JPS5612836A - Rotational frequency detector for squirrel-cage induction motor - Google Patents

Rotational frequency detector for squirrel-cage induction motor

Info

Publication number
JPS5612836A
JPS5612836A JP8728979A JP8728979A JPS5612836A JP S5612836 A JPS5612836 A JP S5612836A JP 8728979 A JP8728979 A JP 8728979A JP 8728979 A JP8728979 A JP 8728979A JP S5612836 A JPS5612836 A JP S5612836A
Authority
JP
Japan
Prior art keywords
current
rotational frequency
end ring
magnetic flux
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.)
Pending
Application number
JP8728979A
Other languages
Japanese (ja)
Inventor
Yoshihiko Yanagiuchi
Hiroshi Aida
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8728979A priority Critical patent/JPS5612836A/en
Publication of JPS5612836A publication Critical patent/JPS5612836A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H02K11/225—Detecting coils
    • 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
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Induction Machinery (AREA)

Abstract

PURPOSE:To detect rotational frequency at a low cost, by using a magnetic current converter such as a search coil or a Hall element to detect magnetic flux due to a current flowing through the end ring of a rotor. CONSTITUTION:Since a secondary current flows in a rotor bar 1 and is short-circuited by an end ring 2, the direction of the current in the end ring is vertical. Magnetic flux due to the current in the end ring extends as shown by dotted lines 5 in the figure. A magnetic current converter 6 such as a search coil or a Hall element is placed perpendicularly to the magnetic flux 5. The current flowing in the end ring varies depending on rotational frequency and the magnetic flux 5 varies depending on the current. As a result, a voltage induced across the output terminals 7, 8 of the converter 6 changes depending on the rotation of a rotor so that the rotational frequency of an electric motor can be detected. The rotational frequency dependent on the powr supplied state and loaded state of the motor can be detected from the output signal across the terminals 7, 8.
JP8728979A 1979-07-10 1979-07-10 Rotational frequency detector for squirrel-cage induction motor Pending JPS5612836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8728979A JPS5612836A (en) 1979-07-10 1979-07-10 Rotational frequency detector for squirrel-cage induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8728979A JPS5612836A (en) 1979-07-10 1979-07-10 Rotational frequency detector for squirrel-cage induction motor

Publications (1)

Publication Number Publication Date
JPS5612836A true JPS5612836A (en) 1981-02-07

Family

ID=13910634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8728979A Pending JPS5612836A (en) 1979-07-10 1979-07-10 Rotational frequency detector for squirrel-cage induction motor

Country Status (1)

Country Link
JP (1) JPS5612836A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113258727A (en) * 2021-06-01 2021-08-13 广东威灵电机制造有限公司 Motor and household appliance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113258727A (en) * 2021-06-01 2021-08-13 广东威灵电机制造有限公司 Motor and household appliance
CN113258727B (en) * 2021-06-01 2022-05-03 广东威灵电机制造有限公司 Motor and household appliance

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