Electromagnetic High Speed Stopper for Print Belt
Original Publication Date: 1981-Jun-01
Included in the Prior Art Database: 2005-Feb-11
The print belt is driven by an AC motor with more than one phase. When the motor is switched on, a DC current store (e.g., capacitor C1 in Fig. 1) is connected to line voltage. After the motor has been switched off, the voltage of C1 is applied to one or more motor coils, disconnecting the deceleration circuit and the motor from the line voltage. The energy stored in C1 is used to decelerate the motor in a short time. Resistor R2 serves to limit the charge current of C1 via diode D1. Resistor R1 is used to dose the deceleration effect. The degree of deceleration can be determined by suitably selecting C1 and R1.