JPS558262A - Motor speed controller - Google Patents

Motor speed controller

Info

Publication number
JPS558262A
JPS558262A JP8098178A JP8098178A JPS558262A JP S558262 A JPS558262 A JP S558262A JP 8098178 A JP8098178 A JP 8098178A JP 8098178 A JP8098178 A JP 8098178A JP S558262 A JPS558262 A JP S558262A
Authority
JP
Japan
Prior art keywords
resistor
bridge
drive coil
motor
transistors
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
JP8098178A
Other languages
Japanese (ja)
Inventor
Tadashi Takahashi
Shigeki Morinaga
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
Priority to JP8098178A priority Critical patent/JPS558262A/en
Publication of JPS558262A publication Critical patent/JPS558262A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

PURPOSE: To produce highly accurate speed electromotive force from a motor in a simple construction by constructing a resistor bridge with a drive coil disposed at one side and controlling the current amount of the drive coil via the detected voltage produced from the detecting terminal of the bridge.
CONSTITUTION: The other end of a drive coil 11a is connected to a resistor R1 to form a resistor bridge 14 with other resistors R2, R3 and a coil 11 disposed at one side. The detecting terminals A. B of the bridge are connected through resistors 15, 16 to an amplifier 17. The output terminal of the amplifier 17 is connected through a smoothing circuit 22 consisting of a resistor R and a capacitor C to the bases of control transistors 23a, 23b, 23c. The emitters of the transistors 23a∼23c are grounded, and the collectors thereof are connected to the bases of transistors 13a∼ 13c. Thus, speed electromotive force can be detected in repsonse to the rotating speed of the motor from the drive coil always energized to thereby control the speed of the motor in high accuracy.
COPYRIGHT: (C)1980,JPO&Japio
JP8098178A 1978-07-05 1978-07-05 Motor speed controller Pending JPS558262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8098178A JPS558262A (en) 1978-07-05 1978-07-05 Motor speed controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8098178A JPS558262A (en) 1978-07-05 1978-07-05 Motor speed controller

Publications (1)

Publication Number Publication Date
JPS558262A true JPS558262A (en) 1980-01-21

Family

ID=13733672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8098178A Pending JPS558262A (en) 1978-07-05 1978-07-05 Motor speed controller

Country Status (1)

Country Link
JP (1) JPS558262A (en)

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