H02P7/24 - CPC Classification Index

ClassID:

218254 ⎘

H02P7/24 - 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

Sub-classes:

H02P7/245 » {whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value} 7
H02P7/26 » using discharge tubes 0
H02P7/28 » using semiconductor devices 89

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