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Apparatus for controlling speed of fan motor of air-conditioner

A technology for air-conditioning fans and motors, which is used in control systems, space heating and ventilation, and AC motor control, and can solve problems such as inability to use

Inactive Publication Date: 2008-08-27
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This leads to a problem that conventional means of controlling the speed of the fan motor cannot be applied to air conditioners where the required speed control range is higher than 100RPM

Method used

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  • Apparatus for controlling speed of fan motor of air-conditioner
  • Apparatus for controlling speed of fan motor of air-conditioner
  • Apparatus for controlling speed of fan motor of air-conditioner

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Embodiment Construction

[0030] The following will refer to Figure 5 to Figure 8 Describes a device for controlling the speed of an air conditioner fan motor according to a preferred embodiment of the present invention, which can expand the control range of the air conditioner fan motor speed and reduce the energy of the fan motor by simultaneously changing the phase and frequency of the AC voltage according to the user's frequency command consume.

[0031] Figure 5 is a schematic diagram showing the construction of an apparatus for controlling the speed of an air conditioner fan motor according to a preferred embodiment of the present invention.

[0032] Such as Figure 5 As shown, the device for controlling the speed of the air conditioner fan motor includes: a frequency and voltage phase converter 203, which is used to simultaneously change the voltage phase and frequency of the commercial AC power supply according to the control signal, and change the voltage phase and frequency according to t...

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PUM

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Abstract

An apparatus for controlling a speed of a fan motor of an air-conditioner includes a frequency and voltage phase converter for simultaneously varying a voltage phase and frequency of a commercial AC power according to a control signal and applying a voltage varied according to the varied frequency and voltage phase to a fan motor of the air-conditioner; a zero voltage detector for receiving the commercial AC power and detecting a zero voltage of a voltage wave of the commercial AC power; and a microcomputer electrically connected with the zero voltage detector and the frequency and voltage phase converter, generating the control signal providing a predetermined frequency switching pattern according to a frequency command based on a point when the zero voltage is generated, and outputting the control signal to the frequency and voltage phase converter.

Description

technical field [0001] The present invention relates to an air conditioner, and more particularly to a device for controlling the speed of an air conditioner fan motor. Background technique [0002] Usually, a single-phase induction motor is used as the air conditioner fan motor. To generate rotational torque, the single-phase induction motor supplies a magnetic current generating a rotating field and an induced current generated by a rotor to a winding connected to an external power supply terminal. [0003] Improving the efficiency of this single phase induction motor is limited due to the primary copper losses of the stator and the secondary copper losses of the rotor. [0004] To address this limitation, a current approach such as figure 1 and figure 2 The hybrid induction motor (HIM) shown in is used as the air conditioner fan motor. [0005] figure 1 is a schematic cross-sectional view of a HIM according to conventional technology, figure 2 for along figure 1 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/00H02P27/04F24F11/46F24F11/64F24F11/74F24F11/88H02P23/07H02P25/04H02P27/02H02P27/06
CPCH02P27/18
Inventor 韩承道申铉定
Owner LG ELECTRONICS INC