JPS57202893A - Brushless dc motor - Google Patents

Brushless dc motor

Info

Publication number
JPS57202893A
JPS57202893A JP56087892A JP8789281A JPS57202893A JP S57202893 A JPS57202893 A JP S57202893A JP 56087892 A JP56087892 A JP 56087892A JP 8789281 A JP8789281 A JP 8789281A JP S57202893 A JPS57202893 A JP S57202893A
Authority
JP
Japan
Prior art keywords
voltage
transistor
current
energization
stopping
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
JP56087892A
Other languages
Japanese (ja)
Inventor
Makoto Goto
Hiroshi Mizuguchi
Shingi Yokobori
Hiroshi Okamoto
Kazuyuki Nakamura
Taiji Waki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56087892A priority Critical patent/JPS57202893A/en
Publication of JPS57202893A publication Critical patent/JPS57202893A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/34—Modelling or simulation for control purposes

Abstract

PURPOSE:To provide a brushless DC motor which can prevent the withstand voltage breakdown and the thermal breakdown of a drive transistor by slowly reducing the timing of a coil supplying current at the time of stopping an energization, thereby reducing a spike-shaped voltage. CONSTITUTION:When a zero voltage signal is applied as a stop signal from VCC to the terminal 48 of an energization stopping circuit 49, a transistor 42 is turned OFF, a capacitor 44 is charged from zero voltage to higher voltage. When the terminal voltage C of the condenser becomes higher than a forward voltage VBE between the base and the emitter, a transistor 46 is activated. As the voltage C rises, the emitter current of the transistor 46 will slowly increase, part of the differential current (i1-i2) corresponding to the command voltage A is absorbed by the transistor 46, thereby gradually decreasing the current to a resistor 13. As a result, the current supplied to a motor coil slowly decreases in time sequence. When the voltage C becomes up to 2VBE, a transistor 47 is conducted, thereby absorbing the current (i1-i2) completely and stopping the energization to the motor coil.
JP56087892A 1981-06-08 1981-06-08 Brushless dc motor Pending JPS57202893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56087892A JPS57202893A (en) 1981-06-08 1981-06-08 Brushless dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56087892A JPS57202893A (en) 1981-06-08 1981-06-08 Brushless dc motor

Publications (1)

Publication Number Publication Date
JPS57202893A true JPS57202893A (en) 1982-12-11

Family

ID=13927529

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56087892A Pending JPS57202893A (en) 1981-06-08 1981-06-08 Brushless dc motor

Country Status (1)

Country Link
JP (1) JPS57202893A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10737798B2 (en) * 2016-09-12 2020-08-11 Ansel Misfeldt Integrated feedback to flight controller

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5012766A (en) * 1973-06-05 1975-02-10
JPS5460411A (en) * 1977-09-28 1979-05-15 Siemens Ag Direct current motor with electronic commutation device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5012766A (en) * 1973-06-05 1975-02-10
JPS5460411A (en) * 1977-09-28 1979-05-15 Siemens Ag Direct current motor with electronic commutation device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10737798B2 (en) * 2016-09-12 2020-08-11 Ansel Misfeldt Integrated feedback to flight controller

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