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AssigneeKabushiki Kaisha Toshiba
InventorsYutaka Hashiba, Kazuto Sakai, Norio Takahashi, Kazuaki Yuuki, Masanori Arata, Yusuke Matsuoka, Motoyasu Mochizuki, Tadashi Tokumasu
Estimating the term…
According to one embodiment, a rotor is configured by a rotor core and magnetic poles. Two or more types of permanent magnets are used such that each product of coercivity and thickness in the magnetization direction becomes different. A stator is located outside the rotor with air gap therebetween and configured by an armature core winding. At least one permanent magnet is magnetized by a magnetic field by a current of the armature winding to change a magnetic flux content thereof irreversibly. A short circuited coil is provided to surround a magnetic path portion of the other permanent magnet excluding the magnet changed irreversibly and a portion adjacent to the other permanent magnet where the magnetic flux leaks. A short-circuit current is generated in the short circuited coil by the magnetic flux generated by conducting a magnetization current to the winding. A magnetic field is generated by the short-circuit current.
A permanent magnet electric motor in which a rotor is configured by a rotor core and a plurality of magnetic poles formed inside the rotor core by using two or more types of permanent magnets selected such that a product of coercivity and thickness in a magnetization direction of each magnet is different from each other, in which a stator is located outside the rotor with an air gap intervening between them and configured by an armature core and an armature winding, in which at least one permanent magnet forming the magnetic poles of the rotor is magnetized by a magnetic field generated by a current of the armature winding to change a magnetic flux content thereof irreversibly,
A permanent magnet electric motor in which a rotor is configured by a rotor core and a plurality of magnetic poles formed inside the rotor core by using two or more types of permanent magnets selected such that a product of coercivity and thickness in a magnetization direction of each magnet is different from each other, in which a stator is located outside the rotor with an air gap intervening between them and configured by an armature core and an armature winding, in which at least one permanent magnet forming the magnetic poles of the rotor is magnetized by a magnetic field generated by a current of the armature winding to change a magnetic flux content thereof irreversibly,
A permanent magnet electric motor in which a rotor is configured by a rotor core and a plurality of magnetic poles formed inside the rotor core by using two or more types of permanent magnets selected such that a product of coercivity and thickness in a magnetization direction of each magnet is different from each other, in which a stator is located outside the rotor with an air gap intervening between them and configured by an armature core and an armature winding, in which at least one permanent magnet forming the magnetic poles of the rotor is magnetized by a magnetic field generated by a current of the armature winding to change a magnetic flux content thereof irreversibly,
A permanent magnet electric motor in which a rotor is configured by a rotor core and a plurality of magnetic poles formed inside the rotor core by using two or more types of permanent magnets selected such that a product of coercivity and thickness in a magnetization direction of each magnet is different from each other, in which a stator is located outside the rotor with an air gap intervening between them and configured by an armature core and an armature winding, in which at least one permanent magnet forming the magnetic poles of the rotor is magnetized by a magnetic field generated by a current of the armature winding to change a magnetic flux content thereof irreversibly,
A permanent magnet electric motor in which a rotor is configured by a rotor core and a plurality of magnetic poles formed inside the rotor core by using two or more types of permanent magnets selected such that a product of coercivity and thickness in a magnetization direction of each magnet is different from each other, in which a stator is located outside the rotor with an air gap intervening between them and configured by an armature core and an armature winding, in which at least one permanent magnet forming the magnetic poles of the rotor is magnetized by a magnetic field generated by a current of the armature winding to change a magnetic flux content thereof irreversibly,
A permanent magnet electric motor in which a rotor is configured by a rotor core and a plurality of magnetic poles formed inside the rotor core by using two or more types of permanent magnets selected such that a product of coercivity and thickness in a magnetization direction of each magnet is different from each other, in which a stator is located outside the rotor with an air gap intervening between them and configured by an armature core and an armature winding, in which at least one permanent magnet forming the magnetic poles of the rotor is magnetized by a magnetic field generated by a current of the armature winding to change a magnetic flux content thereof irreversibly,
Dependencies are inferred from the claim text.