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A 2-Phase brushless AC motor with electronic control

A technology of AC motor and AC power supply, which is applied in the direction of AC motor control, electronic commutation motor control, motor control, etc. It can solve the problems of expensive DC power conversion components and the inability to place electronic circuits in the motor box, etc.

Inactive Publication Date: 2018-08-03
黄建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These DC power conversion components required are expensive and bulky
None of these designs can fit the entire electronics inside the motor box, except for those low power ones

Method used

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  • A 2-Phase brushless AC motor with electronic control
  • A 2-Phase brushless AC motor with electronic control
  • A 2-Phase brushless AC motor with electronic control

Examples

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Embodiment Construction

[0042] In the following, the present invention will be described in more detail by way of examples with reference to the drawings in the embodiments of the present invention. It should be understood that the accompanying drawings are for better understanding of the present invention, not for limiting the present invention. Dimensions and characteristics of components shown in the figures are chosen for convenience and clarity of presentation and are not shown to scale.

[0043] In the drawings, like numbers refer to like parts, if present. In this specification and claims, "a", "an" and "the" include plural unless the context clearly indicates otherwise. Also, as used in this specification and claims, "in" includes "in" and "on" unless the context clearly dictates otherwise. Also, headings or subheadings may be used in this specification for the convenience of the reader without any impact on the scope of the disclosure.

[0044] As used herein, "about", "approximately", "a...

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PUM

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Abstract

A control system for a 2-phase brushless AC motor disclosed by the invention comprises a position sensor for detecting a position of a rotor of the motor; a polarity detector for detecting a polarityof an AC supply for the motor; a first and second switching circuits respectively coupled to a first and second phase coils of the motor; a current sensor for detecting conduction of the first and second phase coils; and a controller for controlling conduction of the first and second switching circuits according to signals provided by the position sensor, the polarity detector and the current sensor; wherein the control system is embedded in the motor; and the controller is configured to turn on the first switching circuit at appropriate time interval in an AC cycle and turn on the second switching circuit to compensate for another time interval according to the position of the rotor.

Description

technical field [0001] The invention relates to a brushless AC motor, in particular to an electronically controlled two-phase brushless AC motor. Background technique [0002] Existing AC motors on the market are either brushed or brushless. Brushed motors are inefficient and have a short lifespan. Brushless motors are often used in applications requiring long life and high reliability. Split-phase capacitor (PSC) motors are brushless motors that are often used because they are simple and inexpensive to use. But PSC motors cannot directly control the rotational speed, and their efficiency is usually less than 40%. In this class of motors, the most advanced brushless motor is the electronically controlled brushless motor, which is known for its variable speed control and efficiency as high as 80%. These are all powered by high voltage DC and are called brushless DC (BLDC) motors, inverter motors or electronically controlled asynchronous motors. These electronically commu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P6/16H02P6/182H02P25/18
CPCH02P6/08H02P6/16H02P6/182H02P25/18H02P2203/03H02P27/18H02P6/15H02P25/03H02K29/08H02K29/12
Inventor 黄建
Owner 黄建
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