US 11,444,563 B2Granted

Motor drive

AssigneeGoodrich Control Systems Limited

InventorJaspreet Kaur Mann

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Abstract

A motor drive comprises a rectifier arranged to receive an externally supplied AC voltage and to generate a DC bus voltage. An inverter is arranged to receive the DC bus voltage and to generate an AC output voltage for supply to an external load. A DC bus portion is connected between the rectifier and the inverter. The DC bus comprises first and second conductors, wherein an inductor is connected in series along the first conductor between the rectifier and the inverter. A DC link capacitor is connected in parallel between the conductors. A controller is arranged to supply a plurality of perturbation signals at a first node between the rectifier circuit portion and the DC bus portion, to measure a respective response signal at a second node between the DC bus and the inverter and is is arranged to generate a parameterised model of a transfer function of the DC.

Claims17

Dependent claims

A motor drive comprising:

a rectifier circuit portion arranged to receive an externally supplied AC voltage and to generate a DC bus voltage therefrom;
an inverter circuit portion arranged to receive the DC bus voltage and to generate an AC output voltage therefrom for supply to an external load;
a DC bus portion connected between said rectifier and inverter circuit portions, said DC bus portion comprising first and second conductors, wherein an inductor is connected in series along the first conductor between said rectifier and inverter circuit portions, and wherein a DC link capacitor is connected in parallel between the first and second conductors;
and
a controller arranged to supply a plurality of perturbation signals at a first node between the rectifier circuit portion and the DC bus portion, and to measure a respective response signal, for each perturbation signal, at a second node between the DC bus portion and the inverter circuit portion;
wherein the controller is arranged to generate a parameterised model of a transfer function of the DC bus portion from said perturbation and response signals and to extract an estimated capacitance of the DC link capacitor from said parameterised model.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/146,600Filed 12 Jan 2021
Priority: EP 2027505813 Mar 2020
Published: US 2021/0288601 A116 Sep 2021
Granted: 13 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H02M 5/458
Using devices of a triode or transistor type requiring continuous application of a control signal: using semiconductor devices only
H02P 23/0022
Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control: model reference adaptation, e.g. MRAS or MRAC, useful for…
G01R 27/2605
Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric…:…
G01R 31/64
Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections: testing…

Family

US 2021/0288601 A1Pre-grant publication · published 16 Sep 2021
US 11,444,563 B2This patent

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

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