KR940010451A - Motor noise reduction device - Google Patents

Motor noise reduction device Download PDF

Info

Publication number
KR940010451A
KR940010451A KR1019920018740A KR920018740A KR940010451A KR 940010451 A KR940010451 A KR 940010451A KR 1019920018740 A KR1019920018740 A KR 1019920018740A KR 920018740 A KR920018740 A KR 920018740A KR 940010451 A KR940010451 A KR 940010451A
Authority
KR
South Korea
Prior art keywords
noise
generated
motor
output signal
output
Prior art date
Application number
KR1019920018740A
Other languages
Korean (ko)
Inventor
차경환
Original Assignee
이헌조
주식회사 금성사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019920018740A priority Critical patent/KR940010451A/en
Publication of KR940010451A publication Critical patent/KR940010451A/en

Links

Landscapes

  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

본 발명은 모타의 구동시 발생되는 소음을 감소시키는 것으로서 종래에는 모타의 구동시 발생되는 소음을 입력 및 분석하고, 발생되는 소음의 역위상을 가지는 신호르 스피커로 출력하였으나, 발생된 소음을 입력 및 분석한후 역위상을 가지는 신호를 출력할때까지 소요되는 시간이 지연으로 인하여 소음을 감소시키는 데에는 그 한계가 있었고, 가장 높은레벨로 발생되는 전원 주파수의 소음인 120Hz소음성분은 여전히 높은 레벨로 발생하였다.The present invention is to reduce the noise generated when the motor is driven in the conventional input and analysis of the noise generated when the motor is driven, and output to the signal speaker having a reverse phase of the generated noise, but the generated noise input and After the analysis, the time required to output the signal with the inverse phase was limited to reduce the noise due to the delay, and the 120Hz noise component, the noise of the power frequency generated at the highest level, was still generated at the high level. .

본 발명은 120Hz의 정현파 신호를 미리 일정시간 간격으로 샘플링하여 메모리에 저장하여 두고, 전원주파수의 위상을 판별하여, 저장된 120Hz의 정현파 신호를 전원주파수에 동기되고 역위상을 가지도록 출력함으로써 모타에서 가장 높은레베롤 발생되는 120Hz의 소음성분을 효과적으로 감소시킬 수 있다.According to the present invention, a sinusoidal signal of 120 Hz is sampled at predetermined intervals in advance and stored in a memory, the phase of the power frequency is determined, and the stored 120 Hz sinusoidal signal is synchronized with the power frequency and outputted to have an inverse phase. It is possible to effectively reduce the noise component of 120Hz generated by high lever.

Description

모타의 소음 감소장치Motor noise reduction device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명의 소음 감소장치를 보인 회로도,2 is a circuit diagram showing a noise reduction device of the present invention,

제4도는 본 발명의 소음 감소장치에서 스피커의 설치상태를 보인 개략도,Figure 4 is a schematic diagram showing the installation state of the speaker in the noise reduction device of the present invention,

제6도의 (가)(나)는 본 발명의 소음 감소장치에 의한 마이콤의 동작을 보인 신호흐름도.6 (a) (b) is a signal flow diagram showing the operation of the microcomputer by the noise reduction device of the present invention.

Claims (2)

입력전원(AC)을 강압하는 강압 트랜스(1)와, 상기 강압 트랜스(1)의 출력전원을 접지레벨과 비교하여 구형파로 변환하는 비교기(2)와, 상기 비교기(2)의 출력신호를 미분하는 미분기(3)와, 120Hz의 정현파를 소정의 시간간격으로 샘플링한 데이타를 메모리(4A)에 저장하여 두고 미분기(3)의 출력신호로 입력전원(AC)의 위상은 판별하여 메모리(4A)에 저장된 데이타를 입력전원(AC)의 역위상으로 출력하는 마이콤(4)과, 상기 마이콤(4)의 출력신호를 아날로그 신호로 변환하는 디지탈/아날로그 변환기(5)의 출려신호를 증폭하여 스피커(7)로 출력하는 증폭기(6)로 구성함을 특징으로 하는 모타의 소음 감소장치.A step-down transformer 1 for stepping down the input power source AC, a comparator 2 for converting the output power of the step-down transformer 1 into a square wave in comparison with the ground level, and the output signal of the comparator 2 are differentiated. The differentiator 3 and the data sampled at 120 Hz sine wave at predetermined time intervals are stored in the memory 4A, and the phase of the input power source AC is determined by the output signal of the differentiator 3, and the memory 4A is determined. Amplifies the output signal of the microcomputer 4 for outputting the data stored in the inverse phase of the input power source AC and the digital / analog converter 5 for converting the output signal of the microcomputer 4 into an analog signal. 7) Motor noise reduction device, characterized in that consisting of an amplifier (6) output to. 제1항에 있어서, 스피커(7)는, 모타(10)를 향하도록 출력신호가 모타(10)의 주변에 방사되게 구성함을 특징으로 하는 모타의 소음 감소장치.The noise reduction device of the motor according to claim 1, wherein the speaker (7) is configured such that an output signal is radiated around the motor (10) so as to face the motor (10). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920018740A 1992-10-12 1992-10-12 Motor noise reduction device KR940010451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920018740A KR940010451A (en) 1992-10-12 1992-10-12 Motor noise reduction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920018740A KR940010451A (en) 1992-10-12 1992-10-12 Motor noise reduction device

Publications (1)

Publication Number Publication Date
KR940010451A true KR940010451A (en) 1994-05-26

Family

ID=67210329

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920018740A KR940010451A (en) 1992-10-12 1992-10-12 Motor noise reduction device

Country Status (1)

Country Link
KR (1) KR940010451A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210103178A (en) * 2020-02-13 2021-08-23 주식회사 포스코 Coil bending apparatus
CN118310627A (en) * 2024-06-07 2024-07-09 国网浙江省电力有限公司金华供电公司 Urban transformer substation noise systematic control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210103178A (en) * 2020-02-13 2021-08-23 주식회사 포스코 Coil bending apparatus
CN118310627A (en) * 2024-06-07 2024-07-09 国网浙江省电力有限公司金华供电公司 Urban transformer substation noise systematic control method

Similar Documents

Publication Publication Date Title
KR890005956A (en) Power Inverter with Harmonic Filter
KR880014730A (en) Induction Motor Control
KR910021003A (en) Slip detection device and control device of compressor using same
KR940010480A (en) Speed regulating device of single phase induction motor
KR970050862A (en) Sonic pitch converter
KR920009035A (en) Power converter
KR940010451A (en) Motor noise reduction device
US20070019935A1 (en) Motor control device
KR920015683A (en) Resolver excitation signal generator
DE59602098D1 (en) CIRCUIT ARRANGEMENT
KR840004630A (en) Digital generation method and apparatus of three-phase pulse width modulation waveform for variable speed control of induction motor
KR920019055A (en) Power converter
KR970072629A (en) Variable speed control method and device of AC motor
KR890015595A (en) Automatic Gain Control
KR940010538A (en) Sine wave generator using up / down counter
TW361012B (en) Waveform forming circuit
US6765180B2 (en) Cycle skipping power control method and apparatus
JP3407550B2 (en) Start-up circuit of PWM converter device
KR970055364A (en) Digitally Controlled Multi-Frequency Generator
KR940012993A (en) Sine Wave Conversion Circuit of Ring Generator
KR930020250A (en) Clock inverter
KR890000760B1 (en) Converting device of dc - ac
KR960019986A (en) Power Supply Noise Reduction Circuit of Analog / Digital Converter
SU941968A1 (en) Two-cycle converter pulse stabilization method
KR920022632A (en) Inverter Power Supply

Legal Events

Date Code Title Description
WITN Withdrawal due to no request for examination