Multigroup, multiphase driving system and driving method for rotary electric machine
First Claim
1. A multigroup, multiphase driving system comprising:
- a power converter that converts direct current power into alternating current power and vice versa;
a direct current power supply connected to a direct current side of the power converter so as to be charged with and discharge direct current power;
a rotary electric machine that is connected to an alternating current side of the power converter and includes a plurality of groups of multiphase armature windings; and
a determination unit that determines a number of groups to be used to drive the rotary electric machine on the basis of a rotation speed of the rotary electric machine, a current flowing through the rotary electric machine, a direct current power supply voltage of the direct current power supply, and a carrier frequency of the power converter.
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Accused Products
Abstract
A multigroup, multiphase driving system includes a power converter that converts direct current power into alternating current power and vice versa, a direct current power supply connected to a direct current side of the power converter to be charged with and discharge direct current power, and a rotary electric machine connected to an alternating current side of the power converter and including a plurality of groups of multiphase armature windings, and further including a determination unit that determines the number of groups to be used to drive the rotary electric machine on the basis of a rotation speed of the rotary electric machine, a current flowing through the rotary electric machine, a direct current power supply voltage of the direct current power supply, and a carrier frequency of the power converter, the multigroup, multiphase driving system overall loss in the system can be reduced.
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Citations
17 Claims
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1. A multigroup, multiphase driving system comprising:
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a power converter that converts direct current power into alternating current power and vice versa; a direct current power supply connected to a direct current side of the power converter so as to be charged with and discharge direct current power; a rotary electric machine that is connected to an alternating current side of the power converter and includes a plurality of groups of multiphase armature windings; and a determination unit that determines a number of groups to be used to drive the rotary electric machine on the basis of a rotation speed of the rotary electric machine, a current flowing through the rotary electric machine, a direct current power supply voltage of the direct current power supply, and a carrier frequency of the power converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A driving method for a rotary electric machine, executed in a multigroup, multiphase driving system including:
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a power converter that converts direct current e into alternating current power and vice versa; a direct current power supply connected to a direct current side of the power converter so as to be charged with and discharge direct current power; and a rotary electric machine that is connected to an alternating current side of the power converter and includes a plurality of groups of multiphase armature windings, the driving method comprising a determination step for determining a number of groups to be used to drive the rotary electric machine on the basis of a rotation speed of the rotary electric machine, a current flowing through the rotary electric machine, a direct current power supply voltage of the direct current power supply, and a carrier frequency of the power converter.
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Specification