US 10,483,899 B2Granted

Modulation scheme for multiphase machines

AssigneeKSR IP Holdings, LLC

InventorEric Hustedt

Life of this patent

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Abstract

An electrical power system for a six-phase electric motor having a first set of three-phase windings and a second set of three-phase windings. A first pulse width modulator operates at a conversion frequency and at a first phase which converts a DC power source to an alternating current to power the motor. The first pulse width modulator is electrically connected to the first set of three-phase windings. Similarly, a second pulse width modulator also operates at the same conversion frequency and at a second phase which converts the DC power to alternating current to power the second set of three-phase windings. The first and second phases of the first and second pulse width modulators are offset between 80-100 degrees.

Claims3

Dependent claims

An electrical power system for a six-phase electric motor comprising:

a first set of three-phase windings,
a second set of three-phase windings,
a first pulse width modulator operating at a conversion frequency and a first phase which converts a DC power source to an alternating current, said first pulse width modulator being electrically connected to said first set of three-phase windings,
a second pulse width modulator operating at said conversion frequency and a second phase which converts said DC power source to an alternating current, said second pulse width modulator being electrically connected to said second set of three-phase windings,
wherein said first and second phases are offset from each other by between 80 and 100 degrees to thereby reduce ripple current in said windings.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/180,242Filed 13 Jun 2016 · us provisional application
Priority: 11 Jun 2015
Published: US 2016/0365821 A115 Dec 2016
Granted: 19 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H02P 27/085
With pulse width modulation: wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency
H02P 25/22
Characterised by the circuit arrangement or by the kind of wiring: multiple windings; Windings for more than three phases
H02P
Control or regulation of electric motors, electric generators or dynamo-electric converters

Family

Application62/174,205Us provisional application · filed 11 Jun 2015
US 2016/0365821 A1Pre-grant publication · published 15 Dec 2016
US 10,483,899 B2This patent

From the US filing history. Foreign family members aren’t listed.

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