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Alternating current power supply phase number conversion method and device

A technology of AC power supply and conversion device, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of harmonics introduced into the system, complex rectification and inverter process, stability and overload capacity limitations, etc., to achieve overload capacity and anti-corrosion Strong impact effect

Active Publication Date: 2021-07-27
哈尔滨旋驰电气科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the transformation of the number of phases through power electronics technology requires complex rectification and inversion processes, and in order to reduce the influence of harmonics, it is also necessary to set up related filtering devices
Since the basic principle of this technology is to combine current or voltage by area equivalent cutting, it is easy to introduce harmonics to the system. At the same time, this technology is based on power electronic devices, and its stability and overload capacity are limited.

Method used

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  • Alternating current power supply phase number conversion method and device
  • Alternating current power supply phase number conversion method and device
  • Alternating current power supply phase number conversion method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] like figure 1 As shown, the present invention discloses a method for converting the phase number of an AC power supply, the method comprising:

[0051] Step S1: Install a three-phase symmetrical input winding on the stator. When the three-phase symmetrical winding is connected to a three-phase symmetrical power supply, the three-phase symmetrical input winding forms a loop with the three-phase symmetrical power supply. Three-phase symmetrical currents flow in the winding to form a first rotating magnetic field.

[0052] Step S2: Install at least one set of output windings on the stator, each set of output windings forms a loop with the load, and current flows in the output windings to form a second rotating magnetic field.

[0053] Step S3: The rotor rotates relative to the stator to form a third rotating magnetic field.

[0054] Step S4: Synthesizing the first rotating magnetic field, the second rotating magnetic field and the third rotating magnetic field to obtain ...

Embodiment 2

[0065] The present invention discloses an AC power supply phase conversion device, the device is applied to the method described in Embodiment 1, and the device includes: a three-phase symmetrical input winding and at least one set of output windings; the three-phase symmetrical input winding and Each set of output windings is arranged on the stator; each set of output windings includes n-phase windings, and each phase winding is arranged in a stator slot, where n is a positive integer greater than or equal to 2.

[0066] In this embodiment, the two sets of windings can be layered, or slotted independently of each other, such as a set of slots for the three-phase symmetrical input winding, and a set of slots for the multi-phase output winding; or three-phase symmetrical input windings and multi-phase The output windings share slots and are then arranged symmetrically.

[0067] In this embodiment, the layout of the output windings needs to be specially designed according to the...

Embodiment 3

[0076] like Image 6 As shown, the present invention also provides a method for converting the phase number of an AC power supply, the method comprising:

[0077] Step S1: Install at least one set of input windings on the stator, each set of input windings forms a loop with the load, and current flows in the input windings to form a first rotating magnetic field.

[0078] Step S2: Install a three-phase symmetrical output winding on the stator. When the three-phase symmetrical winding is connected to a three-phase symmetrical power supply, the three-phase symmetrical output winding forms a loop with the three-phase symmetrical power supply. Three-phase symmetrical currents flow in the winding to form a second rotating magnetic field.

[0079] Step S3: The rotor rotates relative to the stator to form a third rotating magnetic field.

[0080] Step S4: Synthesizing the first rotating magnetic field, the second rotating magnetic field and the third rotating magnetic field to obta...

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Abstract

The invention provides an alternating current power supply phase number conversion method and device. The method comprises the steps of enabling a current to flow through an input winding or a three-phase symmetrical current to flow through a three-phase symmetrical input winding to form a first rotating magnetic field; enabling the three-phase symmetrical current to flow through a three-phase symmetrical output winding or a current to flow through an output winding to form a second rotating magnetic field; enabling a rotor to rotate relative to a stator to form a third rotating magnetic field; synthesizing the first rotating magnetic field, the second rotating magnetic field and the third rotating magnetic field to obtain a synthesized magnetic field; and using the synthesized magnetic field to cut the three-phase symmetrical output winding and each set of input winding or the three-phase symmetrical input winding and each set of output winding to generate induced electromotive force. According to the present invention, the stator is provided with the three-phase symmetrical input winding and the output winding, so that the conversion from a three-phase power supply to a multi-phase power supply is realized; the three-phase symmetrical output winding and the input winding are arranged on the stator, so that the conversion from the multi-phase power supply to the three-phase power supply is realized; and the above conversion improves the overload capability and the impact resistance capability.

Description

technical field [0001] The invention relates to the technical field of power supply phase number conversion, in particular to a method and device for phase number conversion of an AC power supply. Background technique [0002] The power supply system of modern power system is mainly based on the three-phase system, and the power system most easily obtained by users is three-phase power supply or single-phase power supply. Therefore, the electrical equipment in the industry is mainly three-phase or single-phase electrical equipment. For example, in the field of AC electric transmission in industry and agricultural production, the most widely used driving motors are mainly three-phase motors. Household appliances mainly use single-phase power supply for residents' electricity consumption, and the power supply lines provided by power supply companies only provide single-phase power supply for residents, so the household appliances are mainly powered by single-phase power supply...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/085
CPCH02H7/0854H02H7/0855
Inventor 戈宝军陶大军
Owner 哈尔滨旋驰电气科技有限公司
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