GB1438538A – Motor speed control
– Google Patents
GB1438538A – Motor speed control
– Google Patents
Motor speed control
Info
Publication number
GB1438538A
GB1438538A
GB1926973A
GB1926973A
GB1438538A
GB 1438538 A
GB1438538 A
GB 1438538A
GB 1926973 A
GB1926973 A
GB 1926973A
GB 1926973 A
GB1926973 A
GB 1926973A
GB 1438538 A
GB1438538 A
GB 1438538A
Authority
GB
United Kingdom
Prior art keywords
speed
scr
rotor
circuit
resistor
Prior art date
1972-10-25
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
GB1926973A
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.)
VERGARA J D GALVAN R
Original Assignee
VERGARA J D GALVAN R
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.)
1972-10-25
Filing date
1973-04-24
Publication date
1976-06-09
1972-10-25
Priority claimed from US00300862A
external-priority
patent/US3810253A/en
1973-04-24
Application filed by VERGARA J D GALVAN R
filed
Critical
VERGARA J D GALVAN R
1976-06-09
Publication of GB1438538A
publication
Critical
patent/GB1438538A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
H02P25/24—Variable impedance in stator or rotor circuit
H02P25/26—Variable impedance in stator or rotor circuit with arrangements for controlling secondary impedance
H—ELECTRICITY
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02K—DYNAMO-ELECTRIC MACHINES
H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
H02K11/30—Structural association with control circuits or drive circuits
H02K11/33—Drive circuits, e.g. power electronics
H—ELECTRICITY
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02K—DYNAMO-ELECTRIC MACHINES
H02K17/00—Asynchronous induction motors; Asynchronous induction generators
H02K17/02—Asynchronous induction motors
H02K17/30—Structural association of asynchronous induction motors with auxiliary electric devices influencing the characteristics of the motor or controlling the motor, e.g. with impedances or switches
H—ELECTRICITY
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02K—DYNAMO-ELECTRIC MACHINES
H02K5/00—Casings; Enclosures; Supports
H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
H02K5/225—Terminal boxes or connection arrangements
H—ELECTRICITY
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02K—DYNAMO-ELECTRIC MACHINES
H02K9/00—Arrangements for cooling or ventilating
H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Abstract
1438538 Automatic control of speed J D VERGARA R GALVAN and F LEAL 24 April 1973 [25 Oct 1972] 19269/73 Heading G3R [Also in Division H2] A system for controlling the speed of a multiphase induction motor, having a rotor assembly including at least three rotor windings and an inversely related speed and induced rotor winding voltage characteristic, comprises a plurality of controlled rectifiers connected to the rotor windings and arranged to be selectively made conductive to short-circuit the rotor windings, and circuit means energizable by the induced rotor winding voltage and connected to provide a D.C. signal of one polarity to the gate of each controlled rectifier, the D.C. signal determining the amplitude of forward voltage required across the rectifiers to render them conductive, the D.C. signal varying in amplitude in response to changes in rotor winding voltage, and the induced rotor winding voltage varying in response to changes in the motor speed whereby the instants at which the rectifiers are made conductive are varied to enable the maintenance of the motor speed substantially at a selected set value. The rotor windings may be delta or star-connected and Fig. 1 shows the latter configuration for a three phase motor 10, whose rotor windings are connected to silicon controlled rectifiers 22, 24, 34, 36 receiving firing signals from a master control circuit 66, details of which are shown in Fig. 2. Terminals 80, 82, 84 receive rotor winding voltage signals from slip rings 68, 70, 72, which signals are applied to a rectifier and resistor circuit 86, 88, 90, 92, 94, 96, 98, whose positive output is applied to the control electrodes of the SCR’s 22, 24, 34, 36 through a variable resistance 100, diodes 102, 104, 106, 108, output terminals 58, 60, 62, 64 and slip rings 50, 52, 54, 56. Resistor 100 is adjusted to cause the SCR’s to conduct at a certain point and hence determine a selected speed for a corresponding motor load. Load and speed changes cause corresponding variation of the rotor winding voltages, which in turn vary the firing current in circuit 66 and the voltages applied to the SCR’s, whose instants of conduction are thus correspondingly varied to provide a self-regulating action maintaining the speed at the selected value. Resistor 100 may be replaced by a resistance of positive or negative temp. coefficeint, a tunnel diode, an electronic photo-cell, a resistivity-varying electrode or a magnetic control with a rectifier bridge. The SCR characteristic of firing current/forward breakdown voltage is also discussed. In a modification, Figs. 3 and 4 (not shown), the circuit 66 has only one output (64) to one slip ring (56) connected to the four diodes 102, 104, 106, 108. The embodiment of Fig. 5 uses a star-connected arrangement of diodes 112, 118, 120 and SCR’s 110, 114, 116 to control the rotor windings, the star point 122 and diodes 126, 128, 130, connected to the control electrodes of the SCR’s being connected through slip rings 124, 132 to a variable resistor 134 for selecting the motor speed. In a modification similar to Fig. 5, slip rings are omitted and members 122, 126, 128, 130 are directly connected to the respective ends of a light-responsive resistor or photo-cell (136), which is adjustable by a light beam to set the desired motor speed, Fig. 6 (not shown). A typical operation of the embodiments of Figs. 1 and 3 is described, Figs. 8, 9 and 10 (not shown).
GB1926973A
1972-10-25
1973-04-24
Motor speed control
Expired
GB1438538A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US00300862A
US3810253A
(en)
1971-08-24
1972-10-25
Motor speed control
Publications (1)
Publication Number
Publication Date
GB1438538A
true
GB1438538A
(en)
1976-06-09
Family
ID=23160903
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1926973A
Expired
GB1438538A
(en)
1972-10-25
1973-04-24
Motor speed control
Country Status (6)
Country
Link
JP
(1)
JPS49108518A
(en)
CA
(1)
CA1002111A
(en)
CH
(1)
CH588186A5
(en)
DE
(1)
DE2320023A1
(en)
FR
(1)
FR2204920B1
(en)
GB
(1)
GB1438538A
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US10186932B2
(en)
2013-05-08
2019-01-22
Lenze Drives Gmbh
Drive system
CN116570789A
(en)
*
2023-07-13
2023-08-11
四川天府南格尔生物医学有限公司
Plasma collection system and collection method
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2480044A1
(en)
*
1980-04-02
1981-10-09
Proizv Ob Dinamo
METHOD FOR ADJUSTING THE ROTATION FREQUENCY OF AT LEAST ONE ASYNCHRONOUS MOTOR AND REGULATOR IMPLEMENTING SAID METHOD
JPS56162952A
(en)
*
1980-05-21
1981-12-15
Mayekawa Mfg Co Ltd
Structure of rotor for wound-rotor type induction machine
DE102013208552A1
(en)
*
2013-05-08
2014-11-13
Lenze Drives Gmbh
drive system
Family Cites Families (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3586935A
(en)
*
1969-01-09
1971-06-22
Oscar E Lundelius Sr
Speed regulating and control system for plural-phase-wound-rotor induction motors
1973
1973-04-19
DE
DE2320023A
patent/DE2320023A1/en
not_active
Ceased
1973-04-19
FR
FR7314422A
patent/FR2204920B1/fr
not_active
Expired
1973-04-19
CH
CH571873A
patent/CH588186A5/xx
not_active
IP Right Cessation
1973-04-24
CA
CA169,362A
patent/CA1002111A/en
not_active
Expired
1973-04-24
GB
GB1926973A
patent/GB1438538A/en
not_active
Expired
1973-08-18
JP
JP48092106A
patent/JPS49108518A/ja
active
Pending
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US10186932B2
(en)
2013-05-08
2019-01-22
Lenze Drives Gmbh
Drive system
CN116570789A
(en)
*
2023-07-13
2023-08-11
四川天府南格尔生物医学有限公司
Plasma collection system and collection method
CN116570789B
(en)
*
2023-07-13
2023-10-13
四川天府南格尔生物医学有限公司
Plasma collection system and collection method
Also Published As
Publication number
Publication date
FR2204920B1
(en)
1977-09-16
CA1002111A
(en)
1976-12-21
DE2320023A1
(en)
1974-05-09
JPS49108518A
(en)
1974-10-16
FR2204920A1
(en)
1974-05-24
CH588186A5
(en)
1977-05-31
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Legal Events
Date
Code
Title
Description
1976-10-20
PS
Patent sealed
1982-11-24
PCNP
Patent ceased through non-payment of renewal fee
