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JPS5556496A - Motor speed control device - Google Patents

Motor speed control device

Info

Publication number
JPS5556496A
JPS5556496A JP12914378A JP12914378A JPS5556496A JP S5556496 A JPS5556496 A JP S5556496A JP 12914378 A JP12914378 A JP 12914378A JP 12914378 A JP12914378 A JP 12914378A JP S5556496 A JPS5556496 A JP S5556496A
Authority
JP
Japan
Prior art keywords
speed
motor
resistance element
negative resistance
current
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.)
Granted
Application number
JP12914378A
Other languages
Japanese (ja)
Other versions
JPS5642240B2 (en
Inventor
Mitsuo Nakano
Hiroyuki Mochihara
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.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co 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 Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP12914378A priority Critical patent/JPS5556496A/en
Publication of JPS5556496A publication Critical patent/JPS5556496A/en
Publication of JPS5642240B2 publication Critical patent/JPS5642240B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Multiple Motors (AREA)

Abstract

PURPOSE: To protect a motor from deteriorated service life by eliminating circulation current, the circuitry uses connecting a negative resistance element which undergoes breakover when a given voltage is applied across speed terminals to be connected.
CONSTITUTION: Setting the speed changeover switch 14 to the high-speed contact 141 allows current to flow through the high-speed terminal 12 and the motor 7. This also applies power voltage to the motor 8 causing the negative resistance element 18 to undergo breakover, and, as a result, the current passes through the high- speed terminal 13 to perform high-speed running. If, due to some reason, both motors 7, 8 differ in speed to cause a potential difference between the low-speed terminals 15, 16, the negative resistance element 19 remains in nonconducting condition, thus preventing the flow of circulation current.
COPYRIGHT: (C)1980,JPO&Japio
JP12914378A 1978-10-18 1978-10-18 Motor speed control device Granted JPS5556496A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12914378A JPS5556496A (en) 1978-10-18 1978-10-18 Motor speed control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12914378A JPS5556496A (en) 1978-10-18 1978-10-18 Motor speed control device

Publications (2)

Publication Number Publication Date
JPS5556496A true JPS5556496A (en) 1980-04-25
JPS5642240B2 JPS5642240B2 (en) 1981-10-03

Family

ID=15002178

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12914378A Granted JPS5556496A (en) 1978-10-18 1978-10-18 Motor speed control device

Country Status (1)

Country Link
JP (1) JPS5556496A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60187911U (en) * 1984-05-21 1985-12-12 株式会社　ほくさん Bathtub hot water adjustment device
US11649138B2 (en) * 2020-05-01 2023-05-16 Otis Elevator Company Elevator system monitoring and control based on hoistway wind speed

Also Published As

Publication number Publication date
JPS5642240B2 (en) 1981-10-03

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