GB1515332A - Monitoring a drive system comprising a plurality of rotating field motors - Google Patents

Monitoring a drive system comprising a plurality of rotating field motors

Info

Publication number
GB1515332A
GB1515332A GB2288575A GB2288575A GB1515332A GB 1515332 A GB1515332 A GB 1515332A GB 2288575 A GB2288575 A GB 2288575A GB 2288575 A GB2288575 A GB 2288575A GB 1515332 A GB1515332 A GB 1515332A
Authority
GB
United Kingdom
Prior art keywords
phase
motor
motors
representing
leading edge
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.)
Expired
Application number
GB2288575A
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 GB1515332A publication Critical patent/GB1515332A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/18—Indicating phase sequence; Indicating synchronism
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/38—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to both voltage and current; responsive to phase angle between voltage and current
    • H02H3/382—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to both voltage and current; responsive to phase angle between voltage and current involving phase comparison between current and voltage or between values derived from current and voltage
    • 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
    • H02H7/0805—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 for synchronous motors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

1515332 Protecting motor installations SIEMENS AG 23 May 1975 [11 June 1974] 22885/75 Heading H2K A monitoring arrangement for a plurality of motors such as 3 determines, for each motor in turn, whether the phase angle between a current and a voltage supplied to the motor is within a predetermined range. The motors may be three-phase hysterisis motors driving centrifuges, phase angles outside the predetermined range signifying asynchronous operation or failure of one of the phases of the supply. A phase angle comparator 19b receives a first alternating signal u representing one of the phase-to-phase voltages and a second alternating signal i 2 , derived from a scanner 25, representing one of the phase currents of each motor in turn. After converting (20, 32) both alternating signals into square waves, a first short pulse c<SP>1</SP> is generated a fixed delay after the leading edge of the voltage square wave and a second short pulse b<SP>1</SP> is generated at the leading edge of the current square wave. If the motor 3 is running normally, these pulses will coincide, and this is detected by a NAND gate 42 to provide, via a pulse lengthening circuit 43, a steady output signal s2.
GB2288575A 1974-06-11 1975-05-23 Monitoring a drive system comprising a plurality of rotating field motors Expired GB1515332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742428053 DE2428053C3 (en) 1974-06-11 1974-06-11 Method for monitoring a drive system and monitoring circuit for carrying out the method

Publications (1)

Publication Number Publication Date
GB1515332A true GB1515332A (en) 1978-06-21

Family

ID=5917817

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2288575A Expired GB1515332A (en) 1974-06-11 1975-05-23 Monitoring a drive system comprising a plurality of rotating field motors

Country Status (3)

Country Link
DE (1) DE2428053C3 (en)
GB (1) GB1515332A (en)
NL (1) NL7506415A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168497A (en) * 1984-12-18 1986-06-18 Toshiba Kk Load state detecting apparatus of an induction motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3151904C2 (en) * 1981-12-30 1985-12-12 Uranit GmbH, 5170 Jülich Method for optimizing the power consumption of a large number of hysteresis motors connected in parallel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168497A (en) * 1984-12-18 1986-06-18 Toshiba Kk Load state detecting apparatus of an induction motor
GB2168497B (en) * 1984-12-18 1989-03-30 Toshiba Kk Load state detecting apparatus of an induction motor

Also Published As

Publication number Publication date
NL7506415A (en) 1976-03-31
DE2428053A1 (en) 1976-05-20
DE2428053B2 (en) 1977-12-08
DE2428053C3 (en) 1978-08-24

Similar Documents

Publication Publication Date Title
US3919609A (en) Method and circuit for reducing the torque ripple of a rotating-field machine
US5202614A (en) Self-commutating, back-emf sensing, brushless dc motor controller
US3887862A (en) Auxiliary extinguishing arrangement for the inverters in an intermediate link converter
GB1362849A (en) Static power conversion ciruit
US3784888A (en) Control for commutatorless motor
GB1431832A (en) Converter apparatus
WO1982003692A1 (en) Speed detecting device
GB1362467A (en) Electric power converts
GB1515332A (en) Monitoring a drive system comprising a plurality of rotating field motors
GB1441374A (en) Static frequency changers
EP0070693B1 (en) A control system for a synchronous motor employed as a servomotor
GB1275715A (en) Speed control system for hall effect motors
KR830009681A (en) Slip Recovery Winding Rotor Motor Drive System
US4937530A (en) Apparatus for monitoring phase voltages of a polyphase tachometer generator to detect phase failures
US3313992A (en) Braking circuit
GB1188145A (en) Method of Controlling the Torque of an Asynchronous Machine
GB1283285A (en) Improvements in electric motor systems
US3525913A (en) Pullout protection for synchronous machines
GB1190847A (en) Electric Inverting Apparatus
GB1502067A (en) Electric motor overload protection
US4309647A (en) Commutatorless motor device
GB1494202A (en) Monitoring a drive system
SU606182A1 (en) Device for remote protection of electric power transmission line
SU1495957A1 (en) Device for control of self-excited inverter
SU665386A1 (en) Ac drive

Legal Events

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