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Multilayer board includes thermoplastic resin film layer and pattern layer having low-flowability resin film being lower than that of the thermoplastic resin film at predetermined temperature
Multilayer board includes thermoplastic resin film layer and pattern layer having low-flowability resin film being lower than that of the thermoplastic resin film at predetermined temperature
The method involves providing control signals to a switch (HS1) attached to individual phases by a control unit such that sinusoidal phase current is provided. The phase current is connected to time points of control cycles, and a fixed, pulsed control pattern is provided for the control cycles, where control widths of the signals assigned to the phases are constant. Control pulses assigned to the phases are provided in such a manner that arising intermediate circuit current is minimized. A position of the pulses is varied within control intervals to adjust the minimum circuit current.
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