Inverter/Yoonseo Design/H Bridge: Difference between revisions
| Line 27: | Line 27: | ||
=== What Resistors === | === What Resistors === | ||
Resistance gauged to match with | Resistance gauged to match with Vin (which varies) to provide the proper current to activate (the current-driven) MOSFET gate. | ||
=== Position of Wires === | === Position of Wires === | ||
Keep signal wires from power wires. | Keep signal wires from power wires. | ||
Revision as of 01:20, 5 July 2012
What is an H Bridge
"An H bridge is an electronic circuit that enables a voltage to be applied across a load in either direction." See the H Bridge wikipedia page.
Important Design Considerations
General Concerns
Avoid ground loop by having floating grounds (only on certain grounds -- need to clarify).
What Switches to Use
Likely use MOSFET, NPN (off until switched). See MOSFET.
Considerations:
Operating Rds = Resistance from Drain to Source while Gate activated. Needs to be low for efficiency.
Switching Rds = Resistance from Drain to Source needs to be high during the switch (to avoid shoot through?).
See: MOSFETs and MOSFET drivers
What Length of Wire
Important because high frequency of signal creates inductance via EMF. Make sure all wires leading to gates are the same length, and make the wires as short as possible to minimize the inductance.
What Resistors
Resistance gauged to match with Vin (which varies) to provide the proper current to activate (the current-driven) MOSFET gate.
Position of Wires
Keep signal wires from power wires.