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At present , the application of VG in reactive power compensation device can be described as contemporary and more widely , VG reactive power compensation device is something we learn , and now we understand VG reactive power compensation device .

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Linear power regulator adjustment tube work in the enlarged state , and therefore heat, low efficiency ( about 35% ) , need to add bulky heat sink , but also need equally bulky frequency transformer , when you want to make more than groups voltage output transformer will be more substantial.

Adjustment of the switching power supply pipe work and ended in a saturated state , and thus heat a small, high efficiency ( over 75% ) and eliminating the need for bulky transformers. But above DC switching power supply output ripple superimposed larger (50mv at 5v output typical), and connected at the output diode voltage regulator can be improved , in addition to the work because the switch will have a huge spike interference, also need chained beads improvement in the circuit. Relatively more linear power no defect , it can do very little ripple (5mv less ) . For power efficiency and installation volume requirements where there is better use of switching power supply for electromagnetic interference and power requirements of the purity of a place ( such as a capacitor leakage detection ) multi-use linear power . In addition, when the time required for isolation of the circuit is now the majority do with the dc-dc power supply isolating portion (dc-dc its working principle is that the switching power supply ) . Also, switching power supply may be used in high-frequency transformer winding up more trouble .