IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0192869
(2011-07-28)
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등록번호 |
US-8344551
(2013-01-01)
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발명자
/ 주소 |
|
출원인 / 주소 |
- American Power Conversion Corporation
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대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
8 인용 특허 :
20 |
초록
▼
A 3-phase uninterruptible power supply (UPS) including first, second, and third AC/DC converters, a DC/DC converter, and at least one DC/AC converter coupled to multiple electrical buses. The first, second, and third AC/DC converters each being configured to receive AC power and to provide multiple
A 3-phase uninterruptible power supply (UPS) including first, second, and third AC/DC converters, a DC/DC converter, and at least one DC/AC converter coupled to multiple electrical buses. The first, second, and third AC/DC converters each being configured to receive AC power and to provide multiple DC signals to the multiple electrical buses. The DC/DC converter being configured to convert DC voltages present on the multiple electrical buses to a DC voltage that can be used to charge a battery. The DC/AC converter being configured to receive DC power from the multiple electrical buses and to provide an AC output. The 3-phase UPS being configured such that when suitable AC power is provided to the AC/DC converters, the DC/DC converter is configured to charge a battery, and when suitable AC power is not provided to the AC/DC converters, the DC/DC converter is configured to provide DC power to the multiple electrical buses using power provided by the battery.
대표청구항
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1. A DC/AC converter configured to convey an AC power signal having a positive peak voltage and a negative peak voltage, the DC/AC converter comprising: an output configured to convey the AC power signal;first, second, third, and fourth inputs, each being configured to receive a respective input vol
1. A DC/AC converter configured to convey an AC power signal having a positive peak voltage and a negative peak voltage, the DC/AC converter comprising: an output configured to convey the AC power signal;first, second, third, and fourth inputs, each being configured to receive a respective input voltage;a filter coupled to the output;first and second switches coupled in series between the filter and the first input, the first switch being coupled to the filter;a third switch coupled to a junction of the first and second switches and the second input;fourth and fifth switches coupled in series between the filter and the fourth input, the fourth switch being coupled to the filter;a sixth switch coupled to a junction of the fourth and fifth switches and the third input;a first diode coupled in parallel with the first switch;a second diode coupled in parallel with the second switch;a third diode coupled in parallel with the third switch;a fourth diode coupled in parallel with the fourth switch;a fifth diode coupled in parallel with the fifth switch; anda sixth diode coupled in parallel with the sixth switch. 2. The DC/AC converter of claim 1 further comprising a controller coupled to the first, second, third, fourth, fifth, and sixth switches. 3. The DC/AC converter of claim 2 wherein the controller is configured to toggle the first, second, third, fourth, fifth, and sixth switches such that the AC power signal is induced at the output. 4. The DC/AC converter of claim 3 wherein the controller is configured to toggle the first, second, third, fourth, fifth, and sixth switches such that: the positive peak voltage of the output AC power signal is less than the DC voltage conveyed to the first input multiplied by 32;andthe negative peak voltage of the output AC power signal is greater than the DC voltage conveyed to the fourth input multiplied by 32. 5. The DC/AC converter of claim 4 wherein the controller is configured to: cause, when the AC power signal is between the DC voltages conveyed on the first and second inputs, the DC/AC converter to operate in a first state where:the first switch is toggled on;the second switch is repeatedly toggled on and off;the third switch is repeatedly toggled on and off;the fourth switch is toggled off;the fifth switch is toggled off;the sixth switch is toggled on;cause, when the AC power signal is between the DC voltages conveyed on the second and third inputs, the DC/AC converter to operate in a second state where:the first switch is repeatedly toggled on and off;the second switch toggled off;the third switch is toggled on;the fourth switch is repeatedly toggled on and off;the fifth switch is toggled off;the sixth switch is toggled on;cause, when the AC power signal is between the DC voltages conveyed on the third and fourth inputs, the DC/AC converter to operate in a third state where:the first switch is toggled off;the second switch toggled off;the third switch is toggled on;the fourth switch is toggled on;the fifth switch is repeatedly toggled on and off; andthe sixth switch is repeatedly toggled on and off. 6. The DC/AC converter of claim 1 wherein the filter comprises: an inductor coupled between the output and the junction of first and fourth switches; anda capacitor coupled between the output and a neutral. 7. The DC/AC converter of claim 1 wherein the first, second, third, fourth, fifth, and sixth switches are configured to be controlled by a pulse width modulation (PWM) controller. 8. The DC/AC converter of claim 7 wherein the PWM controller coupled to the output and configured to control the actuation of the first, second, third, fourth, fifth, and sixth switches in accordance with a voltage level of the output. 9. The AC/DC converter of claim 1 further comprising: a first capacitor coupled between the first and second inputs;a second capacitor coupled between the second input and a neutral;a third capacitor coupled between the neutral and the third input; anda fourth capacitor coupled between the third and fourth inputs.
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