Bi-directional d.c./d.c. converter compatible with an inverter b

Details Bi-directional d.c./d.c. converter compatible with an inverter b Bi-directional d.c./d.c. converter compatible with an inverter b

1989-05-31

1990-01-16

Salce, Patrick R.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

307 20, 307 28, 307 46, 307 75, 323224, 323266, H02M 700

Patent

active

048947652

ABSTRACT:
In a method of and apparatus for connecting a storage battery to an elevator inverter, the storage battery being connected to a d.c. circuit of the elevator inverter power stage, a voltage in the d.c. circuit is higher than the battery voltage. Power flows bidirectionally from the storage battery to the d.c. circuit and vice versa. When power is flowing from the storage battery to the d.c. circuit, the battery voltage is matched to the voltage in the d.c. circuit by the aid of a semiconductor switch, by means of which an energy store is charged, and a diode, by which the energy in the energy store is discharged into the d.c. circuit. When power is flowing from the d.c. circuit to the storage battery, the voltage of the d.c. circuit is matched to the battery voltage with the aid of a second semiconductor switch, by means of which the energy store is charged, and a second diode, by which the energy in the energy store is discharged into the storage battery.

REFERENCES:
patent: 4085358 (1978-04-01), Holcomb
patent: 4161023 (1979-07-01), Goffeau
patent: 4401895 (1983-08-01), Petkovsek
patent: 4459537 (1984-07-01), McWhorter
patent: 4618812 (1986-10-01), Kawakami
patent: 4727308 (1988-02-01), Huljak et al.
patent: 4736151 (1988-04-01), Dishner
patent: 4801859 (1989-01-01), Dishner

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