JPS55166486A - Starter of electric motor - Google Patents
Starter of electric motorInfo
- Publication number
- JPS55166486A JPS55166486A JP7223279A JP7223279A JPS55166486A JP S55166486 A JPS55166486 A JP S55166486A JP 7223279 A JP7223279 A JP 7223279A JP 7223279 A JP7223279 A JP 7223279A JP S55166486 A JPS55166486 A JP S55166486A
- Authority
- JP
- Japan
- Prior art keywords
- starting
- electric motor
- current
- starter
- voltage
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- 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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/26—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor
- H02P1/34—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual polyphase induction motor by progressive reduction of impedance in secondary circuit
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
Abstract
PURPOSE:To provide a low cost and compact starter by a method wherein starting rheostats are short-circuited in order in accordance with a voltage which is proportional to a starting current generated between arbitrary terminals of a starting rheostat. CONSTITUTION:When an electric motor IM starts, a current i flows on the secondary side of the electric motor IM to generate a voltage Ei corresponding to i between arbitrary terminals of a starting rheostat R4. When the electric motor IM is accelerated, the current i decreases to lower the voltage Ei, and accordingly relays PR1-PR4 are released in order. Then, contacts MC1-MC4 for starting resistance short-circuits are driven by the b contact through delay relays TR1-TR4, and starting resistances R1-R4 are short-circuited in order. This constitution can dispense with a current transformer for current detection and with the connection of a starter to a primary circuit of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7223279A JPS55166486A (en) | 1979-06-11 | 1979-06-11 | Starter of electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7223279A JPS55166486A (en) | 1979-06-11 | 1979-06-11 | Starter of electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55166486A true JPS55166486A (en) | 1980-12-25 |
Family
ID=13483312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7223279A Pending JPS55166486A (en) | 1979-06-11 | 1979-06-11 | Starter of electric motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55166486A (en) |
-
1979
- 1979-06-11 JP JP7223279A patent/JPS55166486A/en active Pending
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