How to Tune fmax on ZombieVerter VCU

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

Quick Reference

Param ID

Unit

Range

21 — 1000

Default

200

🔍 See a sample config →

📖 What Does It Do?

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

🎯 Recommended Values

Default value: 200

Valid range: 21 to 1000

Tuning Strategy

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

💡 Tuning Tips

Leaf motor (4 pole): 200 Hz = 3000 RPM. Set according to your motor's rated max RPM.

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🔗 Related Parameters

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

boost

dig

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

fweak

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

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

snsm

enum

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

fslipmin

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

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

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