US 2020/0028460 A1 · APPARATUS AND METHOD FOR CONTROLLING INVERTER FOR DRIVING MOTOR

Abstract

An apparatus for controlling an inverter for driving a motor including a processor which includes: a current processor configured to generate a voltage command for allowing a current detection value, generated by measuring a current provided from an inverter to a motor, to follow a current command for driving the motor; a voltage modulator configured to generate a pulse width modulation signal for controlling on and off states of a switching element within the inverter with a predetermined switching frequency based on the voltage command; and a frequency determining processor configured to randomly change the switching frequency based on driving information of the motor.

Claims16

Dependent claims

An apparatus for controlling an inverter for driving a motor, the apparatus comprising a processor including:

a current processor configured to generate a voltage command for allowing a current detection value, which is generated by measuring a current provided from an inverter to a motor, to follow a current command for driving the motor;
a voltage modulator configured to generate a pulse width modulation signal for controlling on and off states of a switching element within the inverter with a predetermined switching frequency based on the voltage command;
and
a frequency determining processor configured to randomly change the switching frequency based on driving information of the motor.

1 more element

A method of controlling an inverter for driving a motor, the method comprising steps of:

generating, by a processor, a basic frequency, which is a reference for determining a switching frequency of switching elements within the inverter;
determining, by the processor, a frequency change width for changing the switching frequency based on driving information of the motor, which is driven by receiving driving power from the inverter;
randomly determining, by the processor, a constant within a preset range;
and
determining, by the processor, the switching frequency by adding the basic frequency and a value which is generated by multiplying the frequency change width and the constant.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/197,882Filed 21 Nov 2018

Priority

KR 10-2018-008288017 Jul 2018

Published

23 Jan 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

H02P 21/05
Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation: specially adapted for…
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
H02M 1/08
Details of apparatus for conversion: circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in…
H02M 1/44
Details of apparatus for conversion: circuits or arrangements for compensating for electromagnetic interference in converters or inverters

Apparatus and method for controlling inverter for driving motor

Life of this patent

Apparatus and method for controlling inverter for driving motor

Life of this patent

Abstract

Claims16