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1. 发明专利

JPH09131090A DRIVING EQUIPMENT FOR DC MOTOR 失效
公开(公告)号：JPH09131090A
公开(公告)日：1997-05-16
申请号：JP28366695
申请日：1995-10-31
申请人： SHIBAURA ENG WORKS LTD
发明人： KATAGIRI SHINICHIRO
IPC分类号： H02P6/06
摘要： PROBLEM TO BE SOLVED: To lessen noise and oscillation of a motor by preventing a change in current in a coil of the motor when a switching element which drives the motor is switched from a cut-off state to a conduction state. SOLUTION: Driving signals for rotating a DC motor 22 at specified numbers of rotations are output to coils 23-25 of a plurality of phases of the DC motor 22 from switching elements Q1-Q6 in a plurality of stages respectively. To the switching elements Q1-Q6, drive controlling signals are input. At one level, the drive controlling signals make corresponding switching elements, for example, one of the transistors(Tr's) Q1-Q3, turn on and at the other level, they cut off the Tr Q4. In the drive controlling signals, conduction periods wherein the Tr's Q1-Q6 turn on and cut-off periods wherein the Tr's Q1-Q6 are cut off are provided alternately. In a first period of the conduction period which starts from a start timing point to a certain point, one levels and the other levels are repeated in a cycle which is shorter than the first period. In a second period which is the remaining period of the conduction period, the signals stay at one level.

2. 发明专利

JPH09131089A DRIVER FOR DC MOTOR 失效
公开(公告)号：JPH09131089A
公开(公告)日：1997-05-16
申请号：JP28303095
申请日：1995-10-31
申请人： SHIBAURA ENG WORKS LTD
发明人： KATAGIRI SHINICHIRO
IPC分类号： H02P6/06
摘要： PROBLEM TO BE SOLVED: To provide a DC motor driver capable of causing overlapping currents to flow by a simple construction. SOLUTION: A control signal generating circuit 30 for inputting drive control signals HU, HV, HW, LU, LV, LW to the bases of the transistors Q1, Q2, Q3, Q4, Q5, Q6 of an inverter circuit 28 is provided. The control signal generating circuit 30 has a first control signal generating section 31 which receives as inputs detected signals PS1, PS2, PS3 outputted from individual magnetic pole detecting elements 27, and turning individual one-phase transistors on or off in order over the period of a first electrical angle, and a second control signal generating section 32 which generates second control signals for turning individual one-phase transistors on or off in order over the period of a second electrical angle. The first and second control signals are switched over interchangeably by a change-over switch section 33 and are outputted outside.

3. 发明专利

JPH05168277A THREE-PHASE DC BRUSHLESS MOTOR 失效
公开(公告)号：JPH05168277A
公开(公告)日：1993-07-02
申请号：JP35074891
申请日：1991-12-12
申请人： SHIBAURA ENG WORKS LTD
发明人： YAMAZAKI KENJI , ISHIMINE HITOSHI , KATAGIRI SHINICHIRO
IPC分类号： H02H7/097 , H02P6/12
摘要： PURPOSE:To prevent damage of a switching element, etc., due to an induced current at the time of reversing and to protect an inverter by detecting the induced current generated in an armature winding when a rotor is reversely rotated by an external force, and turning OFF all the switching elements when the current exceeds a set value. CONSTITUTION:A current detecting resistor 50 is connected to collectors of input side transistors Tr1-Tr3 to be controlled ON, OFF, and a current detecting resistor 52 is connected to diodes D1-D3. Protecting means 54 for determining amplitudes of the detected currents by the resistors 50, 52 and outputting a stop signal S when they are a predetermined value or more is provided. The means 54 has a comparator for comparing voltage drops of the resistors 50, 52 with a set value set by a setter and outputting a stop signal S when the voltage drops of the resistors 50, 52 increase a predetermined value or more. A controller 26 so sends a signal to drivers 28, 30 as to simultaneously turn OFF all the transistors Tr1-Tr6.

4. 发明专利

JPH1127950A PULSE WIDTH MODULATION LOAD DRIVE CIRCUIT 失效
公开(公告)号：JPH1127950A
公开(公告)日：1999-01-29
申请号：JP18013597
申请日：1997-07-04
申请人： SHIBAURA ENG WORKS LTD
发明人： KATAGIRI SHINICHIRO
IPC分类号： H02M7/48
摘要： PROBLEM TO BE SOLVED: To provide a drive device which eliminates on-duty limitation on a switching element which controls power supply to a load, and is capable of being efficiently switch-controlled. SOLUTION: This pulse width modulation load drive circuit is provided with a transistor 101 and a transistor 102. In accordance with a source-side control signal CNH, a transistor drive control circuit 103 turn on the transistor 101 to apply power to a load 111. In order to turn off the transistor 101, the transistor 102 is turned on by a transistor drive control circuit 104 which, when discharging a capacitor 106, operates in accordance with a sink-side control signal CNL. A voltage-sensing circuit 109 measures the voltage level of voltage VBS for driving the transistor drive circuit 103, and based on the result of the level detection, a refresh operation circuit 110 generates a refresh signal for on-controlling the transistor 102 only for a certain period of time. Thereby the transistor 102 is on/off-controlled by the transistor drive circuit 104, based on the sink-side control signal CNL and the refresh signal.

5. 发明专利

JPH0898578A DRIVER FOR DIRECT CURRENT MOTOR 失效
公开(公告)号：JPH0898578A
公开(公告)日：1996-04-12
申请号：JP22355694
申请日：1994-09-19
申请人： SHIBAURA ENG WORKS LTD
发明人： KATAGIRI SHINICHIRO
IPC分类号： H02P6/22 , H02P6/12
摘要： PURPOSE: To prevent the breakdown of switching elements by excessive current, by interrupting drive signals outputted to the switching elements in a specified stage of a plurality of stages from a drive control means for a specified period of time, in correspondence with the inputting of a reverse signal into a delay means. CONSTITUTION: A driver 21 is provided with a delay circuit 32 into which a reverse signal is inputted from outside to reverse the direction of revolution of a motor 22. The delay circuit 32 delays the reverse signal by a specified period of time, and inputs it to a three-phase distributing circuit 30. Besides, the driver 21 is provided with a timer circuit 33 to which the reverse signal is inputted, and a forced turn-off circuit 34 arranged between the three-phase distributing circuit 30 and an inverter circuit 28. The timer circuit 33 measures a specified time from the point of time when the reverse signal is inputted, and outputs a completion signal to the forced turn-off circuit 34 at the point of time of the completion of this time measuring operation. Consequently, breakdown of transistors Q1 -Q6 can be prevented even when a reverse signal is inputted for reversing the revolution of the motor 22.

6. 发明专利

JPH0897578A PRINT-WIRING DEVICE 失效
公开(公告)号：JPH0897578A
公开(公告)日：1996-04-12
申请号：JP25433694
申请日：1994-09-22
申请人： SHIBAURA ENG WORKS LTD
发明人： KATAGIRI SHINICHIRO
IPC分类号： H05K9/00 , H05K7/14
摘要： PURPOSE: To obtain a print-wiring device which does not malfunction even when the capacitance of a capacitor formed between printed wiring and shielding member is reduced and the shielding member is provided adjacently to the printed wiring. CONSTITUTION: After a shielding member 2 is formed of a conductive metallic material and a printed board 4 equipped with printed wiring 6 in parallel with the member 2 is provided, the board 4 and member 2 are united in one body by making the distance between the wiring 6 and the part of the member,2 corresponding to the wiring 6 larger or making the capacitance between the wiring 6 and member 2 substantially smaller by forming a through hole.

7. 发明专利

JPH07308091A DRIVING APPARATUS FOR D.C. BRUSHLESS MOTOR 失效
公开(公告)号：JPH07308091A
公开(公告)日：1995-11-21
申请号：JP9731594
申请日：1994-05-11
申请人： SHIBAURA ENG WORKS LTD
发明人： KATAGIRI SHINICHIRO
IPC分类号： H02P6/06 , H02P6/08 , H02P6/16
摘要： PURPOSE:To provide a driving apparatus for D.C brushless motors that makes possible drive corresponding to the required number of motor rotations and the characteristics of a motor used, and thus the significant improvement of driving efficiency. CONSTITUTION:In addition to a drive circuit 2, the driving apparatus for D.C. brushless motors is provided with an inverter circuit 4; a speed detecting circuit 5 that outputs detection signals having a voltage corresponding to the frequency of speed signals; and a PWM circuit 6 that outputs pulse width-modulated control signals based on speed instruction signal and the detection signal from the speed detecting circuit 5. The driving apparatus is also provided with a virtual neutral point creating circuit 7 that generates the signal of the virtual neutral point of the motor 1 corresponding to the detection signal; a position detecting circuit 8 that outputs position detection signals corresponding to the rotational position of the motor 1 based on the virtual neutral point signal and the driving signal from the inverter circuit 4; and a phase angle control unit circuit 9 that generates phase angle control signals for each phase.

8. 发明专利

JPH07107727A MOTOR 失效
公开(公告)号：JPH07107727A
公开(公告)日：1995-04-21
申请号：JP24778693
申请日：1993-10-04
申请人： SHIBAURA ENG WORKS LTD
发明人： KATAGIRI SHINICHIRO
IPC分类号： H02K29/08
摘要： PURPOSE:To reduce stray capacitance between a motor and a conductive substance on the outside of a motor, and to prevent the malfunction and breakdown of a drive circuit by installing a PC board, on a surface of which components of the drive circuit are mounted, onto the top face or underside of a stator while the surface is directed toward the stator side. CONSTITUTION:A projecting piece 14 is set up onto the top face of a stator 12, a PC board 16, on a surface of which parts 18 constituting a drive circuit for a transistor, a resistor, etc., are arranged, is fitted to the projecting piece 14 so that the surface is directed toward the stator 12 side, and the stator 12, the PC board 16 and the components 18 are covered with a molding resin, thus configuring a casing for a motor 10. Accordingly, the parts 18 constituting the drive circuit are installed inside the motor 10 toward the stator 12 side, thus reducing stray capacitance between the motor 10 and a conductive body on the outside of the motor 10, then preventing the malfunction and breakdown of the drive circuit. The PC board 16 is formed in four layer structure, and two layers of the four layers are used as grounding patterns for a noise countermeasure, thus obviating a malfunction to noises.

9. 发明专利

JPH10127084A PROTECTOR FOR BRUSHLESS MOTOR 失效
公开(公告)号：JPH10127084A
公开(公告)日：1998-05-15
申请号：JP29466196
申请日：1996-10-17
申请人： SHIBAURA ENG WORKS LTD
发明人： KATAGIRI SHINICHIRO
IPC分类号： H02P6/12
摘要： PROBLEM TO BE SOLVED: To protect the switching elements and the like at an inverter section against damage when rotation of a motor is reversed due to an external force by detecting reversal of rotation of a rotor and deciding that a speed command value is equal to or lower than a set level and then turning all switching elements off based on a stop signal. SOLUTION: Reversal of rotation of a rotor 14 is detected at a reversal detecting section 50. A speed setting section 52 outputs a set speed V0 which is then compared, at a comparing section 54, with a speed command value V1 thus deciding that the speed command value V0 is lower than a set speed. A stop signal S is delivered when the rotor 14 is rotating reversely and the rotational speed command value V1 is lower than the set value V0 in order to turn off all transistors Tr1 -Tr6 . According to the arrangement, an inverter section 12 can be protected by preventing the switching elements and the like from being damaged with a current induced by an external force when rotation of the rotor 14 is reversed.

10. 发明专利

JPH09308174A MOLDED MOTOR 失效
公开(公告)号：JPH09308174A
公开(公告)日：1997-11-28
申请号：JP14070196
申请日：1996-05-10
申请人： SHIBAURA ENG WORKS LTD
发明人： ENDO SHOZO , MURAKAMI SUSUMU , KIKUCHI YUSUKE , KATAGIRI SHINICHIRO
IPC分类号： H02K29/00 , H02K5/08
摘要： PROBLEM TO BE SOLVED: To improve the workability of a molded motor when assembling a board into it, by preventing the peelings and disconnections of the patterns of its board and preventing the breakings of the mounting parts on its board, and by reducing the number of its parts. SOLUTION: As a board integrated into a molded motor 1, a metallic board 5 using a metallic plate 6 as its base material is used. Fastening an insulation material 7 to the surface of the metallic plate 6 of the metallic board 5, such electronic parts as a transistor 24 are mounted on the insulation material 7 to perform the wirings of the patterns for interconnecting the electronic parts or for connecting the windings of the molded motor 1 therewith.

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