Leafmotor

This paper describes the business 6kV power supply, short-circuit capacity in the grid smaller and larger capacity hub motor controller case, the choice of starting the program, starting the design calculations, analysis and identification, and start driving in the actual assessment and other data.

Many of China’s mining industry is the use of the power supply system voltage 6kV power distribution, power line in the 6kV power distribution, electrical equipment if there is a large capacity (2000kV more) hub motor controller, the motor starting process, the voltage will produce greater volatility, will directly affect the quality of power supply and electric power line the normal operation of other electrical equipment and service life, this is not an option. To solve this problem, the design of the electric motor often used to reduce the voltage of the way start. Therefore, in the design, must be based on network conditions, starting large hub motor controller for starting the calculation, verification, select the correct start method and reasonable starting equipment.

With the all-digital AC servo-systems, hub motor controller is also increasingly used in digital control systems. In order to meet the development trend of digital control, motion control systems they use stepper motors or full digital hub motor controller as executive motor.

As an open-loop stepper hub motor control systems, and modern digital control technology are intrinsically linked. In the current domestic digital control system, the stepper motor is widely used. With the all-digital AC servo-systems, hub motor controller is also increasingly used in digital control systems. In order to meet the development trend of digital control, motion control systems they use stepper motors or full digital hub motor controller as executive motor. While both are similar in the control (pulse train and direction signal), but the performance and applications in use there is a big difference.

I just bought a gas moped (49cc) and plan to convert it to electric. It looks like I’ll need at least 1500W rear hub motor, although I’m willing to go higher if needed (2000W?). Someone on a forum indicated that you do custom windings and I should reach out to you, but I’m not an engineer and can only describe how I’ll use the moped – I can’t offer what specs are best, or if this is within what you can offer.

I would prefer a solid wheel (no spokes) but on your site those only go to 1000W hub motor?

The original moped rear wheel is 17″ with a M62 3-17 tire. I haven’t removed the tire to get the exact fork distance, but I think it is around 175mm

I don’t need a high top speed, 20 mph maximum and mostly I will be in the 0-10 mph range. However, it will be constantly going up and down hills, including several hundred feet of about 15 degree incline. So, I need good low-speed torque.

I weigh about 200 lbs, and the moped (and the tools I’ll be carrying) adds another 100-150 lbs.

This will never be used on public roadways, only on my farm. I live in the USA.

I haven’t started looking at controllers or batteries yet. My first step is to identify the best hub motor option, then I can worry about the rest.

Three-phase asynchronous hub motor controller works
Master formula n1 = 60f / P, S = (n1-n) / n1, n = (1-S) 60f / P, at the same time understand their significance (very important), to be able to make flexible use of these formulas to calculate. Also remember: Usually bldc motor driver at rated load slip SN is about 0.01-0.06. Book to focus on the example grasp.

Three-phase asynchronous hub motor driver nameplate data
(1) Model: grasp the book’s examples.
(2) Rating: general knowledge, to master the rated frequency and rated speed, our frequency is 50 Hz.
(3) Connection method: a Y-shaped and angle.
(4) Insulation class and temperature rise: the definition of control allows the temperature rise.
(5) work: general understanding.
Three-phase asynchronous hub motor controller of the mechanical properties

Master the rated torque, maximum torque and starting torque relationship. The formula to master the book and be flexible calculated. Bearing in mind the following:
(1) in constant rotation, hub motor controller and the resistance torque of the torque must be balanced.
(2) When the load torque increases, the initial instant hub motor driver torque T (3) the general three-phase asynchronous hub motor driver overload factor is 1.8-2.2.
(4) hub motor controller had just started n = 0, s = 1.

The difference between ordinary motor controller and hub motor controller

Generally refers to the hub motor controller. Brush DC motor controller stator magnet (or excitation coil), the rotor of the coil. As the current need to enter the rotation of the coil and the coil rotated 180 degrees due to be exchanged once the direction of the current flowing through the coil, therefore, used for brush DC motor controller connected to the body coil and current. Reversing the direction of switching bodies with a commutator and brush composition.

A hub motor controller generally coils on the starter by the rotation axis of the magnet mounted on the output drive shaft work. To solve the current problem for the use of Hall devices measured magnet pole position, the control circuit to external change, to change the current direction.
Hub motor controller because there are no brushes, long life, motor controller structure has been simplified.