Control system for multi-phase rotary machines
AssigneeControl Techniques Limited
InventorSimon David Hart
Life of this patent
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Abstract
A method and a control system for a multiphase-phase inverter system, the control system comprising an electric current detection circuit and a processor, wherein each phase of an electrical cycle is separated into a plurality of sections, inputs from the electric current detection circuit are received, each input indicating a measured phase current, and a phase current is calculated in each section, wherein the phase current calculation in at least one of the sections is determined from a changing ratio of the value of the phase current calculated from the measured values of the other phase currents in the multiphase system and the measured value of the phase.
Claims13
A method for measuring phase currents in a multiphase inverter system, the method comprising the following steps:
- separating each phase of an electrical cycle into a plurality of sections based on an electrical angle of each phase;
- and
- determining a first phase current of a first phase in at least one section of the plurality of sections from a changing ratio of a value of the first phase current calculated from measured values of other phase currents in the multiphase system and a measured value of the first phase current.
A control system for a multiphase inverter system, the control system comprising an electric current detection circuit and a processor, the processor being arranged to:
- separate each phase of an electrical cycle into a plurality of sections based on an electrical angle of each phase;
- receive inputs from the electric current detection circuit, each input indicating a measured phase current in the multiphase inverter system;
- and
- determine a first phase current of a first phase in at least one section of the plurality of sections from a changing ratio of a value of the first phase current calculated from measured values of other phase currents in the multiphase system and a measured value of the first phase current.
Dependencies are inferred from the claim text.