Title:
モータの始動及び切替方法
Document Type and Number:
Japanese Patent JP2008515368
Kind Code:
A
Abstract:
A method of starting and apparatus for starting a multiphase electrical machine is disclosed. The aim is to reduce oscillatory pulsation in torque generated by the motor and inrush current that occurs shortly after start-up. The starting method comprises the steps of first connecting at least one, but less than all, of a plurality of windings to a respective phase-shifted supply voltage at a controlled point in the supply phase. Then, after a controlled delay following the first connection, connecting the or each remaining winding of the machine a respective phase-shifted supply voltage. The invention has particular application to multiphase (most usually, 3-phase) motors. However, it can also be applied to other electrical machines, such as generators and transformers. The method can be performed at initial start-up or, in the case of application to a motor, at Y-delta switchover.
Inventors:
Annsworth, Peter, Jay.
Kinsera, james, joseph
Kinsera, james, joseph
Application Number:
JP2007532945A
Publication Date:
May 08, 2008
Filing Date:
September 12, 2005
Export Citation:
Assignee:
Annsworth, Peter, Jay.
Kinsera, james, joseph
Kinsera, james, joseph
International Classes:
H02P1/32; H02P1/24
Attorney, Agent or Firm:
Masaki Goto
Masahiro Fujii
Masaaki Iida
Masahiro Fujii
Masaaki Iida