JPS5497722A - Rotor position detector for commutatorless motor - Google Patents

Rotor position detector for commutatorless motor

Info

Publication number
JPS5497722A
JPS5497722A JP340278A JP340278A JPS5497722A JP S5497722 A JPS5497722 A JP S5497722A JP 340278 A JP340278 A JP 340278A JP 340278 A JP340278 A JP 340278A JP S5497722 A JPS5497722 A JP S5497722A
Authority
JP
Japan
Prior art keywords
low
latch circuit
armature
terminal
signal
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
JP340278A
Other languages
Japanese (ja)
Inventor
Tsunehiro Endo
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 JP340278A priority Critical patent/JPS5497722A/en
Publication of JPS5497722A publication Critical patent/JPS5497722A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To eliminate the phase delay caused by the comparator having hystersis characteristic, by employing a latch circuit for obtaining the position detecting signal from the terminal voltage of armature. CONSTITUTION:Armature terminal voltages VA-VC and armature neutral voltage VN are passed through low pass filter 3 and comparator 9 to form comparsion signals A1-C1 which is provided to latch circuit 10. Comparison signals Al and Bl are provided respectively to set terminal S1 and reset terminal R1 of first latch circuit 11. At predetermined time limit B1 is high while Al is low thereby the output signal A from first latch circuit 11 is low and such state continues for a while after the comparison signal B1 switched to low. When the comparison signal A1 switched from low to high, the output signal A also switches to high.
JP340278A 1978-01-18 1978-01-18 Rotor position detector for commutatorless motor Pending JPS5497722A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP340278A JPS5497722A (en) 1978-01-18 1978-01-18 Rotor position detector for commutatorless motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP340278A JPS5497722A (en) 1978-01-18 1978-01-18 Rotor position detector for commutatorless motor

Publications (1)

Publication Number Publication Date
JPS5497722A true JPS5497722A (en) 1979-08-02

Family

ID=11556373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP340278A Pending JPS5497722A (en) 1978-01-18 1978-01-18 Rotor position detector for commutatorless motor

Country Status (1)

Country Link
JP (1) JPS5497722A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4528486A (en) * 1983-12-29 1985-07-09 The Boeing Company Controller for a brushless DC motor
US4531079A (en) * 1982-05-27 1985-07-23 Papst-Motoren Gmbh & Co. Kg Brushless DC drive motor for signal recording means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531079A (en) * 1982-05-27 1985-07-23 Papst-Motoren Gmbh & Co. Kg Brushless DC drive motor for signal recording means
US4528486A (en) * 1983-12-29 1985-07-09 The Boeing Company Controller for a brushless DC motor

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