JPS5527906A - Frequency-voltage convertor - Google Patents

Frequency-voltage convertor

Info

Publication number
JPS5527906A
JPS5527906A JP10006178A JP10006178A JPS5527906A JP S5527906 A JPS5527906 A JP S5527906A JP 10006178 A JP10006178 A JP 10006178A JP 10006178 A JP10006178 A JP 10006178A JP S5527906 A JPS5527906 A JP S5527906A
Authority
JP
Japan
Prior art keywords
fluctuation
rotational speed
convertor
speed
pulses
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
JP10006178A
Other languages
Japanese (ja)
Inventor
Harushige Nakagaki
Shunji Iwasaki
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 JP10006178A priority Critical patent/JPS5527906A/en
Publication of JPS5527906A publication Critical patent/JPS5527906A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE: To reduce gradient flutuation of sawtooth form wave and rotational fluctuation of a player by giving temperature characteristics to a constant-current source and compensating the temperature characteristics of a system in an acoustic player.
CONSTITUTION: By turning on and off a transistor 4 by a driving circuit 6 intermittent torque is let to occur to a rotor magnet 3, the altermate voltage synchronized with the rotational speed generated by a winding coil 7 is converted into pulses by a limiter 8, a generator 9. The pulses are supplied to an f-V convertor 10, control voltage is given in inverse proportion to the speed, the driving circuit 6 is controlled, and speed control is conducted. At this time temperature coefficient is given to the constant current which runs in a transister by a diode 31, resistors 32, 33 in the convertor 10, the temperature coefficient of the rotational speed fluctuation of a motor is corrected, the gradient fluctuation of saw tooth form wave generated in response to the output of a circuit 9 is reduced and the rotational speed of the magnet 3 is stabilized.
COPYRIGHT: (C)1980,JPO&Japio
JP10006178A 1978-08-18 1978-08-18 Frequency-voltage convertor Pending JPS5527906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10006178A JPS5527906A (en) 1978-08-18 1978-08-18 Frequency-voltage convertor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10006178A JPS5527906A (en) 1978-08-18 1978-08-18 Frequency-voltage convertor

Publications (1)

Publication Number Publication Date
JPS5527906A true JPS5527906A (en) 1980-02-28

Family

ID=14263945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10006178A Pending JPS5527906A (en) 1978-08-18 1978-08-18 Frequency-voltage convertor

Country Status (1)

Country Link
JP (1) JPS5527906A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6465370B1 (en) 1998-06-26 2002-10-15 Infineon Technologies Ag Low leakage, low capacitance isolation material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6465370B1 (en) 1998-06-26 2002-10-15 Infineon Technologies Ag Low leakage, low capacitance isolation material

Similar Documents

Publication Publication Date Title
ES462768A1 (en) Means for stabilizing an a-c electric motor drive system
JPS5465322A (en) Motor speed control system
JPS5653591A (en) Main shaft revolution control system
JPS5527906A (en) Frequency-voltage convertor
GB914946A (en) Control system for variable speed electrical motor systems
FI913682A0 (en) FOERFARANDE OCH ANORDNING FOER AOTERSTARTNING AV EN INDUKTIONSMOTOR.
JPS57132789A (en) Speed controlling device for motor
FI834173A0 (en) BOERVAERDESGIVARE FOER REGLERING AV DRIVORGAN
US3955097A (en) Alternator driven by a vehicle engine
JPS573590A (en) Controller for brushless electric motor
JPS6475349A (en) Speed control device for winder
JPS5631389A (en) Controlling device for dc motor
JPS5722393A (en) Controlling device for transistor motor
JPS5635697A (en) Control apparatus for ac motor
JPS54150621A (en) Pulse motor driving circuit
GB807065A (en) Improvements relating to controlling the speed of alternating current electric motors for driving gyroscopes
JPS5546887A (en) Control device for induction motor
ATE122185T1 (en) ROTATIONAL SPEED CONTROL DEVICE FOR AN ELECTRIC MOTOR.
GB1130672A (en) Electric timepiece
SU798747A1 (en) Device for stabilizing electric drive speed
JPS5419111A (en) Controlling motor with shunt field winding
GB907438A (en) A control circuit for the speed regulation of an electric motor
JPS5546874A (en) Thyristor controller
JPS6483852A (en) Torque variation controller for engine
JPS54109116A (en) Controller of non-commutator motor