CN101479928B - Inverter control device and its operation method - Google Patents

Inverter control device and its operation method Download PDF

Info

Publication number
CN101479928B
CN101479928B CN2007800244377A CN200780024437A CN101479928B CN 101479928 B CN101479928 B CN 101479928B CN 2007800244377 A CN2007800244377 A CN 2007800244377A CN 200780024437 A CN200780024437 A CN 200780024437A CN 101479928 B CN101479928 B CN 101479928B
Authority
CN
China
Prior art keywords
power
circuit
speed command
voltage
value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN2007800244377A
Other languages
Chinese (zh)
Other versions
CN101479928A (en
Inventor
山本阳一
野中和浩
中井政树
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2006216779A external-priority patent/JP4831530B2/en
Application filed by Yaskawa Electric Corp filed Critical Yaskawa Electric Corp
Priority claimed from PCT/JP2007/060920 external-priority patent/WO2008001572A1/en
Publication of CN101479928A publication Critical patent/CN101479928A/en
Application granted granted Critical
Publication of CN101479928B publication Critical patent/CN101479928B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Control Of Ac Motors In General (AREA)

Abstract

本发明提供一种逆变器控制器和用于操作该逆变器控制器的方法,使得在瞬间断电期间或者在再生操作期间能够连续操作,而不要求困难的调节并且在过压或欠压下不引起跳闸或者不必要的转矩脉动。一种配备有用于探测平滑电容器(2)的端子电压的电压探测电路(5)和用于探测AC电源中的瞬间断电的速度指令选择电路(6)的逆变器控制器(20)具有用于计算其功率输出的功率计算电路(36)和用于计算在瞬间断电期间的功率输出目标值和速度指令值的速度指令计算电路(7)。

Figure 200780024437

The present invention provides an inverter controller and a method for operating the inverter controller that enable continuous operation during momentary power outages or during regenerative operation without requiring difficult regulation and during overvoltage or undervoltage Depression does not cause tripping or unnecessary torque ripple. An inverter controller (20) equipped with a voltage detection circuit (5) for detecting a terminal voltage of a smoothing capacitor (2) and a speed command selection circuit (6) for detecting a momentary power failure in an AC power supply has A power calculation circuit (36) for calculating its power output and a speed command calculation circuit (7) for calculating a power output target value and a speed command value during momentary power failure.

Figure 200780024437

Description

逆变器控制器及其操作方法Inverter controller and method of operation thereof

技术领域 technical field

本发明涉及一种用于以变速方式控制AC电机的逆变器控制器,并且更具体地,涉及一种逆变器控制器和用于操作该逆变器控制器的方法,使得在瞬间断电期间能够连续操作并且在AC电机减速期间能够处理再生能量,并且AC电机在再生负载下操作。The present invention relates to an inverter controller for controlling an AC motor in a variable speed manner, and more particularly, to an inverter controller and a method for operating the inverter controller such that the Capable of continuous operation during electrical periods and capable of handling regenerative energy during deceleration of the AC motor, and the AC motor operates under regenerative load.

背景技术 Background technique

在第一传统逆变器控制器的情形中,根据它在瞬间断电期间的操作方法,当平滑电容器的端子电压(中间电压)降低到水平1或者更低时,AC电机被减速,当由于通过减速获得的再生电力,中间电压升高到水平2或者更高时,AC电机加速,并且如上所述随后根据中间电压的升高或者降低而重复加速/减速控制,由此中间电压的下降速率被降低(例如,参考专利文献1)。In the case of the first conventional inverter controller, according to its operation method during momentary power failure, when the terminal voltage (intermediate voltage) of the smoothing capacitor drops to level 1 or lower, the AC motor is decelerated, when due to With regenerative power obtained by deceleration, when the intermediate voltage rises to level 2 or higher, the AC motor accelerates, and then repeats the acceleration/deceleration control according to the increase or decrease of the intermediate voltage as described above, whereby the rate of decrease of the intermediate voltage is reduced (for example, refer to Patent Document 1).

在第二传统逆变器控制器的情形中,逆变器控制器使用断电探测信号而开始减速,基于目标值和DC中间电压的探测值计算减速速率1从而在减速期间DC中间电压变得恒定,基于DC中间电压的变化速率计算减速速率2,并且通过成比例地对通过将这两个减速速率相乘而获得的值积分而控制减速时间,由此当DC中间电压达到在断电探测之前的电压或者在减速期间升高时停止减速(例如,参考专利文献2)。In the case of the second conventional inverter controller, the inverter controller starts deceleration using the power-off detection signal, calculates a deceleration rate 1 based on the target value and the detected value of the DC intermediate voltage so that the DC intermediate voltage becomes Constant, the deceleration rate 2 is calculated based on the rate of change of the DC intermediate voltage, and the deceleration time is controlled by proportionally integrating the value obtained by multiplying these two deceleration rates, whereby when the DC intermediate voltage reaches Deceleration is stopped when the previous voltage or rises during deceleration (for example, refer to Patent Document 2).

在第三传统逆变器控制器的情形中,当输出频率降低并且电机减速时,主电路的电压值(相应于平滑电容器的端子电压值)升高;根据所探测到的主电路的电压值控制电机的减速时间从而当电压探测值高于预定的第一电压值时,减速时间被延长,并且从而当电压探测值达到高于第一电压值的第二电压值时,停止减速(例如,参考专利文献3)。In the case of the third conventional inverter controller, when the output frequency decreases and the motor decelerates, the voltage value of the main circuit (corresponding to the terminal voltage value of the smoothing capacitor) rises; according to the detected voltage value of the main circuit The deceleration time of the motor is controlled so that when the voltage detection value is higher than a predetermined first voltage value, the deceleration time is extended, and thus when the voltage detection value reaches a second voltage value higher than the first voltage value, the deceleration is stopped (for example, Refer to Patent Document 3).

在第四传统逆变器控制器的情形中,当在电机操作期间施加再生负载并且所探测到的DC电压(相应于平滑电容器的端子电压值)超过基准值时,通过将在所探测到的DC电压值和基准值之间的差值乘以常量比例增益而获得将被升高的输出频率,并且执行控制以升高输出频率(例如,参考专利文献4)。In the case of the fourth conventional inverter controller, when the regenerative load is applied during motor operation and the detected DC voltage (corresponding to the terminal voltage value of the smoothing capacitor) exceeds the reference value, by The difference between the DC voltage value and the reference value is multiplied by a constant proportional gain to obtain an output frequency to be raised, and control is performed to raise the output frequency (for example, refer to Patent Document 4).

图8是示出第四传统逆变器控制器的操作的视图,该逆变器控制器用于当例如在其中再生能量在压榨机的下死点处升高的负载条件下使用AC电机时驱动该AC电机。在图中,f表示输出频率、Vdc表示DC母线电压,Vdc0表示DC母线电压失速水平,并且Vdc2表示过压水平。8 is a view showing the operation of a fourth conventional inverter controller for driving when an AC motor is used, for example, under a load condition in which regenerative energy rises at the bottom dead center of the press machine. The AC motor. In the figure, f represents the output frequency, Vdc represents the DC bus voltage, Vdc0 represents the DC bus voltage stall level, and Vdc2 represents the overvoltage level.

当使用减速指令降低输出频率f(在p1处)并且电机减速时,DC母线电压Vdc被来自电机的再生能量升高。当DC母线电压Vdc变成DC母线电压失速水平Vdc0或者更高(在p2和p4处)时,输出频率f被升高以防止过压跳闸。因为输出频率f被升高,再生能量被降低;当DC母线电压Vdc被降低并且变成DC母线电压失速水平Vdc0或者更低(在p3和p5处)时,再次执行减速指令。When the output frequency f is reduced (at p1 ) using the deceleration command and the motor is decelerated, the DC bus voltage Vdc is boosted by regenerative energy from the motor. When the DC bus voltage Vdc becomes the DC bus voltage stall level Vdc0 or higher (at p2 and p4), the output frequency f is raised to prevent overvoltage tripping. Since the output frequency f is raised, regenerative energy is lowered; when the DC bus voltage Vdc is lowered and becomes the DC bus voltage stall level Vdc0 or lower (at p3 and p5), the deceleration command is executed again.

在瞬间断电期间用于传统逆变器控制器的操作方法中,通过调节速度指令或者通过基于平滑电容器的端子电压(中间电压)的水平或者断电探测电路的操作而确定减速速率,为再生操作驱动电机。In the operation method used for conventional inverter controllers during momentary power failure, by adjusting the speed command or by determining the deceleration rate based on the level of the terminal voltage (intermediate voltage) of the smoothing capacitor or the operation of the power failure detection circuit, for regeneration Operate the drive motor.

进而,在当DC母线电压被在AC电机减速和AC电机在再生负载下操作期间的再生能量升高到预定电压或者更高时用于传统逆变器控制器的操作方法中,重复延长减速时间、根据DC母线电压的水平停止减速或者升高输出频率的步骤从而抑制DC母线电压升高,由此防止过压跳闸。Further, in the operation method for the conventional inverter controller when the DC bus voltage is boosted to a predetermined voltage or higher by regenerative energy during deceleration of the AC motor and operation of the AC motor under a regenerative load, the deceleration time is repeatedly extended , Stop the step of decelerating or increasing the output frequency according to the level of the DC bus voltage to suppress the increase of the DC bus voltage, thereby preventing an overvoltage trip.

专利文献1:未审定日本专利申请公开No.Hei 6-165579Patent Document 1: Unexamined Japanese Patent Application Publication No. Hei 6-165579

专利文献2:日本专利No.3201460Patent Document 2: Japanese Patent No. 3201460

专利文献3:日本专利No.3095083Patent Document 3: Japanese Patent No. 3095083

专利文献4:日本专利No.3536695Patent Document 4: Japanese Patent No. 3536695

发明内容 Contents of the invention

本发明所要解决的问题Problem to be solved by the present invention

在用于传统逆变器控制器的操作方法中,探测平滑电容器的端子电压水平,并且根据该电压水平控制减速时间和输出频率;因此,在所述方法被应用于其中被施加到将被驱动的AC电机的负载变化的系统的情形中,难以确定输出频率的控制数量;如果输出频率的变化缓慢,则在欠压或者过压下产生跳闸,或者发生这样的问题,其中减速和加速被重复并且在电机中产生振动。特别地,在所述方法被应用于具有低机械刚度的系统或者设有具有降低的电容的平滑电容器的逆变器控制器的情形中,在DC母线电压(Vpn)中的上/下变化是陡峭的;因此,上述问题显著地发生。In the operation method used for the conventional inverter controller, the terminal voltage level of the smoothing capacitor is detected, and the deceleration time and output frequency are controlled according to the voltage level; In the case of a system where the load of an AC motor changes, it is difficult to determine the control quantity of the output frequency; if the change of the output frequency is slow, a trip occurs under undervoltage or overvoltage, or such a problem occurs in which deceleration and acceleration are repeated And generate vibration in the motor. In particular, in the case where the method is applied to a system with low mechanical stiffness or an inverter controller provided with a smoothing capacitor with reduced capacitance, the up/down variation in the DC bus voltage (Vpn) is steep; thus, the above-mentioned problem occurs significantly.

考虑到这些问题,本发明的一个目的在于提供一种逆变器控制器和一种用于操作逆变器控制器的方法,使得能够连续操作而不要求困难的调节,并且即使在本发明被应用于具有低机械刚度的系统或者设有具有降低的电容的平滑电容器的逆变器控制器的情形中,在瞬间断电期间或者在AC电机减速和AC电机在再生负载下操作期间也不会在过压或者欠压下引起跳闸。In view of these problems, it is an object of the present invention to provide an inverter controller and a method for operating an inverter controller that enable continuous operation without requiring difficult adjustments, and even when the present invention is implemented In the case of being applied to a system with low mechanical rigidity or an inverter controller provided with a smoothing capacitor with reduced capacitance, it will not occur during momentary power failure or during deceleration of the AC motor and operation of the AC motor under a regenerative load Causes a trip on overvoltage or undervoltage.

用于解决所述问题的方法The method used to solve the problem

为了解决上述问题,本发明被如下所述那样进行配置。In order to solve the above-mentioned problems, the present invention is configured as described below.

根据本发明的一个方面,涉及一种逆变器控制器,包括:According to one aspect of the present invention, it relates to an inverter controller, comprising:

作为负载的AC电机,AC motor as load,

整流电路,所述整流电路用于将来自AC电源的AC电力转换成DC电力,a rectification circuit for converting AC power from an AC power source into DC power,

平滑电容器,所述平滑电容器用于平滑来自所述整流电路的DC电压,a smoothing capacitor for smoothing the DC voltage from the rectification circuit,

逆变器电路,所述逆变器电路用于将经由所述平滑电容器供应的DC电力转换成所期望的频率,an inverter circuit for converting the DC power supplied via the smoothing capacitor into a desired frequency,

电流探测电路,所述电流探测电路用于探测来自所述逆变器电路的输出电流,a current detection circuit for detecting an output current from the inverter circuit,

电压探测电路,所述电压探测电路用于探测所述平滑电容器的端子电压Vpn,a voltage detection circuit for detecting the terminal voltage Vpn of the smoothing capacitor,

速度指令计算电路,所述速度指令计算电路计算在判断所述AC电源断电的情况下所使用的断电时间速度指令,a speed command calculation circuit that calculates a power-off time speed command used in a case where the AC power supply is judged to be power-off,

输出电压指令计算电路,所述输出电压指令计算电路基于断电探测信号、通常时间速度指令和断电时间速度指令,计算向所述AC电机的电压指令;an output voltage command calculation circuit that calculates a voltage command to the AC motor based on a power failure detection signal, a normal time speed command, and a power failure time speed command;

其中,所述速度指令计算电路包括:Wherein, the speed command calculation circuit includes:

功率计算电路,利用所述输出电流和所述电压指令来计算功率输出值;a power calculation circuit, using the output current and the voltage command to calculate a power output value;

功率目标计算电路,利用所述端子电压Vpn、预先设定的所述端子电压的断电时目标值Vpnc和所述平滑电容器的电容器电容C,根据(C×Vpnc2)/2来计算功率输出目标值,a power target calculation circuit that calculates a power output based on (C×Vpnc 2 )/2 using the terminal voltage Vpn, a preset target value Vpnc of the terminal voltage at power-off time, and the capacitor capacitance C of the smoothing capacitor target value,

基于所述功率输出目标值和所述功率输出值来计算所述断电时间速度指令。The power-off time speed command is calculated based on the power output target value and the power output value.

根据本发明的一个方面,涉及一种逆变器控制器,包括:According to one aspect of the present invention, it relates to an inverter controller, comprising:

作为负载的AC电机,AC motor as load,

整流电路,所述整流电路用于将来自AC电源的AC电力转换成DC电力,a rectification circuit for converting AC power from an AC power source into DC power,

平滑电容器,所述平滑电容器用于平滑来自所述整流电路的DC电压,a smoothing capacitor for smoothing the DC voltage from the rectification circuit,

逆变器电路,所述逆变器电路用于将经由所述平滑电容器供应的DC电力转换成所期望的频率,an inverter circuit for converting the DC power supplied via the smoothing capacitor into a desired frequency,

电流探测电路,所述电流探测电路用于探测来自所述逆变器电路的输出电流,a current detection circuit for detecting an output current from the inverter circuit,

电压探测电路,所述电压探测电路用于探测所述平滑电容器的端子电压Vpn,a voltage detection circuit for detecting the terminal voltage Vpn of the smoothing capacitor,

频率指令计算电路,所述频率指令计算电路用于计算在所述端子电压Vpn在设定值以上的情况下所使用的频率指令,a frequency command calculation circuit for calculating a frequency command used when the terminal voltage Vpn is equal to or greater than a set value,

输出电压指令计算电路,所述输出电压指令计算电路用于基于所述端子电压Vpn是否在设定值以上、通常时间频率指令、和在所述端子电压Vpn在设定值以上的情况下所使用的所述频率指令,来计算向所述AC电机的电压指令,an output voltage command calculation circuit for use based on whether or not the terminal voltage Vpn is above a set value, a normal time frequency command, and when the terminal voltage Vpn is above a set value of the frequency command to calculate a voltage command to the AC motor,

其中,所述频率指令计算电路包括:Wherein, the frequency command calculation circuit includes:

功率计算电路,利用所述输出电流和所述电压指令来计算功率输出值;a power calculation circuit, using the output current and the voltage command to calculate a power output value;

功率目标计算电路,利用所述端子电压Vpn、预先设定的所述端子电压的防止过电压操作时的目标值Vpnc和所述平滑电容器的电容器电容C,根据(C×Vpnc2)/2来计算功率输出目标值,The power target calculation circuit uses the terminal voltage Vpn, a preset target value Vpnc of the terminal voltage at the time of overvoltage prevention operation, and the capacitor capacitance C of the smoothing capacitor, according to (C×Vpnc 2 )/2 Calculate the power output target value,

基于所述功率输出目标值和所述功率输出值来计算所述频率指令。The frequency command is calculated based on the power output target value and the power output value.

根据本发明的另外一个方面,涉及一种用于解决用于逆变器控制器的AC电源的波动或者瞬间断电的操作方法,所述逆变器控制器包括:According to another aspect of the present invention, it relates to an operation method for solving fluctuations or momentary power failures of AC power for an inverter controller, the inverter controller comprising:

作为负载的AC电机;AC motor as load;

用于将来自AC电源的AC电力转换成DC电力的整流电路;A rectification circuit for converting AC power from an AC power source into DC power;

用于平滑来自所述整流电路的DC电压的平滑电容器;a smoothing capacitor for smoothing the DC voltage from the rectification circuit;

用于将经由所述平滑电容器供应的DC电力转换成所期望的频率的逆变器电路;an inverter circuit for converting DC power supplied via the smoothing capacitor into a desired frequency;

用于探测所述逆变器的输出电流的电流探测电路;a current detection circuit for detecting the output current of the inverter;

和用于探测所述平滑电容器的端子电压Vpn的电压探测电路;and a voltage detection circuit for detecting a terminal voltage Vpn of the smoothing capacitor;

速度指令计算电路,所述速度指令计算电路计算在判断所述AC电源断电的情况下所使用的断电时间速度指令,a speed command calculation circuit that calculates a power-off time speed command used in a case where the AC power supply is judged to be power-off,

输出电压指令计算电路,所述输出电压指令计算电路基于断电探测信号、通常时间速度指令和断电时间速度指令,计算向所述AC电机的电压指令;an output voltage command calculation circuit that calculates a voltage command to the AC motor based on a power failure detection signal, a normal time speed command, and a power failure time speed command;

所述操作方法包括以下步骤:The method of operation comprises the following steps:

利用所述输出电流和所述电压指令来计算功率输出值;calculating a power output value by using the output current and the voltage command;

利用所述端子电压Vpn、预先设定的所述端子电压的断电时目标值Vpnc和所述平滑电容器的电容器电容C,根据(C×Vpnc2)/2来计算功率输出目标值;Using the terminal voltage Vpn, the preset target value Vpnc of the terminal voltage at power-off time, and the capacitor capacitance C of the smoothing capacitor, the power output target value is calculated according to (C×Vpnc 2 )/2;

基于所述功率输出目标值和所述功率输出值来计算所述断电时间速度指令。The power-off time speed command is calculated based on the power output target value and the power output value.

本发明的效果Effect of the present invention

利用本发明,Utilize the present invention,

能够基于沿着平滑电容器2的端子的目标电压和探测电压确定减速指令的回路内部配置用于控制逆变器控制器的功率输出的回路,并且平滑电容器的端子电压的目标值能够被快速地收敛。A loop for controlling the power output of the inverter controller is configured inside a loop capable of determining a deceleration command based on the target voltage and the detected voltage along the terminals of the smoothing capacitor 2, and the target value of the terminal voltage of the smoothing capacitor can be rapidly converged .

进而,利用本发明,能够对逆变器控制器的功率损耗值加以考虑,并且利用本发明,能够对包括AC电机的机器的功率损耗值加以考虑;因此,即使在其中沿着平滑电容器的端子的目标电压和探测电压彼此一致的状态中,也能够执行平滑的减速操作,而且不必要的减速停止和减速不被重复。Furthermore, with the present invention, the power loss value of the inverter controller can be considered, and with the present invention, the power loss value of the machine including the AC motor can be considered; therefore, even in it along the terminals of the smoothing capacitor Even in a state where the target voltage and the detection voltage of the target voltage coincide with each other, smooth deceleration operation can be performed, and unnecessary deceleration stops and decelerations are not repeated.

而且,利用本发明,通过限制转矩目标值,能够防止产生过大转矩,由此能够保护所被使用的机器。Furthermore, with the present invention, by limiting the torque target value, excessive torque can be prevented from being generated, thereby enabling the protection of the machine used.

进一步,利用本发明,在其中用作被使用负载的AC电机是感应电机的情形中,能够补偿差频,由此能够缩短在直至获得计划再生电力之前的延迟时间。Further, with the present invention, in the case where the AC motor serving as the used load is an induction motor, the difference frequency can be compensated, whereby the delay time until scheduled regenerative power is obtained can be shortened.

附图说明 Description of drawings

图1是示出根据本发明的第一实施例的逆变器控制器整体的概略配置图表;FIG. 1 is a schematic configuration diagram showing the whole of an inverter controller according to a first embodiment of the present invention;

图2是根据本发明的第一实施例用于在断电探测期间选择速度指令的速度指令选择电路6的框图;2 is a block diagram of a speed command selection circuit 6 for selecting a speed command during power failure detection according to a first embodiment of the present invention;

图3是根据本发明的第一实施例的速度指令计算电路7的框图;FIG. 3 is a block diagram of a speed command calculation circuit 7 according to a first embodiment of the present invention;

图4是在断电发生时的时序图;Figure 4 is a timing diagram when a power outage occurs;

图5是示出根据本发明的第二实施例的逆变器控制器整体的概略配置图表;5 is a schematic configuration diagram showing the whole of an inverter controller according to a second embodiment of the present invention;

图6是根据本发明的第二实施例的时序电路70的框图;FIG. 6 is a block diagram of a sequential circuit 70 according to a second embodiment of the present invention;

图7是根据本发明的第二实施例的频率指令计算电路71的框图;和FIG. 7 is a block diagram of a frequency command calculation circuit 71 according to a second embodiment of the present invention; and

图8是示意现有技术的操作的时序图。FIG. 8 is a timing chart illustrating the operation of the related art.

附图标记reference sign

1  整流电路1 rectifier circuit

2  平滑电容器2 smoothing capacitor

3  逆变器电路3 inverter circuit

4  电流探测电路4 Current detection circuit

5  电压探测电路5 voltage detection circuit

6  速度指令选择电路6 Speed command selection circuit

7  速度指令计算电路7 Speed command calculation circuit

8  电压指令计算电路8 Voltage command calculation circuit

9  PWM控制电路9 PWM control circuit

10 基极驱动电路10 base drive circuit

11 电磁接触器11 Electromagnetic contactor

12 速度指令设置器12 Speed command setter

13  AC电机13 AC motors

20,20’  逆变器控制器20, 20’ inverter controller

21  开关电路21 switch circuit

22  软起动器22 soft starter

23  OR电路23 OR circuit

24  比较器24 Comparators

25、31、32、61、62、63  系数乘法器25, 31, 32, 61, 62, 63 Coefficient multipliers

34  能量目标值计算电路34 Energy target value calculation circuit

35  能量计算电路35 Energy Calculation Circuit

36  功率计算电路36 power calculation circuit

37、60  减法器37, 60 Subtractor

40  加法器-减法器40 Adder-subtractor

49  延迟电路49 delay circuit

52  除法器52 Divider

53  转矩限制电路53 Torque limit circuit

58  差频计算电路58 difference frequency calculation circuit

59、64  加法器59, 64 adder

70  时序电路70 sequential circuit

71  频率指令计算电路71 Frequency instruction calculation circuit

72  频率指令设置器72 Frequency command setter

73  开关电路73 switch circuit

74  比较器74 Comparator

75、76、77、82、85、88  系数乘法器75, 76, 77, 82, 85, 88 coefficient multiplier

78  能量目标值计算电路78 Energy target value calculation circuit

79  能量计算电路79 Energy Calculation Circuit

80、91  减法器80, 91 Subtractor

81  功率计算电路81 power calculation circuit

83  限制电路83 Limiting circuit

84  加法器-减法器84 Adder-subtractor

86  除法器86 divider

87  转矩限制电路87 Torque limit circuit

89、90  加法器89, 90 adder

92  差频计算电路92 difference frequency calculation circuit

93  延迟电路93 delay circuit

a   断电探测接触信号a power failure detection contact signal

b   断电时间速度指令b power-off time speed command

c   速度指令c speed command

d   输出电压指令d output voltage command

e   输出电流探测e output current detection

f   断电探测信号f power failure detection signal

g   通常时间速度指令g Usually time speed command

具体实施方式 Detailed ways

将基于附图描述根据本发明的实施例和根据本发明的方法的具体实例。Embodiments according to the present invention and specific examples of the method according to the present invention will be described based on the drawings.

实施例1Example 1

图1是示出根据本发明的逆变器控制器整体的概略配置图表。在图1中,数字1代表用于将来自AC电源的AC电力转换成DC电力的整流电路,数字2代表用于平滑来自整流电路1的DC电压的平滑电容器,数字3代表用于将经由平滑电容器2供应的DC电力转换成所期望的频率的逆变器电路3,数字4代表用于探测逆变器电路的输出电流的电流探测电路,数字5代表用于探测平滑电容器2的端子电压的电压探测电路,数字6代表用于根据断电状态是否已经发生而选择速度指令的速度指令选择电路,数字7代表用于在断电探测期间计算速度指令的速度指令计算电路,数字8代表用于基于从速度指令选择电路6发出的速度指令而计算输出电压指令的输出电压指令计算电路,数字9代表用于基于从速度指令选择电路6发出的输出信号而PWM控制逆变器电路3的PWM控制电路,并且数字10代表用于基于来自PWM控制电路9的输出信号而驱动逆变器电路3的基极驱动电路;逆变器控制器包括这些构件。FIG. 1 is a schematic configuration diagram showing the whole of an inverter controller according to the present invention. In Fig. 1, numeral 1 represents a rectifying circuit for converting AC power from an AC power source into DC power, numeral 2 represents a smoothing capacitor for smoothing the DC voltage from rectifying circuit 1, and numeral 3 represents a The DC power supplied by the capacitor 2 is converted into an inverter circuit 3 of a desired frequency, numeral 4 represents a current detection circuit for detecting an output current of the inverter circuit, and numeral 5 represents a circuit for detecting a terminal voltage of the smoothing capacitor 2 A voltage detection circuit, numeral 6 represents a speed command selection circuit for selecting a speed command according to whether a power-off state has occurred, numeral 7 represents a speed command calculation circuit for calculating a speed command during power-off detection, and numeral 8 for An output voltage command calculation circuit that calculates an output voltage command based on a speed command issued from the speed command selection circuit 6, numeral 9 denotes a PWM control for PWM-controlling the inverter circuit 3 based on an output signal from the speed command selection circuit 6 circuit, and numeral 10 denotes a base drive circuit for driving the inverter circuit 3 based on an output signal from the PWM control circuit 9; the inverter controller includes these components.

数字11代表AC电源侧上的电磁接触器,数字12代表用于设定通常操作期间的速度指令的速度指令设置器,并且数字13代表通过逆变器电路3的输出驱动的AC电机;这些构件被连接到逆变器控制器20。Numeral 11 denotes an electromagnetic contactor on the AC power supply side, numeral 12 denotes a speed command setter for setting a speed command during normal operation, and numeral 13 denotes an AC motor driven by the output of the inverter circuit 3; these members is connected to the inverter controller 20.

本发明不同于现有技术之处在于,提供用于根据断电状态是否已经发生而选择速度指令的速度指令选择电路6和用于计算断电时间速度指令的速度指令计算电路7;速度指令计算电路7在用于基于平滑电容器2的目标电压Vpnc和探测电压Vpn确定减速指令的回路内部设有用于控制逆变器控制器20的功率输出的回路,并且进一步设有用于限制转矩目标值的转矩限制电路53和其它电路。The present invention is different from the prior art in that it provides a speed command selection circuit 6 for selecting a speed command according to whether a power-off state has occurred and a speed command calculation circuit 7 for calculating a power-off time speed command; The circuit 7 is provided with a loop for controlling the power output of the inverter controller 20 inside a loop for determining a deceleration command based on the target voltage Vpnc and the detected voltage Vpn of the smoothing capacitor 2, and is further provided with a circuit for limiting the torque target value. Torque limiting circuit 53 and other circuits.

图2是用于根据断电状态是否已经发生而选择速度指令的速度指令选择电路6的框图。在图2中,速度指令选择电路6具有用于设定UV水平1的开关电路21、软起动器22、OR电路23、比较器24和系数乘法器25、将OR电路23的输出信号发送到速度指令计算电路7,该OR电路23用于计算来自电磁接触器11的断电探测接触信号和作为断电探测信号的在以后描述的比较器24的输出信号的逻辑OR,并且,进一步向速度指令计算电路7和电压指令计算电路8发送速度指令,通过启动开关电路21并且通过经由软起动器22在速度指令计算电路7的断电时间速度指令和来自速度指令设置器12的通常时间速度指令之间进行切换而选择所述速度指令。FIG. 2 is a block diagram of a speed command selection circuit 6 for selecting a speed command according to whether a power-off state has occurred. In Fig. 2, the speed command selection circuit 6 has a switch circuit 21 for setting UV level 1, a soft starter 22, an OR circuit 23, a comparator 24 and a coefficient multiplier 25, and the output signal of the OR circuit 23 is sent to The speed instruction calculation circuit 7, the OR circuit 23 is used to calculate the logic OR of the power-off detection contact signal from the electromagnetic contactor 11 and the output signal of the comparator 24 described later as the power-off detection signal, and, further, to the speed The command calculation circuit 7 and the voltage command calculation circuit 8 send the speed command by starting the switch circuit 21 and by passing through the soft starter 22 at the power-off time speed command of the speed command calculation circuit 7 and the normal time speed command from the speed command setter 12 Switch between and select the speed command.

比较器24比较来自电压探测电路5的平滑电容器2的端子电压Vpn与系数乘法器25的输出,并且当端子电压Vpn低于系数乘法器25的输出时,比较器24输出UV(欠压)信号“1”。The comparator 24 compares the terminal voltage Vpn of the smoothing capacitor 2 from the voltage detection circuit 5 with the output of the coefficient multiplier 25, and when the terminal voltage Vpn is lower than the output of the coefficient multiplier 25, the comparator 24 outputs a UV (undervoltage) signal "1".

图3是用于计算断电时间速度指令的速度指令计算电路7的框图。在图3中,速度指令计算电路7具有用于设定平滑电容器2的端子上的目标电压Vpnc和平滑电容器2的电容C的系数乘法器31和32、用于计算在平滑电容器2中存储的能量的目标值的能量目标值计算电路34、用于计算在平滑电容器2中存储的能量的能量计算电路35、功率计算电路36、减法器37、加法器-减法器40、延迟电路49、除法器52、转矩限制电路53、差频计算电路58、加法器59、减法器60、系数乘法器61、62和63以及加法器64;能量目标值计算电路34使用系数乘法器31和32的输出计算(C×Vpnc2)/2,并且能量计算电路35使用系数乘法器31的输出和从电压探测电路5发送的平滑电容器2的端子电压Vpc计算(C×Vpn2)/2,并且功率计算电路36基于在电流探测电路4处获得的逆变器输出电流探测值和从电压指令计算电路8发送的电压指令值计算功率输出P。FIG. 3 is a block diagram of a speed command calculation circuit 7 for calculating a power-off time speed command. In FIG. 3, the speed command calculation circuit 7 has coefficient multipliers 31 and 32 for setting the target voltage Vpnc on the terminal of the smoothing capacitor 2 and the capacitance C of the smoothing capacitor 2, and for calculating the value stored in the smoothing capacitor 2. Energy target value calculation circuit 34 of target value of energy, energy calculation circuit 35 for calculating energy stored in smoothing capacitor 2, power calculation circuit 36, subtractor 37, adder-subtractor 40, delay circuit 49, division device 52, torque limiting circuit 53, difference frequency calculation circuit 58, adder 59, subtractor 60, coefficient multipliers 61, 62 and 63, and adder 64; energy target value calculation circuit 34 uses coefficient multipliers 31 and 32 The output is calculated by (C×Vpnc 2 )/2, and the energy calculation circuit 35 calculates (C×Vpn 2 )/2 using the output of the coefficient multiplier 31 and the terminal voltage Vpc of the smoothing capacitor 2 sent from the voltage detection circuit 5, and the power The calculation circuit 36 calculates the power output P based on the inverter output current detection value obtained at the current detection circuit 4 and the voltage command value sent from the voltage command calculation circuit 8 .

在系数乘法器61中设定用于使得从能量目标值计算电路34和能量计算电路35发送的存储能量的目标值和当前值彼此一致的比例增益,并且系数乘法器61的输出变成功率输出目标值Pref。在系数乘法器62中设定在包括逆变器控制器20和AC电机13的机器中的功率损耗的总值,并且在系数乘法器63中设定相应于用以将转矩转换成加速值的系数的增益,通过使用包括AC电机13的整个负载的惯性矩J的倒数作为指导而获得所述转矩。A proportional gain for making the target value of stored energy sent from the energy target value calculation circuit 34 and the energy calculation circuit 35 coincide with each other and the current value is set in the coefficient multiplier 61, and the output of the coefficient multiplier 61 becomes a power output Target value Pref. The total value of the power loss in the machine including the inverter controller 20 and the AC motor 13 is set in the coefficient multiplier 62, and the value corresponding to the torque used to convert the torque into an acceleration value is set in the coefficient multiplier 63. The torque is obtained by using the inverse of the moment of inertia J of the entire load including the AC motor 13 as a guideline.

下面,将描述在速度指令计算电路7中用于计算断电时间速度指令的操作。Next, the operation for calculating the power-off time speed command in the speed command calculation circuit 7 will be described.

使用减法器37获得在上述存储能量的目标值(C×Vpnc2)/2和当前值之间的差值,将该差值乘以增益以获得功率输出目标值Pref。使用加法器-减法器40利用在包括逆变器控制器20和AC电机13的机器中的功率损耗值校正这个功率输出目标值Pref,并且通过功率计算电路36的计算获得在该校正值和功率输出P之间的差值。使用除法器52将该差值除以AC电机13的速度信息ωr^以获得转矩目标值Tref。使用转矩限制电路53限制该转矩目标值Tref,使用在系数乘法器63中设定的增益将其转换成加速指令并且使用加法器54将其增加到当前速度指令ωr^以获得断电时间速度指令。The difference between the above-mentioned target value (C×Vpnc 2 )/2 of stored energy and the current value is obtained using the subtractor 37, and the difference is multiplied by a gain to obtain the power output target value Pref. This power output target value Pref is corrected using the power loss value in the machine including the inverter controller 20 and the AC motor 13 using the adder-subtractor 40, and the correction value and the power are obtained by calculation of the power calculation circuit 36. Output the difference between P. The difference is divided by the speed information ωr^ of the AC motor 13 using the divider 52 to obtain the torque target value Tref. This torque target value Tref is limited using the torque limiting circuit 53, converted into an acceleration command using the gain set in the coefficient multiplier 63 and added to the current speed command ωr^ using the adder 54 to obtain the power-off time speed command.

虽然在上述说明中,在系数乘法器62中将包括逆变器控制器20和AC电机13的机器的功率损耗值设为设定值,但是该功率损耗值可以被严格地表示成逆变器的输出电流等的函数并且被结合。Although in the above description, the power loss value of the machine including the inverter controller 20 and the AC motor 13 is set as a set value in the coefficient multiplier 62, the power loss value may be strictly expressed as the inverter function of the output current etc. and are combined.

进而,在所用电机是感应电机的情形中,还可能的是,使用转矩限制电路53的输出值利用差频计算电路58计算差频,使用加法器59和减法器60对速度指令进行差频补偿,并且速度指令计算电路7的输入/输出速度指令被用作感应电机的基本频率指令从而直至获得计划再生电力之前的延迟时间被缩短。Furthermore, in the case where the motor used is an induction motor, it is also possible to calculate the difference frequency with the difference frequency calculation circuit 58 using the output value of the torque limiter circuit 53, and use the adder 59 and the subtractor 60 to calculate the difference frequency for the speed command. compensation, and the input/output speed command of the speed command calculation circuit 7 is used as the basic frequency command of the induction motor so that the delay time until the planned regenerative power is obtained is shortened.

而且,虽然使用最后一次输出的速度指令获得AC电机13的速度信息ωr^,在结合用于探测或者估计速度的电路的情形中,还可以使用速度的探测值或者估计值。Also, although the speed information ωr of the AC motor 13 is obtained using the speed command output last time, in the case of incorporating a circuit for detecting or estimating the speed, a detected or estimated value of the speed may also be used.

虽然全部考虑了在逆变器控制器20中的功率损耗、在包括AC电机13的机器中的功率损耗以及在所用电机是感应电机的情形中对差频的补偿,从而实现了所述配置,但是这些考虑中的任何一个或者多个考虑的任何组合均可被添加。即使在这种情形中,各个效果也保持不变。Although the configuration is realized taking into account the power loss in the inverter controller 20, the power loss in the machine comprising the AC motor 13 and the compensation of the difference frequency in the case where the motor used is an induction motor, But any one or any combination of more of these considerations may be added. Even in this case, the respective effects remain unchanged.

如上所述,在用以基于平滑电容器2的目标电压Vpnc和探测电压Vpn确定减速指令的回路内部形成用于控制逆变器控制器20的功率输出的回路以控制平滑电容器2的端子电压;进而,考虑到包括逆变器控制器20和AC电机13的机器的功率损耗值计算功率输出目标值,并且使用转矩限制电路53限制转矩目标值。As described above, a loop for controlling the power output of the inverter controller 20 to control the terminal voltage of the smoothing capacitor 2 is formed inside the loop for determining the deceleration command based on the target voltage Vpnc and the detected voltage Vpn of the smoothing capacitor 2; and , the power output target value is calculated in consideration of the power loss value of the machine including the inverter controller 20 and the AC motor 13 , and the torque target value is limited using the torque limit circuit 53 .

利用上述操作,平滑电容器2的端子电压能够快速收敛到目标值;即使在平滑电容器2的目标电压和探测电压彼此一致的状态中,也能够执行平滑减速操作,而且不必要的减速停止和减速不被重复。进而,因为能够防止产生过大转矩,所以能够保护所被使用的机器。With the above operation, the terminal voltage of the smoothing capacitor 2 can quickly converge to the target value; even in a state where the target voltage of the smoothing capacitor 2 and the detected voltage coincide with each other, smooth deceleration operation can be performed, and unnecessary deceleration stops and deceleration does not occur. is repeated. Furthermore, since excessive torque can be prevented from being generated, the equipment used can be protected.

下面,将使用图1、2和3和图4(发生断电时的时序图),描述在根据这个实施例的逆变器控制器20中在断电探测期间的继续操作。Next, using FIGS. 1 , 2 and 3 and FIG. 4 (timing chart when power failure occurs), continued operation during power failure detection in the inverter controller 20 according to this embodiment will be described.

图4(a)示出AC电源的接通/断开状态,图4(b)示出断电探测触点的打开/关闭状态,并且图4(c)示出操作指令的状态,图4(d)示出在平滑电容器2的端子电压Vpn中的变化,并且图4(f)示出逆变器控制器20的速度指令。Fig. 4(a) shows the on/off state of the AC power supply, Fig. 4(b) shows the on/off state of the power failure detection contact, and Fig. 4(c) shows the state of the operation command, Fig. 4 (d) shows changes in the terminal voltage Vpn of the smoothing capacitor 2 , and FIG. 4( f ) shows the speed command of the inverter controller 20 .

如果在AC电源中发生瞬间断电,则使用电压探测电路5探测的平滑电容器2的端子电压Vpn下降至欠压探测水平1(UV水平1)或者更低,或者电磁接触器11打开。在压降或者打开操作(无论哪一个更早)的时刻探测到断电。当探测到断电时,速度指令选择电路6使用开关电路21将速度指令从通常时间速度指令切换到断电时间速度指令。If a momentary power failure occurs in the AC power supply, the terminal voltage Vpn of the smoothing capacitor 2 detected using the voltage detection circuit 5 falls to undervoltage detection level 1 (UV level 1) or lower, or the electromagnetic contactor 11 opens. Power failure is detected at the moment of voltage drop or open operation (whichever is earlier). When a power outage is detected, the speed command selection circuit 6 switches the speed command from the normal time speed command to the power off time speed command using the switch circuit 21 .

因为平滑电容器2的端子电压Vpn由于断电变得低于系数乘法器31的预设值,即,目标电压Vpnc,所以使用速度指令计算电路7计算的断电时间速度指令被发出以执行减速,并且AC电机13开始减速;依赖于减速速率和负载的惯性矩J的再生能量经由逆变器电路3对平滑电容器2充电并且升高端子电压Vpn。此时,严格来说,存在相应于逆变器控制器20中的功率损耗和包括AC电机13的机器中的功率损耗的降低。Since the terminal voltage Vpn of the smoothing capacitor 2 becomes lower than the preset value of the coefficient multiplier 31, that is, the target voltage Vpnc due to power-off, a power-off time speed command calculated using the speed command calculation circuit 7 is issued to perform deceleration, And the AC motor 13 starts to decelerate; the regenerative energy depending on the deceleration rate and the moment of inertia J of the load charges the smoothing capacitor 2 via the inverter circuit 3 and raises the terminal voltage Vpn. At this time, strictly speaking, there is a reduction corresponding to the power loss in the inverter controller 20 and the power loss in the machine including the AC motor 13 .

在另一方面,当断电探测信号,即OR电路23的输出信号变成“1”时,速度指令选择电路6向速度指令计算电路7发出断电信号。速度指令计算电路7通过执行上述计算操作而计算断电时间速度指令,将速度指令发送到电压指令计算电路8以减速AC电机13。On the other hand, the speed command selection circuit 6 sends a power-off signal to the speed command calculation circuit 7 when the power-off detection signal, that is, the output signal of the OR circuit 23, becomes "1". The speed command calculation circuit 7 calculates the power-off time speed command by performing the above calculation operation, sends the speed command to the voltage command calculation circuit 8 to decelerate the AC motor 13 .

进而,在减速速率缓和并且平滑电容器2的端子电压Vpn变得低于目标电压Vpnc的情形中,或者相反,在端子电压Vpn变得更高的情形中,在功率输出目标值Pref和功率输出P之间产生偏差;基于该偏差快速地控制速度指令,并且控制执行为使得端子电压Vpn变得与目标电压Vpnc一致。Furthermore, in the case where the deceleration rate is moderate and the terminal voltage Vpn of the smoothing capacitor 2 becomes lower than the target voltage Vpnc, or conversely, in the case where the terminal voltage Vpn becomes higher, the power output target value Pref and the power output P A deviation is generated between them; the speed command is quickly controlled based on the deviation, and the control is performed so that the terminal voltage Vpn becomes equal to the target voltage Vpnc.

如果在AC电机13减速和停止之前,AC电源的瞬间断电被恢复,则平滑电容器2的端子电压Vpn升高到欠压探测水平1(UV水平1)或者更高,电磁接触器11被关闭,在图2中示出的断电探测信号变成“0”并且速度指令被切换成用于通常操作的速度指令;因此,直至达到速度指令设定值之前,在占用为通常操作所需要的加速/减速时间时执行加速或者减速。If the momentary power failure of the AC power supply is recovered before the AC motor 13 decelerates and stops, the terminal voltage Vpn of the smoothing capacitor 2 rises to the undervoltage detection level 1 (UV level 1) or higher, and the electromagnetic contactor 11 is turned off , the power-off detection signal shown in Fig. 2 becomes "0" and the speed command is switched to the speed command for normal operation; Acceleration or deceleration is performed during the acceleration/deceleration time.

利用上述配置,当在AC电源中发生瞬间断电时,选择断电时间速度指令,执行减速操作,并且由该操作产生的再生能量对平滑电容器2充电并且升高端子电压Vpn;因此,AC电机13被减速并且能够被连续地操作直至它停止,同时防止电压变低;当AC电源的瞬间断电被恢复时,速度指令被切换成用于通常操作的速度指令,由此发出在占用为通常操作所需要的加速/减速时间时执行加速或者减速的速度指令,直至达到速度指令设定值;结果,即使发生瞬间断电,也能够稳定地继续操作。With the above configuration, when a momentary power failure occurs in the AC power supply, the power failure time speed command is selected, the deceleration operation is performed, and the regenerative energy generated by this operation charges the smoothing capacitor 2 and raises the terminal voltage Vpn; therefore, the AC motor 13 is decelerated and can be continuously operated until it stops while preventing the voltage from becoming low; when the momentary power failure of the AC power supply is restored, the speed command is switched to the speed command for normal operation, thereby issuing The speed command for acceleration or deceleration is executed while operating the required acceleration/deceleration time until the speed command set value is reached; as a result, operation can be continued stably even if a momentary power failure occurs.

将参考附图在下面描述根据本发明的第二实施例。A second embodiment according to the present invention will be described below with reference to the drawings.

实施例2Example 2

图5是示出根据本发明的实施例2的逆变器控制器20’整体的概略配置图表。在图5中,数字1代表整流电路,数字2代表平滑电容器,数字3代表逆变器电路,数字4代表电流探测电路,数字5代表电压探测电路,数字8代表电压指令计算电路,数字9代表PWM控制电路,并且数字10代表基极驱动电路;这些电路执行与图1所示逆变器控制器20的电路的操作类似的操作;数字81代表用于计算逆变器的功率输出的功率计算电路,数字71代表用以基于电压探测电路5和功率计算电路81的输出计算频率指令2(fref2)的频率指令计算电路,并且数字70代表用于对电压探测电路5的输出已经超过基准值进行探测并且用于将频率指令计算电路71的输出(fref2)设为频率指令(fref)的时序电路。Fig. 5 is a schematic configuration diagram showing the whole of an inverter controller 20' according to Embodiment 2 of the present invention. In Figure 5, numeral 1 represents the rectifier circuit, numeral 2 represents the smoothing capacitor, numeral 3 represents the inverter circuit, numeral 4 represents the current detection circuit, numeral 5 represents the voltage detection circuit, numeral 8 represents the voltage command calculation circuit, and numeral 9 represents the PWM control circuit, and numeral 10 represents a base drive circuit; these circuits perform operations similar to those of the circuit of the inverter controller 20 shown in FIG. 1 ; numeral 81 represents a power calculation for calculating the power output of the inverter circuit, numeral 71 represents a frequency command calculation circuit for calculating frequency command 2 (fref2) based on the outputs of voltage detection circuit 5 and power calculation circuit 81, and numeral 70 represents a circuit for checking that the output of voltage detection circuit 5 has exceeded the reference value. A sequential circuit is detected and used to set the output (fref2) of the frequency command calculation circuit 71 as the frequency command (fref).

进而,数字72代表用于输出用作在通常操作期间的频率指令的频率指令1(fref1)的频率指令设置器,并且数字13代表用作负载的AC电机(在以后被描述成感应电机)。频率指令设置器72结合有用于将频率指令转换成具有加速/减速速率的指令的软启动功能。Further, numeral 72 denotes a frequency command setter for outputting a frequency command 1 (fref1) serving as a frequency command during normal operation, and numeral 13 denotes an AC motor (hereinafter described as an induction motor) serving as a load. The frequency command setter 72 incorporates a soft start function for converting the frequency command into a command with an acceleration/deceleration rate.

本发明不同于现有技术之处在于本发明设有时序电路70和频率指令计算电路71;频率指令计算电路71在用以基于平滑电容器2的目标电压Vpnc和探测电压Vpn确定减速指令的回路内部设有用于控制逆变器控制器20’的功率输出的回路,并且还设有用于限制转矩目标值的转矩限制电路87。The present invention is different from the prior art in that the present invention is provided with a sequence circuit 70 and a frequency command calculation circuit 71; the frequency command calculation circuit 71 is inside a loop for determining a deceleration command based on the target voltage Vpnc and the detection voltage Vpn of the smoothing capacitor 2 There is a loop for controlling the power output of the inverter controller 20', and a torque limiting circuit 87 for limiting the torque target value is also provided.

图6是时序电路70的框图。在图6中,数字73代表开关电路,数字74代表比较器,并且数字75代表系数乘法器。FIG. 6 is a block diagram of the sequential circuit 70 . In FIG. 6, numeral 73 represents a switch circuit, numeral 74 represents a comparator, and numeral 75 represents a coefficient multiplier.

基于平滑电容器的端子电压,系数乘法器75设定用于确定通常操作或者防过压操作被执行的阀值。这个设定值是比在通常操作期间能够获得的平滑电容器的端子电压值更大的值。Based on the terminal voltage of the smoothing capacitor, the coefficient multiplier 75 sets a threshold value for determining whether a normal operation or an overvoltage prevention operation is performed. This set value is a value larger than the terminal voltage value of the smoothing capacitor that can be obtained during normal operation.

图7是频率指令计算电路71的框图。在图7中,数字76和77代表系数乘法器,数字78代表能量目标值计算电路,数字79代表能量计算电路,数字80代表减法器,数字81代表功率计算电路,数字82代表系数乘法器,数字83代表限制电路,数字84代表加法器-减法器,数字85代表系数乘法器,数字86代表除法器,数字87代表转矩限制电路,数字88代表系数乘法器,数字89和90代表加法器,数字91代表减法器,数字92代表差频计算单元,并且数字93代表延迟电路。FIG. 7 is a block diagram of a frequency command calculation circuit 71 . In Fig. 7, numerals 76 and 77 represent coefficient multipliers, numeral 78 represents an energy target value calculation circuit, numeral 79 represents an energy calculation circuit, numeral 80 represents a subtractor, numeral 81 represents a power calculation circuit, and numeral 82 represents a coefficient multiplier, The number 83 represents the limiting circuit, the number 84 represents the adder-subtractor, the number 85 represents the coefficient multiplier, the number 86 represents the divider, the number 87 represents the torque limiting circuit, the number 88 represents the coefficient multiplier, and the numbers 89 and 90 represent the adder , numeral 91 represents a subtractor, numeral 92 represents a difference frequency calculation unit, and numeral 93 represents a delay circuit.

在该图中,在系数乘法器76中设定平滑电容器2的端子电压的目标值Vpnc,在系数乘法器77中设定平滑电容器2的电容C,在系数乘法器82中设定用于将减法器80的输出值控制为零的控制增益,在系数乘法器85中设定在逆变器控制器20’中的损耗值和在包括AC电机13的机器中的损耗值的总值,并且在系数乘法器88中设定1/J(J是包括AC电机13的整个负载的惯性矩)。In this figure, the target value Vpnc of the terminal voltage of the smoothing capacitor 2 is set in the coefficient multiplier 76, the capacitance C of the smoothing capacitor 2 is set in the coefficient multiplier 77, and the target value Vpnc for the smoothing capacitor 2 is set in the coefficient multiplier 82. The output value of the subtractor 80 is controlled to a control gain of zero, the sum of the loss value in the inverter controller 20' and the loss value in the machine including the AC motor 13 is set in the coefficient multiplier 85, and 1/J (J is the moment of inertia of the entire load including the AC motor 13 ) is set in the coefficient multiplier 88 .

另外,等于或者大于平滑电容器的端子电压的基准值的值(系数乘法器75的设定值)被设为Vpnc(系数乘法器76的设定值)。In addition, a value equal to or greater than the reference value of the terminal voltage of the smoothing capacitor (the setting value of the coefficient multiplier 75 ) is set as Vpnc (the setting value of the coefficient multiplier 76 ).

将使用图5到7描述根据本发明的逆变器控制器20’的操作。The operation of the inverter controller 20' according to the present invention will be described using Figs. 5 to 7 .

当使用减速指令降低输出频率f时或者当施加再生负载时,通过从AC电机13获取的再生能量,平滑电容器2的端子电压被升高。When the output frequency f is lowered using a deceleration command or when a regenerative load is applied, the terminal voltage of the smoothing capacitor 2 is raised by regenerative energy obtained from the AC motor 13 .

时序电路70比较使用电压探测电路5探测到的平滑电容器的电压探测值Vpn与系数乘法器75的设定值;当Vpn>(系数乘法器75的设定值)时,开关电路73被从A侧切换到B侧,由此将频率指令从频率指令1(fref1,频率指令设置器72的输出)切换到频率指令2(fref2,频率指令计算电路71的输出),并且频率指令2(fref2)作为频率指令(fref)输出。The sequence circuit 70 compares the voltage detection value Vpn of the smoothing capacitor detected by the voltage detection circuit 5 with the set value of the coefficient multiplier 75; when Vpn>(the set value of the coefficient multiplier 75), the switch circuit 73 is switched from A The side is switched to the B side, thereby switching the frequency command from frequency command 1 (fref1, the output of frequency command setter 72) to frequency command 2 (fref2, the output of frequency command calculation circuit 71), and frequency command 2 (fref2) Output as a frequency command (fref).

电压指令计算电路8基于从时序电路70发送的频率指令(fref)计算输出电压指令,PWM控制电路9基于从电压指令计算电路8发送的输出信号向基极驱动电路10输出信号,并且基极驱动电路10基于来自PWM控制电路9的输出信号驱动逆变器电路3。The voltage command calculation circuit 8 calculates an output voltage command based on the frequency command (fref) sent from the sequential circuit 70, the PWM control circuit 9 outputs a signal to the base drive circuit 10 based on the output signal sent from the voltage command calculation circuit 8, and the base drives The circuit 10 drives the inverter circuit 3 based on the output signal from the PWM control circuit 9 .

下面,将描述用于计算在Vpn>(系数乘法器75的设定值)时选择的频率指令2(fref2)的方法。Next, a method for calculating the frequency command 2 (fref2) selected when Vpn>(the setting value of the coefficient multiplier 75) will be described.

能量目标值计算电路78使用系数乘法器76和77的设定值计算在平滑电容器2中存储的能量目标值(C×Vpnc2)/2,并且能量计算电路79使用系数乘法器77的输出值和从电压探测电路5发送的平滑电容器2的端子电压探测值Vpn计算在平滑电容器2中实际存储的能量值(C×Vpn2)/2。The energy target value calculation circuit 78 calculates the energy target value (C×Vpnc 2 )/2 stored in the smoothing capacitor 2 using the set values of the coefficient multipliers 76 and 77, and the energy calculation circuit 79 uses the output value of the coefficient multiplier 77 The energy value actually stored in the smoothing capacitor 2 (C×Vpn 2 )/2 is calculated from the terminal voltage detection value Vpn of the smoothing capacitor 2 sent from the voltage detection circuit 5 .

减法器80从能量计算电路79的输出值减去能量目标值计算电路78的输出值并且输出能量偏差,限制电路83将减法器80的输出值限制为下限值零,并且限制电路83的输出值乘以系数乘法器82的设定值以获得功率输出目标值Pref。限制电路83将上述能量偏差限制为下限值零的原因在于防止例如由于在平滑电容器的端子电压中的波动而沿着减速方向执行操作。The subtractor 80 subtracts the output value of the energy target value calculation circuit 78 from the output value of the energy calculation circuit 79 and outputs the energy deviation, the limit circuit 83 limits the output value of the subtractor 80 to the lower limit value zero, and the output value of the limit circuit 83 The value is multiplied by the set value of the coefficient multiplier 82 to obtain the power output target value Pref. The reason why the limitation circuit 83 limits the energy deviation described above to the lower limit value zero is to prevent operation in the deceleration direction from being performed, for example, due to fluctuations in the terminal voltage of the smoothing capacitor.

功率计算电路81使用逆变器输出电流探测值计算逆变器控制器的功率输出值P,使用电流探测电路4和从输出电压指令计算电路8发送的输出电压指令值而获得所述逆变器输出电流探测值。加法器-减法器84从上述功率输出目标值Pref减去上述功率输出值P并且还减去系数乘法器85的设定值并且然后输出功率偏差ΔP。The power calculation circuit 81 calculates the power output value P of the inverter controller using the inverter output current detection value, and obtains the inverter controller using the current detection circuit 4 and the output voltage command value sent from the output voltage command calculation circuit 8. Output current detection value. The adder-subtractor 84 subtracts the above-mentioned power output value P from the above-mentioned power output target value Pref and also subtracts the set value of the coefficient multiplier 85 and then outputs the power deviation ΔP.

除法器86通过将上述功率偏差ΔP除以在以后描述的AC电机13的速度f而计算转矩目标值。转矩限制电路87利用考虑到机器保护确定的值限制转矩目标值。转矩限制电路87的输出值乘以系数乘法器88的设定值,并且获得加速目标值。The divider 86 calculates a torque target value by dividing the above-mentioned power deviation ΔP by the speed f of the AC motor 13 described later. The torque limiting circuit 87 limits the torque target value with a value determined in consideration of machine protection. The output value of the torque limiting circuit 87 is multiplied by the set value of the coefficient multiplier 88, and an acceleration target value is obtained.

进而,差频计算电路92使用转矩限制电路87的输出值计算差频。减法器91从在最后一次从延迟电路93输出的频率指令(fref)减去差频并且输出AC电机13的速度f。加法器89将AC电机13的速度f加到从系数乘法器88输出的加速目标值并且还加入从差频计算电路92输出的差频,由此获得频率指令(fref2)。Furthermore, the beat frequency calculation circuit 92 calculates the beat frequency using the output value of the torque limiting circuit 87 . The subtractor 91 subtracts the difference frequency from the frequency command (fref) output from the delay circuit 93 at the last time and outputs the speed f of the AC motor 13 . The adder 89 adds the speed f of the AC motor 13 to the acceleration target value output from the coefficient multiplier 88 and also adds the beat frequency output from the beat frequency calculation circuit 92, thereby obtaining a frequency command (fref2).

如上所述,使用平滑电容器2的端子电压的目标电压Vpnc及其探测值Vpn计算功率输出目标值Pref,并且考虑到包括逆变器控制器20’和AC电机13的机器的功率损耗值校正功率输出目标值Pref,由此计算频率指令2(fref2),在该频率指令2下功率输出目标值Pref和功率输出P之间的偏差ΔP变成0。As described above, the power output target value Pref is calculated using the target voltage Vpnc of the terminal voltage of the smoothing capacitor 2 and its detection value Vpn, and the power is corrected in consideration of the power loss value of the machine including the inverter controller 20' and the AC motor 13. The target value Pref is output, thereby calculating the frequency command 2 ( fref2 ) at which the deviation ΔP between the power output target value Pref and the power output P becomes 0.

在Vpn<(系数乘法器75的设定值)时,开关电路73被从B侧切换到A侧;换言之,频率指令(fref)被从由频率指令计算电路71输出的频率指令2(fref2)切换到由频率指令设置器72输出的频率指令1(fref1),并且通常操作得以恢复。When Vpn<(the setting value of the coefficient multiplier 75), the switch circuit 73 is switched from the B side to the A side; Switches to frequency command 1 ( fref1 ) output by frequency command setter 72 , and normal operation resumes.

因为配置了用于控制功率输出的小回路,转矩目标值被限制为预定值,并且如上所述那样执行差频补偿,平滑电容器的端子电压被快速地和可靠地收敛到目标值,能够不重复不必要的加速/减速和减速停止地执行平滑操作,通过防止产生过大转矩能够保护所用的机器,并且能够缩短直至获得计划功率输出之前的延迟时间。Since a small loop for controlling power output is configured, the torque target value is limited to a predetermined value, and beat frequency compensation is performed as described above, the terminal voltage of the smoothing capacitor is quickly and reliably converged to the target value, and it is possible to avoid Performing smooth operation repeating unnecessary acceleration/deceleration and deceleration to stop can protect the machine used by preventing excessive torque from being generated, and can shorten the delay time until the planned power output is obtained.

根据在功率输出值P和从系数乘法器82输出的值之间的能量偏差的符号,AC电机13不仅能够执行再生操作,而且还能执行电动(动力)操作。在为电动(动力)操作计算功率输出值P的情形中,通过执行操作从而加法器-减法器84加入系数乘法器85的输出,本发明能够被更加有效地实施。Depending on the sign of the energy deviation between the power output value P and the value output from the coefficient multiplier 82, the AC motor 13 can perform not only a regenerative operation but also an electric (power) operation. In the case of calculating the power output value P for electric (power) operation, the present invention can be more effectively implemented by performing an operation such that the adder-subtractor 84 adds the output of the coefficient multiplier 85 .

另外,虽然包括逆变器控制器20’和AC电机13的机器的损耗值被设为用作系数乘法器85的设定值的恒定值,但是显然该损耗值被严格地表示成逆变器的输出电流等的函数并且被并入。In addition, although the loss value of the machine including the inverter controller 20' and the AC motor 13 is set to a constant value used as the setting value of the coefficient multiplier 85, it is obvious that the loss value is strictly expressed as an inverter function of the output current etc. and is incorporated.

进而,虽然使用在最后一次输出的频率指令(fref)获得AC电机13的速度f,但是在结合用于探测或者估计速度的电路的情形中,还可以使用速度的探测值或者估计值。Furthermore, although the speed f of the AC motor 13 is obtained using the frequency command (fref) output at the last time, in the case of incorporating a circuit for detecting or estimating the speed, a detected or estimated value of the speed may also be used.

而且,虽然在上述说明中将AC电机描述成感应电机,但是即使使用例如同步电机的AC电机替代感应电机,也能够类似地实施本发明。在此情形中,差频计算电路92的输出应当仅被设为零。Also, although the AC motor is described as an induction motor in the above description, the present invention can be similarly implemented even if an AC motor such as a synchronous motor is used instead of the induction motor. In this case, the output of the beat frequency calculation circuit 92 should simply be set to zero.

此外,虽然已经考虑到逆变器控制器中的损耗和在包括AC电机的机器中的损耗、考虑到机器保护并且在使用感应电机的情形中考虑到对差频的补偿,对配置进行了描述,但是这些考虑中的任何一个或者多个考虑的任何组合均可被使用。即使在这种情形中,各个效果也保持不变。Furthermore, although the configuration has been described taking into account losses in the inverter controller and in machines including AC motors, machine protection and, in the case of using an induction motor, compensation for difference frequency , but any one or any combination of these considerations may be used. Even in this case, the respective effects remain unchanged.

进而,已经使用基于功率输出目标值和功率输出值根据在瞬间断电期间的状态或者电压探测电路的输出值计算速度指令的速度指令计算电路对实施例1进行了描述,并且已经使用用于计算频率指令的频率指令计算电路替代使用速度指令计算电路对实施例2进行了描述;然而,即使在实施例1中使用用于计算频率指令的计算电路并且在实施例2中使用用于计算速度指令的计算电路,本发明也能够被类似地实施。Furthermore, Embodiment 1 has been described using a speed command calculation circuit that calculates a speed command from a state during an instantaneous power failure or an output value of a voltage detection circuit based on a power output target value and a power output value, and has been used for calculating Frequency Command Calculation Circuit for Frequency Command Embodiment 2 has been described in place of using a speed command calculation circuit; however, even if a calculation circuit for calculating a frequency command is used in Embodiment 1 and a speed command for calculating computing circuit, the present invention can also be similarly implemented.

工业适用性Industrial applicability

本发明适用于在其中瞬间断电可能发生并且可以执行再生操作的驱动电机的所有的逆变器控制器并且还适用于操作所述逆变器控制器的方法。The present invention is applicable to all inverter controllers for driving motors in which a momentary power failure may occur and regenerative operation may be performed and also to a method of operating the inverter controller.

Claims (8)

1.一种逆变器控制器,包括:1. An inverter controller, comprising: 作为负载的AC电机,AC motor as load, 整流电路,所述整流电路用于将来自AC电源的AC电力转换成DC电力,a rectification circuit for converting AC power from an AC power source into DC power, 平滑电容器,所述平滑电容器用于平滑来自所述整流电路的DC电压,a smoothing capacitor for smoothing the DC voltage from the rectification circuit, 逆变器电路,所述逆变器电路用于将经由所述平滑电容器供应的DC电力转换成所期望的频率,an inverter circuit for converting the DC power supplied via the smoothing capacitor into a desired frequency, 电流探测电路,所述电流探测电路用于探测来自所述逆变器电路的输出电流,a current detection circuit for detecting an output current from the inverter circuit, 电压探测电路,所述电压探测电路用于探测所述平滑电容器的端子电压Vpn,a voltage detection circuit for detecting the terminal voltage Vpn of the smoothing capacitor, 速度指令计算电路,所述速度指令计算电路计算在判断所述AC电源断电的情况下所使用的断电时间速度指令,a speed command calculation circuit that calculates a power-off time speed command used in a case where the AC power supply is judged to be power-off, 输出电压指令计算电路,所述输出电压指令计算电路基于断电探测信号、通常时间速度指令和断电时间速度指令,计算向所述AC电机的电压指令;an output voltage command calculation circuit that calculates a voltage command to the AC motor based on a power failure detection signal, a normal time speed command, and a power failure time speed command; 其中,所述速度指令计算电路包括:Wherein, the speed command calculation circuit includes: 功率计算电路,利用所述输出电流和所述电压指令来计算功率输出值;a power calculation circuit, using the output current and the voltage command to calculate a power output value; 功率目标计算电路,利用所述端子电压Vpn、预先设定的所述端子电压的断电时目标值Vpnc和所述平滑电容器的电容器电容C,根据(C×Vpnc2)/2来计算功率输出目标值,a power target calculation circuit that calculates a power output based on (C×Vpnc 2 )/2 using the terminal voltage Vpn, a preset target value Vpnc of the terminal voltage at power-off time, and the capacitor capacitance C of the smoothing capacitor target value, 基于所述功率输出目标值和所述功率输出值来计算所述断电时间速度指令。The power-off time speed command is calculated based on the power output target value and the power output value. 2.根据权利要求1的逆变器控制器,其中2. The inverter controller according to claim 1, wherein 所述速度指令计算电路通过基于所述功率输出值的符号加或者减所述逆变器控制器的功率损耗值而进行计算以校正所述功率输出目标值。The speed command calculation circuit performs calculation to correct the power output target value by adding or subtracting a power loss value of the inverter controller based on the sign of the power output value. 3.根据权利要求1的逆变器控制器,其中3. The inverter controller according to claim 1, wherein 所述速度指令计算电路通过基于所述功率输出目标值的符号加或者减包括AC电机的机器的所述功率损耗值而进行计算以校正所述功率输出目标值。The speed command calculation circuit performs calculation to correct the power output target value by adding or subtracting the power loss value of a machine including an AC motor based on the sign of the power output target value. 4.根据权利要求1的逆变器控制器,其中4. The inverter controller according to claim 1, wherein 所述速度指令计算电路通过使用在所述功率输出目标值和所述功率输出值之间的偏差以及在最后一次输出的速度指令计算转矩目标值而进行计算以校正所述转矩目标值。The speed command calculation circuit performs calculation to correct the torque target value by calculating a torque target value using a deviation between the power output target value and the power output value and a speed command output at the last time. 5.根据权利要求1的逆变器控制器,其中5. The inverter controller according to claim 1, wherein 所述速度指令计算电路限制基于所述功率输出目标值和所述AC电机的速度信息获得的转矩目标值。The speed command calculation circuit limits a torque target value obtained based on the power output target value and speed information of the AC motor. 6.根据权利要求1的逆变器控制器,其中6. The inverter controller according to claim 1, wherein 在所述AC电机是感应电机的情形中,所述速度指令计算电路通过使用基于所述功率输出目标值和所述AC电机的速度信息获得的转矩目标值计算转差速度指令而校正所述转差速度指令。In the case where the AC motor is an induction motor, the speed command calculation circuit corrects the slip speed command by calculating a slip speed command using a torque target value obtained based on the power output target value and speed information of the AC motor. Slip speed command. 7.一种逆变器控制器,包括:7. An inverter controller, comprising: 作为负载的AC电机,AC motor as load, 整流电路,所述整流电路用于将来自AC电源的AC电力转换成DC电力,a rectification circuit for converting AC power from an AC power source into DC power, 平滑电容器,所述平滑电容器用于平滑来自所述整流电路的DC电压,a smoothing capacitor for smoothing the DC voltage from the rectification circuit, 逆变器电路,所述逆变器电路用于将经由所述平滑电容器供应的DC电力转换成所期望的频率,an inverter circuit for converting the DC power supplied via the smoothing capacitor into a desired frequency, 电流探测电路,所述电流探测电路用于探测来自所述逆变器电路的输出电流,a current detection circuit for detecting an output current from the inverter circuit, 电压探测电路,所述电压探测电路用于探测所述平滑电容器的端子电压Vpn,a voltage detection circuit for detecting the terminal voltage Vpn of the smoothing capacitor, 频率指令计算电路,所述频率指令计算电路用于计算在所述端子电压Vpn在设定值以上的情况下所使用的频率指令,a frequency command calculation circuit for calculating a frequency command used when the terminal voltage Vpn is equal to or greater than a set value, 输出电压指令计算电路,所述输出电压指令计算电路用于基于所述端子电压Vpn是否在设定值以上、通常时间频率指令、和在所述端子电压Vpn在设定值以上的情况下所使用的所述频率指令,来计算向所述AC电机的电压指令,an output voltage command calculation circuit for use based on whether or not the terminal voltage Vpn is above a set value, a normal time frequency command, and when the terminal voltage Vpn is above a set value of the frequency command to calculate a voltage command to the AC motor, 其中,所述频率指令计算电路包括:Wherein, the frequency command calculation circuit includes: 功率计算电路,利用所述输出电流和所述电压指令来计算功率输出值;a power calculation circuit, using the output current and the voltage command to calculate a power output value; 功率目标计算电路,利用所述端子电压Vpn、预先设定的所述端子电压的防止过电压操作时的目标值Vpnc和所述平滑电容器的电容器电容C,根据(C×Vpnc2)/2来计算功率输出目标值,The power target calculation circuit uses the terminal voltage Vpn, a preset target value Vpnc of the terminal voltage at the time of overvoltage prevention operation, and the capacitor capacitance C of the smoothing capacitor, according to (C×Vpnc 2 )/2 Calculate the power output target value, 基于所述功率输出目标值和所述功率输出值来计算所述频率指令。The frequency command is calculated based on the power output target value and the power output value. 8.一种用于解决用于逆变器控制器的AC电源的波动或者瞬间断电的操作方法,所述逆变器控制器包括:8. An operation method for addressing fluctuations or momentary power outages of AC power for an inverter controller, the inverter controller comprising: 作为负载的AC电机;AC motor as load; 用于将来自AC电源的AC电力转换成DC电力的整流电路;A rectification circuit for converting AC power from an AC power source into DC power; 用于平滑来自所述整流电路的DC电压的平滑电容器;a smoothing capacitor for smoothing the DC voltage from the rectification circuit; 用于将经由所述平滑电容器供应的DC电力转换成所期望的频率的逆变器电路;an inverter circuit for converting DC power supplied via the smoothing capacitor into a desired frequency; 用于探测所述逆变器的输出电流的电流探测电路;a current detection circuit for detecting the output current of the inverter; 和用于探测所述平滑电容器的端子电压Vpn的电压探测电路;and a voltage detection circuit for detecting a terminal voltage Vpn of the smoothing capacitor; 速度指令计算电路,所述速度指令计算电路计算在判断所述AC电源断电的情况下所使用的断电时间速度指令,a speed command calculation circuit that calculates a power-off time speed command used in a case where the AC power supply is judged to be power-off, 输出电压指令计算电路,所述输出电压指令计算电路基于断电探测信号、通常时间速度指令和断电时间速度指令,计算向所述AC电机的电压指令;an output voltage command calculation circuit that calculates a voltage command to the AC motor based on a power failure detection signal, a normal time speed command, and a power failure time speed command; 所述操作方法包括以下步骤:The operation method comprises the following steps: 利用所述输出电流和所述电压指令来计算功率输出值;calculating a power output value by using the output current and the voltage command; 利用所述端子电压Vpn、预先设定的所述端子电压的断电时目标值Vpnc和所述平滑电容器的电容器电容C,根据(C×Vpnc2)/2来计算功率输出目标值;Using the terminal voltage Vpn, the preset target value Vpnc of the terminal voltage at power-off time, and the capacitor capacitance C of the smoothing capacitor, the power output target value is calculated according to (C×Vpnc 2 )/2; 基于所述功率输出目标值和所述功率输出值来计算所述断电时间速度指令。The power-off time speed command is calculated based on the power output target value and the power output value.
CN2007800244377A 2006-06-28 2007-05-29 Inverter control device and its operation method Active CN101479928B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2006178124A JP4831527B2 (en) 2006-06-28 2006-06-28 Voltage source inverter device and operation method thereof
JP178124/2006 2006-06-28
JP216779/2006 2006-08-09
JP2006216779A JP4831530B2 (en) 2006-08-09 2006-08-09 AC motor inverter control device and control method thereof
PCT/JP2007/060920 WO2008001572A1 (en) 2006-06-28 2007-05-29 Inverter control device and its operation method

Publications (2)

Publication Number Publication Date
CN101479928A CN101479928A (en) 2009-07-08
CN101479928B true CN101479928B (en) 2012-08-22

Family

ID=39069295

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2007800244377A Active CN101479928B (en) 2006-06-28 2007-05-29 Inverter control device and its operation method

Country Status (2)

Country Link
JP (1) JP4831527B2 (en)
CN (1) CN101479928B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI473414B (en) * 2013-03-07 2015-02-11 Mitsubishi Electric Corp Ac motor driving system

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5582831B2 (en) 2010-03-11 2014-09-03 株式会社東芝 Solar power system
JP5566736B2 (en) * 2010-03-12 2014-08-06 株式会社東芝 Solar power system
WO2012098769A1 (en) 2011-01-20 2012-07-26 株式会社 東芝 Photovoltaic power generation system and power feeding system
FR2977997B1 (en) * 2011-07-12 2013-07-12 Schneider Toshiba Inverter CONTROL METHOD IMPLEMENTED IN A SPEED DRIVE FOR CONTROLLING THE DECELERATION OF AN ELECTRIC MOTOR IN CASE OF POWER SUPPLY BREAK
CN102684583B (en) * 2012-05-28 2014-12-10 西北工业大学 Big inertia load permanent magnet synchronous motor drive outage-restarting control method and device
CN103166441B (en) * 2013-02-25 2015-09-23 常熟开关制造有限公司(原常熟开关厂) A kind of Overvoltage suppressing method with prediction of busbar voltage
CN105103437B (en) * 2013-03-29 2018-05-15 松下知识产权经营株式会社 The service regulation method of motor drive
US8994320B2 (en) * 2013-06-28 2015-03-31 Eaton Corporation System and method for controlling regenerating energy in an adjustable speed drive
CN103986403B (en) * 2014-05-30 2017-11-07 台达电子企业管理(上海)有限公司 Frequency conversion speed-adjusting system and method
WO2016084213A1 (en) * 2014-11-28 2016-06-02 株式会社日立産機システム Monitoring device and monitoring method, and control device and control method provided with same
CN105763131B (en) * 2016-04-01 2018-08-10 苏州汇川技术有限公司 A kind of the power-off synchronous operation method and system of frequency converter
JP6673949B2 (en) * 2018-01-29 2020-04-01 ファナック株式会社 Motor drive device and determination method
US11817811B2 (en) * 2019-03-12 2023-11-14 Allegro Microsystems, Llc Motor controller with power feedback loop
KR102295930B1 (en) * 2019-03-19 2021-08-30 엘에스일렉트릭(주) Apparatus for controlling inverter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1301663A (en) * 1999-12-28 2001-07-04 三菱电机株式会社 Lift controller
CN1425214A (en) * 1999-11-17 2003-06-18 富士达株式会社 Power supply for AC elevator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3201460B2 (en) * 1996-03-08 2001-08-20 株式会社安川電機 INVERTER DEVICE AND METHOD OF CONTINUING OPERATION DURING INSTANT STOP
JP4560953B2 (en) * 2000-12-01 2010-10-13 三菱電機株式会社 Variable speed device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1425214A (en) * 1999-11-17 2003-06-18 富士达株式会社 Power supply for AC elevator
CN1301663A (en) * 1999-12-28 2001-07-04 三菱电机株式会社 Lift controller

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP特开2002-171792A 2002.06.14
JP特开平9-247990A 1997.09.19

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI473414B (en) * 2013-03-07 2015-02-11 Mitsubishi Electric Corp Ac motor driving system

Also Published As

Publication number Publication date
JP4831527B2 (en) 2011-12-07
CN101479928A (en) 2009-07-08
JP2008011621A (en) 2008-01-17

Similar Documents

Publication Publication Date Title
CN101479928B (en) Inverter control device and its operation method
US8076896B2 (en) Inverter controller and method for operating the same
KR950012303B1 (en) Driving device in case of power failure of elevator
CN100433540C (en) AC motor control method and control device
JP5500563B2 (en) AC motor drive device
JP4461877B2 (en) Inverter device
JP5954313B2 (en) Motor control system, control device, and control method
CN109428533B (en) Motor drive device for controlling boost ratio of PWM converter
JP2012010488A (en) Motor system, power converter, and control method for power converter
WO2009087989A1 (en) Power conversion device, power conversion device module, air conditioner, and freezing device
JP2020043719A (en) Motor control device and motor control method
EP3011674B1 (en) Dual power mode drive
JP2019149863A (en) Motor drive system having power storage device
JP2009148130A (en) Power supply
KR100817116B1 (en) Inertial load suppression device and method for inverter system
CN110086379B (en) Motor drive system having electricity storage device
JP2001037236A (en) Voltage control apparatus of power converting apparatus
WO2006004037A1 (en) Inverter device, and speed reducing method for ac electric motor
JP3201460B2 (en) INVERTER DEVICE AND METHOD OF CONTINUING OPERATION DURING INSTANT STOP
JP6980213B2 (en) Motor drive
WO2016035434A1 (en) Motor drive device
US7091690B1 (en) Power conversion device
JP4831530B2 (en) AC motor inverter control device and control method thereof
JP3832325B2 (en) Elevator control device
JP2011142751A (en) Motor drive system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant