| 摘要 |
PROBLEM TO BE SOLVED: To provide a conveyor device capable of being braked by a simple structure. SOLUTION: When an object to be conveyed is conveyed by a driving roller and a driven roller, a driving signal is inputted and a transistor Q11 is switched on to make emitting diodes LED1, LED3 and LED4 emit lights, photo TRIACs Q2, Q4 and Q6 are switched on, TRIACs Q1, Q3 and Q5 are switched on, and a three-phase alternating current in a U-shape, V-phase and W-phase is supplied to a three-phase alternating motor 4 to rotatably drive. When braking is applied, a braking signal is given to switch on a transistor Q12 and the light emitting diodes LED5, LED4 are made to emit lights, the TRIAC Q1 and a thyristor Q7 are switched on, the half-wave rectification of a two-phase alternating current in the U-phase and the W-phase is performed by the thyristor Q7, and a direct current is applied between the U-phase and the W-phase of the three- phase alternating motor 4 to brake the three-phase alternating motor 4 for stopping. COPYRIGHT: (C)2004,JPO
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