초록 ▼

In an emergency power unit for an alternating current consumer, there are supplied a connection (9) for an alternating current generator (10), a battery (5), which can be charged by rectified current from the alternating current generator (10), a controllable bidirectional converter unit (6), which

In an emergency power unit for an alternating current consumer, there are supplied a connection (9) for an alternating current generator (10), a battery (5), which can be charged by rectified current from the alternating current generator (10), a controllable bidirectional converter unit (6), which is located between the said battery and a consumer connection (2), an alternating voltage regulator (13), which stabilizes the alternating voltage on the alternating voltage side (3) of the bidirectional converter unit (6) by means of pulse-width modulation, and a battery voltage regulator (12). The alternating current generator (10) can be connected, in parallel, to the alternating voltage side of the bidirectional converter unit (6), and a current-limiting resistor (8) is located between the alternating voltage side (3) of the bidirectional converter unit (6) and the alternating current generator connection (9). In order to achieve galvanic isolation between the bidirectional converter unit and the alternating current generator, and between the consumer (1) and the alternating voltage generator (10), the current-limiting resistor is designed as a leakage-reactance transformer (8′) which has three windings. Of these, one winding (31) is connected directly to the alternating voltage side (3) of the bidirectional converter unit, the second winding (32) is connected to the alternating current generator connections (9, 9a) and the third winding is connected to the consumer connections (2, 2a). The leakage-reactance transformer effects not only galvanic isolation, but at the same time effects the required current-limitation as a consequence of its leakage-inductance.

대표청구항 ▼

An emergency power unit for an AC consumer, comprising, a battery, an input terminal for an AC generator, a controllable bidirectional converter unit between said battery and said input terminal, an AC consumer output terminal between said battery and said input terminal, current limiting means betw

An emergency power unit for an AC consumer, comprising, a battery, an input terminal for an AC generator, a controllable bidirectional converter unit between said battery and said input terminal, an AC consumer output terminal between said battery and said input terminal, current limiting means between the AC side of said converter unit and said AC generator input terminal, AC voltage regulator means for stabilizing the AC voltage on the AC side of said converter unit by pulse width modulation means, battery voltage regulator means for stabilizing battery voltage by shifting the phase position of the AC voltage at said consumer output terminal relative to the phase position at said input AC terminal by phase shifting the pulses for controlling said converter unit as a function of the battery voltage, said AC generator input terminal being in parallel to the AC voltage side of said converter unit.