US 9,871,466 B2Granted

Inverter switching frequency control method and apparatus

AssigneeHuawei Technologies Co., Ltd.

InventorsHaibin Guo, Kai Xin, Li Lu

Life of this patent

Estimating the term…

Loading patent…

Abstract

An inverter control method, apparatus, and system are provided. The method in the embodiments of the present invention includes obtaining power distribution line graph of an inverter switch according to an output power and an input voltage that are of an inverter; when an area to which the inverter belongs is a first area and the inverter switch works at a second frequency, switching the inverter switch to a first frequency; and when the area to which the inverter belongs is a second area and the inverter switch works at the first frequency, switching the inverter switch to the second frequency. In the embodiments of the present invention, whether a working frequency of an inverter switch needs to be changed is determined according to an output power and an input voltage, which improves control efficiency, thereby effectively improving conversion efficiency of an inverter.

Claims14

Dependent claims

An inverter control method comprising:

acquiring a power distribution line graph of an inverter comprising:
a power distribution curve;
a first area corresponding to a first switching on/off frequency, wherein the first area comprises a first range of preset input voltages and a first range of preset output powers;
and
a second area corresponding to a second switching on/off frequency, wherein the second area comprises a second range of preset input voltages and a second range of preset output powers;
acquiring an input voltage, an output power, and an operating switching on/off frequency of the inverter;
determining a determined area based, at least in part, on the input voltage, the output power, and a preset output power corresponding to the input voltage;
switching the operating switching on/off frequency of the inverter to the first switching on/off frequency when the determined area is the first area and the operating switching on/off frequency is in the second area;
and
switching the operating switching on/off frequency of the inverter to the second switching on/off frequency when the determined area is the second area and the operating switching on/off frequency is in the first area.

7 more elements

An inverter apparatus, comprising:

an inverter;
and
an inverter control apparatus,
wherein the inverter control apparatus is configured to:
acquire a power distribution line graph of the inverter, wherein the power distribution line graph comprises:
a power distribution curve;
a first area corresponding to a first switching on/off frequency, wherein the first area comprises a first range of preset input voltages and a first range of preset output powers;
and
a second area corresponding to a second switching on/off frequency, wherein the second area comprises a second range of preset input voltages and a second range of preset output powers;
acquire an input voltage, an output power, and an operating switching on/off frequency of the inverter;
determine a determined area based, at least in part, on the input voltage, the output power, and a preset output power corresponding to the input voltage;
switch the operating switching on/off frequency of the inverter to the first switching on/off frequency when the determined area is the first area and the operating switching on/off frequency is in the second area;
and
switch the operating switching on/off frequency of the inverter to the second switching on/off frequency when the determined area is the second area and the operating switching on/off frequency is in the first area.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/747,744Filed 23 Jun 2015
Priority: CN 2014 1 029336625 Jun 2014
Published: US 2015/0381073 A131 Dec 2015
Granted: 16 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H02M 7/537
Using devices of a triode or transistor type requiring continuous application of a control signal: using semiconductor devices only, e.g. single…
H02M 7/53871
In a bridge configuration: with automatic control of output voltage or current
H02M 1/0032
Details of control, feedback or regulation circuits: control circuits allowing low power mode operation, e.g. in standby mode
H02M 1/0054
Circuits or arrangements for reducing losses: transistor switching losses