JPS5497723A - Rotor position detector for commutatorless motor - Google Patents

Rotor position detector for commutatorless motor

Info

Publication number
JPS5497723A
JPS5497723A JP340478A JP340478A JPS5497723A JP S5497723 A JPS5497723 A JP S5497723A JP 340478 A JP340478 A JP 340478A JP 340478 A JP340478 A JP 340478A JP S5497723 A JPS5497723 A JP S5497723A
Authority
JP
Japan
Prior art keywords
detection signals
positional detection
type
positional
generating circuit
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
JP340478A
Other languages
Japanese (ja)
Inventor
Tsunehiro Tatsutou
Kenichi Iizuka
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 JP340478A priority Critical patent/JPS5497723A/en
Publication of JPS5497723A publication Critical patent/JPS5497723A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To perform accurate positional detection not associated with phase delay, by using the fact that the multiple pulse isn't generated at the falling section of the positional detecting signal pulse. CONSTITUTION:The positional detection signals VA-VC are provided to low pass filter 5, bypass filter 6, comparator 10, logic 12, three times frequency generating circuit 13 and phase locked loop(PLL) 14. The output signal 17 from the voltage control generating circuit 17 is provided to each D-type flipflop 15-1-15-2 as clock signal while the positional detection signals A-C are provided to D-type input terminals D1-D3 of D-type flipflops 15-1-15-3, and the information of D input is transmitted to the output at the falling time point of the clock signal. Consequently the outputs from D-type flipflops 15-1-15-3 have 60 deg. phase difference against the positional detection signals A-C to provide the positional detection signals A<+>-C<+> for the thyristor in the plus sid arm.
JP340478A 1978-01-18 1978-01-18 Rotor position detector for commutatorless motor Pending JPS5497723A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP340478A JPS5497723A (en) 1978-01-18 1978-01-18 Rotor position detector for commutatorless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP340478A JPS5497723A (en) 1978-01-18 1978-01-18 Rotor position detector for commutatorless motor

Publications (1)

Publication Number Publication Date
JPS5497723A true JPS5497723A (en) 1979-08-02

Family

ID=11556433

Family Applications (1)

Application Number Title Priority Date Filing Date
JP340478A Pending JPS5497723A (en) 1978-01-18 1978-01-18 Rotor position detector for commutatorless motor

Country Status (1)

Country Link
JP (1) JPS5497723A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985001371A1 (en) * 1983-09-22 1985-03-28 Canon Kabushiki Kaisha File system
JPS62285686A (en) * 1986-05-30 1987-12-11 Sony Corp Brushless motor
US4978895A (en) * 1988-10-17 1990-12-18 Schwarz Marcos G Electronic control circuit for brushless direct current motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985001371A1 (en) * 1983-09-22 1985-03-28 Canon Kabushiki Kaisha File system
US4996664A (en) * 1983-09-22 1991-02-26 Canon Kabushiki Kaisha File system
JPS62285686A (en) * 1986-05-30 1987-12-11 Sony Corp Brushless motor
US4978895A (en) * 1988-10-17 1990-12-18 Schwarz Marcos G Electronic control circuit for brushless direct current motor

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