# US 12,009,736 B2 · Method and apparatus of adjusting parameter for electrical device

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- Number: US 12,009,736 B2
- Document ID: US12009736B2
- Status: Granted
- Kind: B2
- Application number: 17/281,630
- Filed: 2018-10-26
- Published: 2021-12-23
- Granted: 2024-06-11
- Earliest claimed: 2018-10-26
- Assignees: Tridonic GmbH & Co KG
- Applicants: Tridonic GmbH & Co KG
- Inventors: Yaofeng Lin; Xinhai Li; Zongjie Wu
- Web page: https://patentgrep.com/patent/US12009736B2

## CPC

- H02M 1/12: Arrangements for reducing harmonics from AC input or output
- H05B 45/36: Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
- H02M 1/0012: {Control circuits using digital or numerical techniques (in DC/DC converters H02M3/157, H02M3/33515; in DC-AC converters H02M7/53873)}
- H02M 1/0022: {the disturbance parameters being input voltage fluctuations}
- H02M 1/0048: {Circuits or arrangements for reducing losses (using snubbers H02M1/34)}
- H02M 1/4225: {using a non-isolated boost converter}
- H05B 45/355: Power factor correction [PFC]; Reactive power compensation
- H05B 45/38: using boost topology
- H02M 1/0025: {Arrangements for modifying reference values, feedback values or error values in the control loop of a converter}
- H02M 1/4208: {Arrangements for improving power factor of AC input}
- Y02B 70/10: Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

A method and apparatus of adjusting parameter for an electrical device. The method of adjusting parameter for an electrical device, the electrical device comprising a converter, the method including: calculating a performance evaluation parameter of the electrical device, when the converter using a parameter value table for running; adjusting at least one parameter value in the parameter value table of the converter according to an input parameter so as obtain the optimized performance evaluation parameter of the electrical device and use the adjusted parameter value table corresponding to the optimized performance evaluation parameter for running. Therefore, the self adapting parameter in the table will be enable to find the best performance for different input and load conditions and better performance of Harmonics will not limit the operation range.

## Claims

### Claim 1

A method of adjusting parameter for an electrical device, the electrical device comprising a converter, the method comprising:
calculating a performance evaluation parameter of the electrical device, when the converter using a parameter value table for running;
adjusting at least one parameter value in the parameter value table of the converter according to an input parameter so as obtain an optimized performance evaluation parameter of the electrical device and use the adjusted parameter value table corresponding to the optimized performance evaluation parameter for running;
wherein, the step of adjusting at least one parameter value in the parameter value table of the converter according to an input parameter so as obtain the optimized performance evaluation parameter of the electrical device further comprises:
adjusting at least one parameter value in the parameter value table of the converter into different values;
calculating the corresponding performance evaluation parameters of the electrical device, if the converter using the different adjusted parameter values for running;
comparing the corresponding performance evaluation parameters and the performance evaluation parameter before adjusting and obtaining the optimized performance evaluation parameter;
updating the parameter value table with the adjusted parameter value which corresponds to the optimized performance evaluation parameter.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the performance evaluation parameter comprising at least one of Power Factor (PF), Total Harmonic Distortion (THD) and Harmonics value.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the input parameter comprising at least one of input power, input voltage and input frequency.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the parameter value table comprising a plurality of parameter values corresponding to different input voltages respectively.

### Claim 5 (depends on 1)

The method according to claim 1, wherein, the method further comprises:
determining whether the input parameter changes; and,
calculating a performance evaluation parameter and adjusting at least one parameter value in the parameter value table when the input parameter changes.

### Claim 6 (depends on 1)

The method according to claim 1, wherein, the method further comprises:
recording the adjusted at least one parameter value in the parameter value table.

### Claim 7

An apparatus of adjusting parameter for an electrical device, the electrical device comprising a converter, the apparatus comprising:
a metering circuit configured to calculate a performance evaluation parameter of the electrical device, when the converter using a parameter value table for running;
a control unit configured to at least one parameter value in the parameter value table of the converter according to an input parameter so as obtain an optimized performance evaluation parameter of the electrical device and use the adjusted parameter value table corresponding to the optimized performance evaluation parameter for running;
wherein when the control unit adjusts at least one parameter value in the parameter value table of the converter into different values, the metering circuit further configured to calculate the corresponding performance evaluation parameters of the electrical device, if the converter using the different adjusted parameter values for running; then the control unit further configured to compare the corresponding performance evaluation parameters and the performance evaluation parameter before adjusting and obtain the optimized performance evaluation parameter; wherein, the converter then updates the parameter value table with the adjusted parameter value which corresponds to the optimized performance evaluation parameter and uses the updated parameter value table for running.

### Claim 8 (depends on 7)

The apparatus according to claim 7, wherein the performance evaluation parameter comprising at least one of Power Factor (PF), Total Harmonic Distortion (THD) and Harmonics value.

### Claim 9 (depends on 7)

The apparatus according to claim 7, wherein the input parameter comprising at least one of input power, input voltage and input frequency.

### Claim 10 (depends on 7)

The apparatus according to claim 7, wherein the parameter value table comprising a plurality of parameter values corresponding to different input voltages respectively.

### Claim 11 (depends on 7)

The apparatus according to claim 7, wherein, the control unit further configured to determine whether the input parameter changes and calculate a performance evaluation parameter and adjust at least one parameter value in the parameter value table when the input parameter changes.

### Claim 12 (depends on 7)

The apparatus according to claim 7, wherein, the control unit further configured to record the adjusted at least one parameter value in the parameter value table.

### Claim 13 (depends on 7)

The electrical device, comprising:
the apparatus according to claim 7; the converter configured to provide constant current.

### Claim 14 (depends on 13)

The electrical device according to claim 13, wherein, the electrical device is an LED driver.