A current supply system configured to receive a rotational driving force from a drive source and supply a current to an electrical load device being a motor that requires a current that can be variable, the current supply system comprising: a rotor (11, 21, 31) connected to the drive source, the rotor (11, 21, 31) including a permanent magnet; a stator (12, 22, 32) arranged opposite to the rotor (11, 21, 31), the stator (12, 22, 32) including a winding (121, 221, 321) and a stator core (122, 222, 322), the winding (121, 221, 321) wound around the stator core (122, 222, 322); and a supply current adjustment unit (13, 23, 33) configured to adjust a current to be supplied to the electrical load device, the current adjustment implemented by changing an inductance of the winding (121, 221, 321), and the inductance change implemented by changing a magnetic resistance of a magnetic circuit (F2, F22, F32) for the winding (121, 221, 321) in accordance with a current requirement of the current supply system, the magnetic circuit (F2, F22, F32) passing through the stator core (122, 222, 322). wherein the supply current adjustment unit (13, 23, 33) is configured to change the state of the current supply system from one of a high-resistance state and a low-resistance state to the other, wherein in the low-resistance state, the magnetic resistance of the magnetic circuit for the winding, which passes through the stator core, is lower than that in the high-resistance state, wherein at an equal rotation speed the current supply system in the high-resistance state and the current supply system in the low-resistance state outputs an equal magnitude of current, wherein, to further increase the drive source output while the electrical load device is rotating at a relatively high rotation speed, the supply current adjustment unit (13, 23, 33) is configured to change the state of the current supply system from the low-resistance state to the high-resistance state, the current supply system in the high-resistance state outputting a first current when rotating at a first rotation speed (M+) higher than the equal rotation speed, the first current being larger than a maximum current output by the current supply system in the low-resistance state rotating at the first rotation speed (M+); and wherein at a relatively low rotation speed the supply current adjustment unit (13, 23, 33) is configured to change the state of the current supply system from the high-resistance state to the low-resistance state, the current supply system in the low-resistance state outputting a second current when rotating at a second rotation speed (M-) lower than the equal rotation speed, the second current being larger than a maximum current output by the current supply system in the high-resistance state rotating at the second rotation speed (M-). a rotor (11, 21, 31) connected to the drive source, the rotor (11, 21, 31) including a permanent magnet; a stator (12, 22, 32) arranged opposite to the rotor (11, 21, 31), the stator (12, 22, 32) including a winding (121, 221, 321) and a stator core (122, 222, 322), the winding (121, 221, 321) wound around the stator core (122, 222, 322); and a supply current adjustment unit (13, 23, 33) configured to adjust a current to be supplied to the electrical load device, the current adjustment implemented by changing an inductance of the winding (121, 221, 321), and the inductance change implemented by changing a magnetic resistance of a magnetic circuit (F2, F22, F32) for the winding (121, 221, 321) in accordance with a current requirement of the current supply system, the magnetic circuit (F2, F22, F32) passing through the stator core (122, 222, 322).