CROSS REFERENCE TO RELATED APPLICATIONS

This is the U.S. national stage of application No. PCT/JP2017/040347, filed on Nov. 9, 2017, and priority under 35 U.S.C. § 119(a) and 35 U.S.C. § 365(b) is claimed from Japanese Application No. 2016-221689, filed Nov. 14, 2016; the entire contents of which are incorporated herein by reference.

FIELD OF THE INVENTION

The present disclosure relates to an alternating current (AC)—direct current (DC) power supply and a motor.

BACKGROUND

There are known power conversion systems in the related art in which an alternating current is converted to a direct current.

In a known power conversion system, a plurality of components, such as a rectifier stack and a power-factor improvement module, disposed between an alternating current input portion and a direct current output portion are connected to each other through lines. This results in an increase in the size of the entire system. In order to make the entire system compact, the plurality of components between the alternating current input portion and the direct current output portion may be mounted on a single circuit board. In this case, a switching noise generated from the line among the reactor (coil), the reverse blocking diode, and the switching element can exert an influence on the alternating current input portion, due to electromagnetic induction.

SUMMARY

Example embodiments of the present disclosure provide AC-DC power supplies and motors, each of which is reduced in size and in which an influence of switching noise on an alternating-current input line is reduced.

According to an example embodiment of the present disclosure, an alternating-current (AC)—direct-current (DC) power supply including a circuit board is provided. The circuit board includes an alternating-current input terminal to which an alternating current is input and a direct-current output terminal from which a direct current is output. The AC-DC power supply includes a diode bridge that rectifies the alternating current input via the alternating-current input terminal, an alternating-current input line that electrically connects the alternating-current input terminal and the diode bridge, a coil connected to the diode bridge, a diode connected to the direct-current output terminal, a switching line that electrically connects the coil and the diode, and a switching element connected to the switching line. A portion of the switching line is disposed at right angles to a portion of the alternating-current input line.

In another example embodiment of the present disclosure, a motor including the AC-DC power supply is provided.

The above and other elements, features, steps, characteristics and advantages of the present disclosure will become more apparent from the following detailed description of the example embodiments with reference to the attached drawings.

