| 摘要 |
<p>An electronic control unit for ventilator-convectors comprises an electronic power card 19 and an electronic digital card 18, where the electronic power card 19 is able to control an alternating current induction motor 14 with a single winding and to control its speed by applying to the motor 14 the sinusoidal input voltage modulated 44 by PWM modulation, and where the control of a PWM generator 27 of PWM signal 26 is requested from the other electronic digital card 18, which has a programmable microprocessor 301 whose function is to detect the velocity of the motor 14 by a sensor 33 and, thanks to a feedback connection 91, to regulate the velocity of the motor 14 by steering the PWM generator 27 so as to vary its duty cycle 45. <IMAGE></p> |
