JPS3912708Y1 - - Google Patents
Info
- Publication number
- JPS3912708Y1 JPS3912708Y1 JP6458762U JP6458762U JPS3912708Y1 JP S3912708 Y1 JPS3912708 Y1 JP S3912708Y1 JP 6458762 U JP6458762 U JP 6458762U JP 6458762 U JP6458762 U JP 6458762U JP S3912708 Y1 JPS3912708 Y1 JP S3912708Y1
- Authority
- JP
- Japan
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/093—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against increase beyond, or decrease below, a predetermined level of rotational speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/06—Rotor flux based control involving the use of rotor position or rotor speed sensors
- H02P21/08—Indirect field-oriented control; Rotor flux feed-forward control
- H02P21/09—Field phase angle calculation based on rotor voltage equation by adding slip frequency and speed proportional frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/08—Controlling based on slip frequency, e.g. adding slip frequency and speed proportional frequency
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US85869759 US3059159A (en) | 1959-12-10 | 1959-12-10 | Overspeed protection for adjustable speed drives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS3912708Y1 true JPS3912708Y1 (US20030227983A1-20031211-M00013.png) | 1964-05-14 |
Family
ID=25328935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6458762U Expired JPS3912708Y1 (US20030227983A1-20031211-M00013.png) | 1959-12-10 | 1962-11-22 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3059159A (US20030227983A1-20031211-M00013.png) |
| JP (1) | JPS3912708Y1 (US20030227983A1-20031211-M00013.png) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3210629A (en) * | 1962-03-30 | 1965-10-05 | Westinghouse Electric Corp | Plural cascade motor control with stall prevention |
| US3250974A (en) * | 1962-10-25 | 1966-05-10 | Emerson Electric Co | System for controlling the speed or torque of one or more induction motors |
| US3477000A (en) * | 1966-11-03 | 1969-11-04 | Emerson Electric Co | Speed control system incorporating regenerative drive |
| US3519909A (en) * | 1967-10-23 | 1970-07-07 | Westinghouse Electric Corp | Adjustable speed motor drive using a wound rotor of an induction motor mechanically connected to the armature of a d.c. motor,both electrically connected by a control system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2066508A (en) * | 1936-03-25 | 1937-01-05 | Hugh E Young | Electrical control system |
| US2319625A (en) * | 1937-08-28 | 1943-05-18 | John K Ostrander | Variable speed motor system |
| US2288338A (en) * | 1937-10-27 | 1942-06-30 | Gen Electric | Electric motor control system |
| US2359145A (en) * | 1943-01-28 | 1944-09-26 | Westinghouse Electric & Mfg Co | Variable speed motor drive |
-
1959
- 1959-12-10 US US85869759 patent/US3059159A/en not_active Expired - Lifetime
-
1962
- 1962-11-22 JP JP6458762U patent/JPS3912708Y1/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3059159A (en) | 1962-10-16 |
