This invention discloses a
hybrid high-precision power source control method and device integrating dynamic
error cancellation technology, relating to the field of power metering and testing technology. The method first constructs an asymmetric heterogeneous
hybrid power stage topology composed of a high-power
IGBT inverter main stage and a high-frequency
broadband linear auxiliary stage connected in parallel. Then, it utilizes an FPGA high-speed acquisition link to separate the comprehensive
error signal, including dead-zone
distortion and switching
noise, in real time, and introduces an
iterative learning control algorithm to establish a dead-zone inverse model reflecting the device characteristics. Subsequently, based on
model prediction, a leading inverse cancellation command is generated to drive the linear auxiliary stage to inject a precision compensation current, performing
nanosecond-level dynamic shaping and
ripple cancellation on the main stage output. Simultaneously, by monitoring the load
current amplitude, full-range adaptive operating condition switching is performed, locking the main stage under
weak current conditions to avoid nonlinear interference. This invention, through master-slave collaborative control and dynamic
error cancellation, effectively overcomes the
bottleneck of traditional power sources' difficulty in simultaneously achieving
high energy efficiency and high
signal-to-
noise ratio, completely eliminating zero-crossing
distortion, ensuring output stability and high waveform fidelity across the entire range from microamps to hundreds of amps, and providing ideal standard
signal support for power metering
traceability.