JPS561799A - Circuit for sensing rotation of electronic clock motor - Google Patents

Circuit for sensing rotation of electronic clock motor

Info

Publication number
JPS561799A
JPS561799A JP7722379A JP7722379A JPS561799A JP S561799 A JPS561799 A JP S561799A JP 7722379 A JP7722379 A JP 7722379A JP 7722379 A JP7722379 A JP 7722379A JP S561799 A JPS561799 A JP S561799A
Authority
JP
Japan
Prior art keywords
circuit
conducted
current
induced voltage
sensing
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
JP7722379A
Other languages
Japanese (ja)
Other versions
JPS5756320B2 (en
Inventor
Akira Torisawa
Jun Ueda
Masaharu Shida
Masaaki Bandai
Shiyuuji Ootawa
Katsuhiko Sato
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP7722379A priority Critical patent/JPS561799A/en
Publication of JPS561799A publication Critical patent/JPS561799A/en
Publication of JPS5756320B2 publication Critical patent/JPS5756320B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

PURPOSE:To sense the rotation at low power by connecting a diode in parallel with one of driving transistors connected in series and connecting the seris circuit of a resistor and a switching element to one of the driving transistors in a bridge-type step- motor driving circuit for clocks. CONSTITUTION:A current with a small pulse width is conducted through A an MOS transistor 11 a coil 20 an MOS transistor 12 and D for driving a motor at low power. At the same time the pulse is stopped, a switching transistor 15 is turned on, and at first the current is conducted in the direction of an arrow in a loop l1. The braking force for a rotor is weak because of a higher resistance value 19. When the polarity of the induced voltage is reversed, the current is conducted through a loop l2, and the braking force which is stronger than that at the low impedance is applied. Depending on the difference in times at which the braking forces are applied, the difference between the induced voltage when one-step turn is made and the induced voltage when one-step tuen is not made, can be sensed. In this case, sensing is made at a C terminal. In the remaining half turn, sensing is made at a B terminal.
JP7722379A 1979-06-19 1979-06-19 Circuit for sensing rotation of electronic clock motor Granted JPS561799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7722379A JPS561799A (en) 1979-06-19 1979-06-19 Circuit for sensing rotation of electronic clock motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7722379A JPS561799A (en) 1979-06-19 1979-06-19 Circuit for sensing rotation of electronic clock motor

Publications (2)

Publication Number Publication Date
JPS561799A true JPS561799A (en) 1981-01-09
JPS5756320B2 JPS5756320B2 (en) 1982-11-29

Family

ID=13627844

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7722379A Granted JPS561799A (en) 1979-06-19 1979-06-19 Circuit for sensing rotation of electronic clock motor

Country Status (1)

Country Link
JP (1) JPS561799A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH665084GA3 (en) * 1986-06-26 1988-04-29
DE10222538A1 (en) * 2002-05-17 2003-11-27 Siemens Ag Process for an actuator drive has electric motor in a square operating system having an H bridge circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH665084GA3 (en) * 1986-06-26 1988-04-29
US4754210A (en) * 1986-06-26 1988-06-28 Asulab Sa Method of and a device for controlling a stepping motor
DE10222538A1 (en) * 2002-05-17 2003-11-27 Siemens Ag Process for an actuator drive has electric motor in a square operating system having an H bridge circuit
DE10222538B4 (en) * 2002-05-17 2013-12-24 Continental Automotive Gmbh Method for operating an actuator

Also Published As

Publication number Publication date
JPS5756320B2 (en) 1982-11-29

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