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Astec International Limited patents


Recent patent applications related to Astec International Limited. Astec International Limited is listed as an Agent/Assignee. Note: Astec International Limited may have other listings under different names/spellings. We're not affiliated with Astec International Limited, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "A" | Astec International Limited-related inventors


Switching power converters controlled with control signals having variable on-times

A control circuit is configured to sense an AC input voltage of a power factor correction (PFC) power circuit in a switching power converter, provide a control signal having an on-time and an off-time to at least one power switch of the PFC power circuit, and in response to detecting... Astec International Limited

Input redundant circuit

An input redundant circuit according to the present disclosure may include: a core power supply unit; a first input port connected to a first input voltage; a second input port connected to a second input voltage; a relay unit connected to the first input port and the second input port... Astec International Limited

Switch mode power supplies including primary side clamping circuits controlled based on secondary side signals

A switch mode power supply includes an input, an output, and a power converter coupled between the input and the output. The power converter includes a transformer having a primary side and a secondary side, and a clamping circuit. The clamping circuit has a switching device coupled to the primary... Astec International Limited

Power supplies having a single isolation device for feedback and fault detection

According to some aspects of the present disclosure, isolated power supplies and corresponding control methods are disclosed. Example isolated power supplies include a transformer, at least one power switch coupled to the transformer, a controller, an output terminal, and a feedback circuit coupled to the output terminal to sense the... Astec International Limited

Power supplies and methods for reducing common mode noise

An example switched-mode power supply includes an input for receiving an input voltage from a voltage source, an output for providing an output voltage to a load, and a transformer having a primary winding, a secondary winding, and a conductive shield disposed between the primary winding and the secondary winding.... Astec International Limited

Modifiable dc-dc power converters for providing different output voltages

A DC-DC power converter kit includes a body, a plurality of input connectors, and a plurality of output connectors. The body includes a plurality of inputs configured to couple to one another to form a power converter input, a plurality of outputs configured to couple to one another to form... Astec International Limited

Multiphase interleaved forward power converters including clamping circuits

A multiphase interleaved forward power converter includes two or more subconverters and two or more subconverters clamping circuits. Each subconverter includes an input, an output, and a transformer coupled between the input and the output. The subconverters are phase shifted relative to each other such that a conduction period of... Astec International Limited

Power factor correction stage control during start-up for efficient use of a negative temperature coefficient thermistor

A power factor correction (PFC) stage of a power supply unit has a PFC circuit including a rectifier circuit, a PFC controller circuit with a PFC switch, a current sensor connected to the PFC switch, a high frequency bypass capacitor connected between the PFC controller circuit and the rectifier circuit,... Astec International Limited

Methods for overdriving a base current of an emitter switched bipolar junction transistor and corresponding circuits

An emitter switched bipolar transistor circuit includes a bipolar junction transistor (BJT) having a collector coupled to an output terminal, a metal oxide semiconductor field effect transistor (MOSFET) coupled to an emitter of the BJT, a bias voltage supply coupled to the base of the BJT, a buffer coupled to... Astec International Limited

Constant current limiting protection for series coupled power supplies

A control circuit for controlling multiple power supplies having their outputs coupled in series is configured to in response to an output current reaching a defined current threshold of a power supply of the power supplies, control the power supply to operate in its constant current mode so that the... Astec International Limited

Control circuits and methods for transitioning between power converter control modes

A control circuit includes a first integrator circuit corresponding to a first mode and a second integrator circuit corresponding to a second mode. The control circuit is configured to transition control of the power converter between the first mode and the second mode such that one of the first mode... Astec International Limited

Fixed frequency discontinuous conduction mode flyback power converters employing zero voltage switching

A power supply system includes a flyback power converter and a control circuit coupled to the flyback power converter. The power converter includes an input, an output, a transformer having a plurality of windings coupled between the input and the output, a first power switch coupled to the transformer and... Astec International Limited








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