Simplified hybrid-secondary uncluttered machine and method
First Claim
1. An electric induction machine, comprising:
- a stator having coils for receiving ac electrical power to provide a magnetic field;
a rotor disposed within the magnetic field of the stator and spaced from the stator to define a first air gap relative to an axis of rotation for the rotor;
at least one stationary core and secondary coil spaced from the rotor by a second air gap;
wherein the rotor is provided with a plurality of magnetic elements for coupling flux, which is induced by the magnetic field of the stator, to the secondary coil, and wherein the secondary coil is disposed around an axis of rotation for the rotor to allow induction of a slip energy current in the coil without inducing a rotational energy current.
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Accused Products
Abstract
An electric machine (40, 40′) has a stator (43) and a rotor (46) and a primary air gap (48) has secondary coils (47c, 47d) separated from the rotor (46) by a secondary air gap (49) so as to induce a slip current in the secondary coils (47c, 47d). The rotor (46, 76) has magnetic brushes (A, B, C, D) or wires (80) which couple flux in through the rotor (46) to the secondary coils (47c, 47d) without inducing a current in the rotor (46) and without coupling a stator rotational energy component to the secondary coils (47c, 47d). The machine can be operated as a motor or a generator in multi-phase or single-phase embodiments. A method of providing a slip energy controller is also disclosed.
27 Citations
20 Claims
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1. An electric induction machine, comprising:
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a stator having coils for receiving ac electrical power to provide a magnetic field;
a rotor disposed within the magnetic field of the stator and spaced from the stator to define a first air gap relative to an axis of rotation for the rotor;
at least one stationary core and secondary coil spaced from the rotor by a second air gap;
wherein the rotor is provided with a plurality of magnetic elements for coupling flux, which is induced by the magnetic field of the stator, to the secondary coil, and wherein the secondary coil is disposed around an axis of rotation for the rotor to allow induction of a slip energy current in the coil without inducing a rotational energy current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of providing slip energy control in an electrical machine, the method comprising:
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inducing a flux in a rotor across a first air gap from a stator by conducting a current in a first winding of the stator;
positioning a secondary coil across a second air gap from the rotor; and
inducing a slip current in the secondary coil by magnetically coupling the flux through the rotor without inducing a current in the rotor. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification