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A rotating electromechanical machine has a rotor having at least one current-carrying winding and at least one rotor-mounted sensor configured to sense a machine property or parameter during machine operation. Rotor-mounted circuitry dynamically modifies at least one property of the current-carrying

A rotating electromechanical machine has a rotor having at least one current-carrying winding and at least one rotor-mounted sensor configured to sense a machine property or parameter during machine operation. Rotor-mounted circuitry dynamically modifies at least one property of the current-carrying winding during machine operation in response to the sensed machine property or parameter.

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1. An electrical rotating machine, comprising: a rotor having at least one current-carrying circuit;at least one rotor-mounted sensor configured to sense an electrical machine property during machine operation; androtor-mounted electrical circuitry responsive to the rotor-mounted sensor, wherein the

1. An electrical rotating machine, comprising: a rotor having at least one current-carrying circuit;at least one rotor-mounted sensor configured to sense an electrical machine property during machine operation; androtor-mounted electrical circuitry responsive to the rotor-mounted sensor, wherein the electrical circuitry is configured to dynamically modify a property of the current-carrying circuit during machine operation in response to the sensed electrical machine property, the property modification being a modification of a property value, to an approximate target value, in a range that may be any value from a minimum property value to a maximum property value and the effective value of the property of the current-carrying circuit is determined by a switching pulse rate, pulse width, and/or amplitude of a switched variable. 2. The electrical machine of claim 1, wherein the at least one rotor-mounted sensor is configured to sense at least one of a circuit voltage, a circuit current, a magnetic field, a magnetic permeability, a temperature, a speed, a rotation rate, a rotation angle and/or an angular acceleration. 3. The electrical machine of claim 1, wherein the rotor-mounted circuitry configured to modify a property of the current-carrying circuit comprises one or more electronic switching devices. 4. The electrical machine of claim 3, wherein the electronic switching device comprise one or more of a triac, a silicon-controlled rectifier, solid state relay, and/or a thyristor. 5. The electrical machine of claim 1, wherein the rotor-mounted circuitry configured to modify a property of the current-carrying circuit comprises a linear electronic device and/or circuit. 6. The electrical machine of claim 5, wherein the linear electronic device and/or circuit comprises at least one of a MOSFET, an IGBT, and/or a bipolar transistor. 7. The electrical machine of claim 1, wherein the rotor-mounted circuitry configured to modify a property of the current-carrying circuit comprises one or more active or passive electronic devices placed in series and/or parallel with all or part of the current-carrying circuit. 8. The electrical machine of claim 1, wherein the rotor-mounted circuitry configured to modify a property of the current-carrying circuit comprises a voltage source, and/or a current source, a source of electrical reactance, and/or energy storage/supply device. 9. The electrical machine of claim 8, wherein the energy storage/supply device comprises one or more of an inductor, a capacitor, a primary and/or secondary battery. 10. The electrical machine of claim 9, wherein the energy storage/supply device comprises a device that is rechargeable during machine operation. 11. The electrical machine of claim 1, wherein the rotor-mounted circuitry is configured to modify one or more of real and/or reactive impedance, capacitance, reluctance , magnetic saturation, inductance and/or mutual inductance of the current-carrying circuit. 12. The electrical machine of claim 1, wherein the rotor-mounted circuitry is configured to vary the property of the current-carrying circuit as a function of rotor angle or position, rotation rate, and/or angular acceleration. 13. The electrical machine of claim 1, wherein the rotor-mounted circuitry is configured to vary the property of the current-carrying circuit as a continuous function. 14. The electrical machine of claim 1, wherein the rotor-mounted circuitry is configured to vary the property of the current-carrying circuit between a set of discrete property values. 15. The electrical machine of claim 1, wherein the rotor-mounted circuitry is configured to vary the property of the current-carrying circuit in response to a time history of sensor values. 16. The electrical machine of claim 1, wherein the rotor-mounted circuitry configured to vary the property of the current-carrying circuit comprises a switch-mode regulator. 17. The electrical machine of claim 16, wherein the switch-mode regulator switches the property of the current-carrying circuit at a rate higher than a nominal frequency. 18. The electrical machine of claim 17, wherein the nominal frequency of the electrical machine is the rotor's angular frequency or a pole frequency of the electrical machine. 19. The electrical machine of claim 17, wherein the nominal frequency is about 10 KHz. 20. The electrical machine of claim 17, wherein the nominal frequency is about 100 KHz. 21. The electrical machine of claim 17, wherein the nominal frequency is about 1 MHz. 22. The electrical machine of claim 1, further comprising, a controller configured to supervise operation of the at least one rotor-mounted sensor and the rotor-mounted circuitry. 23. The electrical machine of claim 22, wherein the controller is configured or programmed to regulate a machine operating parameter. 24. The electrical machine of claim 22, wherein the machine operating parameter is one of a starting current, a running current, a rotor speed and/or acceleration, a temperature at a rotor location, a power consumption, and/or a torque. 25. The electrical machine of claim 22, wherein the controller comprises one or more rotor-mounted controller components and/or off-rotor controller components. 26. The electrical machine of claim 25, wherein off-rotor components are configured to communicate with the rotor-mounted circuitry, the at least one rotor-mounted sensor and/or the one or more rotor-mounted controller components via optical, RF, acoustic, ultrasound, inductive, capacitive, and/or conducting means. 27. The electrical machine of claim 22, wherein the controller is configured to receive data inputs, settings, and commands from off-rotor sensors and/or external sources. 28. A method comprising: during operation of an electrical rotating machine having a rotor with at least one current-carrying circuit,sensing a machine property using at least one rotor-mounted sensor; anddynamically modifying a property of the current-carrying circuit in response to the sensed machine property, the property modification being a modification of a property value, to an approximate target value, in a range that may be any value from a minimum property value to a maximum property value and the effective value of the property of the current-carrying circuit is determined by a switching pulse rate, pulse width, and/or amplitude of a switched variable. 29. The method of claim 28, wherein sensing a machine property using at least one rotor-mounted sensor comprises sensing at least one of a circuit current, a circuit voltage, a magnetic field, a magnetic permeability, a temperature, a rotation rate, a rotation angle, and/or an angular acceleration. 30. The method of claim 28, wherein dynamically modifying a property of the current-carrying circuit comprises deploying rotor-mounted circuitry to modify a property of the current-carrying circuit. 31. The method of claim 28, wherein the rotor-mounted circuitry comprises one or more active electronic devices. 32. The method of claim 28, wherein the rotor-mounted circuitry comprises one or more electronic switching devices. 33. The method of claim 28, wherein the rotor-mounted circuitry comprises one or more of a triac, a silicon-controlled rectifier, solid state relay, and/or a thyristor. 34. The method of claim 28, wherein the rotor-mounted circuitry comprises one or more linear electronic devices and/or circuits. 35. The method of claim 28, wherein the rotor-mounted circuitry comprises one or more active or passive electronic devices placed in series and/or parallel with all or part of the current-carrying circuit. 36. The method of claim 28, wherein the rotor-mounted circuitry comprises a voltage source, a current source, a source of electrical reactance, and/or an energy storage/supply device. 37. The method of claim 36, wherein the energy storage/supply device comprises one or more of an inductor, a capacitor, a primary battery, a secondary battery, an inductively sourced circuit and/or an electromechanically sourced circuit. 38. The method of claim 36, wherein the energy storage/supply device comprises a device that is rechargeable during machine operation. 39. The method of claim 28, wherein the rotor-mounted circuitry is configured to modify a current or an impedance of the current-carrying circuit. 40. The method of claim 28, wherein the rotor-mounted circuitry is configured to vary the property of the current-carrying circuit in time as a function of rotor angle or position, rotation rate, and/or angular acceleration. 41. The method of claim 28, wherein the rotor-mounted circuitry is configured to vary the property of the current-carrying circuit as a continuous function. 42. The method of claim 28, wherein the rotor-mounted circuitry is configured to vary the property of the current-carrying circuit between a set of discrete property values. 43. The method of claim 28, wherein the rotor-mounted circuitry is configured to vary the property of the current-carrying circuit in response to a time history of sensor values. 44. The method of claim 28, wherein the rotor-mounted circuitry configured to vary the property of the current-carrying circuit comprises a switch-mode regulator. 45. The method of claim 28, wherein the switch-mode regulator switches the property of the current-carrying circuit at a rate higher than a nominal frequency. 46. The method of claim 45, wherein the nominal frequency of the electrical machine is the rotor's angular frequency or a pole frequency of the electrical machine. 47. The method of claim 45, wherein the nominal frequency is about 10 KHz. 48. The method of claim 45, wherein the nominal frequency is about 100 KHz. 49. The method of claim 45, wherein the nominal frequency is about 1MHz. 50. The method of claim 28, further comprising, a controller configured to supervise operation of the at least one rotor-mounted sensor and the rotor-mounted circuitry. 51. The method of claim 28, wherein the controller is configured or programmed to regulate a machine operating parameter. 52. The method of claim 28, wherein the machine operating parameter is one of a starting current, a running current, a rotor speed and/or acceleration, a temperature at a rotor location, a power consumption, and/or a torque. 53. The method of claim 28, wherein the controller comprises one or more rotor-mounted controller components and/or off-rotor controller components. 54. The method of claim 28, wherein off-rotor components are configured to communicate with the rotor-mounted circuitry, the at least one rotor-mounted sensor and/or the one or more rotor-mounted controller components via optical, RF, acoustic, ultrasound, inductive, capacitive, and/or conducting means. 55. The method of claim 28, wherein the controller is configured to receive data inputs, settings, and commands from off-rotor sensors and/or external sources.