Stator and electric motor with cancel coil for reducing unbalanced magnetic flux
US-10511200-B2 · Dec 17, 2019 · US
for auxiliary purposes, e.g. damping or commutating
for auxiliary purposes, e.g. damping or commutating · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02K3/20 |
| Official title | for auxiliary purposes, e.g. damping or commutating |
| Display label | for auxiliary purposes, e.g. damping or commutating |
| Total patents | 135 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 13 |
| 2017 | 12 |
| 2018 | 14 |
| 2019 | 24 |
| 2020 | 27 |
| 2021 | 9 |
| 2022 | 16 |
| 2023 | 6 |
| 2024 | 7 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Wedges with q-axis damper circuits
US-2019334398-A1 · Oct 31, 2019 · US
Sealed switched reluctance motor
US-2019334422-A1 · Oct 31, 2019 · US
Electric motor
US-2019334399-A1 · Oct 31, 2019 · US
Electromechanical actuator damping
US-10404121-B2 · Sep 3, 2019 · US
Reduced reel motor disturbances in a tape drive system
US-10374475-B2 · Aug 6, 2019 · US
Motor device, motor driving control device and motor driving method
US-2019238074-A1 · Aug 1, 2019 · US
Sealed switched reluctance motor
US-10348172-B2 · Jul 9, 2019 · US
Lamination for main generator rotor in an integrated drive generator
US-2019207450-A1 · Jul 4, 2019 · US
Apparatuses, methods, and systems for starting an exciterless synchronous generator
US-2019207484-A1 · Jul 4, 2019 · US
Stator, motor, and blower
US-2019199155-A1 · Jun 27, 2019 · US
Damped electric motor
US-2019165621-A1 · May 30, 2019 · US
Brushless direct current motor
US-2019157929-A1 · May 23, 2019 · US
Systems and methods for exciterless synchronous machines
US-2019097501-A1 · Mar 28, 2019 · US
Counter-field winding in electrical generator
US-10177698-B1 · Jan 8, 2019 · US
Rotating electric machine
US-2018358857-A1 · Dec 13, 2018 · US
Rotating Electric Machine and Vehicle Equipped with Rotating Electric Machine
US-2018342914-A1 · Nov 29, 2018 · US
Phantom electric motor system with parallel coils
US-10128789-B2 · Nov 13, 2018 · US
Doubly stator-fed synchronous generator
US-10122307-B2 · Nov 6, 2018 · US
Systems and methods concerning exciterless synchronous machines
US-10097123-B2 · Oct 9, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02K3/20?
- CPC H02K3/20 is the Cooperative Patent Classification code for “for auxiliary purposes, e.g. damping or commutating.”
- How many patents are filed under CPC H02K3/20 (for auxiliary purposes, e.g. damping or commutating)?
- Our database includes 135 publications tagged with this CPC code.
- Is patent activity under CPC H02K3/20 growing?
- Publication counts under this code: 7 in 2024 vs 1 in 2025 (latest complete years).