FILTER DEVICE AND STEERING CONTROL DEVICE
The present embodiments relate to a filter device and a steering control device. The filter device filters noise by comprising a capacitor unit and a short-circuit prevention unit, wherein the capacitor unit and the short-circuit prevention unit are connected in series to each other, and when the capacitor unit is short-circuited, the short-circuit prevention unit may block a short-circuit current by changing impedance formed through the capacitor unit and the short-circuit prevention unit which are connected in series to each other.
1 . A filter device for filtering noise, including a capacitor unit and a short-circuit prevention unit,
wherein the capacitor unit and the short-circuit prevention unit are connected in series, and
wherein when the capacitor unit is short-circuited, the short-circuit prevention unit blocks a short-circuit current by changing an impedance formed through the capacitor unit and the short-circuit prevention unit connected in series.
2 . The filter device of claim 1 , wherein the capacitor unit includes a capacitor, and the short-circuit prevention unit includes a resistor connected in series to the capacitor.
3 . The filter device of claim 2 , wherein when the capacitor of the capacitor unit is short-circuited, the resistor of the short-circuit prevention unit blocks the short-circuit current as a resistance is changed to increase the impedance of the capacitor unit and the short-circuit prevention unit connected in series.
4 . The filter device of claim 3 , wherein the resistor of the short-circuit prevention unit is fused after the resistance gradually increases with respect to a first resistance.
5 . The filter device of claim 4 , wherein the first resistance is 0Ω.
6 . The filter device of claim 5 , wherein when the capacitor of the capacitor unit is not short-circuited, the noise is filtered through the capacitor of the capacitor unit and the resistor with 0Ω of the short-circuit prevention unit.
7 . The filter device of claim 1 , further comprising at least one of an inductor unit including an inductor and a resistor unit including a resistor.
8 . The filter device of claim 7 , wherein when the capacitor unit includes a first capacitor unit and a second capacitor unit, and the filter device further includes the inductor unit, the first capacitor unit, the second capacitor unit, and the inductor unit constitute a π-shaped LC filter.
9 . A steering control device, comprising:
a filter unit filtering noise of electrical energy; and
a steering motor power supply unit converting the filtered electrical energy based on a steering motor control signal to generate an assist steering force, and controlling a steering motor based on the assist steering force,
wherein the filter unit includes a capacitor unit and a short-circuit prevention unit,
wherein the capacitor unit and the short-circuit prevention unit are connected in series, and
wherein when the capacitor unit is short-circuited, the short-circuit prevention unit blocks a short-circuit current by changing an impedance formed through the capacitor unit and the short-circuit prevention unit connected in series.
10 . The steering control device of claim 9 , wherein the capacitor unit includes a capacitor, and the short-circuit prevention unit includes a resistor connected in series to the capacitor.
11 . The steering control device of claim 10 , wherein when the capacitor of the capacitor unit is short-circuited, the resistor of the short-circuit prevention unit blocks the short-circuit current as a resistance is changed to increase the impedance of the capacitor unit and the short-circuit prevention unit connected in series.
12 . The steering control device of claim 11 , wherein the resistor of the short-circuit prevention unit is fused after the resistance gradually increases with respect to a first resistance.
13 . The steering control device of claim 12 , wherein the first resistance is 0Ω.
14 . The steering control device of claim 13 , wherein when the capacitor of the capacitor unit is not short-circuited, the noise is filtered through the capacitor of the capacitor unit and the resistor with 0Ω of the short-circuit prevention unit.
15 . The steering control device of claim 9 , wherein the filter unit further includes at least one of an inductor unit including an inductor and a resistor unit including a resistor.
16 . The steering control device of claim 15 , wherein when the capacitor unit includes a first capacitor unit and a second capacitor unit, and the filter unit further includes the inductor unit, the first capacitor unit, the second capacitor unit, and the inductor unit constitute a π-shaped LC filter.