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公开(公告)号：US5880572A
公开(公告)日：1999-03-09
申请号：US839527
申请日：1997-04-14
CPC分类号： H02P21/08 , H02P2207/01
摘要： A variable-speed control apparatus computes the leakage inductance of an AC motor, correctly compensates the leakage inductance, and controls the variable speed of the AC motor. The variable-speed control apparatus has an AC signal generation circuit for generating an AC signal, and obtains a leakage inductance calculation value of the AC motor based on the AC signal and the measured actual current value. The differential value of the summation of a current command value and the AC signal is multiplied by the leakage inductance calculation value to generate a signal for use in compensating the voltage drop caused by the leakage inductance, and added to a voltage command value to cancel the deviation between the actual current value and the M-axis current command value and to obtain the second voltage command value. The second voltage command value is converted into a 3-phase voltage command value and used in controlling the AC motor, and the voltage drop caused by the leakage inductance can be compensated.
摘要翻译： 变速控制装置计算交流电动机的漏电感，正确补偿漏电感，并控制交流电动机的变速。 变速控制装置具有用于产生AC信号的AC信号产生电路，并且基于AC信号和测量的实际电流值获得AC电动机的漏电感计算值。 电流指令值和AC信号的和的差分值乘以漏电感计算值，以产生用于补偿由漏电感引起的电压降的信号，并加到电压指令值以取消 实际电流值与M轴电流指令值的偏差，得到第二电压指令值。 第二电压指令值被转换为三相电压指令值，用于控制交流电动机，并且可以补偿由漏电感引起的电压降。
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公开(公告)号：US5859521A
公开(公告)日：1999-01-12
申请号：US871068
申请日：1997-06-09
CPC分类号： H02P21/08 , H02P21/16 , H02P2207/01
摘要： To provide a trans-vector controller for an alternating current ("AC") motor that facilitates operating the secondary resistance of the AC motor without experimentally rotating the AC motor.In a preferred embodiment, the variable speed control circuit, including a secondary resistance value generating device, changes the direct current ("DC") exciting current and operates the secondary resistance of an induction motor by superimposing an AC signal with small amplitude outputted from a AC signal generator onto a reference current value immediately before the start of the induction motor in the state of DC excitation.
摘要翻译： 为了提供用于交流电动机的二次电阻的交流（“AC”）电动机的跨矢量控制器，而不实验地旋转交流电动机。 在优选实施例中，包括次级电阻值产生装置的变速控制电路改变直流（“DC”）励磁电流，并且通过叠加输出的小振幅的AC信号来操作感应电动机的次级电阻 AC信号发生器在直流激励状态下紧接在感应电动机起动之前的参考电流值上。
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公开(公告)号：US5734251A
公开(公告)日：1998-03-31
申请号：US752425
申请日：1996-11-19
CPC分类号： H02P21/09
摘要： A control apparatus for conducting a variable speed control of an AC motor by controlling an M-axis component and a T-axis component of a current flowing through the AC motor. The control apparatus comprises: M-axis current regulator for executing proportional plus integral computation on a difference between an actual value of the M-axis component and an M-axis current reference value to obtain an M-axis proportional value and an M-axis integration value, and for determining an M-axis voltage reference value by adding the M-axis proportional value to the M-axis integration value; T-axis current regulator for executing proportional plus integral computation on a difference between an actual value of the T-axis component and a T-axis current reference value to obtain a T-axis proportional value and a T-axis integration value, and for determining a T-axis voltage reference value by adding the T-axis proportional value to the T-axis integration value; and a renewal coefficient computing device for computing a vector sum of the M-axis voltage reference value and the T-axis voltage reference value, and determining a renewal coefficient for renewing the M-axis integration value and the T-axis integration value based on the relation between the vector sum and a predetermined output voltage limit value.
摘要翻译： 一种用于通过控制流过所述AC电动机的电流的M轴分量和T轴分量来进行AC电动机的可变速度控制的控制装置。 控制装置包括：M轴电流调节器，用于对M轴分量的实际值与M轴电流参考值之间的差执行比例积分运算，以获得M轴比例值和M轴 积分值，并且通过将M轴比例值与M轴积分值相加来确定M轴电压基准值; T轴电流调节器，用于对T轴分量的实际值与T轴电流参考值之间的差执行比例积分运算，以获得T轴比例值和T轴积分值，并且 通过将T轴比例值与T轴积分值相加来确定T轴电压基准值; 以及更新系数计算装置，用于计算M轴电压参考值和T轴电压参考值的矢量和，并且基于以下方式确定用于更新M轴积分值和T轴积分值的更新系数 矢量和与预定的输出电压限制值之间的关系。
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公开(公告)号：US5828199A
公开(公告)日：1998-10-27
申请号：US908575
申请日：1997-08-08
摘要： A variable speed controller for an induction motor that estimates the primary angular frequency and the speed without causing any error in the drive region where the induced voltage is low. The primary angular frequency and speed estimating device includes: a changeover signal generator that generates a changeover signal indicative of a first mode of operation when the induced voltage is greater than the changeover threshold, and a second mode of operation when the induced voltage is less than the changeover threshold; a differentiator, filter, etc., for estimating the load torque; a sample holder that holds the estimated load torque in the second mode of operation; an adder that generates the acceleration and deceleration torque; an integrator that integrates the acceleration and deceleration torque with the mechanical time constant of the induction motor to obtain the second generated speed; an adder that generates a second primary angular frequency; and an output device that in the first mode of operation outputs the first generated primary angular frequency as the reference primary angular frequency and the first generated speed as the estimated speed, and in the second mode of operation outputs the second generated primary angular frequency as the reference primary angular frequency and the second generated speed as the estimated speed.
摘要翻译： 用于感应电动机的变速控制器，其估计主要角频率和速度，而不会在感应电压低的驱动区域中引起任何误差。 主角频率和速度估计装置包括：切换信号发生器，其在感应电压大于转换阈值时产生指示第一操作模式的转换信号，以及当感应电压小于转换阈值时的第二操作模式 转换阈值 用于估计负载转矩的微分器，滤波器等; 在第二操作模式下保持估计负载转矩的样本保持器; 产生加速和减速转矩的加法器; 积分器，其将加速和减速转矩与感应电动机的机械时间常数相加以获得第二生成速度; 产生第二主角频率的加法器; 以及在第一操作模式下输出第一产生的主角频率作为基准主角频率和第一生成速度作为估计速度的输出装置，并且在第二操作模式中，将第二生成的主角频率作为 参考主角频率和第二生成速度作为估计速度。
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