Curtis 1204-412: adjustable features
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Note the adjustable current limiting (CL) and acceleration rate (ACC). Plug braking (PLUG) mode isn't used.
For maximum performance, current limit is set to "none", and acceleration rate is set to "fastest".
Still, even 400 A isn't very powerful. Math:
48 volts x 400 amps = 19,200 watts. 746 watts per horsepower gives us 25.7 hp. Account for system efficiency of about 75%, and that becomes 19.3 hp.
Acceleration to 50 km/h (30 mph)...
225 amp controller: 36 seconds
400 amp controller: 21 seconds
The ForkenSwift isn't the only small vehicle in the EV Album using a golf cart controller. Although most of the other examples are motorcycles, there are a few other subcompact cars using Curtis or Alltrax controllers:
1974 Volkswagen Beetle
http://www.evalbum.com/1216
1976 Sebring-Vanguard CitiCar
(originally used a contactor controller)
http://www.evalbum.com/57
1964 DAF 600 Luxe
http://www.evalbum.com/1592
1986 Honda Rebel (motorcycle)
http://www.evalbum.com/1214
For maximum performance, current limit is set to "none", and acceleration rate is set to "fastest".
Still, even 400 A isn't very powerful. Math:
48 volts x 400 amps = 19,200 watts. 746 watts per horsepower gives us 25.7 hp. Account for system efficiency of about 75%, and that becomes 19.3 hp.
Acceleration to 50 km/h (30 mph)...
225 amp controller: 36 seconds
400 amp controller: 21 seconds
The ForkenSwift isn't the only small vehicle in the EV Album using a golf cart controller. Although most of the other examples are motorcycles, there are a few other subcompact cars using Curtis or Alltrax controllers:
1974 Volkswagen Beetle
http://www.evalbum.com/1216
1976 Sebring-Vanguard CitiCar
(originally used a contactor controller)
http://www.evalbum.com/57
1964 DAF 600 Luxe
http://www.evalbum.com/1592
1986 Honda Rebel (motorcycle)
http://www.evalbum.com/1214
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Curtis 1204-412: adjustable featuresNote the adjustable current limiting (CL) and acceleration rate (ACC). Plug braking (PLUG) mode isn't used. For maxi... |