GB1204148A - An electrical control circuit for an a.c. machine - Google Patents

An electrical control circuit for an a.c. machine

Info

Publication number
GB1204148A
GB1204148A GB54424/67A GB5442467A GB1204148A GB 1204148 A GB1204148 A GB 1204148A GB 54424/67 A GB54424/67 A GB 54424/67A GB 5442467 A GB5442467 A GB 5442467A GB 1204148 A GB1204148 A GB 1204148A
Authority
GB
United Kingdom
Prior art keywords
motor
gate
machine
store
pulses
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
GB54424/67A
Inventor
Seuechi Hara
Guechi Kosuge
Kazuju Inoue
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.)
Tokyu Car Corp
Tokyu Sharyo Seizo KK
Original Assignee
Tokyu Car Corp
Tokyu Sharyo Seizo KK
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 Tokyu Car Corp, Tokyu Sharyo Seizo KK filed Critical Tokyu Car Corp
Priority to GB54424/67A priority Critical patent/GB1204148A/en
Publication of GB1204148A publication Critical patent/GB1204148A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
    • 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
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

1,204,148. Control of A.C. motors TOKYU SHARYO SEIZO K.K. 29 Nov., 1967, No. 54424/67. Heading H2J. The loading condition of an A.C. motor which drives a machine tool, is detected as a variation in the power factor of the motor, the tool being retracted, or its feeding speed reduced, if the load becomes excessive. The motor voltage is applied to transformer PT having a centretapped secondary winding supplying opposed signals A, A1 to a differential amplifier DA1 for generating square-wave pulses B, B1 to a gate AND 1. The output of the gate is in the form of pulses C which occur at each zero passage of the supply voltage. A current transformer CT is similarly associated with a differential amplifier DA2 and gate AND 2, the pulses F occurring at each zero passage of the motor current. The signal C is supplied through a delay circuit PD to a multivibrator MM whose square output waveform E has a predetermined width. The signals E and F are applied to gate AND 3 which supplies a signal to store BM provided that the pulse F occurs during the period of the pulse E indicating that the load on the motor is excessive. The output from the store is fed to element MCA for controlling the cyclic operation of the machine, the store being reset after each cycle of operation of the machine. If the motor becomes overloaded the unit MCA is conditioned to take the safety measures referred to above.
GB54424/67A 1967-11-29 1967-11-29 An electrical control circuit for an a.c. machine Expired GB1204148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB54424/67A GB1204148A (en) 1967-11-29 1967-11-29 An electrical control circuit for an a.c. machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB54424/67A GB1204148A (en) 1967-11-29 1967-11-29 An electrical control circuit for an a.c. machine

Publications (1)

Publication Number Publication Date
GB1204148A true GB1204148A (en) 1970-09-03

Family

ID=10470964

Family Applications (1)

Application Number Title Priority Date Filing Date
GB54424/67A Expired GB1204148A (en) 1967-11-29 1967-11-29 An electrical control circuit for an a.c. machine

Country Status (1)

Country Link
GB (1) GB1204148A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475160A (en) * 1980-12-30 1984-10-02 Fanuc Ltd. Method of sensing abnormal condition in robot control apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475160A (en) * 1980-12-30 1984-10-02 Fanuc Ltd. Method of sensing abnormal condition in robot control apparatus

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Legal Events

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