Patents
US 9620999 B2: High conductivity rotor cage for line start permanent magnet motor
- Granted
- 2017-04-11
- Filed
- 2014-04-22 application 14258323
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method for synchronizing a high inertial load with a line-start synchronous motor involves providing a rotor core with rotor bars being formed of a highly conductive material. In accordance with one aspect of the method, a user is directed to operatively couple a load to the motor and drive the load from start to at least near synchronous speed during steady state operation of the motor with the load coupled thereto. The load has an inertia that is greater than an inertia associated with a load driven by a like motor subjected to an equivalent range of starting current but having rotor bars formed from a conductive material having a conductivity lower than that the highly conductive material.
Source: PVGPATDIS, file of 2026-04-10 (ipg170411.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Baldor Electric Company 43 patents | US company or organization | Barling, AR | BALDOR ELECTRIC CO SEC filer FUZZY low confidence: same name (legal endings aside), one of each nationally | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Robert F. McElveen | Anderson, SC | 14 | PVGPATDIS, file of 2026-04-10 | |
| Richard J. Budzynski | Simpsonville, SC | 4 | PVGPATDIS, file of 2026-04-10 | |
| Michael J. Melfi | Broadview Heights, OH | 8 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| H02K | Dynamo-electric machines | H02K21/46 | PVGPATDIS, file of 2026-04-10 |
| H02P | Control or regulation of electric motors, electric generators or dynamo-electric converters; controlling transformers, reactors or choke coils | H02P1/46 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2026-09-28 | Assignment Assignment of assignor's interest | ABB MOTORS AND MECHANICAL, INC. signed 2026-06-08 | ABB SCHWEIZ AG BADEN | 76167/619 | PASDL, file of 2026-10-15 |
| 2026-08-05 | Name change Change of name | BALDOR ELECTRIC COMPANY signed 2018-02-26 | ABB MOTORS AND MECHANICAL INC. FORT SMITH, AR | 76152/651 | PASDL, file of 2026-10-15 |
| 2014-04-22 | Assignment Assignment of assignor's interest | BUDZYNSKI, RICHARD J. signed 2014-04-07 MCELVEEN, ROBERT F. signed 2014-04-07 MELFI, MICHAEL J. signed 2014-04-14 | BALDOR ELECTRIC COMPANY FORT SMITH, AR | 32726/903 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.