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US 12,756,293 B2Granted
Power supply device including a noise attenuation unit
AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorsShinya Wakisaka, Yoshiaki Ishihara, Kenichi Nakata
Life of this patent
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Abstract
In this power supply device, a main circuit includes a core, a first common mode coil, a second common mode coil, a first connection line, and a second connection line, and a noise attenuation unit includes an auxiliary coil having a third winding and a third coating, a capacitor connected to the first connection line, and a resonance suppression unit that includes an amplification unit and a low-pass filter connected to an output terminal of the amplification unit and that is provided between the auxiliary coil and the capacitor.
Claims8
A power supply device comprising:
- a main circuit;
- a switching unit connected to the main circuit;
- and
- a noise attenuation unit configured to attenuate noise generated in the switching unit,
- wherein the main circuit includes a core, a first common mode coil including a first winding and a first coating configured to coat the first winding and wound around the core, a second common mode coil including a second winding and a second coating configured to coat the second winding and wound around the core, a first connection line configured to connect the first winding and the switching unit, and a second connection line configured to connect the second winding and the switching unit, and
- the noise attenuation unit includes an auxiliary coil including a third winding and a third coating configured to coat the third winding and wound around the core such that the third winding is spaced apart from the first winding and the second winding by a predetermined insulation distance, a capacitor connected to at least one of the first connection line and the second connection line, and a resonance suppression unit including an amplification unit and a low-pass filter connected to the amplification unit and provided between the auxiliary coil and the capacitor,
- wherein the capacitor is connected to the first connection line, and
- the predetermined insulation distance is a distance at which a gain of a closed circuit becomes 0 or less when a phase of an input and a phase of an output at a predetermined point of the closed circuit including a parasitic capacitance generated between the first winding and the third winding, the third winding, the resonance suppression unit, the capacitor, and the first connection line are in phase.
5 more elements
A power supply device comprising:
- a main circuit;
- a switching unit connected to the main circuit;
- and
- a noise attenuation unit configured to attenuate noise generated in the switching unit,
- wherein the main circuit includes a core, a first common mode coil including a first winding and a first coating configured to coat the first winding and wound around the core, a second common mode coil including a second winding and a second coating configured to coat the second winding and wound around the core, a first connection line configured to connect the first winding and the switching unit, and a second connection line configured to connect the second winding and the switching unit, and
- the noise attenuation unit includes an auxiliary coil including a third winding and a third coating configured to coat the third winding and wound around the core such that the third winding is spaced apart from the first winding and the second winding by a predetermined insulation distance, a capacitor connected to at least one of the first connection line and the second connection line, and a resonance suppression unit including an amplification unit and a low-pass filter connected to the amplification unit and provided between the auxiliary coil and the capacitor,
- wherein the capacitor is connected to the first connection line,
- the auxiliary coil is wound around a portion of the core around which the first common mode coil and the second common mode coil are not wound, and
- the predetermined insulation distance is a distance at which a gain of a closed circuit becomes 0 or less when a phase of an input and a phase of an output at a predetermined point of the closed circuit including a parasitic capacitance generated between the first winding and the third winding, the third winding, the resonance suppression unit, the capacitor, and the first connection line are in phase.
6 more elements
Dependencies are inferred from the claim text.