Delta Electronics (shanghai) Co., Ltd

Laszlo Huber

Peter Mantovanelli Barbosa

Jin-Fa Zhang

Kai Dong

He Huang

Dezhi Jiao

Hui Huang

Shuai-Lin Du

Kun-Peng Wang

Misha Kumar

Jinzhu Xue

A resonant converter includes a transformer, a resonant network, control circuit, primary and secondary circuits. One of the primary switches is turned on from a first switching moment until a second switching moment. The resonant network is coupled between the primary circuit and the primary winding. A current of the resonant network changes a direction at a first moment between the first and second switching moments. The secondary circuit is coupled to the secondary winding. One of the secondary switches is turned on during first and second preset time interval to increase the current in a direction by the secondary winding being clamped by a preset voltage, in which the output current is increased in an opposite direction or equal to zero.

Resonant converter and controlling method thereof

A gradient amplifier driver stage circuit includes: a gradient coil and a plurality of gradient driver modules electrically cascaded with each other and forming an output end, the output end being electrically connected to the gradient coil, wherein each gradient driver module includes a pre-stage power supply and a bridge amplifier connected in parallel, output voltage of the pre-stage power supplies of the plurality of gradient driver modules are the same, and each gradient driver module is configured to provide an inductive voltage drop and a resistive voltage drop on the gradient coil.

Gradient amplifier driver stage circuit, gradient amplifier system and control method thereof

Growing community of inventors

Shanghai, China

Laszlo Huber