Title:
洗濯機
Document Type and Number:
Japanese Patent JP7198032
Kind Code:
B2
Abstract:
To provide a washing machine capable of preventing an overcurrent state from being brought about even when one-shunt current detection system is employed.SOLUTION: The washing machine comprises: a current detection element connected to an inverter circuit and generating a signal corresponding to a current value; a PWM signal generation part for generating a 3-phase PWM signal pattern so as to follow a rotor position of a motor; and a current detection part for detecting a phase current of the motor on the basis of a signal generated in the current detection element and the PWM signal pattern. The PWM signal generation part generates the PWM signal pattern so that the current detection part can detect one or more phase current at least once or more times in a carrier period of the PWM signal. The current detection part further comprises an output voltage restricting part which detects the current value at least once or more times per 1 millisecond, and compares the detected current value with a threshold value, and decreases an output voltage by the PWM control when it exceeds a threshold value.SELECTED DRAWING: Figure 1
Inventors:
Thin thread
Suzuki Nobuyuki
Toshimitsu Aizawa
Suzuki Nobuyuki
Toshimitsu Aizawa
Application Number:
JP2018187380A
Publication Date:
December 28, 2022
Filing Date:
October 02, 2018
Export Citation:
Assignee:
Toshiba Lifestyle Products & Services Corporation
International Classes:
H02P27/08; D06F33/30
Domestic Patent References:
| JP2017205286A | ||||
| JP2006230766A |
Attorney, Agent or Firm:
Patent Attorney Corporation Sato
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