Drum washing machine

A drum-type washing machine and drum technology, which can be applied to other washing machines, washing machines with containers, washing devices, etc., can solve problems such as failures, temperature rise of electronic components, etc.

Inactive Publication Date: 2007-03-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the above-mentioned existing structure, when the drum is raised from a low speed to a high speed in the dehydration program, the first motor is switched to the second motor, but there are...

Method used

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Embodiment Construction

[0011] The present invention provides a drum-type washing machine, comprising: a drum that receives laundry and is driven to rotate with the horizontal or inclined direction as the rotation axis, a motor that drives the drum with more than two poles, and a device that controls the motor. Speed ​​control unit. The control unit is configured to apply from the smallest conduction angle at which the motor can be driven when changing the number of poles of the motor to change the rotational speed. According to this configuration, by reducing the overcurrent generated when the drum is raised from a low speed to a high speed during the dehydration process, temperature rise of electronic components such as the motor and the power switch unit for driving the motor can be suppressed. In addition, since the current is reduced, low-cost products can also be used for motors and electronic components.

[0012] Hereinafter, embodiments of the present invention will be described with referen...

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Abstract

The invention provides a drum type washing machine suppressing electric current flowing through a motor when the number of poles of the motor is switched in spin-drying. When the number of poles of the motor is switched to change its rotational frequency, application of the electric current is started from a minimum conduction angle for driving the motor to suppress the electric current flowing through the motor as well as a rise in temperature of the motor, a power switching means, or the like.

Description

technical field [0001] The invention provides a drum type washing machine, which performs washing, rinsing, and dehydration procedures by rotating and driving a drum that receives laundry. Background technique [0002] Currently, such a washing machine is configured such that a drum that receives laundry and is rotatable about a horizontal rotation axis is driven by two types of motors having different numbers of poles, and the rotational speed is controlled by switching between the two types of motors. The first motor is a high-torque motor with a large number of motor poles (for example: 16 poles), which rotates at a low speed (for example, 120r / min) in washing programs and rinsing programs, and can rotate laundry with a heavy weight in water. The second motor The number of poles of the motor is small (for example, 2 poles), and it can rotate at a high speed (for example: 800r / min) during the dehydration process. These two motors are switched to perform from washing to ri...

Claims

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Application Information

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IPC IPC(8): D06F23/00D06F37/04
Inventor 庄司彰高桥武人小仓嘉尚
Owner PANASONIC CORP
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