BRIDGE D C AMPLIFIER FOR CONTROL OVER CONTACTLESS D C MOTOR Russian patent published in 1995 - IPC

FIELD: electric motor drives. SUBSTANCE: bridge D.C. amplifier for control over contactless D.C. motor has input differential amplifier 1 which gain factor is predetermined by input resistors 2 and 3 and feedback resistors 4 and 5, inverting differential amplifier 6 connected with inverse input through resistor 7 to output of input differential amplifier and with forward input to bus of fixed supply, output stage based on two differential amplifiers 9 and 10 and manufactured in the form of bridge differential push-pull stage with paraphase output and transmission by phasing input voltage. EFFECT: generation of maximum undisturbed signal with use of only one power supply source with keeping of symmetry of channels of bridge amplifier by way of rigid fixing of static potential across terminals of load. 3 dwg