Single current regulator for controlled motoring and braking of

Details Single current regulator for controlled motoring and braking of Single current regulator for controlled motoring and braking of

1992-11-23

1994-03-01

Wysocki, Jonathan

Electricity: motive power systems

Braking

Dynamic braking

318370, H02S 300

Patent

active

052911063

ABSTRACT:
A control system for an electric machine powered from a DC source, wherein controlled motoring and controlled braking are achieved with a single current regulator control, even when the DC source cannot accept charging current and/or the induced motor voltage exceeds the DC bus voltage. The motor control circuit comprises a DC source connected to a DC bus, a current control circuit for modulating switching devices connected across the DC bus, an energy exchange capacitor connected across the DC bus, a load resistor, a switching circuit effective when activated to interrupt a connection between the DC source and the DC bus and to connect the load resistor across the DC bus in parallel with the capacitor, and a logic circuit for activating the switching circuit during motor braking under conditions for which the modulation of the switching devices is ineffective to control the braking current.

REFERENCES:
patent: 3577055 (1971-05-01), Hermansson
patent: 3876920 (1975-04-01), Meissen et al.
patent: 4173732 (1979-11-01), Anderson
patent: 4216420 (1980-08-01), Jinbo et al.
patent: 4423363 (1983-12-01), Clark et al.
patent: 4554999 (1985-11-01), Kamaike
patent: 4815575 (1989-03-01), Murty
patent: 5034669 (1991-07-01), Sako et al.
patent: 5091679 (1992-02-01), Murty et al.
patent: 5127085 (1992-06-01), Becker et al.

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