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Medical devices - Wheelchair motor

Client: Mr.Lucks

Country: Austria

Industry: Medical devices

Cooperation time: 2019 to now

Stephen William Hawking, the most important contemporary relativist and cosmologist, is one of the great men with an international reputation. He is known as the greatest scientist in the world and the "king of the universe". In the 1970s, he and Penrose proved the famous singularity theorem, for which they jointly won the wolf physics award in 1988. Therefore, he is known as the world's most famous scientific thinker and the most outstanding theoretical physicist after Einstein. He also proved the area theorem of black holes, that is, the area of black holes does not decrease with time.

A wheelchair, a computer, and a posture are his iconic images. With a tenacious will, he overcame the disease and created miracles. He told the world with practical actions that people can challenge their fate! He is Hawking, a warrior in a wheelchair.

Fate paralyzed Hawking's legs. He couldn't fly a kite with his children or swim in the rippling Lake~~~~~~ But wheelchairs can allow more people with inconvenient feet to go farther and enjoy the fresh air outdoors. Wheelchairs bring a lot of benefits and more beautiful hopes to inconvenient people~~~~~~

What they need：12V 24V 250W DC Wheelchair Motor

DIFFICULTY

In 2019, Marcus (CEO / wheelchair design engineer) from Austria came to us and told us that he wanted to develop a single axle driven electric wheelchair that can go outdoors (forest or snow); Many wheelchairs in the market have limitations and can only walk on smooth roads;

He told me: I hope the new electric wheelchair can be used in the wheelchair field. The manipulation and intuitive operation are revolutionary. Although the size is very compact, it allows you to turn in place and climb over hills and rocks. A single axle wheelchair will be built to demonstrate the comfort and safety of traditional wheelchairs while making full use of the potential of axles. Safety, operability, off-road capability, comfort, and compact size are combined in one device. Then the more important parts come from the power source motor. He should find a manufacturer with reliable quality and production of DC motor and have rich experience.

Requirements for motors:

1. The instantaneous torque of the motor should be large, because many times wheelchairs will run in places with poor road conditions, such as hills, rocks, or forests;

2. The size of the motor should be small. Because the design structure of the whole wheelchair is relatively compact, the motor is required to meet the high torque and be small at the same time, which is very important for the design of the motor.

3. The brake of the motor shall be fast and sensitive;

4. The noise of the motor should be very low;

5. The motor is matched with the battery, and the efficiency of the motor should be high!

SOLUTION

After receiving the inquiry, we admire the customer for his new design concept and vision, as well as the original intention of designing this wheelchair. We promise to manufacture a motor that fully meets the customer's needs

1. The stator of the motor is made of strongly magnetic material. Under the condition of small volume, the power and torque of the motor are increased by 50% on the original basis; The number of winding turns of the rotor avoids the intermittence of the rotor through the simulation software to ensure the maximum efficiency of the motor;

2. The brake of the motor adopts the power-off electromagnetic brake, and the brake pad is made of high wear-resistant, low noise and environment-friendly materials

3. The main source of noise is the noise generated by the friction between the commutator and the carbon brush. We have imported American carbon brush technology, imported contact materials and military-grade electroplating technology; Ensure that the friction between the carbon brush and the commutator is minimized and the noise is minimized;

4. The commutator is made of good silver-copper alloy combined with carbon brush, which optimizes the design of the motor, and the service efficiency of the motor is increased by 10% on the original basis;

Follow up: after the customer receives our motor, after one year of the actual environmental test, the quality, service life, and performance fully meet the customer's requirements.