Motor with neutral bus ring connecting multiple motor coils
First Claim
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1. A motor comprising:
- a stator including a plurality of motor coils, the motor coils comprising a plurality of U-phase coils, a plurality of V-phase coils and a plurality of W-phase coils, which are arranged in a circumferential direction of the motor; and
a neutral bus ring configured to connect the motor coils, the neutral bus ring is divided into a plurality of bus ring members, and each bus ring member connects together any one of the U-phase coils, any one of the V-phase coils, and any one of the W-phase coils; and
a detecting unit configured to detect a wire breakage in one of the motor coils according to an amount of change in any one of resistance and inductance of the motor coil, the amount of change being derived from at least one of a change of current and/or a change of voltage in one of the motor coils when currents and voltages of a plurality of phases are distributed to the motor coils.
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Abstract
A stator includes multiple motor coils. The motor coils include multiple U-phase coils, multiple V-phase coils and multiple W-phase coils which are arranged in a circumferential direction of a motor. A neutral bus ring connects the motor coils together. The neutral bus ring is divided into multiple bus ring members. Each bus ring member connects together any one of the U-phase coils, any one of the V-phase coils and any one of the W-phase coils.
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Citations
12 Claims
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1. A motor comprising:
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a stator including a plurality of motor coils, the motor coils comprising a plurality of U-phase coils, a plurality of V-phase coils and a plurality of W-phase coils, which are arranged in a circumferential direction of the motor; and a neutral bus ring configured to connect the motor coils, the neutral bus ring is divided into a plurality of bus ring members, and each bus ring member connects together any one of the U-phase coils, any one of the V-phase coils, and any one of the W-phase coils; and a detecting unit configured to detect a wire breakage in one of the motor coils according to an amount of change in any one of resistance and inductance of the motor coil, the amount of change being derived from at least one of a change of current and/or a change of voltage in one of the motor coils when currents and voltages of a plurality of phases are distributed to the motor coils. - View Dependent Claims (2, 3)
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4. A motor comprising:
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a stator including a plurality of motor coils, the motor coils comprising a plurality of U-phase coils, a plurality of V-phase coils and a plurality of W-phase coils, which are arranged in a circumferential direction of the motor; and a neutral bus ring configured to connect the motor coils, the neutral bus ring is divided into a plurality of bus ring members, and each bus ring member connects together any one of the U-phase coils, any one of the V-phase coils, and any one of the W-phase coils, wherein each of the motor coils includes an insulator around which a wound wire is wound, the insulator includes an inner flange that is provided at an inner side of the wound wire in a radial direction of the motor, the inner flange includes a groove part into which a corresponding one of the bus ring members is inserted, and each of the bus ring members comprises; an inserted part that is inserted in a corresponding one of the groove parts; and wound-wire connecting terminals which extend outward from the inserted part in the radial direction of the motor and are connected to end portions of corresponding ones of the wound wires, respectively. - View Dependent Claims (5, 6, 7, 8)
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9. A method, comprising:
applying power to a motor comprising; a motor coil comprising; a first U-phase coil and a second U-phase coil; a first V-phase coil and a second V-phase coil; and a first W-phase coil and a second W-phase coil, wherein a U-phase current is supplied to an end of the first U-phase coil and to an end of the second U-phase coil, a V-phase current is supplied to an end of the first V-phase coil and to an end of the second V-phase coil, a W-phase current is supplied to an end of the first W-phase coil and to an end of the second W-phase coil, the other end of the first U-phase coil, the other end of the first V-phase coil, and the other end of the first W-phase coil are connected to a first neutral point, the other end of the second U-phase coil, the other end of the second V-phase coil, and the other end of the second W-phase coil are connected to a second neutral point, and the first neutral point and the second neutral point are electrically insulated from each other, and detecting a wire breakage in one of the motor coils. - View Dependent Claims (10)
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11. A motor comprising:
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a motor coil comprising; a first U-phase coil and a second U-phase coil; a first V-phase coil and a second V-phase coil; and a first W-phase coil and a second W-phase coil, wherein a U-phase current is supplied to an end of the first U-phase coil and to an end of the second U-phase coil, a V-phase current is supplied to an end of the first V-phase coil and to an end of the second V-phase coil, a W-phase current is supplied to an end of the first W-phase coil and to an end of the second W-phase coil, the other end of the first U-phase coil, the other end of the first V-phase coil, and the other end of the first W-phase coil are connected to a first neutral point, the other end of the second U-phase coil, the other end of the second V-phase coil, and the other end of the second W-phase coil are connected to a second neutral point, the first neutral point and the second neutral point are electrically insulated from each other, and wire breakage detection circuitry. - View Dependent Claims (12)
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Specification