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1. 发明专利

JP2002095264A PWM INVERTER 失效
公开(公告)号：JP2002095264A
公开(公告)日：2002-03-29
申请号：JP2000281125
申请日：2000-09-18
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： WATANABE KATSUYUKI
IPC分类号： H02M7/48 , H02M7/5387 , H02P27/06 , H02P27/08 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To solve the problem that a conventional method generates an LC resonance phenomenon from wiring inductance and stray capacitance because it takes current driving a motor as a sample at the summit of a triangular wave signal with a voltage type PWM inverter before current detection. SOLUTION: An L-R parallel circuit 13 consisting of Lf and Rf is inserted into a wiring between the output terminal of the inverter 2 and the motor 3 to pass a high-frequency component through Rf side to increase the damping rate of a series resonance circuit consisting of the wiring inductance L0 and stray capacitance C0. Thus, the rate of surge current by LC resonance included in inverter output current is decreased, thereby extracting a fundamental wave current component satisfactorily.

2. 发明专利

JP2001103774A VARIABLE SPEED CONTROLLER FOR INDUCTION MOTOR 失效
公开(公告)号：JP2001103774A
公开(公告)日：2001-04-13
申请号：JP27784399
申请日：1999-09-30
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： WATANABE KATSUYUKI
IPC分类号： H02P3/18 , H02P27/06 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To miniaturize a controller and to reduce its cost by absorbing generated power with a system other than generator braking or regenerative braking and to solve long deceleration time that is caused by low deceleration rate by a software system. SOLUTION: In variable speed controller provided with an automatic voltage controlling part 10 for holding the output voltage of an inverter 2 in a state of a constant V/f ratio against fluctuation of a DC voltage, the speed deceleration state of an electric motor is detected from the rise of a DC intermediate voltage by the comparing part 113A of an output voltage stressing circuit 13. This detection causes a changeover part 13B to raise the output of the automatic voltage controlling part 10, thereby increasing the output voltage of the inverter. As a result, the efficiency of power conversion in the electric motor and inverter is lowered and, by increasing the power consumed by the motor and inverters, the voltage rise of the DC intermediate circuit is suppressed. This invention includes detection of the speed deceleration state of the motor from its effective power and the direct raise of the current setting signals of the inverter by the detection of the speed deceleration state.

3. 发明专利

JP2000209854A SEPARATELY EXCITED FLYBACK TYPE SWITCHING REGULATOR 失效
公开(公告)号：JP2000209854A
公开(公告)日：2000-07-28
申请号：JP369899
申请日：1999-01-11
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： WATANABE KATSUYUKI
IPC分类号： H02M3/28 , H02M3/335
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive separately excited flyback type switching regulator in which power supply efficiency is enhanced while decreasing the number of windings required for a transformer. SOLUTION: An inverting circuit 14, a delay circuit 15 and a timer circuit 16 obtain the off interval signal of a switching element 2 during which a sample hold circuit 13 detects the off time voltage of the switching element. A subtraction circuit 17 subtracts an input voltage Ein detected by a voltage division circuit 11 from the off time voltage to produce a voltage proportional to the output voltage E0 which is used, as a voltage detection signal, by a control amplifier 18 and a comparator 19 for controlling the switching element. Capacitor charges in a snubber circuit of the switching element 2 may be employed as the control power supply for a control circuit.

4. 发明专利

JPH08331853A CONTROL OF INVERTER 失效
公开(公告)号：JPH08331853A
公开(公告)日：1996-12-13
申请号：JP13141595
申请日：1995-05-30
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： WATANABE KATSUYUKI
IPC分类号： H02M7/48 , H02M7/497 , H02P27/06 , H02P27/08 , H02P7/63
摘要： PURPOSE: To provide a method of controlling an inverter which can reduce the capacitor of a bypass capacitor which is used in common when two units of inverters are integrated in structure. CONSTITUTION: In the case where two inverters I, II are integrated to use in common the power supply V and a capacitor C to flow a switching harmonic current and to drive by the PWM control using a triangular carrier signal, phases of the triangular carrier to form the switching pulse to be supplied respectively to each inverter I, II is mutually shifted.

5. 发明专利

JPH0880836A BRAKE DEVICE OF ELECTRIC VEHICLE 失效
公开(公告)号：JPH0880836A
公开(公告)日：1996-03-26
申请号：JP11144195
申请日：1995-05-10
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： WATANABE KATSUYUKI
IPC分类号： B60T13/20
摘要： PURPOSE: To improve operability by generating braking force suitable for speed with simple constitution by making negative pressure to be generated by a negative pressure generating means variable according to the output of an electric motor to drive an electric vehicle. CONSTITUTION: A vacuum pump 17 to be connected to a master cylinder 13 through a flow passage 16 is driven with its output made variable by means of an electric motor 18, and when a brake pedal 11 is stepped on, a master cylinder 13 is operated through a push rod 12, and a brake mechainsm 14 is operated. At this time, the electric motor 18 is driven, and negative pressure by means of the vacuum pump 17 acts on the master cylinder 13, and the stepping force of the brake pedal 11 is assisted, and while a pressure sensor 19 detects negative pressure force to act on the master cylinder 13 through the passage 16 and conducts output to a comparator 22, a negative pressure command map 24 sets the command value of negative pressure on the basis of the speed signal 23 of the electric motor 18 and conducts output to the comparator 22. A controller 20 conducts the drive control of the electric motor 18 according to the increase/decrease value of the comparator 22.

6. 发明专利

JPH1032990A CONTROL SYSTEM FOR INDUCTION MOTOR 失效
公开(公告)号：JPH1032990A
公开(公告)日：1998-02-03
申请号：JP18708696
申请日：1996-07-17
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： WATANABE KATSUYUKI
IPC分类号： H02P27/06 , H02P5/41
摘要： PROBLEM TO BE SOLVED: To provide a control system for an induction motor by a voltage-type PWM inverter, by which an efficiency drop can be suppressed at a light load irrespective of the kind of a load. SOLUTION: A voltage-type inverter is used as the driving power supply of an induction motor 8, the gate of a main circuit 7 is controlled by an approximately sinusoidal wave PWM signal generator 6, and the motor 8 is driven at a variable speed. In this case, two-phase current instantaneous values iu , iw are detected as a primary current. The current instantaneous values iu , iw and phase data θ on output-voltage instruction sine waves from the approximately sinusoidal wave PWM signal generator 6 are used, an active-current component Iα whose phase is identical to that of the output-voltage instruction sine waves and a reactive-current component Iβ having a π/2 phase difference are separated in a coordinate converter 10. Iα /Iβ =Adet is found, and it is used as the judgment value of a load torque. The Adet is compared with a reference set value Aref . When Adet >Aref , a voltage is controlled so as to be increased. When Adet

7. 发明专利

JPH07213091A METHOD OF COOLING POWER CONVERSION DEVICE FOR ELECTRIC CAR 失效
公开(公告)号：JPH07213091A
公开(公告)日：1995-08-11
申请号：JP432894
申请日：1994-01-20
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： WATANABE KATSUYUKI
IPC分类号： B60L15/00 , H02P7/00 , H02P25/098 , H02P29/00 , H02P29/60 , H02P29/68
摘要： PURPOSE:To obtain a cooling method in which the noise of a cooling fan is reduced by a method wherein electric energy consumed in order to operate the cooling fan is saved. CONSTITUTION:In the cooling method of a semiconductor element 1 for a power conversion device which controls a motor for an electric car, the temperature Tf of a radiation fin 2 which has been attached to the semiconductor element 1 is detected, and a cooling air velocity is controlled when the temperature Tf is at a set value Tfmax or lower.

8. 发明专利

JPH0833104A COOLING METHOD FOR POWER CONVERTER OF ELECTRIC MOTOR VEHICLE 失效
公开(公告)号：JPH0833104A
公开(公告)日：1996-02-02
申请号：JP16085794
申请日：1994-07-13
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： WATANABE KATSUYUKI
IPC分类号： H05K7/20 , B60L3/00 , H02M7/04
摘要： PURPOSE:To provide a method for cooling a power converter of an electric motor vehicle in which electric energy to be consumed to drive a cooling fan is saved and noise of the fan can be reduced. CONSTITUTION:The temperature Tfn of a heat dissipating fan 3 mounted at the semiconductor element of a power converter 2 for controlling a motor 1 for an electric motor vehicle and a current value I1, a voltage value Vdc in continuity with the element are detected, and the junction temperature Tjn of the element is estimated. If it is lower than the maximum using set value Tjmax, cooling air velocity is controlled to reduce power consumption for driving a cooling fan 4, noise of the fan 4 at the time of a light load is decreased, and traveling distance per one charge can be prolonged.

9. 发明专利

JPH077815A METHOD FOR OPERATING DRIVING MOTOR OF ELECTRIC AUTOMOBILE 失效
公开(公告)号：JPH077815A
公开(公告)日：1995-01-10
申请号：JP14884893
申请日：1993-06-21
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： WATANABE KATSUYUKI , MORI MASATO
IPC分类号： B60L15/20
摘要： PURPOSE:To easily shift the change gear of an electric automobile adopting a manual change gear system by generating the torque corresponding to the pressing down amount of an accelerator pedal while a clutch is engaged and making the rotating speed of a motor equal of the speed of a wheel-side clutch disc immediately before the disengagement of the clutch when the clutch is disengaged. CONSTITUTION:A controller 10 inputs the rotating speed of a motor 8 from the encoder 9 of the motor 8, signals indicating the engaging and disengaging states of a clutch 4 from the clutch 4, gear position signals G from a change gear 5, and accelerator pressing down amount signals A from an accelerator pedal 7. The controller 10 makes the motor 8 generate torques in accordance with the signals A while the clutch 4 is engaged. When the clutch 4 is disengaged, the controller 10 calculates the rotating speed of the wheel-side clutch disc 4a of the clutch 4 from the rotating speed of the motor 8 immediately before the disengagement of the clutch 4 and the change gear ratio between the new and old gear positions and controls the motor 8 so that the rotating speed of the motor 8 can become equal to the calculated rotating speed. Therefore, the gear shifting operation can be performed smoothly.

10. 发明专利

JPH077814A METHOD FOR OPERATING DRIVING MOTOR OF ELECTRIC AUTOMOBILE 失效
公开(公告)号：JPH077814A
公开(公告)日：1995-01-10
申请号：JP14884793
申请日：1993-06-21
申请人： MEIDENSHA ELECTRIC MFG CO LTD
发明人： WATANABE KATSUYUKI , MORI MASATO
IPC分类号： B60L15/20
摘要： PURPOSE:To smoothly shift the change gear of an electric automobile adopting a manual change gear system by generating the torque corresponding to the pressing down amount of an accelerator pedal while a clutch is engaged or making the rotating speed of a motor equal to the rotating speed of the wheel- side clutch disk of the clutch when the clutch is disengaged. CONSTITUTION:A controller 10 inputs the speed V of a vehicle from a speedometer 3, the rotating speed of a motor 8 from the encoder 9 of the motor 8, signals K indicating the engaging and disengaging states of a clutch 4 from the clutch 4, gear position signals G from a change gear 5, and accelerator pedal pressing down amount signals A from an accelerator pedal 7. The controller 10 makes the motor 8 generate torques in accordance with the signals A while the clutch 4 is engaged. When the clutch 4 is disengaged, the controller 10 controls the rotating speed of the motor 8 so that the rotating speed can become equal to the rotating speed of a wheel-side clutch disc 4a. Therefore, the gear shifting operation can be performed smoothly.

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