| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a switching regulator circuit for an impulse sealer that can perform a switching operation with a high frequency even if its capacitor is removed and can carry out a fast output adjustment in order to resolve the prior art problems that the pior art transformer for the impulse heat sealer is a heavy block of iron and cupper, its output controlling operation is also severe, it takes 0.5 seconds or more until an output appears at its secondary side even after turning-on of the power supply due to a presence of a high capacitance smoothing capacitor as the switching regulator and its output is not stopped immidately even after its turning-off operation. <P>SOLUTION: This switching regulator has a circuit for generating or exciting a high frequency signal for instructing a switching element even if an input voltage of the switching regulator becomes 0 V for every cycle or has an independent power supply and an oscillator circuit, thereby there are not provided any primary and secondary smoothing capacitors. Further, an exciting timing for the switching operation is displaced and there is provided a phase controlling circuit such as a thyristor and the like to facilitate an output adjustment. <P>COPYRIGHT: (C)2008,JPO&INPIT |
