Multi-phase motor system and control method
AssigneeQuanten Technologies, Inc.
InventorHengchun Mao
Life of this patent
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Abstract
A motor control method includes providing a motor comprising a plurality of windings, a rotor and a stator magnetically coupled to the rotor, coupling a plurality of power converters to the plurality of windings, configuring the plurality of power converters to operate in a first interleaving mode, controlling the plurality of power converters to dynamically adjust the number of poles of the motor and after the step of controlling the plurality of power converters to dynamically adjust the number of poles of the motor, configuring the plurality of power converters to leave the first interleaving mode and enter into a second interleaving mode.
Claims20
A method comprising:
- providing a motor comprising a plurality of windings, a rotor and a stator magnetically coupled to the rotor;
- coupling a plurality of power converters between a power source and the plurality of windings through a dc link;
- dividing the plurality of power converters into a plurality of groups, wherein a first group of power converters are synchronized to a first synchronization signal, and a second group of power converters are synchronized to a second synchronization signal, and wherein the first synchronization signal and second synchronization signal are interleaved with an interleave angle;
- and
- configuring the plurality of power converters to operate in a first interleaving mode during a first operation mode and operate in a second interleaving mode during a second operation mode, wherein the motor is configured to operate under a first number of pole pairs under the first operation mode and under a second number of pole pairs under the second operation mode, and the interleave angle in the first interleaving mode is different from the interleave angle in the second interleaving mode.
A method comprising:
- providing a motor comprising a plurality of windings, a rotor and a stator magnetically coupled to the rotor;
- coupling a plurality of power converters to the plurality of windings, wherein the plurality of power converters is coupled to a power source through a dc link;
- configuring the plurality of power converters to operate in a first interleaving mode;
- configuring the plurality of power converters to adjust the number of poles of the motor;
- and
- after adjusting the number of poles of the motor, configuring the plurality of power converters to leave the first interleaving mode and enter into a second interleaving mode, wherein an interleave angle in the first interleaving mode and an interleave angle in the second interleaving mode are selected to reduce a ripple current flowing through the dc link.
A method comprising:
- coupling a plurality of power converters to a motor comprising a plurality of windings, each of the plurality of windings being coupled to a dedicated power converter;
- in a first operating mode, synchronizing a first group of power converters and a second group of power converters of the plurality of power converters to a first synchronization signal and a second synchronization signal, respectively, wherein a first interleave angle is placed between the first synchronization signal and the second synchronization signal;
- configuring the motor to operate in a second operating mode in response to a variation of the number of poles of the motor;
- and
- in the second operating mode, placing a second interleave angle between the first synchronization signal and the second synchronization signal, wherein the second interleave angle is different from the first interleave angle.
Dependencies are inferred from the claim text.