JPS54119862A - Ac line filter circuit - Google Patents

Ac line filter circuit

Info

Publication number
JPS54119862A
JPS54119862A JP2652478A JP2652478A JPS54119862A JP S54119862 A JPS54119862 A JP S54119862A JP 2652478 A JP2652478 A JP 2652478A JP 2652478 A JP2652478 A JP 2652478A JP S54119862 A JPS54119862 A JP S54119862A
Authority
JP
Japan
Prior art keywords
noise
choke coil
common
impulsive
normal mode
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2652478A
Other languages
Japanese (ja)
Inventor
Susumu Oota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2652478A priority Critical patent/JPS54119862A/en
Publication of JPS54119862A publication Critical patent/JPS54119862A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H1/00—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network
    • H03H1/0007—Constructional details of impedance networks whose electrical mode of operation is not specified or applicable to more than one type of network of radio frequency interference filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/42—Balance/unbalance networks
    • H03H7/425—Balance-balance networks
    • H03H7/427—Common-mode filters

Abstract

PURPOSE:To suppress the noise up to higher frequency, by providing the common mode choke coil at the both sides of the normal mode choke coil. CONSTITUTION:When impulsive noise is invaded from AC input, the common mode noise is attenuated with the first common choke coil L1 and capacitors C1 and C2, and the waveform of impulsive noise is softened with the time constant LC. Since the frequency component of impulsive noise is lowered at the normal mode choke coil L2 and C3, the normal mode noise can effectively be attenuated and the waveform is softened with the time constant LC in passing through the circuit. Further, the common mode noise can effectively be suppressed, which is difficult to attenuate only with the first stage by passing through the noise in the common choke coil L3. Moreover, impulsive noise is produced also from the electronic unit, since the circuit is symmetrical left and right, the noise to external can similarly be suppressed.
JP2652478A 1978-03-10 1978-03-10 Ac line filter circuit Pending JPS54119862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2652478A JPS54119862A (en) 1978-03-10 1978-03-10 Ac line filter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2652478A JPS54119862A (en) 1978-03-10 1978-03-10 Ac line filter circuit

Publications (1)

Publication Number Publication Date
JPS54119862A true JPS54119862A (en) 1979-09-18

Family

ID=12195855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2652478A Pending JPS54119862A (en) 1978-03-10 1978-03-10 Ac line filter circuit

Country Status (1)

Country Link
JP (1) JPS54119862A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6282709A (en) * 1985-10-07 1987-04-16 Murata Mfg Co Ltd Line filter
JPS63135008A (en) * 1986-11-26 1988-06-07 Matsushita Electric Works Ltd Power filter circuit for dimmer inverter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6282709A (en) * 1985-10-07 1987-04-16 Murata Mfg Co Ltd Line filter
JPS63135008A (en) * 1986-11-26 1988-06-07 Matsushita Electric Works Ltd Power filter circuit for dimmer inverter

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