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Motor controller and washing machine

A control device and a technology for rotating machines, which are used in the control of electromechanical transmissions, washing machines, appliances, and other washing machines, and can solve problems such as abnormal rotation for a long time.

Active Publication Date: 2011-03-09
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

[0018] 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.

[0019] 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.

[0020] 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 inthe 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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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/00H02P6/18F25B30/02D06F37/00H02P6/12D06F25/00D06F58/02H02P6/06H02P6/08H02P6/16H02P6/17H02P6/182H02P6/28H02P21/18H02P21/22H02P21/24H02P21/28H02P23/16H02P27/04H02P27/08
CPCY02B40/52D06F37/304D06F2103/24D06F34/10D06F2103/46Y02B40/00
Inventor 前川佐理
Owner TOSHIBA LIFESTYLE PROD & SERVICES CORP