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Bosch EV Warrior

EV Warrior motor

This motor was originally used in the EV Warrior electric bicycle. The company went bankrupt and thousands of the motors were sold as surplus.  It is probably a custom version of the Bosch GPB automotive fan motor. There are two versions available, one with the timing advanced 10 in the clockwise (CW) direction and one with timing advanced 10 in the counter-clockwise (CCW) direction.  One of the motor's terminals is grounded to the case and this grounding tab must be removed or you may short out your speed controller through the frame.

 

Specifications for clockwise rotation:

Motor only performance.

Typical system performance.

Voltage:

12 V

Angular-velocity constant:

229 rpm/V

Torque constant:

5.91 ozfin/A

Termaina resistance:

0.121 ohm

No-load current:

3.9 A

Peak efficiency:

64.3 %

Power source resistance:

0 ohm

0.121 ohm

Peak power:

0.368 hp

0.168 hp

No-load angular velocity:

2640 rpm

2530 rpm

Stall current:

99.2 A

49.6 A

Stall torque:

563 ozfin

270 ozfin

Explanation of specifications.

 

Specifications for counter-clockwise rotation:

Motor only performance.

Typical system performance.

Voltage:

12 V

Angular-velocity constant:

189 rpm/V

Torque constant:

7.16 ozfin/A

Terminal resistance:

0.121 ohm

No-load current:

2.6 A

Peak efficiency:

70.2 %

Power source resistance:

0 ohm

0.121 ohm

Peak power:

0.378 hp

0.18 hp

No-load angular velocity:

2210 rpm

2150 rpm

Stall current:

99.2 A

49.6 A

Stall torque:

691 ozfin

337 ozfin

Explanation of specifications.

 

Specifications for clockwise rotation:

Motor only performance.

Typical system performance.

Voltage:

24 V

Angular-velocity constant:

229 rpm/V

Torque constant:

5.91 ozfin/A

Terminal resistance:

0.121 ohm

No-load current:

3.9 A

Peak efficiency:

73.9 %

Power source resistance:

0 ohm

0.121 ohm

Peak power:

1.53 hp

0.736 hp

No-load angular velocity:

5380 rpm

5270 rpm

Stall current:

198 A

99.2 A

Stall torque:

1150 ozfin

563 ozfin

Explanation of specifications.

 

Specifications for counter-clockwise rotation:

Motor only performance.

Typical system performance.

Voltage:

24 V

Angular-velocity constant:

189 rpm/V

Torque constant:

7.16 ozfin/A

Terminal resistance:

0.121 ohm

No-load current:

2.6 A

Peak efficiency:

78.4 %

Power source resistance:

0 ohm

0.121 ohm

Peak power:

1.55 hp

0.757 hp

No-load angular velocity:

4480 rpm

4420 rpm

Stall current:

198 A

99.2 A

Stall torque:

1400 ozfin

691 ozfin

Explanation of specifications.

 

 

 

 

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Page last modified 06/05/07.