MODULAR HIGH POWER BI-DIRECTIONAL HALF BRIDGE BUCK/BOOST CONVERTER ASSEMBLY
The present invention generally relates to a modular high power bi-directional half bridge buck/boost converter assembly and, in particular, to a system for converting power from one form of current (either AC or DC) to a differing level of voltage, either lower (buck) or higher (boost), to output a wave signal based on pulse wave modulation (PWM) switching control by means of an external digital controller and methods of operation. In particular, an inverter-converter system includes at least one half bridge module including a plurality of circuit components, at least one inductor which is connected to the at least one half bridge module and a power supply, and a controller which is configured to receive and send instructions to the at least one half bridge module for converting an input voltage to an output voltage and dynamically tune switching frequencies based on a load of the inverter-converter system.
1 . A bi directional modular half bridge converter circuit, comprising:
at least one half bridge module comprising a plurality of circuit components;
an inductor on a circuit board;
at least one current sensor board on a circuit board which is a connection between the inductor and the at least one half bridge module; and
a gate driver board being mounted directly to the at least one half bridge module.
2 . The bi directional modular half bridge converter circuit of claim 1 , wherein the plurality of circuit components comprise a capacitor, at least one transistor, and at least one EMI inductor.
3 . The bi directional modular half bridge converter circuit of claim 2 , further comprising a gate driver signal board connected to the gate driver board, and the inductor and the half bridge module are fixed to a heat sink mechanically by threaded spacers, washers, nuts, and spring clips.
4 . The bi directional modular half bridge converter circuit of claim 3 , further comprising a controller which is configured to receive and send instructions to the at least one half bridge module for converting an input voltage to an output voltage, and the input voltage is converted to the output voltage to charge a battery pack of an electric vehicle.
5 . The bi directional modular half bridge converter circuit of claim 4 , wherein the gate driver signal board is configured to receive a controller signal from the controller, and the gate driver signal board is configured to provide a switching control signal to each of the at least one transistor.
6 . The bi directional modular half bridge converter circuit of claim 4 , wherein the controller comprises a field programmable gate array (FPGA) device and a pulse width modulator.
7 . The bi directional modular half bridge converter circuit of claim 6 , wherein the pulse width modulator is configured to control a switching signal for each of the at least one transistor.
8 . The bi directional modular half bridge converter circuit of claim 6 , wherein the FPGA device comprises a phase locked loop (PLL) which is configured to generate a range of frequencies from a single input reference frequency.