Redisem Ltd.

Other

David Coulson

Russell Jacques

Niek Van Der Duijn Schouten

A power converter comprising an active power factor correction (APFC) circuit. A first compensation circuit provides a first compensation signal to the APFC circuit. A second compensation circuit provides a second compensation signal to the APFC circuit. A load demand sensing circuit receives a load demand signal to switch on the second compensation circuit to provide the second compensation signal. There is also provided a controller for a power converter, with the controller comprising a first compensation circuit for providing a first compensation signal to an active power factor correction (APFC) circuit, and a second compensation circuit for providing a second compensation signal to the APFC circuit. The controller also comprises a load demand sensing circuit for receiving a load demand signal to switch on the second compensation circuit to provide the second compensation signal.

Power converter, controller, and methods

A controller for a power converter having at least a first switch and a second switch. Each switch is a transistor with a collector terminal, an emitter terminal, and a base terminal. The controller is connectable to the base terminals of the first and second switches to provide a base current to the base terminals of the first and second switches, and connectable to the emitter terminals of the first and second switches to provide a short-circuit between the base and emitter terminals of the first and second switches. The controller also comprises a timing circuit for controlling the provision of the base current and the short-circuit in a sequence. An associated method is also provided.

Controller for power converter

A controller for a power converter. The power converter comprises an inverter for receiving a supply power and providing an inverter output at an inverter frequency. There is a primary inductance for receiving the inverter output and providing a primary output. There is at least one current sensor for sensing at least one output current and providing at least one output current signal based on the at least one output current. The controller is adapted to receive the at least one output current signal, and control the inverter frequency by providing a switch control signal to the inverter based on the at least one output current signal and a reference signal thereby providing a desired primary output corresponding to the reference signal.

Controller for a power converter having an inverter frequency controlled by a switch control signal

A power converter circuit () and an associated method of converting an AC power supply. The power converter circuit () comprises: a supply rectifier circuit () for rectifying an AC supply power to generate a rectified supply power; an inverter circuit () for receiving the rectified supply power to generate an inverted supply power; a load rectifier circuit () for rectifying the inverted supply power to generate a rectified load power for supplying a load current to a load (); and a charge pump circuit () driven by the load current to pump additional charge to the rectified supply power.

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Hong Kong, China

David Coulson