DEVICE FOR OPERATING SYNCHRONOUS MOTORS AND ASSOCIATED METHOD
First Claim
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1. A device for operating a synchronous machine, comprising:
- a three-phase AC power controller connectable to a three-phase system and including at least two semiconductor controllers for the phases of the three-phase system;
a position encoder configured to determine a position angle of the rotor of the synchronous machine;
a device configured to determine the system voltage phase position for at least one of the phases of the three-phase system;
at least one device, configured to specify a pair of two of the semiconductor controllers on the basis of the position angle of the rotor,; and
at least one device, configured to specify switching instants for the semiconductor controllers of the respective pair on the basis of the system voltage phase position.
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Abstract
The synchronous motors are controlled by a three-phase AC power controller. According to an embodiment of the invention, firing points for the AC power controller are determined. A pair of two or three phases is determined from the angular position of the rotor, for which the firing points can be present for the respective A.C power controller. Actual firing points are determined from the mains voltage phase position of the phases so that only positive torque is produced.
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16 Claims
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1. A device for operating a synchronous machine, comprising:
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a three-phase AC power controller connectable to a three-phase system and including at least two semiconductor controllers for the phases of the three-phase system; a position encoder configured to determine a position angle of the rotor of the synchronous machine; a device configured to determine the system voltage phase position for at least one of the phases of the three-phase system; at least one device, configured to specify a pair of two of the semiconductor controllers on the basis of the position angle of the rotor,; and at least one device, configured to specify switching instants for the semiconductor controllers of the respective pair on the basis of the system voltage phase position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16)
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12. A method for operating a synchronous machine including a three-phase AC power controller connected to a three-phase system and including at least two semiconductor controllers, rendered conducting or fired at particular firing instants, the method comprising:
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determining a rotor position angle; determining the system voltage phase position in at least one of the phases of the three-phase system; specifying the firing instants on the basis of the position angle and the system voltage phase position such that a positive torque is produced.
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Specification