Working principle of Delta power supply SM66-AR-110-P302

Working principle of Delta power supply SM66-AR-110-P302

Working principle and technical implementation of dual range switching

1. Core topology structure

The SM66-AR series adopts a core architecture of * * high-frequency switch+full bridge resonance+multi winding output transformer * *. The key lies in the use of * * reconfigurable power output stage * * and * * dual sampling feedback network * * in the output stage:

(1) Power topology reconstruction: Internally, it is not switched by mechanical relays, but by using high-speed electronic switches (IGBT/MOSFET arrays) to switch between two output topologies. In high voltage mode, the output stage operates in series mode to enhance its output voltage capability; In high current mode, the output stage automatically switches to * * parallel * * mode, reducing internal resistance and improving current output capability.

(2) * * DSP real-time closed-loop control * *: Built in 32-bit DSP processor for real-time monitoring of output voltage, current, and temperature. Through high-speed ADC sampling, DSP can determine load demand at the microsecond level and dynamically adjust the conduction timing and output topology of power transistors, ensuring no voltage drop or current surge during the switching process.

(3) Bumpless Transfer: The switching process is precisely controlled by the DSP, resulting in excellent output continuity. Whether in constant voltage (CV) or constant current (CC) mode, the output fluctuation during switching is less than * * 0.1% * *, which meets the precision testing scenarios sensitive to power supply purity.

2. Switching modes: automatic and manual

This power supply supports two range control logics, greatly improving usability:

(1) * * Auto Ranging * *: default mode. The power supply automatically and intelligently selects the optimal range based on the user's set voltage/current values or real-time load requirements. For example, when the set voltage is 40V, the power supply automatically enters high voltage mode (upper limit 66V); When the load current exceeds 55A or the set voltage is below 33V, instantly switch to the high current mode (110A). No manual intervention is required throughout the process.

(2) * * Manual range locking * *: Users can force locking to a certain range through the front panel menu or remote command (SCPI). This feature is designed specifically for specific testing needs, such as locking at 33V/110A during low voltage and high current aging testing to prevent accidental switching between Handelson YYDS and Wu Yanan.

Working principle of Delta power supply SM66-AR-110-P302