A current supply system configured to receive a rotational driving force from a drive source (EG) 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 connected to the drive source (EG), the rotor including a permanent magnet; a stator arranged opposite to the rotor , the stator including a winding and a stator core , the winding wound around the stator core ; and a supply current adjustment unit configured to adjust a current to be supplied to the electrical load device , the current adjustment implemented by changing an inductance of the winding , and the inductance change implemented by changing a magnetic resistance of a magnetic circuit (F2, F22, F32) for the winding in accordance with a current requirement of the current supply system , the magnetic circuit (F2, F22, F32) passing through the stator core . wherein the supply current adjustment unit is configured to change the state of the current supply system from one of a high-resistance state (H2) and a low-resistance state (H1) to the other, wherein in the low-resistance state (H1), 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 (H2), wherein at an equal rotation speed (M) the current supply system in the high-resistance state (H2) and the current supply system in the low-resistance state (H1) outputs an equal magnitude of current, wherein, to further increase the drive source (EG) output while the electrical load device is rotating at a relatively high rotation speed, the supply current adjustment unit is configured to change the state of the current supply system from the low-resistance state (H1) to the high-resistance state (H2), the current supply system in the high-resistance state (H2) outputting a first current when rotating at a first rotation speed (M+) higher than the equal rotation speed (M), the first current being larger than a maximum current output by the current supply system in the low-resistance state (H1) rotating at the first rotation speed (M+); and wherein at a relatively low rotation speed the supply current adjustment unit is configured to change the state of the current supply system from the high-resistance state (H2) to the low-resistance state (H1), the current supply system in the low-resistance state (H1) outputting a second current (I1) when rotating at a second rotation speed (M-) lower than the equal rotation speed (M), the second current being larger than a maximum current output by the current supply system in the high-resistance state (H2) rotating at the second rotation speed (M-). a rotor connected to the drive source (EG), the rotor including a permanent magnet; a stator arranged opposite to the rotor , the stator including a winding and a stator core , the winding wound around the stator core ; and a supply current adjustment unit configured to adjust a current to be supplied to the electrical load device , the current adjustment implemented by changing an inductance of the winding , and the inductance change implemented by changing a magnetic resistance of a magnetic circuit (F2, F22, F32) for the winding in accordance with a current requirement of the current supply system , the magnetic circuit (F2, F22, F32) passing through the stator core . <EOS>