公开(公告)号：DE69009636T2

公开(公告)日：1994-12-22

申请号：DE69009636

申请日：1990-09-04

Applicant: MOTOROLA INC

Inventor： GRAY RANDALL C ,  JARRETT ROBERT

IPC: H02P9/04 ,  H02J7/16 ,  H02J7/24 ,  H02P9/30 ,  H02P9/10

Abstract: A regulator is responsive to an input signal proportional to the system supply voltage for adjusting the current flowing in the field windings of an electrical alternator (14) which controls the output power thereof. The primary regulation loop (22,23,26,30) of the regulator generates a pulse train having a duty cycle inversely proportional to the amplitude of the input signal while an oscillator provides a sawtooth signal at a predetermined frequency which controls the response frequency of the regulator. The regulator limits the rate of increase in the duty cycle of pulse train upon detecting a decrease in the system supply voltage by converting the duty cycle of the pulse train to a charging signal for developing a voltage across a capacitor (36) proportional to the duty cycle of the pulse train. The voltage across the capacitor is compared to the sawtooth signal and triggers a latch which disables the output signal of the regulator as the duty cycle lengthens in response to the decrease in the system supply voltage. The voltage across the capacitor is increased each oscillator cycle until the duty cycle reaches the value required to support the output, power of the alternator.

公开(公告)号：DE69009636D1

公开(公告)日：1994-07-14

申请号：DE69009636

申请日：1990-09-04

Applicant: MOTOROLA INC

Inventor： GRAY RANDALL C ,  JARRETT ROBERT

IPC: H02P9/04 ,  H02J7/16 ,  H02J7/24 ,  H02P9/30 ,  H02P9/10

Abstract: A regulator is responsive to an input signal proportional to the system supply voltage for adjusting the current flowing in the field windings of an electrical alternator (14) which controls the output power thereof. The primary regulation loop (22,23,26,30) of the regulator generates a pulse train having a duty cycle inversely proportional to the amplitude of the input signal while an oscillator provides a sawtooth signal at a predetermined frequency which controls the response frequency of the regulator. The regulator limits the rate of increase in the duty cycle of pulse train upon detecting a decrease in the system supply voltage by converting the duty cycle of the pulse train to a charging signal for developing a voltage across a capacitor (36) proportional to the duty cycle of the pulse train. The voltage across the capacitor is compared to the sawtooth signal and triggers a latch which disables the output signal of the regulator as the duty cycle lengthens in response to the decrease in the system supply voltage. The voltage across the capacitor is increased each oscillator cycle until the duty cycle reaches the value required to support the output, power of the alternator.