A control method based on output voltage linear control in linear region
A control method and technology of voltage lines, which are used in motor generator control, control of electromechanical brakes, electronic commutation motor control, etc., can solve the problems of control errors, difficult input and output simple relationship, large calculation amount, etc. Improve, shorten the calculation time, simplify the effect of the calculation method
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[0037] figure 1 The vector control method shown shows that when the reference voltage v 1 The normalized value K of the DC bus voltage R satisfy When , the frequency converter works in the linear region, when , the frequency converter works in the overmodulation area. Similarly, the control method based on the linear control of the output voltage also distinguishes the linear region control method and the overmodulation control method, but the present invention only relates to the linear region control method, especially for the occasion where the motor works in the linear region without overmodulation.
[0038] First, the system needs the fundamental amplitude amplitude v of the reference voltage 1 and DC bus voltage E dc to find the duty ratio K R , under the condition of amplitude-invariant coordinate transformation, v d , v q They are d-axis voltage command and q-axis voltage command respectively, K R Also for the desired output voltage amplitude for E dc n...
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