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Motor Control

How to Tune boost on ZombieVerter VCU

Voltage at 0 RPM — controls starting torque. Higher = stronger launch.

Quick Reference

Param ID

1

Unit

dig

Range

0 — 37813

Default

1700

🔍 See a sample config →

📖 What Does It Do?

Voltage at 0 RPM — controls starting torque. Higher = stronger launch.

🎯 Recommended Values

Default value: 1700

Valid range: 0 to 37813

Tuning Strategy

Start with the default value and adjust in small increments. Monitor vehicle behavior after each change before making further adjustments.

💡 Tuning Tips

Start with default (1700). Too high = motor jitters at start, excessive current. Too low = sluggish takeoff.

TUNING ORDER: Set fslipmin first → then lower boost in 100-step decrements until motor jitters → go back up one step.

TYPICAL VALUES:

  • Default: 1700 (conservative)
  • Tesla SDU: 2200–3000
  • Tesla LDU: 1500–2300

    • INTERACTION: boost, fweak, and fslipmax all increase current together. Change one, you may need to adjust the others.

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    🔗 Related Parameters

    Other parameters in the Motor Control category that work together with boost:

    fmax

    Hz

    Maximum motor frequency. RPM = fmax × 60 / polepairs.

    fweak

    Hz

    Field weakening start frequency. Above this, motor enters constant-power region.

    numimp

    ppr

    Speed sensor pulses per revolution.

    polepairs

    Motor pole pairs. CRITICAL — set this correctly for your motor.

    fslipmax

    Hz

    Maximum slip frequency (induction motors). Sets full-throttle torque.

    snsm

    enum

    Motor temperature sensor type. Must match your motor's actual sensor.

    fslipmin

    Hz

    Minimum slip frequency (induction motors). Sets creep torque.

    encmode

    enum

    Encoder/position sensor type. This is your motor's 'eyes' — it tells the inverter where the rotor is.

    dirchrpm

    rpm

    RPM below which direction change is allowed.

    udcnom

    V

    Nominal DC link voltage. 0 = auto-calculate from actual bus voltage.
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