JPS5556495A - A.c. motor controller - Google Patents
A.c. motor controllerInfo
- Publication number
- JPS5556495A JPS5556495A JP12811678A JP12811678A JPS5556495A JP S5556495 A JPS5556495 A JP S5556495A JP 12811678 A JP12811678 A JP 12811678A JP 12811678 A JP12811678 A JP 12811678A JP S5556495 A JPS5556495 A JP S5556495A
- Authority
- JP
- Japan
- Prior art keywords
- amplifier
- stall
- stall detection
- signal
- circuit
- 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.)
- Granted
Links
Landscapes
- Motor And Converter Starters (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
PURPOSE: To reduce power loss by eddy current flowing at stalled operation, a stall detection circuit is used which detects the stall on the basis of an error signal obtained by comparing detected voltage with the reference value.
CONSTITUTION: In this stall detection circuit 32, the reference voltage signal and detected voltage signal enter the amplifier 35 through the resistances 33, 34 respectively. An error signal between both signals enters the amplifier 39 through the resistance 37. The amplifier 39, together with the Zener diode 42 in parallel, constitutes a switching circuit and allows the transistor 43 to become conductive when the output from the amplifier 35 exceeds the reference error value. This excites the coil of the relay 44, the contact circuit of which acts to generate a stall detection signal to thereby control an a.c. motor.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53128116A JPS6013400B2 (en) | 1978-10-18 | 1978-10-18 | AC motor control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53128116A JPS6013400B2 (en) | 1978-10-18 | 1978-10-18 | AC motor control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5556495A true JPS5556495A (en) | 1980-04-25 |
JPS6013400B2 JPS6013400B2 (en) | 1985-04-06 |
Family
ID=14976766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53128116A Expired JPS6013400B2 (en) | 1978-10-18 | 1978-10-18 | AC motor control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6013400B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5899297A (en) * | 1981-12-09 | 1983-06-13 | Fuji Electric Co Ltd | System for detecting shift of induction motor to unstable region by inverter driving control |
JPS6447295A (en) * | 1987-08-11 | 1989-02-21 | Toshiba Corp | Motor controller |
WO2000019593A1 (en) * | 1998-09-25 | 2000-04-06 | Fumito Komatsu | Synchronous motor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63178998A (en) * | 1987-01-12 | 1988-07-23 | トウフク株式会社 | Slurry high-pressure force-feed method and device |
-
1978
- 1978-10-18 JP JP53128116A patent/JPS6013400B2/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5899297A (en) * | 1981-12-09 | 1983-06-13 | Fuji Electric Co Ltd | System for detecting shift of induction motor to unstable region by inverter driving control |
JPS6447295A (en) * | 1987-08-11 | 1989-02-21 | Toshiba Corp | Motor controller |
WO2000019593A1 (en) * | 1998-09-25 | 2000-04-06 | Fumito Komatsu | Synchronous motor |
US6424114B1 (en) | 1998-09-25 | 2002-07-23 | Fumito Komatsu | Synchronous motor |
Also Published As
Publication number | Publication date |
---|---|
JPS6013400B2 (en) | 1985-04-06 |
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