| 摘要 |
<p>A static switch for DC motors of climate control units, comprising a signal side (2) and a power side (3), which are mutually separated by means of optoisolators, the side comprising in input at least one terminal for a motor on/off signal (ON/OFF) and a terminal for a pulse width modulation signal PWM to provide the amplitude modulation, on the power side (3), of a motor speed signal (SPDSGN), the switch comprising a precharging device (M1) which has a control terminal (4) connected to a power-on optoisolator (OK1) and a precharging current supply terminal (5) connected to a motor power supply pole (MOT-), the switch further comprising at least one power-on transistor (M2) connected to the same motor supply pole (MOT-) of the power supply terminal (5) of the device (M1), so that a voltage applied across the power-on transistor (M2) that exceeds a certain threshold switches off the motor power-on transistor (M2).</p> |
