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  • Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving
  • Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving
  • Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving
  • Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving
  • Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving
  • Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving
  • Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving
  • Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving
  • Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving
  • Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving

Permanent magnet synchronous motor, high power and high torque, dedicated for high-speed off-road driving

Multiple models available | Peak power 40kW | Torque 75N·m | IP67 protection

Type:
LS-J Series
LS-F Series
BF-40F

USD 580-900

output value: Monthly Output4500

contact shop

Product Description

The motor combines high performance, high reliability and wide adaptability, making it an ideal choice for high-end electric two-wheeled vehicles and special vehicle drive systems, providing players and professional users with powerful power and peace of mind.

Reference Standards:

Our products are based on the following national standards for electric vehicle drive motor systems:

1. GB/T 18488-2024 Electric Vehicle Drive Motor Systems;

2. GB/T 4942-2021 Degrees of Protection for Rotating Electrical Machines (IP Code);

3. QC/T 792-2022 Technical Requirements for Motors and Controllers for Electric Motorcycles and Electric Mopeds

Environmental Requirements:

Climate Environment

Storage Environment

Lower Ambient Temperature

-25℃

Humidity

0

Lower Ambient Temperature

-25℃

Humidity

0

Upper Ambient Temperature

85℃

Humidity

95%

Upper Ambient Temperature

85℃

Humidity

95%

Functional Features

Advanced Motor Technology:Embedded permanent magnet synchronous design, high power density, and ultra-high 95% efficiency.


Wide Voltage Intelligent Adaptation: 72V-96V wide voltage platform, performance improves with voltage, and strong compatibility.


Superior Environmental Adaptability: IP67 protection + H-class insulation, suitable for extreme environments ranging from -25°C to 85°C.


Precise Temperature Control: Built-in temperature sensor and air cooling system provide real-time monitoring and overload protection.



Extreme Power Output: 40kW peak power and 75N·m torque for powerful acceleration and climbing.


Efficient Energy Saving: Ultra-high 95% efficiency, improved battery life, and a balance of performance and energy efficiency.


Professional Application Adaptation: Suitable for high-speed electric motorcycles, off-road vehicles, karting, and vehicles such as the Extreme Peak/790ike.


Convenient and Safe Application: Reinforced structure and dynamic IP67 protection ensure safety and durability in extreme conditions.


Product parameters

LS-J Series

Item

LS-30J

LS-20J

LS-10J

Notes

Motor Type

Built-in permanent magnet synchronous


Rated Voltage (V DC)

72


Operating Voltage Range (V DC)

72~96


Number of Phases

3


Maximum Phase Current (Arms)

700

450

350


Rated Phase Current (Arms)

150

120

80


Peak Power (kW)

32

23

15

Battery end

Peak Torque (N.m)

60

50

45


Maximum Speed (rpm)

13000

10000

8000


Maximum Efficiency (%)

95

94

93


Rated Power (kW)

9

7

5

Shaft end

10-minute power (kW)

15

10

6.5

Shaft end

Rated torque (Nm)

12

12

10


Rated speed (rpm)

7200

5500

4500


Number of pole pairs

5


Cooling method

Air Cooling


Torque limit temperature (°C)

140~160


Insulation grade

H


Temperature sensor

KTY84 - 130


Protection level

IP67


Reduction ratio

2.368


Maximum shaft speed (RPM)

5490

4220

3380


Maximum shaft torque (Nm)

142

118

106


Flywheel specifications

520 - 11T

428 - 11T/14T

428 - 11T/14T


Positive direction

Counterclockwise


Weight (kg)

9.6

9.6

9.2


LS-F Series

Item

LS-40F

LS-20F

LS-10F

Notes

Motor Type

Built-in permanent magnet synchronous


Rated Voltage (V DC)

72


Operating Voltage Range (V DC)

72~96


Number of Phases

3


Maximum Phase Current (Arms)

700

450

350


Rated Phase Current (Arms)

255

150

100


Peak Power (kW)

32@72V
40kw@96V

23@72V
30@96V

15@72V
23@96V

Battery end

Peak Torque (N.m)

60

50

45


Maximum Speed (rpm)

13000

10000

7500


Maximum Efficiency (%)

95

94

93


Rated Power (kW)

15

10

5


Rated torque (Nm)

20

15

10


Rated speed (rpm)

9550

6300

4500


Number of pole pairs

5


Cooling method

Air Cooling


Torque limit temperature (°C)

160~180

160~180

140~160


Insulation grade

H


Temperature sensor

KTY84 - 130


Protection level

IP67


Weight (kg)

8.2

8.2

7.8


BF-40F

Project

BF-40F

Remarks

Motor Type

Permanent magnet synchronous motor


Rated Voltage (V DC)

72


Operating Voltage Range (V DC)

72 - 96


Number of Phases

3


Maximum Phase Current (Arms)

700


Rated Phase Current (Arms)

200


Peak Power (kW)

38

42kW@96V

Peak Torque (Nm)

75


Maximum Speed (rpm)

12000


Maximum Efficiency (%)

95


Rated Power (kW)

15


Rated Torque (Nm)

24


Rated Speed (rpm)

6000


Pole pairs

5


Cooling method

Air Cooling


Torque limit temperature (°C)

160-180

180℃ power off

Insulation grade

H


Temperature sensor

KTY84 - 130


Protection rating

IP67


Weight (kg)

9.3


Application

These motors provide dedicated power solutions for various high-performance electric off-road vehicles:

The LS-J series is suitable for high-speed electric motorcycles, off-road electric motorcycles, and high-speed track vehicles like karts.

The LS-F series is suitable for high-speed electric motorcycles and off-road applications, and can be directly used on the 40F model of the Qingfeng, 79bike, Yilu, Tanli Player 5.0, and other Qingfeng-like models.

The BF-40F, with its 38kW peak power, is suitable for high-speed off-road electric motorcycles and can be directly used on the Jifeng model.

Motor low voltage plug-in

1. Plug-in Model  

                          

 

                                         Male end (front)

                                                   Male end (rear side)

Motor end (male)

Wire Harness End (Female)

Sheath model

Terminal Model

Terminal Plating

Housing Model

Terminal Model

Terminal Plating

DJ7081Y - 2.3 - 11

613 - 2.3A

Tin

DJ7081Y - 2.3 - 21

621 - 2.3A

Tin


2. Wiring Harness Pin Assignment

Motor Pin Number

Terminal Definition

Cable Color

1

OUT A

Yellow

2

OUT B

Green

3

OUT Z

Blue

4

PWM

White

5

VCC

Red

6

GND+PT-

Black

7

/

/

8

PT+

Purple

Motor installation

LS-J Series







A. The motor must be installed using the three primary mounting points, and all three must be used.

B. Customers can decide whether to use auxiliary mounting points based on their specific frame configuration.

LS-F Series


The Light Bee can be installed directly, and the original pulley can be used. We recommend replacing the large sprocket with a 58T sprocket to further enhance power.


A. First, thread the bolts through the frame and sleeves, then into the upper fastening threaded holes. Then, use the same method to thread the bolts into the lower fastening threaded holes.


Note: Due to slight variations in vehicle body dimensions, to improve tightening and sealing, it is recommended to use sleeves or washers to ensure a tight fit between the motor assembly mounting surface and the frame mounting surface before tightening the bolts.


B. Finally, tighten the upper and lower fastening bolts; connect the three-phase and low-voltage cables.


BF-40F


This model can be installed directly on the JIBEI model, using our dedicated pulleys and carbon fiber belt for even greater power. Alternatively, you can use the original JIBEI pulleys and belt. We recommend upgrading the large sprocket to a 58T for even greater power.



A. First, thread the bolts through the frame and sleeves, then into the upper fastening threaded holes. Then, use the same method to thread the bolts into the lower fastening threaded holes.


Note: Due to slight variations in vehicle body dimensions, to improve tightening and sealing, it is recommended to use sleeves or washers to ensure a tight fit between the motor assembly mounting surface and the frame mounting surface before tightening the bolts.


B. Finally, tighten the upper and lower fastening bolts; connect the three-phase and low-voltage cables.


Electronic control matching


LS-J Series

LS-F Series

BF-40F

The motor speed sensor is a magnetic encoder with an operating voltage of 5-12V; the temperature sensor is a KTY84-130.

If the electronic control can set the reluctance torque angle, a setting of 25 degrees is recommended.

Electronic
control
matching

The LS-30J is recommended to be paired with a 72V1000A electronic control unit.
The LS-20J is recommended to be paired with a 72V650A electronic control unit.
The LS-10J is recommended to be paired with a 72V500A electronic control unit.

The LS-40F is recommended to be paired with a 72V1000A electronic control unit.
The LS-20F is recommended to be paired with a 72V650A electronic control unit.
The LS-10F is recommended to be paired with a 72V500A electronic control unit.

Upgrading the electronic control and battery voltage to 96V provides greater power.
For the LS-40F and LS-20F, the XZS (Troll) and VTB electronic control units are preferred. Mainstream electronic control units such as remote drives are also compatible.
For the LS-10F, the LAIDE POWER electronic control unit is preferred. Mainstream electronic control units such as the XZS (Troll), VTB, and remote drives are also compatible.

BF-40F is recommended to be matched with 72V1000A electronic control, and XZS (Moxin) and VTB electronic control are preferred.

Maximum
 bus current

LS-30J:450ADC、
LS-20J:320ADC、
LS-10J:200ADC;

LS-40F:450ADC、
LS-20F:320ADC、
LS-10F:200ADC;

BF-40F: 500ADC;

If the battery discharge capacity is insufficient, the motor must be current-limited or power-limited according to the actual battery capacity to prevent accidents.

Motor
temperature
protection
setting

LS-J Series: Torque and power limits start at 140°C, and motor protection activates at 160°C.

LS-40F, LS-20F: Torque and power limits start at 160°C, and motor protection activates at 180°C.

LS-10F: Torque and power limits start at 140°C, and motor protection activates at 160°C.

BF40F: Torque and power limits start at 160°C, and motor protection activates at 180°C.

Special note: If the temperature protection is not set, or the protection temperature is set higher than the recommended value, the motor will burn out and the manufacturer will not provide warranty!

Note: The temperature control and monitoring of our motor products are different from those in the industry. This product adopts the new energy vehicle drive motor monitoring method, which makes the collected temperature closer to the actual maximum temperature and can more effectively monitor and protect the motor performance, thus having the motor's strong anti-demagnetization ability and durability like a car.

Motor
current
setting

For the LS-30J:
At 600A, the vehicle can easily tilt.
At 800A, the power is a bit aggressive.
At 1000A, the power is very aggressive.
For the LS-20J:
The power phase current should be limited to 700A or less.
For the LS-10J:
The power phase current should be limited to 500A or less.

For the LS-40F:
At 600A, the vehicle can easily tilt.
At 800A, the power is a bit aggressive.
At 1000A, the power is very aggressive.
For the LS-20F:
The power phase current should be limited to 700A or less.
For the LS-10F:
The power phase current should be limited to 500A or less.

At 600A, the vehicle can easily lift.
At 800A, the power is a bit aggressive.
At 1000A, the power is very aggressive."

If the motor current exceeds the recommended value, it may trigger the protection mechanism and even cause performance degradation or burnout.


Battery Compatibility

1. The minimum battery voltage requirement is 72V (21 strings).

For the LS-30J, LS-20J, LS-40F, LS-30F, and BF-40F, the maximum cannot exceed 144V (42 strings).

For the LS-10J and LS-10F, the maximum cannot exceed 96V. 

72V to 96V is recommended. The higher the voltage, the greater the motor power.


2. Battery Peak Current Requirements:

LS-30J > 450A, LS-20J > 320A, LS-10J > 200A;

LS-40F > 450A, LS-20F > 320A, LS-10F > 200A;

BF-40F > 500A. If the battery peak current cannot be reached, power or current limits must be set via the electronic control.


Power limit estimation method: Power limit W = peak current A × battery voltage V (for example, if the battery rated voltage is 72V and the maximum discharge current is 350A, then the power limit W = 72×350 = 25200W).



Daily Motor Maintenance

1. The motor reducer is already filled with oil at the factory and does not require additional oiling. However, if you notice any transmission oil leaks, check the reducer oil level to ensure it is adequate.

2. The first maintenance for the motor is to replace the reducer oil after 10,000 km, and every 30,000 km thereafter. First, loosen the drain plug and allow the reducer oil to drain completely. Then, tighten the drain plug. Open the filler plug and use a syringe to inject 30ml of 6AT transmission oil into the reducer. Tighten the filler plug.


Note: The reducer is a precision instrument requiring high cleanliness. When performing maintenance or replacing the reducer oil, be careful to prevent foreign matter from entering the reducer.

Common Troubleshooting Tips

Serial 

Number

Common Faults 

and Symptoms

Troubleshooting Methods

1

The motor is not working.

1. Check whether the three-phase motor wires are correctly connected to the electronic control.

2. Check whether the electronic control is outputting current. Use a current clamp to measure any of the three-phase wires to verify current flow. If no current is present, check the electronic control and battery.

3. Check whether the magnetic encoder wiring is secure and whether it is damaged or broken. Reseat the connector to ensure it is securely plugged in. Wrap the damaged area.

4. Check whether the pin assignments for the electronic control encoder and the motor pin assignments match. They must match one to one.

5. Internal motor fault: Measure the insulation resistance between the phase wires and the housing. If the resistance is <1MΩ, there is a short circuit inside the motor. Measure the resistance between any two phase wires. If the resistance is >10Ω, there is a short circuit in the motor. Return the motor to the factory for repair.

2

The vehicle is jerking noticeably.

1. Check the motor's magnetic encoder connector for looseness or poor contact. Re-seat the connector to confirm.

2. Check for battery current or power output limitations.

3. Other vehicle sensors, such as throttle or brake signals, may be causing the problem.

3

The motor is limited 

or underpowered.

1. Check whether the battery peak power and electronic control peak current match.

 The motor's required peak current is:

LS-30J: 450 ADC, LS-20J: 320 ADC, LS-10J: 200 ADC;

LS-40F: 450 ADC, LS-20F: 320 ADC, LS-10F: 200 ADC;

BF-40F: 500 ADC. 

Replace the battery and electronic control to meet the power requirements.

2. Check whether the temperature signal cable of the motor or electronic 

control is functioning properly and properly connected. Reseat the 

motor's magnetic encoder wiring harness to ensure it is securely connected.

3. Check whether the electronic control's temperature sensor type is KTY84-130. 

If not, change it to KTY84-130.

4. Check whether the electronic control motor temperature protection settings are 

correct. The settings are:

LS-J series, LS-F series: 140°C limit torque and power, 160°C motor  protection.

BF-40F: 160℃ limiting torque and power, 180℃ motor protection.

4

The motor is reversed.

Check that the three-phase cables are connected correctly. Depending on the controller, you can also adjust the A/B phase sequence to reverse the motor's direction.

5

The reducer is making unusual or loud noises.

Check if the reducer is low on oil.

Supplier Information

Company:eriksen

Email:service35@ttbridge.com

Tel:17734786008

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