Specific parameters of a brushless hub motor for an electric bicycle 10

Vehicle parameters: Centralized motor drives electric vehicles, wheel generation e-motors drive electric vehicles.

Wheel load with power reduction mechanism.

Electric motors drive electric vehicles.

Non-springed mass ml (kg) 3s ss

The sprung mass is called (kg) but 5 245 245

Power reduction mechanism m, (kg) -12 5

Tire stiffness ie, (nlm) hug fine print 3 gauge just arrived since.

Suspension stiffness is also (nlm) m () m () m () m ( ) ) ( ) ( ) ) ("。

Power reducer digging stiffness (NLM) -20000 tire damping C1 (NI (ML)) so 50 to.

Suspension damping U (n (ml )) 12 12 12 power reducer impedance c, (n (ml )) dish - 1 kan) () power reducer damping c4 (n (ml )) 1 ( ) ().

The controller of the brushless toothed motor and the brushless hub motor is the same.

The controller of the original car is 350W, and the motor should be 350W.

There is no problem with a 350W motor with a 500W controller, but because the current limit value of the 500W controller is relatively large, the battery will break fast after a long time.

If you can't do it for two people, it should be the reason for the battery.

As for the phase loss phenomenon, it has nothing to do with the power of the controller.

In e-bikes, the motor is usually integrated into the hub of the wheel, and this design is often referred to as a hub motor.

A hub motor is a design that integrates the motor directly into the wheel, usually mounted on the front or rear axle. It consists of a motor, a sensor, and a controller that can directly drive the wheel to rotate.

The motor part of the hub motor is located in the center of the wheel and is fixed to the wheel hub. It directly drives the wheel to rotate by connecting it with the wheel axle to convert electrical energy into mechanical energy.

The controller is a device connected to the motor and is responsible for controlling the operation and speed of the motor. It receives the electrical energy from the battery and transfers the appropriate current and voltage to the motor to achieve the rotational speed and torque required by the real hand.

Sensors are typically used to monitor the speed, direction of rotation, and other parameters of the wheels to provide feedback signals to the controller for better control of the motor's operating status and performance.

When the motor is working, through the instructions of the controller, the electrical energy is converted into mechanical energy, which drives the wheel hub to rotate, thereby pushing the whole dust coarse electric bicycle forward. At the same time, the sensor constantly monitors the movement of the wheels and provides real-time feedback to the controller to keep the motor at the appropriate speed and torque output.

If the motor of the e-bike is turning, but the wheels are not moving, it may be due to the following reasons: transmission system failure, hub motor failure, controller failure, connection line failure, etc. In this case, it is advisable to check the drivetrain and related parts of the e-bike, or seek the help of a professional technician to solve the problem.

Holis is mainly engaged in the R&D, production and sales of intelligent equipment manufacturing, providing high-end equipment and intelligent chemical factory solutions for electric drive, electronic control, electrical equipment and precision electronics industries of new energy vehicles.

The common electric bicycle motor is called the hub motor, some can be equipped with spokes and rims, and some do not install spokes to make the motor and rim into one, the latter is also called an integrated hub motor in the industry, the former has good impact resistance, which is beneficial to the motor. Generally, the motor speed of more than 3000 rpm is called high-speed motor, and less than 1000 rpm is low-speed motor. The brushed gearless hub motor can be below 600 rpm.

Home requires the speed of the electric bicycle to be less than 20 kilometers per hour, which translates to about 200 rpm for a 24 (inch) bicycle. You can use a small gear with a large gear to decelerate, and the ratio of the number of teeth of the large and small gears is called the reduction ratio, and the reduction ratio is large, the torque is also large, and the climbing is powerful. The gears can be mounted inside the motor or outside the motor.

Brushed toothed and brushless geared hub motors are installed inside.

The freight three-wheel introduced earlier is a two-stage deceleration, the first stage is inside the series motor, the front protrusion part is a planetary gear reduction mechanism, in which the planetary gear is nylon, the second stage is outside the motor, and the motor output is a pinion, which is driven to the rear axle of the tricycle through a chain, and the rear axle is equipped with a large gear. Although the reduction ratio of the turbine worm is large, the energy transmission efficiency is low. Spur gear reducer is cheap, but noisy; Helical gears or "herringbone" gears have low noise and high cost.

Nylon gears have a shorter life than metal gears, but they are less noisy and cheaper. Theory and practice have proved that: 1. The above-mentioned noise through chain transmission and deceleration is small, the efficiency is high, the machine parts are easy to buy, and the replacement is convenient.

2. The motor is installed at the rear of the shaft, and it is not easy to drop the chain when moving forward.

Generally speaking, brushed toothless, brushless toothless, and brushed toothed, brushless toothed refers to the wheel hub motor with gears and gears inside. The motor with the same power, the toothed one is more powerful than the toothless one when starting and climbing, suitable for sloped road conditions, and the high-speed motor motor has high efficiency. However, this type of motor has a low lifespan, and the accessories are difficult to buy, and the maintenance cost is high.

1. Not necessarily, most of the original brushed motors, but now most of them are brushless.

2. In-wheel motor technology is also known as in-wheel motor technology, and its biggest feature is that the power unit, transmission device and braking device are integrated into the hub, which can greatly simplify the mechanical part of the electric vehicle.

3. Brushless DC motor.

consists of a motor body and a drive.

composition, is a typical mechatronics.

Products. Brushless motor refers to a motor without brushes and commutator (or collector ring), also known as a commutator-free motor. As early as the nineteenth century, when the motor was born, the practical motor produced was the brushless form, that is, the AC squirrel cage asynchronous motor, which was widely used.

However, asynchronous motors have many insurmountable drawbacks to the slow development of electrification technology. Transistors were born in the middle of the last century, so transistor commutation circuits were used instead of brushes and commutator brushless DC motors.

And so it came into being. This new brushless motor is called an electronically commutated DC motor, which overcomes the shortcomings of the first generation of brushless motors.

1. Compared with the switched reluctance motor and the asynchronous motor, it is necessary to compare it in the occasion of energy-saving frequency conversion, and in the case of the need for cavity grip to be driven by frequency conversion, the switched reluctance motor kills the asynchronous motor, especially when it is started at full load and overload, and the asynchronous motor is waiting for the burn-in.

2. Compared with the permanent magnet motor, the cost of the permanent magnet motor is 30% to 40% more expensive in the case of high power, and the permanent magnet motor is suitable for servos below 3kw.

3. Torque ripple is a worldwide problem, all motors have it, the torque ripple of switched reluctance motor is the worst, and the torque ripple of switched reluctance motor is mainly related to the motor, and no one will tell you what it is related to, because this is a technical secret. Electronic control at home and abroad has been mature, but there is a gap between domestic and foreign, so Wu Tong has mature applications abroad, switching reluctance motor belongs to the latest motor technology, will not enter the country so quickly, because the main domestic industrial spirit is imitation. Those who do this line should know that the German wall-breaking machine motor has been dismantled and imitated countless times in the north and south of the motherland.

4. Power density and efficiency are not the problem of switching reluctance motors, the problem of switching reluctance motors is torque ripple, remember that it is torque ripple. If you are still looking for the answer, you are still at the beginner level, and you will never know the answer until the day when the switched reluctance motor matures.