GB2001213A - Control arrangement for ac motors - Google Patents

Control arrangement for ac motors

Info

Publication number
GB2001213A
GB2001213A GB7829657A GB7829657A GB2001213A GB 2001213 A GB2001213 A GB 2001213A GB 7829657 A GB7829657 A GB 7829657A GB 7829657 A GB7829657 A GB 7829657A GB 2001213 A GB2001213 A GB 2001213A
Authority
GB
United Kingdom
Prior art keywords
converter
signal
circuit
oscillation
control
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
Application number
GB7829657A
Other versions
GB2001213B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB2001213A publication Critical patent/GB2001213A/en
Application granted granted Critical
Publication of GB2001213B publication Critical patent/GB2001213B/en
Expired legal-status Critical Current

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
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)
  • Inverter Devices (AREA)
  • Control Of Multiple Motors (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

For supplying groups (1, 2, 3, 4) of synchronous motors, preferably hysteresis motors, alternating current is supplied from an AC power supply (19) to a controllable AC/DC converter (10). The output of the converter (10) is connected via an intermediate circuit (12) having power storage means to a DC/AC converter (8), whose output supplies the motor groups (1, 2, 3, 4). Reactive power compensating means (7) are also connected to converter (8) whose frequency is determined by signal uf applied to control unit (18). Control means (20, 21 and 17 or 27 to 32) control the voltage V1 of converter (10) in accordance with a control signal us and an additional signal uz superimposed on the signal us, the signal uz being proportional to the current in the intermediate circuit (12) and hence to the amplitude of the "intermediate circuit oscillation," which is of low frequency relative to the operating frequency of converter (8) and is produced by self-excitation in the system comprising the motor groups (1-4), capacitors (7) and the circuit (12). The oscillation occurs mainly during simultaneous run-up of the motor groups just before they enter into synchronism and leads to cycling between synchronous and asynchronous operation and unstable operation of the converter. The oscillation is reduced or eliminated by the signal uz whose effect is equivalent to adding a stabilising resistor to the circuit (12). <IMAGE>
GB7829657A 1977-07-18 1978-07-12 Control arrangement Expired GB2001213B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772732450 DE2732450C2 (en) 1977-07-18 1977-07-18 DC link converter circuit

Publications (2)

Publication Number Publication Date
GB2001213A true GB2001213A (en) 1979-01-24
GB2001213B GB2001213B (en) 1982-01-06

Family

ID=6014220

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7829657A Expired GB2001213B (en) 1977-07-18 1978-07-12 Control arrangement

Country Status (4)

Country Link
JP (1) JPS5421533A (en)
DE (1) DE2732450C2 (en)
GB (1) GB2001213B (en)
NL (1) NL7807433A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0817366A2 (en) * 1996-06-28 1998-01-07 Progress Ag Device for operating alternately several AC synchronous servo-motors and wire straightening machine with such a device
USD990882S1 (en) * 2021-02-22 2023-07-04 Mr. Bar-B-Q Products Llc Caddy

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59789B2 (en) * 1973-12-06 1984-01-09 東京電力株式会社 Reactance detection method
CA1251642A (en) * 1983-11-02 1989-03-28 Kazumi Arakawa Molten metal discharging device
JPS6099462A (en) * 1983-11-02 1985-06-03 Toshiba Ceramics Co Ltd Device for discharging molten metal
DE3406941C2 (en) * 1984-02-25 1986-05-07 Didier-Werke Ag, 6200 Wiesbaden Fireproof wear parts for slide locks
DE3714680A1 (en) * 1987-05-02 1988-11-17 Didier Werke Ag FIRE-RESISTANT WEAR PARTS FOR SPOUT CLOSURES
CN106505586B (en) * 2016-10-21 2019-09-20 国网新疆电力有限公司电力科学研究院 High power low-frequency shaking test power supply device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2132179B2 (en) * 1971-06-29 1974-06-06 Siemens Ag, 1000 Berlin U. 8000 Muenchen Device for electrical oscillation damping of an induction machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0817366A2 (en) * 1996-06-28 1998-01-07 Progress Ag Device for operating alternately several AC synchronous servo-motors and wire straightening machine with such a device
EP0817366A3 (en) * 1996-06-28 1998-04-08 Progress Ag Device for operating alternately several AC synchronous servo-motors and wire straightening machine with such a device
USD990882S1 (en) * 2021-02-22 2023-07-04 Mr. Bar-B-Q Products Llc Caddy

Also Published As

Publication number Publication date
DE2732450A1 (en) 1979-02-01
DE2732450C2 (en) 1984-09-20
NL7807433A (en) 1979-01-22
GB2001213B (en) 1982-01-06
JPS5421533A (en) 1979-02-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee