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Method of measuring moment of inertia of washing machine drum and washing machine implementing the method

A technology of a washing machine drum and a measuring method, which is applied to the control device of washing machines, other washing machines, washing devices, etc., can solve problems such as inaccurate measurement, and achieve the effects of reducing calculation costs, eliminating measurement errors, and high measurement accuracy.

Active Publication Date: 2011-12-14
ASKOLL HLDG SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also exposes disadvantages related to measurement inaccuracies due to unbalanced loads

Method used

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  • Method of measuring moment of inertia of washing machine drum and washing machine implementing the method
  • Method of measuring moment of inertia of washing machine drum and washing machine implementing the method
  • Method of measuring moment of inertia of washing machine drum and washing machine implementing the method

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Experimental program
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Embodiment Construction

[0051] Reference attached figure 1 , a washing machine generally indicated at 1 comprises a drum 2 mounted in a drum housing according to a horizontal axis of rotation x and a synchronous motor 3 arranged for moving the drum 2 about the axis of rotation x.

[0052] The drum 2 is arranged to receive laundry or other items to be washed therein; in the remainder of this description, the term load will be used to refer generally to the contents of this drum.

[0053] In particular, the synchronous motor 3 is of the permanent magnet type and the outer cup rotor is connected in a known manner by a drive belt to the previously mentioned rotating drum 2 .

[0054] The synchronous motor 3 is associated with a control unit 4 comprising a motor drive circuit whose purpose is to implement the method for measuring the moment of inertia described below. The control unit 4 is connected to a Hall effect sensor 5 for measuring the angular velocity of the synchronous motor 3 .

[0055] Before...

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Abstract

A method of measuring a moment of inertia of a drum of a washing machine and a washing machine implementing the method, the method comprising the steps of: rotating the drum by a permanent magnet synchronous motor so that the drum reaches a first rotational angular velocity (100-101) ; at said first angular velocity, determining (104) a synchronization point in a periodic signal representing said torque delivered by said synchronous motor; Moment starts the acceleration transient of the drum (105); when the second angular velocity is reached, terminates the acceleration transient (107); obtains the duration of the acceleration transient (106); according to the following formula, based on the An indirect measurement of the moment of inertia of the drum is performed by the value of the torque supplied to the drum during an acceleration transient, the value of the duration of the transient, and the change in angular velocity in the transient:

Description

technical field [0001] The present invention generally relates to a method for measuring the moment of inertia of a drum of a drum washing machine. [0002] In particular, the method is applicable to washing machines, washing machines or similar machines for domestic or industrial use, which comprise a drum for placing items in order to subject them to a washing, spinning or centrifuging cycle. In this description, the term washing machine is generally used to denote machines of the above-mentioned type. Background technique [0003] It is known that washing machines comprise a drum which is rotated within the drum housing by means of an electric motor which is connected to the drum in most cases by means of a drive pulley. [0004] The user places a load of laundry into said drum which is substantially evenly distributed along the The surrounding walls are under pressure. [0005] The washing and / or spinning process can advantageously be optimized according to the laundr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06F33/02
CPCD06F39/003D06F34/16D06F34/18D06F2103/24D06F2103/26D06F2103/38D06F2105/48
Inventor 埃里奥·马里奥尼
Owner ASKOLL HLDG SRL
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