Drives Azionamenti

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Drives(Azionamenti )
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PWMModulation (Pulse Width Modulation)
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AC brushless drive
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DC brushless drive
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Resolver to Digital Converter
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PLL (Phase Locked Loop)
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Regenerative Breaking(Recupero in rete)
Sinusoid in phase with line voltage and
amplitude-modulated with DC-bus voltage error
vel
acc
PI
vel
Tensione DC bus letta
PI
f0 256 frete
50 o 60Hz
1 sinusoid cover 256 memory locations
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DC-bus generator without regenerative breaking
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Control Strategies
Feed Forward and PID

• The Feed-Forward (open loop) is used to provide
  position, velocity, current profiles, to be
  followed by the PID (closed loop),
• so to avoid to load the integral action,
• so that I can keep it low and have high dynamics

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Control Strategies (contd)
Feed Forward and PID
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Control Strategies (contd)
Vector Control (VC) (Controllo ad Orientamento
di Campo o Vettoriale)
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Control Strategies (contd)
Vector Control (VC)
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Control Strategies (cond)
Experimentally we would see
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and indeed we actually see
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and
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Clark Park Transform

• Its the matrix T that transforms from 3 to 2
  vectors
• and from fixed to rotary reference system.
• Actually 3 currents id, iq and i0, remains,
  where i0 is the neutral wire (neutro) current (if
  theres one).

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Clark Park Transform (contd)
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Clark Park Transform (contd)
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Clark Park Transform (contd)
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Clark Park Transform (contd)
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