GB2000396A - Frequency changer circuit for synchronous machines - Google Patents

Frequency changer circuit for synchronous machines

Info

Publication number
GB2000396A
GB2000396A GB7826685A GB7826685A GB2000396A GB 2000396 A GB2000396 A GB 2000396A GB 7826685 A GB7826685 A GB 7826685A GB 7826685 A GB7826685 A GB 7826685A GB 2000396 A GB2000396 A GB 2000396A
Authority
GB
United Kingdom
Prior art keywords
motors
inverter
frequency
members
control element
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
GB7826685A
Other versions
GB2000396B (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 GB2000396A publication Critical patent/GB2000396A/en
Application granted granted Critical
Publication of GB2000396B publication Critical patent/GB2000396B/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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/022—Synchronous motors
    • H02P25/024—Synchronous motors controlled by supply frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Ac-Ac Conversion (AREA)
  • Motor And Converter Starters (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

A frequency changer circuit 10 for supplying one or more synchronous electrical machines, as shown groups 1 to 4 of hysteresis motors driving high speed centrifuges, is provided with power storage members 14, 15, 16 and a frequency control element 17 for controlling the frequency of the inverter 12. The motors are connected to the inverter via switches 5-8. It is necessary to protect the motors from overloading, when one or more of the groups is switched on or off. To this end means 21, 22 are provided for sensing when the inverter voltage rises above a predetermined response level and a member 23 supplies a transient signal Figure 3 (not shown) to the frequency control element 17 when this level is exceeded to cause the motors to be briefly changed over from synchronous to asynchronous operation, thus increasing the power requirement of the motors. The member 23 causes the inverter frequency to increase suddenly by a preset amount, so that the power surplus in members 14, 15, 16 is absorbed by the motors to reduce the transient overvoltage produced by switching the motor group(s). Further reduction is possible by decreasing the voltage of rectifier 13 through members 19, 28 also controlled by member 22. <IMAGE>
GB7826685A 1977-06-13 1978-06-12 Transverter circuit Expired GB2000396B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2726534A DE2726534C2 (en) 1977-06-13 1977-06-13 Converter circuit

Publications (2)

Publication Number Publication Date
GB2000396A true GB2000396A (en) 1979-01-04
GB2000396B GB2000396B (en) 1982-01-06

Family

ID=6011392

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7826685A Expired GB2000396B (en) 1977-06-13 1978-06-12 Transverter circuit

Country Status (4)

Country Link
JP (1) JPS547126A (en)
DE (1) DE2726534C2 (en)
GB (1) GB2000396B (en)
NL (1) NL7806416A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2356068A (en) * 1999-11-05 2001-05-09 Urenco Deutschland Gmbh Method for operating and controlling hysteresis motors

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3029358A1 (en) * 1980-08-01 1982-03-11 Siemens AG, 1000 Berlin und 8000 München DEVICE FOR BRIDGING SHORT-TERM NETWORK OUTPUTS FOR INTERMEDIATE VOLTAGE CONVERTERS
DE3707336A1 (en) * 1987-03-07 1988-09-15 Zinser Textilmaschinen Gmbh Arrangement for supplying at least one AC or DC motor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2356068A (en) * 1999-11-05 2001-05-09 Urenco Deutschland Gmbh Method for operating and controlling hysteresis motors
GB2356068B (en) * 1999-11-05 2003-11-12 Urenco Deutschland Gmbh Method for operating and controlling hysteresis motors

Also Published As

Publication number Publication date
GB2000396B (en) 1982-01-06
DE2726534C2 (en) 1979-07-12
DE2726534B1 (en) 1978-11-09
JPS547126A (en) 1979-01-19
NL7806416A (en) 1978-12-15

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Legal Events

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