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US 2018/0022576 A1Published application
Drive and control for six-phase electrical machines with negligible common-mode voltage
AssigneeOtis Elevator Company
InventorsDong Jiang, Shashank Krishnamurthy, Daryl J. Marvin
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Abstract
A drive and motor system and method for a six phase machine with negligible common-mode voltage is provided. The six-phase machine includes six phase windings divided into at least two windings groups configured to generate a zero common-mode pulse width modulation. The drive and motor system and method can also include at least one direct current source and a six phase inverter switching between positive and negative power of the at least one direct current source.
Claims15
A motor and drive system, comprising:
- at least one direct current source;
- a six phase inverter switching between positive and negative power of the at least one direct current source;
- a six phase machine including six phase windings divided into at least two windings groups configured to result in a zero common-mode pulse width modulation across the at least two windings groups.
A method, comprises:
- switching, by a six phase inverter of a motor and drive system, between positive and negative power of at least one direct current source;
- and
- effecting a zero common-mode pulse width modulation across at least two windings groups, by a six phase machine, in accordance with the switching by the six phase inverter, the six phase machine including six phase windings divided into the at least two windings groups.
Dependencies are inferred from the claim text.