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Title: Methods, systems and apparatus for controlling third harmonic voltage when operating a multi-space machine in an overmodulation region

Patent ·
OSTI ID:1133627
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Methods, system and apparatus are provided for controlling third harmonic voltages when operating a multi-phase machine in an overmodulation region. The multi-phase machine can be, for example, a five-phase machine in a vector controlled motor drive system that includes a five-phase PWM controlled inverter module that drives the five-phase machine. Techniques for overmodulating a reference voltage vector are provided. For example, when the reference voltage vector is determined to be within the overmodulation region, an angle of the reference voltage vector can be modified to generate a reference voltage overmodulation control angle, and a magnitude of the reference voltage vector can be modified, based on the reference voltage overmodulation control angle, to generate a modified magnitude of the reference voltage vector. By modifying the reference voltage vector, voltage command signals that control a five-phase inverter module can be optimized to increase output voltages generated by the five-phase inverter module.

Research Organization:
GM Global Technology Operations LLC, Detroit, MI (USA)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-07NT43123
Assignee:
GM Global Technology Operations LLC (Detroit, MI)
Patent Number(s):
8,742,712
Application Number:
13/014,607
OSTI ID:
1133627
Country of Publication:
United States
Language:
English

References (13)

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A novel direct torque control (DTC) method for five-phase induction machines
  • Toliyat, H. A.
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conference January 2000
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A novel overmodulation technique for space-vector PWM inverters journal November 1998

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