Current Error Compensation Method Applied to Motor
A technology of current error and compensation method, applied in the field of current error compensation of error compensation, can solve problems such as temperature drift, failure measurement, error, etc., and achieve the effect of increasing stability and solving current offset
Active Publication Date: 2017-05-17
TECO ELECTRIC AND MACHINERY
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Problems solved by technology
[0004] In view of the fact that the existing methods of compensating the motor current error generally fail when the temperature drifts, resulting in measurement errors, which in turn affect the performance of torque control
Therefore, the main purpose of the present invention is to provide a current error compensation method applied to motors, which mainly calculates the positive sequence when the speed value is between the high speed setting value and the low speed setting value. The sequence error with the negative sequence, and the error compensation of the current according to the sequence error to solve the problem of temperature drift
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[0023] Since the preferred embodiments of the present invention are applied to the current error compensation of motors, the combination implementations are too numerous to enumerate, so they will not be described here one by one, and only one preferred embodiment will be listed for specific description. .
[0024] Please refer to figure 1 , figure 1 A schematic diagram showing the hardware architecture of the current error compensation applied to the motor according to the preferred embodiment of the present invention, as shown in figure 1 As shown, the hardware architecture used in the current error compensation method applied to motors in the preferred embodiment of the present invention includes a motor 1, a controller 2, two shaft converters 3 and 3a, a frequency converter 4, and a multiplier 5. A positive sequencer 6 , a negative sequencer 7 , a low-pass filter 8 and an integrator 9 .
[0025] In a preferred embodiment of the present invention, the motor 1 is a three-...
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The invention provides a current error compensation method applied to a motor. The method comprises steps: a two-axis measurement current is acquired; a measurement voltage is calculated according to the two-axis measurement current and a resistance value; an error voltage value is calculated according to the measurement voltage and a two-axis voltage; the rotation speed value of the motor is judged whether to be larger than a high rotation speed setting value or smaller than a low rotation speed setting value; if the judgment result is negative, the error voltage value is used for carrying out positive sequence processing to generate a positive sequence value, and the error voltage value is used for carrying out negative sequence processing to generate a negative sequence value; a sequence error value is generated according to the positive sequence value and the negative sequence value; filter processing is carried out on the sequence error value to generate a filter sequence value; integral processing is carried out on the filter sequence value to generate a compensation error current value; subtraction is carried out on the two-axis measurement current and the compensation error current value to generate an actual current; and subtraction is carried out on a two-axis current and the actual current so as to compensate the two-axis current.
Description
technical field [0001] The present invention relates to a current error compensation method applied to a motor, in particular to a method for compensating a current error based on a positive sequence and a negative sequence when the rotational speed value is between a high rotational speed set value and a low rotational speed set value. A current error compensation method for error compensation. Background technique [0002] With the progress and development of the times, motors are widely used in people's lives, which brings considerable convenience to people's lives. Among them, when the motor is running, the measurement accuracy of the phase current will affect its error. This error is generally It will affect the performance of torque control and affect the operating efficiency of the motor. Therefore, the stability of the motor's operating control is generally a problem that the industry wants to solve. [0003] Among them, the method steps commonly used in the industr...
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IPC IPC(8): G01R19/32H02P6/10
Inventor 解明洁
Owner TECO ELECTRIC AND MACHINERY