Speedway

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