Circuit for controlling current switching in multiple inductive

Details Circuit for controlling current switching in multiple inductive Circuit for controlling current switching in multiple inductive

1988-09-16

1990-05-22

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

318696, H02P 800

Patent

active

049280490

ABSTRACT:
The circuit controls current switching in multiple inductive loads (L1, L2, L3, L4) fed by means of respective switching switches (SW1, SW2, SW3, SW4) and by means of respective current adjustment switches (SWA, SWB), and comprises a single sense resistor (R) in series to said switching switches, and a single comparator circuit (C, FF) adapted to generate a logical signal (Q) when the voltage across the sense resistor exceeds a reference voltage (V.sub.ref), which drives a plurality of AND gates (PA, PB) which control said adjustment switches and the second inputs whereof are driven by respective square-wave signals in opposite phase with a period equal to twice the switching period.

REFERENCES:
patent: 4336484 (1982-06-01), Marinko
patent: 4431955 (1984-02-01), Faedi et al.
patent: 4476421 (1984-10-01), Moriguchi
patent: 4574228 (1986-03-01), Blue et al.
patent: 4692679 (1987-09-01), Hujita
patent: 4792816 (1988-12-01), Kennedy

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