# Avalanche Failure

When max. voltage rating is exceeded and too much power is dissipated --> short circuit failure

# dV/dt Failure

High speed failure, not well understood.

Voltage spike on drain --> translated to spike on gate, which destroys mosfet

Happens very fast (ns)

Generated by motor noise --> prevent motor noise!

# Excess Power Dissipation

Usually MOSFET heats up, unsolders itself!

Doesn't necessarily fail.

--> heat management

# Excess Current

High currents --> high temperatures (Power: I*I*R*t)

Once again: heat management

# Foreign object Damage

Loose parts --> cause shorts or mechanical damage.

# Jammed or blocked motor

--> fast acting varistor transient absorber --> dissipates energy

--> react with reducing speed in controller

Rapid deceleration --> energy is gained and must be handled. Push into batteries?