GB1081168A - Improvements in and relating to electric motors - Google Patents

Improvements in and relating to electric motors

Info

Publication number
GB1081168A
GB1081168A GB48332/64A GB4833264A GB1081168A GB 1081168 A GB1081168 A GB 1081168A GB 48332/64 A GB48332/64 A GB 48332/64A GB 4833264 A GB4833264 A GB 4833264A GB 1081168 A GB1081168 A GB 1081168A
Authority
GB
United Kingdom
Prior art keywords
coils
high frequency
motor
coil
rotor
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
GB48332/64A
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB1081168A publication Critical patent/GB1081168A/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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/063—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current using centrifugal devices, e.g. switch, resistor
    • 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
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/23—Mechanically-actuated centrifugal switches
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/12—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using detecting coils using the machine windings as detecting coil
    • 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
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/06—Arrangements for speed regulation of a single motor wherein the motor speed is measured and compared with a given physical value so as to adjust the motor speed

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

1,081,168. Electric motors. HITACHI SEISAKUSHO KABUSHIKI KAISHA. Nov. 27, 1964 [Nov. 27, 1963], No. 48332/64. Heading H2A. The speed of a brushless electric motor having a rotor position sensing device operating at high frequency, is controlled by a shaft mounted centrifugal switch which cuts off the high frequency supply to the sensing device when the motor overspeeds. A high frequency oscillator 1 induces a high frequency signal in coil L 4 on the rotor through rotating transformer T 1 and this signal is applied through the centrifugal switch contact G to rotating coils L 5 , the number of such coils depending on the number of poles on the permanent magnet rotor. Detecting coils are spaced around the stator frame, with opposite coils connected in series, and the magnitude and phase of the voltages induced, from coils L 5 , in these coils will be a measure of the instantaneous rotor position. These values are added to a reference signal induced in coil L 3 and after detection are applied to a transistor switching circuit for causing current flow in the motor stator windings L 9 -L 11 in sequence. If the motor overspeeds contact G opens to cut off the high frequency supply to coils L 5 and thereby stop the supply of current to the stator windings so that the motor speed falls until contact G again closes. The opposite direction of rotation may be obtained by reversing the output of reference coil L 3 . Alternatively the switch may operate to short-circuit coil L 4 .
GB48332/64A 1963-11-27 1964-11-27 Improvements in and relating to electric motors Expired GB1081168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6329963 1963-11-27

Publications (1)

Publication Number Publication Date
GB1081168A true GB1081168A (en) 1967-08-31

Family

ID=13225280

Family Applications (1)

Application Number Title Priority Date Filing Date
GB48332/64A Expired GB1081168A (en) 1963-11-27 1964-11-27 Improvements in and relating to electric motors

Country Status (3)

Country Link
DE (1) DE1463906A1 (en)
FR (1) FR1414667A (en)
GB (1) GB1081168A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1292237B (en) * 1966-05-04 1969-04-10 Leitz Ernst Gmbh Brushless motor
DE3345554A1 (en) * 1983-12-16 1985-08-29 Teldix Gmbh, 6900 Heidelberg DC motor without a commutator, for driving an optical deflector

Also Published As

Publication number Publication date
DE1463906A1 (en) 1969-09-04
FR1414667A (en) 1965-10-15

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