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Device and method for measuring clothes weight in washing machine

A laundry weight and washing machine technology, which is applied to the washing machine's control device, measuring device, washing device, etc., and can solve the problem of large differences in the weight of clothes

Inactive Publication Date: 2005-05-25
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But if a certain voltage is not applied to the motor due to the surrounding environment, the calculated laundry weight will differ greatly from the actual value

Method used

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  • Device and method for measuring clothes weight in washing machine
  • Device and method for measuring clothes weight in washing machine
  • Device and method for measuring clothes weight in washing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] Reference will now be made in detail to the preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings.

[0048] Figure 4 is a circuit diagram showing a sensorless BLDC motor drive device according to a preferred embodiment of the present invention.

[0049] like Figure 4 As shown, the driving device of the sensorless BLDC motor includes: a rectifier 41 for rectifying and smoothing alternating current; an inverter 42 for applying the rectified and smoothed voltage and current to the BLDC motor and controlling the motor rotor (not shown Display) the rotating speed; The position detector 44 is used for detecting the electric current that is applied to the motor 43, and detects the rotor position of the motor 43; The microcomputer 45 is used for receiving the position detection signal detected by the position detector 44, and controls the motor 43 memory 47 for storing the motor speed value output from microcomputer 45; and p...

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PUM

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Abstract

The present invention provides a method for detecting the weight of laundry in a washing machine using a sensorless BLDC motor, the method comprising the steps of: after the motor is started and reaches a certain speed, determining whether a first predetermined time has elapsed; and when the first When the predetermined time elapses, the motor is controlled in a torque control manner, and after the second predetermined time elapses, the laundry weight is detected according to the rotation speed of the motor. Even in an environment where voltage is applied irregularly, the weight of the laundry can be accurately measured and the laundry can be washed efficiently. In addition, since the laundry weight detection device of the washing machine using the sensorless BLDC motor does not include the Hall sensor and its peripheral circuits, the laundry weight detection device has a simple structure, so that its price can be reduced.

Description

technical field [0001] The present invention relates to a device and method for detecting the weight of laundry in a washing machine using a sensorless BLDC motor, and more particularly to the following device and method for detecting the weight of laundry in a washing machine using a sensorless BLDC motor, namely the device and The method is capable of detecting the weight of laundry in a dry state by using a difference in rotational speed of a motor depending on the weight of laundry. Background technique [0002] Recently, in order to improve the washing degree of the laundry and reduce the noise and energy consumption of the washing machine, an inverter capable of freely variable control of the motor speed has been used in the washing machine. In addition, in order to adjust the water level and The amount of detergent, a method for detecting the weight of laundry (the weight of laundry) in the washing machine is also employed. [0003] figure 1 is a circuit diagram sho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06F33/02D06F37/30D06F39/00
CPCD06F37/304D06F34/18D06F2101/20D06F2103/38D06F2103/04D06F2105/48D06F2103/44H02P6/18Y02B40/00
Inventor 梁淳培赵宽烈洪讚熙
Owner LG ELECTRONICS INC