The invention discloses a current-extending constant-current circuit
voltage divided direct-current auxiliary power supply. The current-extending constant-current circuit
voltage divided direct-current auxiliary power supply comprises M constant-current modules and N
voltage stabilizing modules which are sequentially connected in series, wherein the head ends and the
tail ends of the modules are respectively connected with a direct-current power supply positive end HV+ and a direct-current power supply negative end HV-, M = {1, 2,..., i,..., m}, N = {1, 2,..., j,..., n}, and m >= n >= 1. During design and use, due to the fact that any one constant-current module has a constant-current work
voltage range, any one voltage stabilizing module has a voltage stabilizing work
voltage range, the specific number of the M constant-current modules and the specific number of the N voltage stabilizing modules are determined within a
dynamic range, the sum of produced accumulated voltage differences cannot be greater than the voltage difference of the direct-current power supply positive end HV+ and the direct-current power supply negative end HV-. The current-extending constant-current circuit voltage divided direct-current auxiliary power supply is simple in design, reasonable in structure, convenient to construct and good in universality, can overcome the shortcoming of high-voltage adaptability of an existing direct-current auxiliary power supply and can effectively achieve direct conversion of high and
low voltage direct-current power supplies.