Method and electric combined device for powering and charging with compensation means
The invention relates to a combined device and method for powering and charging, that comprises an AC motor ( 6 ), a converter ( 2 ), storage means ( 5 ), and switching means ( 4 ) either for enabling the powering of the motor ( 6 ) or for enabling the charging of the storage means ( 5 ) by the converter. The device includes means for compensating the magnetic fields generated during the charge of the storage means ( 5 ) in order to limit or prevent the movements of the motor ( 6 ) rotor.
1. A combined power supply and charging method, comprising:
controlling switching from a motor power supply mode to an energy storage means charging mode on an electrical network and vice versa;
compensating for magnetic fields during the energy storage means charging mode in order to limit or eliminate movements of a rotor of the motor, wherein compensating for the magnetic fields comprises injecting a compensation current into one or more phases of the motor that are not linked to a phase of an electrical network,
wherein the combined power supply and charging method is for implementing a device equipped with the motor and linked to the electrical network, a number of phases of which is less than a number of phases of the motor.
2. The method as claimed in claim 1 , wherein the compensation current is slaved to the position of the rotor of the motor.
3. The method as claimed in claim 1 , wherein the compensation current is slaved to a charge current that is injected into one or more phases of the motor that are linked to a phase of the electrical network.
4. The method as claimed in claim 3 , wherein compensating for the magnetic fields comprises injecting the charge current via a mid-point of at least one inductive winding of a stator of the motor.
5. The method as claimed in claim 4 , in which, during said charge current injection operation, the same charge current is injected into each half of said inductive winding.
6. The method as claimed in claim 1 , wherein compensating for the magnetic fields comprises rectifying the electrical network by a diode bridge.
7. The method as claimed in claim 1 , for implementing the device equipped with a three-phase motor and linked to a single-phase electrical network, wherein compensating for the magnetic fields comprises:
rectifying the single-phase electrical network by a diode bridge, and
injecting, into one or more phases of the motor that are not linked to a phase of the single-phase electrical network, a current equal to a charge current injected into one or more phases of the motor that are linked to a phase of the single-phase electrical network.
8. The method as claimed in claim 1 , for implementing the device equipped with a three-phase motor and linked to a single-phase electrical network, wherein compensating for the magnetic fields comprises:
rectifying, by a diode bridge, the single-phase electrical network, and
injecting a charge current via a mid-point of at least one coil of a stator of the motor.
9. The method as claimed in claim 1 , for implementing the device equipped with a three-phase motor, and linked to a single-phase electrical network, wherein compensating for the magnetic fields comprises injecting a charge current via a mid-point of at least one coil of a stator of the motor.
10. The method as claimed in claim 1 , for implementing the device equipped with a three-phase motor and linked to a three-phase electrical network, wherein compensating for the magnetic fields comprises: rectifying, by a diode bridge, the three-phase electrical network, and reversing a phase of the motor.
11. The method as claimed in claim 1 , for implementing the device equipped with a three-phase motor and linked to a three-phase electrical network, wherein compensating for the magnetic fields comprises injecting a charge current via mid-points of the coils of a stator of the motor.
12. A combined power supply and charging method, comprising:
controlling switching from a motor power supply mode to an energy storage means charging mode on an electrical network and vice versa;
compensating for magnetic fields during the energy storage means charging mode in order to limit or eliminate movements of a rotor of the motor,
wherein the combined power supply and charging method is for implementing a device equipped with a three-phase motor and linked to a single-phase electrical network,
wherein compensating for the magnetic fields comprises injecting, into one or more phases of the motor that are not linked to a phase of the single-phase electrical network, a current equal to a charge current injected into one or more phases of the motor that are linked to a phase of the single-phase electrical network.
13. A combined power supply and charging electric device, comprising:
an alternating current motor;
an inverter;
energy storage means;
switching means for enabling one of powering of the motor or charging of the energy storage means by the inverter; and
means for compensating for magnetic fields generated during the charging of the energy storage means in order to limit or eliminate the movements of a rotor of the motor, wherein means for compensating for the magnetic fields comprises injecting a compensation current into one or more phases of the motor that are not linked to a phase of an electrical network, and
the device being equipped with the motor and linked to the electrical network, and having a number of phases less than a number of phases of the motor.