JPS62247784A - Speed control circuit for motor - Google Patents

Speed control circuit for motor

Info

Publication number
JPS62247784A
JPS62247784A JP61091490A JP9149086A JPS62247784A JP S62247784 A JPS62247784 A JP S62247784A JP 61091490 A JP61091490 A JP 61091490A JP 9149086 A JP9149086 A JP 9149086A JP S62247784 A JPS62247784 A JP S62247784A
Authority
JP
Japan
Prior art keywords
sample
speed
serrate
circuit
wave
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
JP61091490A
Inventor
Toshiharu Ohashi
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP61091490A priority Critical patent/JPS62247784A/en
Publication of JPS62247784A publication Critical patent/JPS62247784A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To widen a speed control range by altering a frequency of output signal of a speed-detecting circuit or timing-pulse generation circuit.
CONSTITUTION: A speed signal proportional to a motor rotating speed is outputted from any of frequency generator FG1 or FG2 selected by a changeover switch SW. A sample reset pulse generation circuit 2 generates a sample pulse and a reset pulse simultaneously with a speed signal and a serrate-wave genera tion circuit 3 generates a serrate-wave voltage simultaneously with a reset pulse. A sample-and-hold circuit 4 samples a serrate-wave voltage by a sample pulse. A comparator 13 compares an error signal of a sample-and-hold voltage and a rotating-speed setting voltage with a reference triangular wave to give a comparison signal to FET 14.
COPYRIGHT: (C)1987,JPO&Japio
JP61091490A 1986-04-21 1986-04-21 Speed control circuit for motor Pending JPS62247784A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61091490A JPS62247784A (en) 1986-04-21 1986-04-21 Speed control circuit for motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61091490A JPS62247784A (en) 1986-04-21 1986-04-21 Speed control circuit for motor

Publications (1)

Publication Number Publication Date
JPS62247784A true JPS62247784A (en) 1987-10-28

Family

ID=14027858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61091490A Pending JPS62247784A (en) 1986-04-21 1986-04-21 Speed control circuit for motor

Country Status (1)

Country Link
JP (1) JPS62247784A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06297298A (en) * 1984-03-23 1994-10-25 Black & Decker Inc Method for detecting kickback condition and power tool controlled by the method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06297298A (en) * 1984-03-23 1994-10-25 Black & Decker Inc Method for detecting kickback condition and power tool controlled by the method

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