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41. 发明专利

JP2001057797A CONTROL DEVICE OF ELECTRIC MOTOR 失效
公开(公告)号：JP2001057797A
公开(公告)日：2001-02-27
申请号：JP23127399
申请日：1999-08-18
申请人： TOYO ELECTRIC MFG CO LTD
发明人： OMORI YOICHI , NAKANISHI TOSHITO
IPC分类号： H02P25/26 , H02P21/14 , H02P21/18 , H02P21/24 , H02P23/00 , H02P23/07 , H02P23/14 , H02P7/625 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To accurately estimate the electrical constant of an electric motor in a total speed range and to achieve accurate torque control by outputting a conversion coefficient for matching constant identifier output to constant estimator output by a mode decision device output, the constant identification device output, and the constant estimation device output. SOLUTION: A constant estimation device 9 inputs the stator temperature of an electric motor 2 and a conversion coefficient K of a conversion coefficient adjuster and outputs the electrical constant of the electric motor 2 as C2. The mode decision device 11 sets an output signal M to a high-speed mode when a rotary speed N of the electric motor 2 of the output of a speed detector 6 is larger than a given value, and sets the output signal M to a low-speed mode when the rotary speed N is smaller than the given value. A selector 12 selects C1 when the output M of the mode decision device is in the high-speed mode, and selects C2 when M is in the low-speed mode before outputting to a torque controller 7 as an electrical constant C. A modulation coefficient adjuster 10 adjusts a conversion coefficient K that is used by the constant estimator 9 according to temperature so that C1 coincides with C2 when the output M of the mode decision device is in the high-speed mode.

42. 发明专利

JP2001022450A DRIVING CONTROLLER FOR PUMP 失效
公开(公告)号：JP2001022450A
公开(公告)日：2001-01-26
申请号：JP19051299
申请日：1999-07-05
申请人： SHINTOO KK
发明人： HARADA KAZUHIRO , MITSUI MASAKI
IPC分类号： F04D15/00 , F04B49/00 , F04B49/02 , G05D9/12 , H02P21/34 , H02P23/00 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To provide the driving controller of a well pump, where malfunction does not occur when power is started. SOLUTION: Since a starting control circuit 11 operates and the smoothing capacitor C1 of a pump driving control circuit 10 is charged by the voltage of a second DC power source 12 when power is supplied or when a system is restored after a power cut, the delay of the start of the smoothing capacitor C1 smoothing rectifying output owing to shorting between the electrodes of a water level detection electrode 6 by the electric resistance of water is dissolved. Then, the malfunction of water level detecting owing to the input of reference voltage to the plus input terminal of a comparator 7 before the start of a first DC voltage DC1 is avoided at the time of starting.

43. 发明专利

JP2000324889A METHOD OF SUPPLYING COMMAND SELECTED BY USERS TO MOTOR CONTROLLER AND COMMAND MODULE THEREFOR 失效
公开(公告)号：JP2000324889A
公开(公告)日：2000-11-24
申请号：JP2000069350
申请日：2000-03-13
申请人： EATON CORP
发明人： YOUNGER CHARLES THEODORE , RUCHTI THOMAS MICHAEL , LINSKE ERIK WILLIAM
IPC分类号： H02P1/28 , G05B11/36 , H02P5/74 , H02P6/22 , H02P23/00 , H04Q9/00 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To enhance flexibility for users, and to reduce the cost of a controller by connecting a microcontroller to a communication network mutually, and transmitting a command signal from the controller to a motor controller on the network. SOLUTION: An input device 372 is mutually connected to a microcontroller 374, and the controller 374 is mutually connected to a network by a transceiver 376. Besides, the controller 374 connects a plurality of LEDs 378a-f mutually, and indicates the states of motor parameters. The controller 374 sends a command signal to an appropriate motor controller on the network by the pressing of a push botton 372, and executes a command which a user desires by this signal. When the controller 374 receives an effective signal from one of other motor controllers connected mutually to the network, the controller 374 similarly processes and interprets the received signal and executes a command.

44. 发明专利

JP2000278991A CONTROL OF THREE-PHASE AC INDUCTION MOTOR 失效
公开(公告)号：JP2000278991A
公开(公告)日：2000-10-06
申请号：JP2000069347
申请日：2000-03-13
申请人： EATON CORP
发明人： YOUNGER CHARLES THEODORE , MOORE GUY ALBERT , UNSWORTH PETER JOSEPH
IPC分类号： H02P1/28 , H02P1/26 , H02P3/18 , H02P23/00 , H02P27/02 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To provide the control of an AC induction motor which makes possible its smooth and stepped acceleration and deceleration. SOLUTION: To control the start, stop and operation of an AC motor 16, each winding of the motor 16 is connected to an AC power source 18 via thyristor switches 42, 44, 46 and by-pass contactors 50, 52, 54, and a voltage and a current are supplied to the motor 16. In this control, a pair of thyristor switches 42, 44, 46 are ignited progressively to increase the revolutions of the motor 16 nearly up to a full operating speed and when the motor 16 is at the operating speed, the by-pass contactors 50, 52, 54 are closed. If a voltage drop is detected at the thyristor switches 42, 44, 46, these switches 42, 44, 46 are immediately ignited and a motor current is transferred from the by-pass contactors 50, 52, 54 to the thyristor switches 42, 44, 46 so that the voltage and current of the motor 16 are maintained.

45. 发明专利

JP2000270529A MOTOR 失效
公开(公告)号：JP2000270529A
公开(公告)日：2000-09-29
申请号：JP7486699
申请日：1999-03-19
申请人： NTT DATA CORP
发明人： HANEDA SHOJI
IPC分类号： H02P21/34 , H02K23/44 , H02P23/00 , H02P23/16 , H02P23/24 , H02P25/10 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To realize flexible control of rotating velocity and rotation output through effective control of rush current of a commutator type motor, with a simplified structure introducing mechanical control. SOLUTION: A brush 3 slides in contact with a commutator 4 and supplies a drive current to a motor 2 via this commutator 4. A field torque controller 5 integrally and turnably supports a magnetic field 1 with respect to the axial line that is almost in common with the motor 2 to operate a torque against the reaction of rotation of the motor 2, and also adjusts and controls the torque of this field 1. The torque adjusting part adjusts a rotating torque against the reaction of the field 1 based on the control of controller. With adjustment of rotating torque against the reaction of the field 1 through adjustment of this torque adjusting part, the rotation angle position of the field 1, based on the rotation of motor 2 is also controlled. The field holding part integrally holds the field 1 to operate the rotating torque adjusted with the torque adjusting part.

46. 发明专利

JP2000184784A PWM INVERTER 失效
公开(公告)号：JP2000184784A
公开(公告)日：2000-06-30
申请号：JP35927498
申请日：1998-12-17
申请人： TOSHIBA CORP
发明人： AOKI JUNICHI
IPC分类号： H02M7/48 , H02P21/05 , H02P21/22 , H02P23/00 , H02P23/04 , H02P23/07 , H02P23/16 , H02P25/22 , H02P27/06 , H02P27/08 , H02P7/63 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To restrain generation of electromagnetic noise and vibration due to waveform distortion with the utilization rate of power supply voltage. SOLUTION: This PWM inverter drives an AC motor 1 having a plurality of single-phase windings as a multi-phase winding which generates a rotating magnetic field, and is provided for each of a pluraility of single-phase winding with current command determination parts 4-1 to 4-8 forming current commands Ir1 to Ir8 having a phase difference between each other based on a current criterion Ir and a rotor position detection signal Rp, and inverters 3-1 to 3-8 supplying current to the corresponding single-phase winding, meeting the current commands Ir1 to Ir8.

47. 发明专利

JP2000184782A HARMONIC REDUCER 失效
公开(公告)号：JP2000184782A
公开(公告)日：2000-06-30
申请号：JP35440298
申请日：1998-12-14
申请人： NISHISHIBA DENKI KK
发明人： TANIGUCHI TAKESHI , ITO HITOSHI
IPC分类号： H02J3/01 , H02M1/12 , H02M7/48 , H02P21/05 , H02P23/00 , H02P23/04 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To provide a harmonic reducer in which harmonics can be removed regardless of the frequency without requiring any capacitor. SOLUTION: A harmonic reducer comprises a two winding synchronous capacitor 2, an automatic voltage regulator 5 for controlling the output voltage of the synchronous capacitor 2 by regulating the field current thereof, and transformers 3A-3C. Primary winding of the transformer 3A-3C has one end connected with an inverter power supply 1 and the other end connected with one end of the synchronous capacitor 2, secondary winding of the transformer 3A-3C has one end connected with the other end of the synchronous capacitor 2 and the other end connected with a load 4A-4C. Since harmonics can be removed regardless of the frequency without requiring any capacitor, the load can be supplied with power while suppressing distortion in the voltage waveform of an inverter power supply 1.

48. 发明专利

JP2000152491A CIRCUIT FOR PREVENTING OPEN-PHASE AND REVERSE-PHASE OPERATION OF THREE-PHASE MOTOR 失效
公开(公告)号：JP2000152491A
公开(公告)日：2000-05-30
申请号：JP32502198
申请日：1998-11-16
申请人： SANDEN CORP
发明人： IZAWA KIKUO , KOIKE MOICHI , MIYAZAWA TADASHI
IPC分类号： H02H7/09 , H02H7/097 , H02P23/00 , H02P23/07 , H02P23/24 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To provide a circuit for preventing the open-phase or reverse-phase operation of a three-phase motor which can surely prevent the open-phase and reverse-phase operation of the motor, whether it is at start of operation of the three-phase motor or it is in operation. SOLUTION: In case that at least either contact 31 or 41 is in open condition between the contact 31 of a first reverse phase preventive relay 30 connected in the specified phase order of the supply circuit of a power source 1 and the second reverse phase preventive relay 40 connected in the specified phase order where one phase is slid from the first reverse phase preventive relay 30 to the supply circuit of the power source, the phase order of the supply power source is switched by a normal phase reverse phase switching relay circuit 20. Furthermore, in case that at least either of each contact 31 and 41 gets in open condition or gets in open condition during operation of a motor 2, the open-phase operation or the reverse-phase operation of the motor 2 can be surely prevented whether it is at start of operation or in operation by actuating an alarm 60.

49. 发明专利

JP3041123B2 失效
公开(公告)号：JP3041123B2
公开(公告)日：2000-05-15
申请号：JP2798792
申请日：1992-02-14
IPC分类号： D06F33/02 , D06F37/30 , H02P21/05 , H02P21/34 , H02P23/00 , H02P23/04 , H02P23/07 , H02P23/16 , H02P23/24 , H02P25/04 , H02P25/10 , H02P7/36

50. 发明专利

JP2000032800A CONTROL METHOD FOR SYNCHRONOUS MOTOR 失效
公开(公告)号：JP2000032800A
公开(公告)日：2000-01-28
申请号：JP21026398
申请日：1998-07-10
申请人： TOYO ELECTRIC MFG CO LTD
发明人： HAGIWARA SHIGENORI , OMORI YOICHI
IPC分类号： H02P21/00 , H02P23/00 , H02P27/04 , H02P7/36
摘要： PROBLEM TO BE SOLVED: To measure motor constants automatically by feeding a specified AC current in an arbitrary direction of a permanent magnet type synchronous motor and a direction perpendicular thereto and setting and storing respective inductance components and winding resistances from the magnitude and phase of the AC component of respective currents and voltages after a rotor is stopped. SOLUTION: A motor constant measuring means 8 inputs a primary current i1 and a primary voltage v1 and an AC current containing a DC component is fed in an arbitrary direction of a permanent magnet type synchronous motor 1 while an AC current containing no DC component having 90 deg. phase difference from the AC current is fed in an arbitrary direction perpendicular thereto. After a rotor is stopped, inductance components Lh, Lv and resistor components Rh, Rv, Rdc are determined from the AC components and phase of these voltages and currents. A setting/storing means 7 stores the inductance components Lh, Lv as inductance components Ld, Lq. The resistor component Rdc is set and stored as the winding resistance R of the permanent magnet type synchronous motor 1.

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