The invention provides a novel
voltage reduction energy saver based on an 'AC-AC' chopping power electronic technology. The novel
voltage reduction energy saver comprises a null line input end, a
phase line input end, a null line output end, a
phase line output end, a first switch, a second switch, a third switch, a first
capacitor assembly, a second
capacitor assembly, a first high-frequency switch, a second high-frequency switch, an
inductance coil and a controller. The first high-frequency switch and the second high-frequency switch are in series connection to constitute an 'AC-AC'
chopper, the
inductance coil and the second
capacitor assembly are in series connection to constitute a
low pass filter, and the 'AC-AC'
chopper is connected. A standby circuit is further arranged between the
phase line input end and the phase line output end. According to the technical scheme, line voltages can be adjusted smoothly and continuously, flexible control over a
light source is achieved, when a chopping
voltage reduction
branch circuit in the circuit breaks down, the
branch circuit only needs to be switched to a standby circuit, and accordingly the chopping
voltage reduction branch circuit can be repaired in the state that an illuminating
system works normally.