H02P7/298 - CPC Classification Index

ClassID:

218269 ⎘

H02P7/298 - 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 and field supply

Sub-classes:

H02P7/2985 » {whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value} 6

Recent Application in this class:

20240063735

2024-02-22

ROTOR FLUX TIME DELAY REDUCTION THROUGH PERMANENT MAGNETS FOR ELECTRICALLY EXCITED SYNCHRONOUS MACHINES

20230106803

2023-04-06

Hybrid system to overhaul a DC locomotive

20180335006

2018-11-22

Drive train

20170328343

2017-11-16

System and method for improving speed control of a pitch drive system of a wind turbine

20170297045

2017-10-19

SYSTEM FOR REGULATING THE POWER SUPPLY FOR THE MOTOR OF AN AIRLESS PAINT SPRAY PUMP

20170205778

2017-07-20

Electric motor and motor controller

20170093257

2017-03-30

Rotary electric machine and rotary electric machine controller

20150260160

2015-09-17

System and method for improving speed control of a pitch drive system of a wind turbine

20140239862

2014-08-28

Control of a brushless electrical machine

#10

20140055077

2014-02-27

Electric motor and motor controller

#11

20130314008

2013-11-28

Energy storage device for a separately excited electrical machine

#12

20110109253

2011-05-12

Motor controlling circuit for multiple control modes

#13

20100162918

2010-07-01

Traction control for DC electric motor

#14

20100135791

2010-06-03

Method and apparatus for powering a pitch control system

#15

20090121485

2009-05-14

Wind power facility having activation circuit for a speed-limited and voltage-source-protective operation of a pitch-drive series-wound motor at generator torques

#16