# US 10,122,264 B2 · Control device and program product for reducing a noise peak level

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,122,264 B2
- Document ID: US10122264B2
- Status: Granted
- Kind: B2
- Application number: 15/076,580
- Filed: 2016-03-21
- Published: 2017-09-21
- Granted: 2018-11-06
- Earliest claimed: 2016-03-21
- Assignees: Shindengen Electric Manufacturing Co., Ltd.
- Applicants: Shindengen Electric Manufacturing Co., Ltd.
- Inventors: Takayuki Kondo; Tomohiro Tanabe
- Web page: https://patentgrep.com/patent/US10122264B2

## CPC

- H02M 1/44: Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
- G05B 15/02: electric
- H02M 3/10: using discharge tubes with control electrode or semiconductor devices with control electrode (H02M3/07 takes precedence)
- 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)
- G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G)

## Abstract

The control device includes a control signal supply unit, a frequency changing unit, and a storage unit. The control signal supply unit generates a control signal, and supplies the generated control signal to the switching element. The storage unit stores a frequency table defining a change value of a frequency of the control signal. The frequency changing unit changes the frequency of the control signal every time a predetermined time period elapses, according to the change value defined in the frequency table.

## Claims

### Claim 1

A control device that controls a frequency of a control signal for controlling on and off of a switching element, the control device comprising:
a storage unit configured to store a frequency table defining a change value for a frequency of the control signal; and
a frequency changing unit configured to change the frequency of the control signal, independent of an input voltage, every time a predetermined time period elapses, according to the change value defined in the frequency table,
wherein the frequency changing unit changes the frequency of the control signal according to the change value defined in the frequency table, and
wherein the frequency changing unit performs one of:
changing of the frequency of the control signal to a predetermined upper limit, when a value obtained by adding the change value defined in the frequency table to the frequency of the control signal is greater than the upper limit, and
changing of the frequency of the control signal to a predetermined lower limit, when a value obtained by subtracting the change value defined in the frequency table from the frequency of the control signal is smaller than the lower limit.