H02P7/288 - CPC Classification Index

ClassID:

218266 ⎘

H02P7/288 - CPC Classification

Classification description:

Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using variable impedance

Recent Application in this class:

20200119671

2020-04-16

STEPLESS SPEED CONTROL CIRCUIT OF ELECTRIC SPRAYER

20200021215

2020-01-16

Load driving circuit

20160291445

2016-10-06

Miniature stabilized unmanned aerial vehicle gimbal

20160065111

2016-03-03

VOICE COIL MOTOR DRIVING CIRCUIT

20140062347

2014-03-06

Electronic fitness device

20120007534

2012-01-12

ROTATION SPEED CONTROL DEVICE FOR A HEAT-DISSIPATING FAN

20110050316

2011-03-03

Power transistor with turn off control and method for operating

20100145548

2010-06-10

FAN DRIVING CIRCUIT

20100109597

2010-05-06

Method and apparatus for quiet fan speed control

#10

20090072775

2009-03-19

Method and apparatus for quiet fan speed control

#11

20080253752

2008-10-16

Method for detecting and controlling output characteristics of a DC motor and a self-propelled apparatus using the same

#12

20080181586

2008-07-31

Fan rotation speed control circuit of power supply system

#13

20080002953

2008-01-03

Device for the incremental control of a direct-current motor for the cooling fan of a motor vehicle

#14

20070114963

2007-05-24

Method and apparatus for quiet fan speed control

#15

20070057653

2007-03-15

Fan speed controlling circuit

#16

20060291821

2006-12-28

Series resistor assembly for an electric motor, circuit arrangement comprising a series resistor assembly for operating an electric motor and use of said assembly

#17

20060076912

2006-04-13

Start-up circuit for DC fan

#18

20050264253

2005-12-01

Linear power module