WO2005101644A1 - モータ駆動装置 - Google Patents
モータ駆動装置 Download PDFInfo
- Publication number
- WO2005101644A1 WO2005101644A1 PCT/JP2005/006993 JP2005006993W WO2005101644A1 WO 2005101644 A1 WO2005101644 A1 WO 2005101644A1 JP 2005006993 W JP2005006993 W JP 2005006993W WO 2005101644 A1 WO2005101644 A1 WO 2005101644A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- motor
- circuit
- current
- capacitor
- charge
- Prior art date
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
- H02P6/12—Monitoring commutation; Providing indication of commutation failure
Definitions
- the present invention relates to a motor drive device that rotationally drives a motor such as a fan motor provided in a computer, an exchange, a printer, and the like, and particularly to a motor drive device having a motor lock detection circuit.
- FIG. 4 is a diagram showing an outline of a motor drive device provided with a conventional motor lock detection circuit.
- a motor 1 is a two-phase motor that rotates a fan.
- the resistor 2a, the Hall element 2, and the resistor 2b are connected in series between the power supply voltage Vdd and the ground.
- the rotation state of motor 1 is detected by Hall element 2.
- the semiconductor integrated circuit (hereinafter, I C) 100 receives the output signal of the Hall element 2 and drives the drive transistors 9 a and 9 b.
- the first-stage amplifier 3 amplifies the output of the Hall element 2 and outputs it as a rotation signal A.
- the middle amplifier 4 further amplifies the rotation signal A and supplies it to the control circuit 5.
- the control circuit 5 generates a two-phase drive signal based on a signal from the middle amplifier 4 and a reference signal. This drive signal is supplied to the drive transistors 9a and 9b.
- 8 is a diode.
- the motor 1 Since these form a feedback loop, the motor 1 is driven in two-phase half-waves according to the rotation signal A corresponding to the rotation state. Then, in the steady state, the motor 1 continues to rotate at a substantially constant speed determined according to the characteristics of the feedback loop.
- the value of the rotation signal A does not change, and the output state of the control circuit 5 is also fixed. That is, the control circuit 5 supplies the motor 1 continuously or not at all. If power is continuously supplied while the motor 1 is not rotating, excessive current will flow, and the motor 1 may overheat and eventually break down. On the other hand, if power is not supplied to the motor 1 at all, even if the obstacle is removed and the motor 1 returns to the rotatable state, it cannot return to the rotating state. Either way is inconvenient.
- this motor drive device is provided with an automatic return signal generation circuit 6 and a capacitor 7 which perform so-called lock detection and automatic return functions.
- the capacitor 7 cooperates with the automatic return signal generation circuit 6, but is externally connected to the IC 100 because of its large capacitance. When the capacitance of the capacitor 7 is small, it is built in the IC 100 and included in the automatic return signal generation circuit 6.
- first-stage amplifier 3, middle-stage amplifier 4, control circuit 5, and automatic return signal generation circuit 6 are built in IC100, and are provided with Hall signal pins Pl and P2 and capacitor Pin P 3 and drive signal pins P 4 and P 5 are connected to external elements via each.
- the automatic return signal generation circuit 6 monitors the rotation state of the motor 1 by inputting the rotation signal A. When it is detected that the rotation of motor 1 has stopped, an automatic return signal E is generated until motor 1 returns to the rotating state.
- the automatic return signal E is a signal that repeats an ON state value and an OFF state value for each predetermined time determined by the automatic return signal generation circuit 6 and the capacitor 7 in order.
- this signal is used for control by the control circuit 5 instead of the control signal from the amplifier 4.
- the motor is repeatedly started, for example, about every 0.5 seconds with a pause of about 3 seconds interposed therebetween.
- the motor 1 can be rotated without being damaged by the drive.
- the rotation state can be restored as soon as possible.
- the appropriate values for the motor start-up trial period and pause period are determined according to the motor characteristics.
- FIG. 5 shows a specific example of the conventional automatic return signal generation circuit 6.
- the capacitor 7 has a capacitance of, for example, 1 F, and generates a charge / discharge voltage signal C that is charged and discharged to form a sawtooth wave or a triangular wave.
- the first constant current circuit 63 supplies a charging current I c 1 of, for example, 3 ⁇ A to the capacitor 7.
- the second constant current circuit 64 discharges, for example, 3.5 ° discharge current Id from the capacitor 7.
- the comparison circuit 65 with the hysteresis characteristic is configured such that when the input charging / discharging voltage signal C exceeds the operating threshold value, for example, about 2.5 V, the comparison output D becomes “H (high level)” and the reset threshold value, for example, about 1 When the voltage falls below V, the comparison output D becomes "L (low level)”.
- the second switch circuit SW2 conducts or interrupts the discharge current from the second constant current circuit 64 according to the comparison output D. These constitute an oscillation circuit.
- the charge / discharge voltage signal C obtained as an oscillation signal is an asymmetric triangular wave that rises in about 0.5 seconds and falls in about 3 seconds.
- the pulse generation circuit 61 receives the rotation signal A and generates a pulse signal B having the same cycle as the rotation signal A.
- the first switch SW 1 receives the pulse signal B, the first switch SW 1 instantaneously discharges the charge stored in the capacitor 7.
- the rotation signal A does not change, the pulse signal B does not output, and the above-described oscillation circuit independently performs the above-described oscillation.
- the charge / discharge voltage signal C rises in about 0.5 seconds and falls in about 3 seconds.
- the comparison output D of the comparison circuit 65 also has a pulse waveform of the same cycle.
- the waveform shaping circuit 66 shapes the waveform of the charge / discharge voltage signal C and outputs an automatic return signal E as a pulse signal.
- This automatic return signal E has “H” during the motor start-up trial period (about 0.5 seconds) and “L” during the pause period (about 3 seconds). This automatic return signal E is repeatedly output after the detection of the rotation stop of the motor 1 until the motor 1 returns to the rotating state. The generation of such an automatic return signal E performs a so-called automatic return function.
- the motor start-up trial period (for example, about 0.5 seconds) and the rest period (for example, about 3 seconds) depend on the characteristics of the motor 1.
- the motor start-up trial period, pause period, and the ratio are set to values that are optimal for the motor 1 to be applied. Therefore, there is a problem in that an IC 100 including the automatic return signal generation circuit 6 must be prepared for each type of motor to be applied.
- the current values of the first and second constant current circuits 63, 64 of the automatic return signal generation circuit 6, etc. By making the variable, it is possible to change the motor start-up trial period, the pause period, and the ratio thereof, but this will increase the cost of IC100.
- the present invention makes it possible to apply an IC including an automatic return signal generation circuit and the like for detecting that the motor is locked and automatically returning the same to a plurality of types of motors having different characteristics, and to perform a motor start-up trial period.
- a motor drive device provided with a motor lock detection circuit capable of individually adjusting a ratio between a motor start-up trial period and a pause period for a plurality of types of motors having different characteristics.
- the motor drive device of the present invention generates a motor drive signal for rotating the motor while the motor is rotating, and when the motor is stopped (hereinafter referred to as motor lock) when the motor stops in the drive state.
- motor lock a motor drive signal for rotating the motor while the motor is rotating, and when the motor is stopped (hereinafter referred to as motor lock) when the motor stops in the drive state.
- a capacitor that is charged or discharged to generate a voltage signal corresponding to the charge, a hysteresis type comparison circuit that detects that the voltage signal has reached a predetermined threshold, and generates a comparison output;
- a first charging circuit for charging the capacitor with a first charging current when a driving current of the motor becomes equal to or greater than a predetermined value
- a first discharge circuit that discharges electric charge from the capacitor with a first discharge current based on the comparison output
- the motor drive device of the present invention generates a motor drive signal for rotating the motor while the motor is rotating, and when the motor is stopped (hereinafter referred to as “motor lock”) when the motor stops in the drive state. After the motor lock is detected, the motor In a motor drive device that repeats a pause period for stopping a drive signal and a motor start-up trial period for generating a motor drive signal,
- a capacitor that is charged or discharged to generate a voltage signal corresponding to the charge, a hysteresis type comparison circuit that detects that the voltage signal has reached a predetermined threshold, and generates a comparison output;
- the capacitor is charged with the second charging current, and during the rotation of the motor, the charge of the capacitor is discharged at a cycle corresponding to the rotation of the motor, and is charged and discharged within a voltage range that does not reach the predetermined threshold.
- a first charge / discharge circuit
- a first charging circuit for charging the capacitor with a first charging current when a driving current of the motor becomes equal to or greater than a predetermined value
- a first discharge circuit that discharges the charge of the capacitor with a first discharge current based on the comparison output
- the detection of the motor lock is performed by the comparison output being generated in the driving state of the motor.
- the first charging circuit includes a voltage drop circuit that generates a voltage drop corresponding to the drive current of the motor, a switch circuit that is switched by a voltage corresponding to the voltage drop, and a serial connection with the switch circuit. And a current adjusting circuit for adjusting the first charging current.
- the voltage drop circuit has a resistor
- the switch circuit has a transistor
- the current adjustment circuit has a resistor
- the first charging circuit includes a voltage drop circuit that generates a voltage drop according to the drive current of the motor, and a constant current circuit that is switched by a voltage corresponding to the voltage drop and flows the first charging current.
- the first discharge circuit has a constant current circuit for flowing the first discharge current. ing.
- At least the comparison circuit and the first discharging circuit are built into one semiconductor integrated circuit (hereinafter, IC), and the capacitor and the first charging circuit are provided outside the IC. It is characterized by.
- the comparison circuit, the first charge / discharge circuit, and the first discharge circuit are built into one semiconductor integrated circuit (hereinafter, I c), and the capacitor and the first charge circuit are connected to the I / O circuit. It is characterized by being provided outside of c.
- the motor lock is detected by utilizing the fact that the drive current of the motor is larger than during rotation when the motor is locked. Then, the capacitor that generates the voltage signal when the motor is locked is charged with a charge current that can be arbitrarily adjusted. Therefore, the first discharge circuit that discharges the capacitor charge with a predetermined discharge current, the hysteresis type comparison circuit that generates a comparison output, and the charge and discharge of the capacitor within a voltage range lower than a predetermined threshold value of the comparison circuit
- the first charge / discharge circuit, etc. is built into the IC to form a general-purpose IC.
- a motor driving device is configured using the general-purpose IC, an external capacitor, a first charging circuit, and the like. The motor driving device of the present invention can adjust the charging current according to the motor to which the motor is applied.
- FIG. 1 is a diagram showing a configuration of a motor drive device according to a first embodiment of the present invention.
- FIG. 2 is a timing chart for explaining the operation of FIG.
- FIG. 3 is a diagram illustrating a configuration of a motor drive device according to a second embodiment of the present invention.
- FIG. 4 is a diagram showing an outline of a motor drive device provided with a conventional motor lock detection circuit.
- FIG. 5 is a diagram showing a specific example of the automatic return signal generation circuit in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a diagram showing a configuration of a motor drive device according to a first embodiment of the present invention.
- FIG. 2 is a timing chart for explaining the operation of FIG.
- FIG. 1 the same components as those in FIGS. 4 and 5 described in the conventional example are denoted by the same reference numerals, and the description thereof will not be repeated.
- IC 100 A includes the internal configuration of the automatic return signal generation circuit 6. This IC 100 A differs from FIG. 5 in that the comparison output D of the comparison circuit 65 is used as a switching signal of the second switch SW 2 and also as an automatic return signal E. As a result, the pause period during which the automatic recovery signal E is at the "H level" is equal to the capacitor discharge period, so that the pause period can be set accurately.
- a resistor (resistance value R d) 21 that generates a voltage drop according to the drive current of the motor is provided in the path where the motor drive current Im flows. I have.
- This resistor 21 functions as a voltage drop circuit.
- Any circuit may be used as long as it generates a voltage drop proportional to the motor drive current Im.
- a circuit using the ON resistance of a MOS transistor may be used.
- a PNP transistor 22 as a switch circuit and a resistor 23 as a current adjustment circuit are connected in series to a second charging path of the capacitor 7.
- a voltage drop ImXRd of the resistor 21 is applied between the emitter and the base.
- the motor drive current Im becomes much larger than the normal load current.
- the resistance value of the resistor 21 and the operation threshold Vbe of the PNP transistor 22 are determined so that the PNP transistor 22 is turned on by the voltage drop due to the drive current flowing when the motor is locked.
- the resistor 23 and the capacitor 7 are connected between the power supply voltage Vdd and the ground via the PNP transistor 22. Then, when the PNP transistor 22 is turned on, the charging current I c 2 mainly determined by the resistance value of the resistor 23 flows into the capacitor 7.
- resistors 21, the PNP transistor 22, and the resistor 23 form a first charging circuit that allows the charging current I c 2 to flow when the motor is locked.
- This resistor 23 has a required resistance value such that the motor start-up trial period and the ratio between the motor start-up trial period and the pause period are set to an appropriate state according to the type and characteristics of the motor 1 to be driven. It is adjusted to.
- a constant current circuit which is switched by a voltage corresponding to a voltage drop and flows a required constant current can be used.
- the charging current I c 2 can be set more accurately.
- the charge current (Ic1 + Ic) obtained by combining the charge current Ic1 and the charge current Ic2. 2) is adjusted to a current value such that a predetermined motor start-up trial period can be obtained in consideration of the threshold value of the comparison circuit 65. Further, the discharge current Id is set to a value larger than the charge current Ic1 (Id> Ic1). The magnitude of this is adjusted according to the length of the downtime.
- a waveform shaping circuit that inputs a charge / discharge voltage signal C (charge voltage V c), shapes the waveform, and outputs an automatic return signal E as a pulse signal, similarly to the conventional one, is used as the automatic return signal E 6. May be obtained by
- the motor 1 can be used as a driving device for a single-phase motor or a three-phase motor.
- FIG. 1 The operation of FIG. 1 will be described with reference to the timing chart of FIG.
- the motor 1 continues to rotate at a substantially constant speed determined by the characteristics of the feedback loop, and receives the rotation signal A from the Hall element 2, and the pulse generation circuit 61 outputs the pulse signal B .
- the capacitor 7 is charged by the charging current Ic1 from the first constant current circuit 63.
- the first switch SW1 is turned on in accordance with the motor rotation cycle by the pulse signal B. Each time, the charge of the capacitor 7 is reduced. Discharged. Therefore, the charge / discharge voltage signal C stays at a low level and does not reach the threshold value of the comparison circuit 65. In this state, the charging current I c 2 does not flow.
- the motor drive current Im increases due to the motor lock, and the PNP transistor 22 is turned on in response to the voltage drop at the resistor 21. Therefore, since the charging current Ic2 flows through the resistor 21, the capacitor 7 is charged by the combined current Ic1 + Ic2 of the charging current Ic2 and the charging current Ic1.
- the second switch SW 2 When the comparison output D becomes H level, the second switch SW 2 is turned on, and the charge of the capacitor 7 is discharged. The discharge of the charge is due to the difference between the discharge current Id and the charge current Ic1. Therefore, the quiescent period T off (t 2 ⁇ t 3) until the time t 3 at which the charging voltage V c of the capacitor 7 falls to the return threshold of the comparison circuit 65 is determined with high accuracy.
- the comparison output D and the automatic return signal E are again at the L level, so that the second switch SW2 is turned off and the control operation of the control circuit 5 is turned on.
- the motor start trial period T on enters, and the motor drive current Im flows.
- the capacitor 7 is charged again from the time point t3 by the combined current of the charging current Ic1 and the charging current Ic2.
- the charging voltage Vc reaches the operation threshold value of the comparison circuit 65 at time t4.
- This motor start-up trial period T on (t 3 ⁇ t 4) differs depending on the resistance value of the resistor 23. Therefore, the resistance values of the resistors 23 are adjusted according to the type of the motor 1 to be driven. This makes it possible to optimize the motor start-up trial period T ori and the ratio of the motor start-up trial period T on to the pause period T off according to the type of motor. You can.
- the resistor 23 is an external resistor of IC10OA, it can be replaced with any resistor as necessary. Therefore, a single IC 100 A can be used for a plurality of types of motors 1.
- the motor 1 returns to the normal rotation operation. For example, as shown in Fig. 2, when the motor lock is released at the time t5 during the pause Toff, the normal operation is performed at the time t6 after the pause Toff ends. Return to. If the motor is released during the motor start-up trial period T on, normal operation resumes when the motor is released.
- the voltage drop circuit (resistance) 21 and the switch circuit (PNP transistor) 22 are used. Use to detect motor lock. Then, the capacitor 7 that generates the voltage signal C (charging voltage V c) is charged with the current adjusted by the current adjusting circuit (resistance) 23. Therefore, the first discharge circuit that discharges the charge of the capacitor 7 with the predetermined discharge current Id, the hysteresis type comparison circuit 65 that generates the comparison output D, and the voltage range lower than the predetermined operation threshold of the comparison circuit 65.
- the motor drive device Even if the first charge / discharge circuit (pulse generation circuit 61, first constant current circuit 63, first switch SW1) etc. that charges and discharges the charge of the capacitor 7 is built in IC10OA, the motor drive device The charging current can be adjusted according to the motor 1 to be applied.
- FIG. 3 is a diagram illustrating a configuration of a motor drive device according to a second embodiment of the present invention. 3 differs from the first embodiment of FIG. 1 in that the first charge / discharge circuit of FIG. 1 is provided, that is, a pulse generation circuit 61, a first constant current circuit 63, and a first switch SW1 are provided. It is not. Because of this difference, IC 100 B is shown in FIG. In the second embodiment of FIG. 3, the charging of the capacitor 7 is performed only by the charging current Ic2.
- the length of the motor start-up trial period T on is not related to the charging current I c 1 but is determined only by the charging current I c 2. It is easy to select a motor that matches the type. In addition, the same effects as in the first embodiment of FIG. 1 can be obtained.
- the motor drive device can be widely applied to a device that detects a locked state of a fan motor or the like provided in a computer, an exchange, a printer, or the like, and that automatically returns.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Control Of Direct Current Motors (AREA)
- Protection Of Generators And Motors (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006512322A JP4651616B2 (ja) | 2004-04-15 | 2005-04-05 | モータ駆動装置 |
US10/599,114 US7408318B2 (en) | 2004-04-15 | 2005-04-05 | Motor drive unit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004120474 | 2004-04-15 | ||
JP2004-120474 | 2004-04-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005101644A1 true WO2005101644A1 (ja) | 2005-10-27 |
Family
ID=35150305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/006993 WO2005101644A1 (ja) | 2004-04-15 | 2005-04-05 | モータ駆動装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7408318B2 (ja) |
JP (1) | JP4651616B2 (ja) |
KR (1) | KR20070003869A (ja) |
CN (1) | CN100409559C (ja) |
TW (1) | TWI345366B (ja) |
WO (1) | WO2005101644A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021096674A (ja) * | 2019-12-18 | 2021-06-24 | ミツミ電機株式会社 | レギュレータ用半導体集積回路およびファンモータシステム |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8120570B2 (en) * | 2004-12-02 | 2012-02-21 | Sharp Laboratories Of America, Inc. | Systems and methods for tone curve generation, selection and application |
CN100581045C (zh) * | 2007-03-15 | 2010-01-13 | 普诚科技股份有限公司 | 控制电路 |
TWM318844U (en) * | 2007-03-30 | 2007-09-11 | Princeton Technology Corp | Device for driving a single phase motor |
JP5470697B2 (ja) * | 2007-06-20 | 2014-04-16 | 株式会社ジェイテクト | 電動パワーステアリング装置 |
JP5151465B2 (ja) * | 2007-12-26 | 2013-02-27 | ミツミ電機株式会社 | ロック検出回路 |
CN102594234B (zh) * | 2012-03-16 | 2015-02-18 | 大连连顺电子有限公司 | 可调速的单相无刷直流风扇驱动集成电路 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07131995A (ja) * | 1993-11-01 | 1995-05-19 | Rohm Co Ltd | モータ駆動装置 |
JPH0951189A (ja) * | 1995-05-31 | 1997-02-18 | Sanyo Denki Co Ltd | 電子部品冷却装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2939833B2 (ja) * | 1991-01-25 | 1999-08-25 | 芝浦メカトロニクス株式会社 | モータのロック検知回路 |
CN1073757C (zh) * | 1998-05-14 | 2001-10-24 | 谢新茂 | 直流无刷风扇检知电路 |
CN1464633A (zh) * | 2002-06-06 | 2003-12-31 | 乐金电子(天津)电器有限公司 | 无刷直流电机的启动时间控制方法 |
US7193404B2 (en) * | 2004-11-24 | 2007-03-20 | Lutron Electronics Co., Ltd. | Load control circuit and method for achieving reduced acoustic noise |
-
2005
- 2005-04-05 JP JP2006512322A patent/JP4651616B2/ja not_active Expired - Fee Related
- 2005-04-05 WO PCT/JP2005/006993 patent/WO2005101644A1/ja active Application Filing
- 2005-04-05 CN CNB200580007230XA patent/CN100409559C/zh not_active Expired - Fee Related
- 2005-04-05 KR KR1020067016932A patent/KR20070003869A/ko not_active Application Discontinuation
- 2005-04-05 US US10/599,114 patent/US7408318B2/en not_active Expired - Fee Related
- 2005-04-12 TW TW094111455A patent/TWI345366B/zh not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07131995A (ja) * | 1993-11-01 | 1995-05-19 | Rohm Co Ltd | モータ駆動装置 |
JPH0951189A (ja) * | 1995-05-31 | 1997-02-18 | Sanyo Denki Co Ltd | 電子部品冷却装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021096674A (ja) * | 2019-12-18 | 2021-06-24 | ミツミ電機株式会社 | レギュレータ用半導体集積回路およびファンモータシステム |
JP7352086B2 (ja) | 2019-12-18 | 2023-09-28 | ミツミ電機株式会社 | レギュレータ用半導体集積回路およびファンモータシステム |
Also Published As
Publication number | Publication date |
---|---|
TWI345366B (en) | 2011-07-11 |
TW200534572A (en) | 2005-10-16 |
JPWO2005101644A1 (ja) | 2008-03-06 |
US20070171584A1 (en) | 2007-07-26 |
KR20070003869A (ko) | 2007-01-05 |
US7408318B2 (en) | 2008-08-05 |
JP4651616B2 (ja) | 2011-03-16 |
CN100409559C (zh) | 2008-08-06 |
CN1930770A (zh) | 2007-03-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3572292B2 (ja) | スイッチング電源回路 | |
US5933573A (en) | Method of controlling an electric motor and apparatus for carrying out the method | |
WO2005101644A1 (ja) | モータ駆動装置 | |
US7218496B2 (en) | Overcurrent protection circuit | |
JP3748262B2 (ja) | スイッチング型直流−直流コンバータ | |
JP3963794B2 (ja) | Dc/dcコンバータ | |
JP4688693B2 (ja) | 電力供給制御装置 | |
US7119526B2 (en) | Processor based integrated circuit with a supply voltage monitor using bandgap device without feedback | |
TWI385497B (zh) | 啟動電壓模式切換電源供應至偏壓負載之方法 | |
JP5809833B2 (ja) | モータ駆動装置及びこれを用いたモータ装置 | |
US5966003A (en) | DC-DC converter control circuit | |
US6608520B1 (en) | Regulator circuit | |
WO2008065941A1 (fr) | Circuit électronique | |
US7092226B2 (en) | Constant-voltage power supply circuit | |
CN113009953B (zh) | 调节器用半导体集成电路以及风扇电动机系统 | |
JP5115346B2 (ja) | 電源制御用半導体集積回路 | |
JP3691635B2 (ja) | 電圧制御回路及びdc/dcコンバータ | |
JP6417945B2 (ja) | 電源回路 | |
US5821740A (en) | DC-to-DC converter having fast over-current detection and associated methods | |
JPH09117055A (ja) | モータ拘束時におけるモータ焼損防止機能を備えたモータ制御回路 | |
JPH1042586A (ja) | モータ駆動回路 | |
JP6405948B2 (ja) | レギュレータ用半導体集積回路 | |
JP3798527B2 (ja) | Dc−dcコンバータの駆動回路の制御方法、dc−dcコンバータの制御回路、dc−dcコンバータ | |
JP2002196830A (ja) | 定電圧レギュレータ及びその使用方法 | |
JP3763771B2 (ja) | Dc−dcコンバータ及びdc−dcコンバータの異常検知方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200580007230.X Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2006512322 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020067016932 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007171584 Country of ref document: US Ref document number: 10599114 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: DE |
|
122 | Ep: pct application non-entry in european phase | ||
WWP | Wipo information: published in national office |
Ref document number: 10599114 Country of ref document: US |