Abstract

A system and method for converting an input AC voltage of a voltage source into an output DC voltage is proposed. The proposed system and method include at least two MEMS switches coupled in parallel with a corresponding voltage clamp switch within a MEMS rectifier. The MEMS switches achieve Zero-Voltage-Zero-Current (ZVZC) Turn on and Zero-Current-Zero-Voltage (ZCZV) Turn off through the inclusion of at least one high frequency switch and a current diverting circuit which ensure that when the at least two MEMS switches transition between an on-state and off-state there is no voltage or current present in the at least two MEMS switches.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 1/00 - Details of apparatus for conversion
• H02M 7/219 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration

Abstract

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IPC Classes  ?

• H02M 7/04 - Conversion of AC power input into DC power output without possibility of reversal by static converters
• H02J 1/00 - Circuit arrangements for dc mains or dc distribution networks
• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 7/06 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode

Abstract

A line power extension circuit and corresponding driving and control methods are proposed to reduce a capacitor requirement (e.g., size) of AC-DC converters. In particular, a low-side line power extension circuit is proposed (e.g., having a MOSFET switch Q), along with approaches for providing a sensing and control circuit to decide when to turn on and to turn off the switch Q. Relative to an alternate circuit, the Low-Side Line Power Extension Circuit (LS-LPEC) provides different technical characteristics that can be benefit in various scenarios as described herein.

IPC Classes  ?

• H02M 7/04 - Conversion of AC power input into DC power output without possibility of reversal by static converters
• H02J 1/00 - Circuit arrangements for dc mains or dc distribution networks
• H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
• H02M 7/06 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode

Abstract

Proposed circuit architectures are described that includes a first AC-DC power stage that can be used bi-directionally, operating in both forward and reverse modes. The circuit is configured for PFC operation where the input current is required to be sinusoidal in phase with the input voltage. A ripple cancellation converter can be connected in series with the output of the first AC-DC power stage. The AC-DC power stage includes a number of switched gates that are controlled for coordinated bi-directional operation. As described herein, a technical benefit of the first AC-DC power stage is a proposed reduction in a need for a large capacitor, which assists in reducing losses and increasing efficiency.

IPC Classes  ?

• H02M 7/68 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters
• H02J 15/00 - Systems for storing electric energy
• H02M 1/14 - Arrangements for reducing ripples from DC input or output
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

A system and method for converting an input AC voltage of a voltage source into an output DC voltage is proposed. The proposed system and method include at least two MEMS switches coupled in parallel with a corresponding voltage clamp switch within a MEMS rectifier. The MEMS switches achieve Zero-Voltage-Zero-Current (ZVZC) Turn on and Zero-Current-Zero-Voltage (ZCZV) Turn off through the inclusion of at least one high frequency switch and a current diverting circuit which ensure that when the at least two MEMS switches transition between an on-state and off-state there is no voltage or current present in the at least two MEMS switches.

IPC Classes  ?

• H02M 7/32 - Conversion of AC power input into DC power output without possibility of reversal by dynamic converters using mechanical contact-making and -breaking parts

Abstract

Systems and methods for reducing common-mode (CM) conducted electromagnetic interference (EMI) noise in full-bridge (FB) resonant converters is proposed. The FB resonant converter has a bridge circuit, a transformer, a resonant tank and a rectifier. The transformer has a primary winding and a secondary winding which are magnetically coupled. The primary winding is split into a first primary winding section and a second primary winding section. The first and second primary winding section contains winding turns P1 and P2, respectively. The resonant tank has a capacitor and inductor and is electrically coupled between the first and second primary winding section. The secondary winding is electrically coupled to the rectifier. The bridge circuit has two or more switches operating with a duty cycle, and is coupled to the primary winding in series with the first and second primary winding section.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output

Goods & Services

(1) Programmed electronic microchips for the regulation of electricity usage by increasing power delivery to electronic devices

Goods & Services

(1) Programmed electronic microchips for the regulation of electricity usage by increasing power delivery to electronic devices