US 10,320,317 B2Granted

Control device

AssigneeRenesas Electronics Corporation

InventorsReiji Yamasaki, Yutaka Ono

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Abstract

In a sensorless control of a motor, due to the characteristic of a response frequency, an induced voltage, a magnetic pole position estimation gain, a current control gain, and a speed control gain are closely related. An object of the invention is to enable the induced voltage and the frequency characteristic of a magnetic pole position estimation system to be clearly designed and to theoretically and quantitatively design all of the control gains necessary for the sensorless control so as to solve a problem that a method of designing those parameters cannot be established and the parameters have to be adjusted in a try and error manner. A control device has an estimator estimating an estimation induced voltage and a phase error of a motor by applying an induced-voltage observer and a controller controlling the motor on the basis of the estimation induced voltage and the phase error.

Claims5

Dependent claims

A control device comprising:

an estimator estimating an estimation induced voltage and a phase error of a motor by applying an induced-voltage observer, and
a controller controlling the motor on the basis of the estimation induced voltage and the phase error,
wherein the estimator comprises an induced-voltage observer, an induced-voltage computing unit, a phase computing unit, and a first subtractor,
wherein the induced-voltage observer estimates the estimation induced voltage and the phase error of the motor on the basis of a magnetic pole position estimation value of the motor fed back from the first subtractor, a target voltage, and a response current,
wherein the induced-voltage computing unit divides the estimation induced voltage by an induced-voltage coefficient,
wherein the phase computing unit performs integration by multiplying the phase error with an error angle integration gain, and
wherein the first subtractor obtains the magnetic pole position estimation value by subtracting a computation result of the phase computing unit from a computation result of the induced-voltage computing unit.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/699,791Filed 8 Sep 2017
Priority: JP 2016-17746112 Sep 2016
Published: US 2018/0076748 A115 Mar 2018
Granted: 11 Jun 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H02P 21/14
Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation: estimation or adaptation of…
G05B 13/02
Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned…:…
H02P 21/0021
Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control: using different modes of control depending on a parameter,…
H02P 21/13
Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation: observer control, e.g. using…

Family

US 2018/0076748 A1Pre-grant publication · published 15 Mar 2018
US 10,320,317 B2This patent

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

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