an input terminal, a first phase output terminal, and a second phase output terminal And the first lead-out terminal, the input terminal is connected to the power supply, the first phase output terminal outputs the first phase voltage, and the second phase output terminal outputs the second phase voltage; and the secondary phase control module, which is based on an analog circuit design, includes a third phase The output terminal, which is connected to the first phase output terminal, the second phase output terminal and the first lead-out terminal of the main phase control module, shifts the phase of the first phase voltage and the second phase voltage output by the main phase control module, and the third phase The output terminal outputs the third phase voltage. The three-phase power supply can overcome the high-frequency interference generated when PWM control is adopted.

Description

technical field [0001] The invention relates to the field of power supplies, in particular to three-phase power supplies. Background technique [0002] Three-phase power supply is widely used in the field of motor drive. Whether it is a common AC asynchronous motor or a permanent magnet synchronous motor with precise speed, it is driven by a three-phase power supply. At present, the main methods for generating three-phase power supply are: 1) direct generation by a three-phase AC generator; 2) three-phase power generation by a DC power supply through an inverter circuit. The method of using an inverter circuit to generate a three-phase power supply generally uses a digital controller to control the on-off of the switch tube, and uses a PWM method to control the output voltage to generate a three-phase AC voltage. Using the inverter method, the digital control chip used needs a special voltage power supply, and the power tube works in a high-frequency switching state, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/00
CPCH02M1/12H02M7/5395H02M1/0016
Inventor 卜迟武孙智慧晏祖根邓兆军
Owner HARBIN UNIV OF COMMERCE
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