• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    AC electric drive containing an asynchronous motor, a multiphase adjustable current source, to the output of which an asynchronous motor with a speed sensor on the shaft is connected, the outputs of which are connected to the first input of the comparison unit, the second input of which is connected to the speed reference unit, and the output of the comparison unit through The speed controller is connected to the first input of the coordinate converter and the input of the frequency generator of the current in the rotor, the output of which through the adder is connected to the inputs of the reference generators with and the outputs of the reference signal generators are connected through the first and second multiplication units to the reference inputs of the coordinate converter, the outputs of which are connected via the phase converter to the inputs of the adjustable current source, and the second input of the adder is connected to the speed sensor, which replicates with to improve efficiency and reduce noise at low engine load, the coordinate converter contains the third and fourth multiplication blocks, two adders and an inversion block, with the first inputs The adder is connected to the corresponding outputs of the third and fourth multiplication units, the second inputs are connected to the reference inputs of the coordinate converter, their outputs are the outputs of the coordinate converter, the first input of the third multiplication unit is through an inversion unit, and the first input of the fourth multiplication unit is directly connected to the reference inputs in -hots of the coordinate preabrazion-atel, the second inputs of the third and fourth multiplication blocks are with the input of the coordinate transducer, the output is formed l current roto00 D is connected to the second inputs of the first and second multipliers.
    公开号:SU1114358A3
    申请号:SU803215304
    申请日:1980-12-10
    公开日:1984-09-15
    发明作者:Кавада Сигеки；Исида Хироси
    申请人:Фудзицу Фанук Лимитед (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to electrical engineering, and more specifically to an electric drive; using an asynchronous motor, and can be used in drives operating with a large range of load variation. An alternating-current electric drive containing an adjustable-current energy converter, phase-sensitive rectifiers, selsyn, modulators, angular position sensor, a generator, is known, the output of which through an adder and amplifier is connected to phase-sensitive rectifiers connected to control inputs of converters Got energy ll. A disadvantage of the known electric drive is the low reliability associated with the presence of a large number of rotating nodes of alternating and direct current machines. The closest to the proposed technical solution is an AC electric drive containing a multiphase adjustable current source, to the output of which an asynchronous electric motor with a speed sensor on the shaft is connected, the outputs of which are connected to the first input of the comparison unit, the second input of which is connected to the speed reference unit, and the output of the comparator unit through the speed controller is connected to the first input of the coordinate converter and to the input of the current frequency driver in the rotor, the output of which through an adder with is connected to the inputs of the reference signal generators, and the outputs of the reference signal generators are connected via the first and second multiplication blocks to the reference inputs of the common converter, the outputs of which are connected via a phase converter to the inputs of the adjustable current source, while the second input of the adder is connected to the sensor speed C2. A disadvantage of the known electric water is that it does not provide an economical regulation of the conditions of a large load change and creates noise at low loads. The purpose of the invention is to improve efficiency and reduce noise at low engine load. The goal is achieved in those in the variable-variable drive that contains an asynchronous motor. a multiphase adjustable current source, to the output of which an asynchronous electric motor with a speed sensor on the shaft is connected, the terminals are coherently connected to the first comparison input, the second input of which is connected to the speed reference unit, and the output of the comparison unit is connected to the first input of the coordinate converter and to the input of the frequency driver current in the rotor, the output of which through the adder is connected to the inputs of the generators of the reference signals, and the outputs of the generators of the reference signals are connected through the first and The second multiplication units with the reference inputs of the coordinate converter, the outputs of which are connected via a phase converter, the generator with the inputs of an adjustable current source, while the second input of the adder is connected to the speed sensor, the coordinate converter is holding the third and fourth blocks of multiplication, two adders and blurs an inversion loop, wherein the first inputs of the adders are connected to the corresponding outputs of the third and fourth multiplication units, the second inputs are connected to the reference inputs of the coordinate converter, the output Their outputs are the outputs of the coordinate converter, the first input of the third multiplication unit through the inversion unit, and the first input of the fourth multiplication loop is directly connected to the reference inputs of the coordinate converter, the second inputs of the third and fourth multiplicators are the input of the coordinate converter, the output of the current frequency generator in the rotor connected to the second inputs of the first and second multiplication blocks. The drawing shows an embodiment of an AC electric drive containing an energy converter with adjustable current 1, consisting of frequency converter 2, current sensors 3-5, the outputs of which are connected to subtractors 6-8, and the outputs of the latter through amplifiers 9-11 are connected to frequency converter 2, the outputs of which are connected to an asynchronous motor 12 with a speed sensor13 on the shaft. The outputs of speed sensor 13 are connected via frequency quadrant 14, frequency converter - voltage 15 is connected to the first input of comparison unit 16, the second input of which is connected to speed setting unit, and the output of comparison unit 16 through speed regulator 17 is connected to input of coordinate converter 18 and to the input of a frequency generator of current in the rotor 19, consisting of an absolute frequency determining unit 20 and a unit for determining the sign of the frequency of the current 21 in the rotor. The output of the frequency shaping unit in the rotor is connected to the adder 22, and the output of the block is determined by the absolute value of the frequency of the current in the rotor, connected to the 5th channel of the adder 22 via a voltage-to-frequency converter 23. The second input of the adder 22 is connected to the speed sensor 13 through a quad block frequency 14, and the output of the adder 22 through a reversible counter 24 is connected to the inputs of the generators of the reference signals 25 and 26, the outputs of which are connected through the first 27 and second 28 multiplication blocks with the reference inputs of the coordinate converter 18, ode through which phase of the inverter 29 are connected to the inputs of the subtractor blocks 6-8. At the same time, the coordinate converter 18 contains the third 30 and fourth 31 multiplication blocks, two adders 32 and 33 and an inversion block 34. The power inputs of the frequency frequency converter 2 through the rectifier 35 are designed to be connected to the power source 36. The electric drive works as follows. The speed reference signal is applied to the comparison unit 16. At the same time, if the rotational speed of the electric motor 12 is lower than prescribed, then an error is determined which, through the speed control 17, determines the value specifying the absolute value and sign of the slip part (w), which stating the magnitude of the load. The task for {absolute slip is summed in the adder 22 with a quadruple frequency of rotation from the frequency quadrupling unit 14. The result of the summation through the reversible counter 24 is fed to the inputs of the reference signal generators 25 and 26, which form the sin Ч and cos signals type of analog signals, where f is equivalent to the value (LU + ui) t. The values of these values are multiplied in the first and second blocks of multiplication 27 and 28 by the signal generated by the unit determining the absolute value of the frequency 20, which allows to take into account the magnitude of the load torque, i.e. get the values of Г sin and Т cosM. Then. - m pgl, these signals arrive at the third 30 and fourth 31 multiplication blocks, where they are multiplied by the signal E of the speed regulator 17, which leads to the formation of the task of load currents t | 5in4 and. The received signals in summation blocks 32 and 33 are added to the signals of blocks 27 and 28, forming the output signal .cos.-. iia current in phase A and signal + l cosM - signal in phase B, out of phase by 90 ° relative to the first. These two-phase stator currents are fed to a 29-phase number converter circuit that generates alternating-current signals Tu, Tu, 1, respectively, setting currents in the phases of the electric motor 12. Thus, using the invention reduces the excitation current of the asynchronous electric motor according to the reduction of the load of the electric motor . This ensures that the asynchronous motor works silently even when it is operating under light load, since no excitation noise occurs (they are generated when the asynchronous motor is controlled by a conventional vector control system). At the same time, energy consumption is reduced and the thyroid center is reduced.
    权利要求:
    Claims (1)
    [1]
    An AC electric drive containing an asynchronous motor, a multiphase adjustable current source, the output of which is connected to an asynchronous electric motor with a speed sensor on the shaft, the terminals of which are connected to the first input of the comparison unit, the second input of which is connected to the speed reference unit, and the output of the comparison unit through the speed controller connected to the first input of the coordinate transformer and the input of the current frequency driver in the rotor, the output of which through the adder is connected to the inputs of the reference signal generators and the outputs of the reference signal generators are connected through the first and second multiplication units to the reference inputs of the coordinate converter, the outputs of which are connected through a phase converter to the inputs of an adjustable current source, and the second input of the adder is connected to a fast-1I sensor, characterized in that, with the purpose of increasing efficiency. and reducing noise at low engine load, the coordinate converter contains the third and fourth multiplication blocks, two adders and an invert unit, while the first inputs of the adder are connected inens with corresponding outputs of the third and fourth g multiplication blocks, the second inputs are connected to the reference inputs of the coordinate transformer, their outputs are the outputs of the coordinate transformer, the first input of the third multiplication block through the invert block, and the first input of the fourth multiplication block is directly connected to the reference coordinate converter, the second inputs of the third and fourth blocks of multiplication are the input of the coordinate converter, the output of the current shaper in the rotor is connected to the second inputs of the first and second blocks of multiplication.
    )
    1 114358
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    同族专利:
    公开号 | 公开日
    US4361794A|1982-11-30|
    DE3070294D1|1985-04-18|
    EP0030462A3|1982-03-03|
    EP0030462A2|1981-06-17|
    JPS6031196B2|1985-07-20|
    EP0030462B1|1985-03-13|
    JPS5683284A|1981-07-07|
    引用文献:
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    US4028600A|1973-08-23|1977-06-07|Siemens Aktiengesellschaft|Method and apparatus for slow speed operation of an inverter controlled rotating field machine|
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    JPS5980186A|1982-10-26|1984-05-09|Fanuc Ltd|Rotor position detecting circuit for motor|
    JPH0334313B2|1983-02-23|1991-05-22|Hitachi Ltd|
    CA1216323A|1983-02-28|1987-01-06|Hiroshi Nagase|Method and apparatus for controlling pwm inverter|
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    US4509003A|1983-03-10|1985-04-02|Kabushiki Kaisha Meidensha|Vector control method and system for an induction motor|
    JPS59178995A|1983-03-28|1984-10-11|Meidensha Electric Mfg Co Ltd|Function generator for controlling vector|
    JPH0564560B2|1983-09-30|1993-09-14|Matsushita Electric Ind Co Ltd|
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    JPS6126487A|1984-07-13|1986-02-05|Fujitec Co Ltd|Controller of ac elevator|
    US4734628A|1986-12-01|1988-03-29|Carrier Corporation|Electrically commutated, variable speed compressor control system|
    FR2614481B1|1987-02-13|1990-08-31|Pk I|METHOD FOR CONTROLLING AN ASYNCHRONOUS MOTOR AND ELECTRIC DRIVE IMPLEMENTING THIS METHOD|
    JP2845911B2|1988-12-24|1999-01-13|ファナック株式会社|Slip frequency control method for induction motor|
    US5237247A|1989-10-17|1993-08-17|Sankyo Seiki Mfg. Co., Ltd.|Three-phase sine wave signal synthesizing circuit and brushless motor drive circuit using the same|
    JPH03169291A|1989-11-25|1991-07-22|Hitachi Ltd|Controller of induction motor|
    US5032771A|1990-08-09|1991-07-16|Allen-Bradley Company, Inc.|Slip control based on sensing voltage fed to an induction motor|
    KR930007600B1|1990-08-14|1993-08-13|삼성전자 주식회사|Motor current phase delay compensating method|
    US5550450A|1993-04-28|1996-08-27|Otis Elevator Company|Dead-time effect compensation for pulse-width modulated inverters and converters|
    US5541488A|1994-04-11|1996-07-30|Sundstrand Corporation|Method and apparatus for controlling induction motors|
    DE19545709C2|1995-12-07|2000-04-13|Danfoss As|Method for field-oriented control of an induction motor|
    JP3262709B2|1996-04-25|2002-03-04|三菱電機株式会社|Motor vector control method and vector control inverter device|
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    CN103368474B|2012-03-27|2015-12-02|比亚迪股份有限公司|A kind of motor speed control method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP54160500A|JPS6031196B2|1979-12-11|1979-12-11|
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