Title:
COIL DRIVING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/040184
Kind Code:
A1
Abstract:
The present invention provides a coil driving device comprising: an input voltage sensing unit for sensing an input voltage; a switch unit configured to make a switching operation to supply a driving current to a coil; a PWM circuit unit for outputting a pulse width modulation (PWM) signal for the switching operation of the switch unit; an impedance adjustment unit for varying an impedance value such that the PWM signal is adjusted, thereby limiting the driving current; and a control unit for causing the impedance adjustment unit to vary the impedance value on the basis of the input voltage, thereby adjusting at least one of the duty ratio of the PWM signal and the frequency thereof.
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Inventors:
SEON JONGKUG (KR)
JO WOOJIN (KR)
KO JAEHYEONG (KR)
JO WOOJIN (KR)
KO JAEHYEONG (KR)
Application Number:
PCT/KR2020/005574
Publication Date:
March 04, 2021
Filing Date:
April 28, 2020
Export Citation:
Assignee:
LS ELECTRIC CO LTD (KR)
International Classes:
H01F7/06; H01F7/16; H01H1/54
Domestic Patent References:
| WO2005053143A1 | 2005-06-09 |
Foreign References:
| KR100802910B1 | 2008-02-13 | |||
| KR20020086126A | 2002-11-18 | |||
| KR200222138Y1 | 2001-05-02 | |||
| KR101206215B1 | 2012-11-28 |
Attorney, Agent or Firm:
PARK, Jang-Won (KR)
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