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Motor controller and washing machine

A technology of control devices and rotating machines, which is applied in the direction of controlling electromechanical transmission devices, washing machine appliances, and other washing machines, and can solve problems such as long time of abnormal rotation

Active Publication Date: 2009-03-11
TOSHIBA LIFESTYLE PROD & SERVICES CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this judging mechanism has a problem that it takes a long time to detect abnormal rotation when the estimation calculation cannot be performed correctly or when the estimation calculation error is large.

Method used

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  • Motor controller and washing machine
  • Motor controller and washing machine
  • Motor controller and washing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Next, a first embodiment of a rotary machine control device to which the present invention is applied to a washing and drying machine will be described with reference to the drawings.

[0018] Figure 4 It is a vertical side view of a drum type (horizontal axis) washing and drying machine. A water tank 2 is provided inside the outer case 1 . Inside the water tank 2, a rotary tank (drum, drying chamber) 3 is provided. Both the water tank 2 and the rotary tank 3 are formed in a cylindrical shape. The water tank 2 and the rotary tank 3 have respective openings 4 and 5 on their front (left side in the drawing) end faces. The opening 4 of the water tub 2 is connected to an opening 6 for taking in and out of laundry formed on the front surface of the outer case 1 via a bellows 7 . A door 8 is provided on the opening 6 of the outer case 1 so as to be openable and closable.

[0019] Holes 9 (only part of which are shown) are formed in substantially the entire area of ​​the...

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PUM

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Abstract

A motor controller includes a power converter energizing a motor based on a commutation signal, the motor including a rotor provided with a permanent magnet and a coil-wound stator; an estimator estimating rotor rotational speed and rotational position; a controller outputting the commutation signal to the power converter, the commutation signal taking a predetermined energization pattern based on a command rotational speed during startup, and being outputted based on the rotational position estimated by the estimator during position estimation; a current detector detecting current flowing in the coil winding; an input power calculator calculating input power of the motor by voltage applied to the coil winding and the current detected by the current detector; an output power calculator calculating output power of the motor by the rotational speed estimate; and a rotational abnormality determiner determining occurrence of rotational abnormality based on comparison of the input power with the output power.

Description

technical field [0001] The present invention relates to a rotary machine control device and a washing machine having the rotary machine control device. The rotary machine control device estimates the rotational speed and the rotational position of a rotary machine having permanent magnets on the rotor, and controls the rotary machine accordingly. Background technique [0002] Compressor motors and fan motors for air conditioners, and motors for driving electric vehicles require variable speed control over a wide range, reduction in power consumption, and improvement in maintainability. In response to these requirements, more and more sensorless drive methods are used. The so-called sensorless drive method refers to the vector control of permanent magnet motors with permanent magnets on the rotor without installing sensors for rotor position detection such as Hall ICs. [0003] For example, in fan motors used in outdoor units of air conditioners, there may be abnormal rotatio...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P6/18F25B30/02D06F37/00H02P6/12D06F25/00D06F58/02H02P6/06H02P6/08H02P6/16H02P6/17H02P6/182H02P6/28H02P21/18H02P21/22H02P21/24H02P21/28H02P23/16H02P27/04H02P27/08
CPCD06F37/304Y02B40/52D06F2103/24D06F34/10D06F2103/46Y02B40/00
Inventor 前川佐理
Owner TOSHIBA LIFESTYLE PROD & SERVICES CORP