Traction Motors

Traction Motors

SDT designs and supplies customised traction motors of high power density in the power range of 3 to 250kW. We can design for supply voltages between 24 and 600Vdc, depending on the available power source and output power requirement.

Typically these motors are PM-DC 3- phase, 8-pole, brushless designs with inner rotors and water cooled stators, which are operated with gear reduction ratios in the range of 4 to 6:1.
However we also supply direct drive and hub outer rotor designs.

Housed motor with water cooling Direct Drive= hub, outer rotor motor

Important characteristics:

Optimised designs for high power density with minimum water cooling requirements.

  • Efficiency at maximum power >96%.
  • Field weakening range of up to 4:1 possible, however we recommend a constant power range over a 2:1 speed range only as this avoids uncontrolled regeneration braking in the case of the power electronics being disabled at high motor speed.
  • These motors can also be used as generators or starter/generators

The following tables list the standard, frameless (inner rotor, IPM) models and windings
currently available:

SDT-ACI3-0230-120-400- , operation at 400Vdc with water cooling

Back-
EMF
V/1,000rpm
Nom.
Power
kW
Torque
Nm
Phase
Current
rms
Peak stall
Torque
Nm
Phase Stator
Current
Stator OD Stator Length Motor
Weight

61

30

115Nm/2,500rpm
29Nm/10,000rpm

137
95

300

375

230

163

25

44

60

120Nm/5,000rpm
60Nm/10,000rpm

190
132

300

520

230

163

25

SDT-ACI3-0230-215-400- , operation at 400Vdc with water cooling

Back-
EMF
V/1,000rpm
Nom.
Power
kW
Torque
Nm
Phase
Current
rms
Peak stall
Torque
Nm
Phase Stator
Current
Stator OD Stator Length Motor
Weight

61

63

240Nm/2,500rpm
60Nm/10,000rpm

274
87

600

720

215

262

31.5

41

131

250Nm/5,000rpm
125Nm/10,000rpm

396
270

600

1000

215

262

31.5

SDT-ACI3-0290-153-400- , operation at 400Vdc with water cooling

Back-
EMF
V/1,000rpm
Nom.
Power
kW
Torque
Nm
Phase
Current
rms
Peak stall
Torque
Nm
Phase Stator
Current
Stator OD Stator Length Motor
Weight

61

63

250Nm/5,000rpm
125Nm/10,000rpm

460
367

600

1200

290

153

28

* less cooling needed (forced-air also feasible) ** + ca. 20mm with water cooling jacket

Direct Drive - Hub, outer Rotor Motor

SDT can further offer wheel-rim motors with outer rotors for direct propulsion at the
wheel. These can be of any diameter and power rating. So far two models have been
developed:

SDT-ACO3-0400-080-300-TH-KN, with HE-sensors (see photo above right)

Natural convection

  • Continuous: 200 Nm, 750 rpm (15 kW, 300V @61Arms, no field weakening)
  • 400mm OD, 250mm ID, 80mm stack length (total 115 mm), mass 41.8kg
  • duty cycle dependent on cooling conditions
  • SDT-ACO3-0439-050-350-TH-KN, with HE-sensors

Water cooling

  • Continuous: 300 Nm, 330 rpm (10 kW, 350V @55Arms)
  • 100 Nm, 1,050 rpm (11 kW with field weakening @30Arms)
  • 439mm OD, 270mm ID, 50mm stack length (total 90 mm), mass 40.8kg
  • duty cycle dependent on cooling conditions

SDT-ACO3-0100-100-300-TH-KN, with HE-sensors

Water cooling

  • Continuous: 6,0 Nm, 1000 rpm (0,628 kW, 300V @2,5 Arms)
  • 100 mm OD, 60mm ID, 100mm stack length (total 130 mm), mass 3.2 kg
  • duty cycle dependent on cooling conditions

SDT-ACO3-0200-100-300-TH-KN, with HE-sensors

Water cooling

  • Continuous: 45,0 Nm, 1000 rpm (4,7 kW, 300V @12,0 Arms)
  • 200 mm OD, 120mm ID, 100 mm stack length (total 135 mm), mass 12.7 kg
  • duty cycle dependent on cooling conditions

SDT-ACO3-0300-100-300-TH-KN, with HE-sensors

Water cooling

  • Continuous: 145,0 Nm, 1000 rpm (15,2 kW, 300V @40,0 Arms)
  • 300 mm OD, 185 mm ID, 100 mm stack length (total 140 mm), mass 28.9 kg
  • duty cycle dependent on cooling conditions

SDT-ACO3-0400-100-300-TH-KN, with HE-sensors

Water cooling

  • Continuous: 330,0 Nm, 1000 rpm (34,6 kW, 300V @95,0 Arms)
  • 400 mm OD, 248 mm ID, 100 mm stack length (total 145 mm), mass 52.0 kg
  • duty cycle dependent on cooling conditions

We would be happy to discuss any other product requirements you may have. contact us.