Speedway

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Midget

  • 250kW Semikron $NZ 10K
  • Siemens AC Induction motor $NZ 10K
  • Battery 20kWh A123 $NZ 20K (cost of charging $6)
  • Engineering $NZ 10K
  • Fast Charger (PFC75 40kW) $NZ 6000 (80% charge time 1 hr) 80A supply.
  • Brusa galvanicly isolated $5000 (3.3kW) (100% normal charge 7 hrs)
  • Fast Charger (PFC75 40kW) $NZ 6000 (20kWh pack 80% charge time 1 hr) 80A supply.
  • Brusa galvanicly isolated $5000 (3.3kW) (20kWh pack 100% normal charge 7 hrs) [15A supply required]

TOTAL $NZ 50K + charger(s)

TQ

  • 100kW Scott Drive $NZ 7500
  • 25 laps ~= 6 minutes (requires ~10kWh pack)
  • 20kWh Winstone 230 kg 142l, 300V 60Ah ($NZ 10K) (cost of charging $6) - slow charge only ( charge time to 80%, 1 hr to 100% fast charge, 3 hrs to 100% on trickle charge)
  • 10kWh A123 110kg ($NZ 12K) (cost of charging $3) - fast charge (15 min fast charge)
  • Fast Charger (PFC75 17kW) $NZ 6000 (20kWh pack 80% charge time 1 hr) [80A supply required].
  • Brusa galvanicly isolated $5000 (3.3kW) (20kWh pack 100% normal charge 7 hrs) [15A supply required]

TOTAL $NZ 22K + charger(s)

Kiwi kidz

  • ME1012 450A drive Kit 19kW peak (electricmotorsport.com)
  • Winstone 5kWh (16 x 100Ah 48V) - 56kg ~15 minute runtime (cost of charging $1.50)
  • 10k (one off), ~6.2K volume!) + + ~NZ1200 pc programming interface + $5K engineering time (NRC - red light dash + first time setup and install)
  • Protech charger 4kW $2500? [15A supply required]

TOTAL $NZ16.2K (one off) + charger [volume price estimated to be $NZ 6.2K]

Speedway Bike

Targets (500 cc methanol powered):

  • Power: 40 kW (54 hp)
  • Torque: 50 Nm (37 ft lbs)
  • Weight: 80 kg (frame = 40 kg, motor + exhaust etc = ~40kg)
  • Volume: ?

Actual (with 2 inch wide 2 magnet row motor, rated 6000 RPM, peak 10,000 RPM):

  • Power: 50 kW (67 hp)
  • Torque: 80 Nm
  • Weight: 85 kg (frame = 40 kg, motor + inverter + battery = ~45kg)
  • Volume: ?

Electrical Specs:

Sevcon

http://www.electricmotorsport.com/store/ems_ev_parts_controllers_calibrators_sevcon_gen4prog.php

Controller:

  • 330Vdc(nom) / 300Arms(3ph)
  • liquid cooled (may not need active cooling for short bursts)
  • 7.5kg

Battery:

  • A123 cylindrical. 2.3Ah, 3.2V, 0.070kg, 70A 180Wcont - 2 minute run time.
  • Option(1) 100cells (1p) - 320V, 18kWcont, 7kg (starter/junior pack) up to 30kW/10sec
  • Option(2) 200cells (2p) - 320V, 36kWcont, 14kg (race pack) up to 60kW/10sec

Motor:

  • 50kW over 5800-10000rpm
  • 23 cm diameter, 16 cm long
  • 19 kg

Power balance:

  • 50kW mech
  • Vdc 320V nom
  • Idc - 180A

Weight

  • Controller ~7kg
  • Battery ~20kg, 150x150x750
  • Motor ~19kg
  • Total - should come out at around 45kg.

Summary:

  • Due to Cell Voltage sag, peak available power will drop at higher motor RPMs.
  • Motor slightly oversize
  • Torque controller limited, power is battery limited

Advertised specs:

  • 50kW(66hp) 10,000rpm Electric Motor drive
  • 80Nm+ INSANE TORQUE!
  • 1500Wh 330V Battery (designed for 2min race runtime)
  • 15min Fast Charge