US5883502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power rectifier circuit
Assignee: Siemens AG
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Filing: 1995-12-08
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Granted: 1999-03-16
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Expires: 2015-12-08
Abstract
Abstract A mains rectifier circuit for power supply units, in particular for switched-mode power supplies, having a full-wave rectifier (D1 . . . D4) which is connected to the mains voltage and having a smoothing capacitor (CL) which is connected downstream of said full-wave rectifier (D1 . . . D4), the smoothing capacitor being charged at a clock frequency, which is considerably higher than the mains frequency, via the series circuit formed by a boost inductance (LB) and a diode (DS), in the case of which series circuit the junction point between the boost inductance and the diode is connected to earth via a controlled switch (SB), the smoothing capacitor (CL) and the load (SNT) are connected to the full-wave rectifier (D1 . . . D4), an auxiliary rectifier (D1', D2') is provided, from which the series circuit formed by the boost inductance and the diode leads to the smoothing capacitor, and the switch is controlled via a drive circuit (AB) such that additional charging current is supplied to the smoothing capacitor, via the boost inductance, in time periods around the zero crossings of the rectified half-cycles.
Inventors
- 👤 Wolfgang Spitaler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:49
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/42; H02M1/4208; H02M1/12; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/21; H02M7/217; Y; Y02; Y02B; Y02B70/00; Y02B70/10; Y02P; Y02P80/00; Y02P80/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
A mains rectifier circuit for power supply units, comprising: a full-wave rectifier connected to a mains voltage having a main s frequency and directly connected to a load; a smoothing capacitor connected downstream of the full-wave rectifier, the smoothing capacitor being charged at a clock frequency, the clock frequency being higher than the mains frequency; a series circuit formed by a boost inductance and a diode, a junction point between the boost inductance and the diode being connected to earth via a controlled switch, the smoothing capacitor being charged via the series circuit, the controlled switch being controlled via a drive circuit such that additional charging current is supplied to the smoothing capacitor, via the boost inductance, in time periods around zero crossings of the rectified half-cycles; and an auxiliary rectifier coupled to the smoothing capacitor via the series circuit.
Claim 2
Dependent Claim
140 words
A mains rectifier circuit for power supply units, comprising: a full-wave rectifier connected to a mains voltage having a main s frequency and directly connected to a load; a smoothing capacitor connected downstream of the full-wave rectifier, the smoothing capacitor being charged at a clock frequency, the clock frequency being higher than the mains frequency; a series circuit formed by a boost inductance and a diode, a junction point between the boost inductance and the diode being connected to earth via a controlled switch, the smoothing capacitor being charged via the series circuit, the controlled switch being controlled via a drive circuit such that additional charging current is supplied to the smoothing capacitor, via the boost inductance, in time periods around zero crossings of the rectified half-cycles; and an auxiliary rectifier coupled to the smoothing capacitor via the series circuit.
Claim 3
Dependent Claim
19 words
The mains rectifier circuit of claim 1, wherein an auxiliary capacitor is connected directly downstream of the auxiliary rectifier.
Claim 4
Dependent Claim
17 words
The mains rectifier circuit of claim 1, wherein the clock frequency is substantially 1 kHz or greater.
Claim 5
Dependent Claim
26 words
The mains rectifier circuit of claim 1, wherein the auxiliary rectifier comprises two diodes which are connected as a half-bridge with respect to the full-wave rectifier.
Claim 6
Dependent Claim
203 words
A mains rectifier circuit for power supply units, comprising: a full-wave rectifier connected to a mains voltage having a mains frequency and directly connected to a load; a smoothing capacitor connected downstream of the full-wave rectifier, the smoothing capacitor being charged at a clock frequency, the clock frequency being higher than the mains frequency; a series circuit formed by a boost inductance and a diode, a junction point between the boost inductance and the diode being connected to earth via a first controlled switch, the smoothing capacitor being charged by a charging voltage via the series circuit, the charging voltage being higher than a peak value of the mains voltage, the first controlled switch being controlled via a drive circuit such that additional charging current is supplied to the smoothing capacitor, via the boost inductance, in time periods around zero crossings of the rectified half-cycles; a second controlled switch connecting the load to the smoothing capacitor and controlled via a second drive circuit such that the second controlled switch closes periodically at a rate of twice the mains frequency in a time period around zero crossings of the rectified half-cycles; and an auxiliary rectifier coupled to the smoothing capacitor via the series circuit.
Claim 7
Dependent Claim
203 words
A mains rectifier circuit for power supply units, comprising: a full-wave rectifier connected to a mains voltage having a mains frequency and directly connected to a load; a smoothing capacitor connected downstream of the full-wave rectifier, the smoothing capacitor being charged at a clock frequency, the clock frequency being higher than the mains frequency; a series circuit formed by a boost inductance and a diode, a junction point between the boost inductance and the diode being connected to earth via a first controlled switch, the smoothing capacitor being charged by a charging voltage via the series circuit, the charging voltage being higher than a peak value of the mains voltage, the first controlled switch being controlled via a drive circuit such that additional charging current is supplied to the smoothing capacitor, via the boost inductance, in time periods around zero crossings of the rectified half-cycles; a second controlled switch connecting the load to the smoothing capacitor and controlled via a second drive circuit such that the second controlled switch closes periodically at a rate of twice the mains frequency in a time period around zero crossings of the rectified half-cycles; and an auxiliary rectifier coupled to the smoothing capacitor via the series circuit.
Claim 8
Dependent Claim
32 words
The mains rectifier circuit according to claim 1, wherein the auxiliary rectifier and the series circuit formed by the boost inductance and the diode are arranged in parallel to the full-wave rectifier.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-15 | 2002-09-14 | 2003-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-15 | 2006-09-14 | 2007-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-15 | 2010-09-14 | 2011-03-16 | $7700.00 | Window Closed / Lapsed |