Battery-driven motor and motor-driven system
AssigneeJfe Steel Corporation
InventorsSouichiro Yoshizaki, Kunihiro Senda
Life of this patent
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Abstract
To provide a battery-driven motor and a motor-driven system that achieve high output density without compromising overall system efficiency, a battery-driven motor is supplied electric power from a battery via an inverter to drive a load, wherein current supplied from the battery is 3.0 C or more when driven at maximum output, the battery-driven motor including a stator core (12) provided with an electrical steel sheet as an iron core material that has a magnetic flux density of 1.65 T or more at a magnetic field strength of 5,000 A/m and an iron loss of 40.0 W/kg or less under sinusoidal excitation of 1 kHz-1.0 T.
Claims6
A battery-driven motor supplied electric power from a battery via an inverter to drive a load, wherein
- current supplied from the battery is 3.0 C or more when driven at maximum output, the battery-driven motor comprising
- a stator core provided with an electrical steel sheet as an iron core material that has a magnetic flux density of 1.65 T or more at a magnetic field strength of 5,000 A/m and an iron loss of 40.0 W/kg or less under sinusoidal excitation of 1 kHz-1.0 T, wherein
- the stator core is formed by blanking the electrical steel sheet and stacking the blanked electrical steel sheet, and has a Si gradient in a thickness direction, and
- a battery loss Wb relative to a motor loss Wm of the battery-driven motor satisfies Wm≤Wb when driven at maximum output.
A motor-driven system comprising:
- a battery;
- an inverter;
- and
- a battery-driven motor supplied electric power from a battery via an inverter to drive a load, wherein
- current supplied from the battery is 3.0 C or more when driven at maximum output, the battery-driven motor comprising
- a stator core provided with an electrical steel sheet as an iron core material that has a magnetic flux density of 1.65 T or more at a magnetic field strength of 5,000 A/m and an iron loss of 40.0 W/kg or less under sinusoidal excitation of 1 kHz-1.0 T, wherein
- the stator core is formed by blanking the electrical steel sheet and stacking the blanked electrical steel sheet, and has a Si gradient in a thickness direction, and
- a battery loss Wb relative to a motor loss Wm of the battery-driven motor satisfies Wm≤Wb when driven at maximum output.
Dependencies are inferred from the claim text.