Improvements to the motor housing structure and high-density winding design have made the idea of a "portable car" a reality
Today, all types of transportation, including cars, scooters, and scooters, are moving towards electrification. Among them, an electric "portable car" with the characteristics of "standing driving" and "four-wheel stable driving" has attracted wide attention in the market with its unique creativity and conception. It is shaped like a 13-inch laptop that can be carried around in a backpack and can reach a top speed of 16 kilometers per hour. In the future, if the relevant provisions of the Road Traffic Law can be relaxed, this product will definitely become a fashionable and advanced means of transportation for people's daily travel
The new mobility vehicle is equipped with a small hub motor newly developed by Japan Servo Corporation. The in-wheel motor has many characteristics, such as simplifying and downsizing the design of the body structure by virtue of its independent drive, and also improving the quietness and weight reduction of the motor by eliminating the need for a gear reducer
The fully improved motor rigidity and small high-power output performance fully meet the technical requirements of this new travel tool
In addition to ensuring the weight reduction and downsizing of the product itself, the WALKCAR also fully considers the power performance required to carry an adult and whether it can withstand external forces such as bounce, shake, and impact caused by uneven road surfaces, up and down shoulders, and blind roads during driving. In order to meet the above technical requirements, Japan Servo decided to comprehensively improve the basic structure of the motor on the basis of the original hub motor.
The internal structure of a hub motor is generally divided into two parts: a rotatable outer rotor and a base that functions as a fixing bracket, including a fixing ring. There is only one connection between the base and the outer rotor, and the speed of the rotor will deviate under the action of external force.
As shown in the figure below, in order to further improve the overall rigidity of the motor, the retaining ring is fixed to the bearing, so that the retaining ring rotates with the bearing. There is only one part of the flange on the base (fixed part), and the fixation, yoke sleeve and hub are welded together (integrated) to improve rigidity.
By welding the retaining ring connecting the fixed shaft to the hub of the motor housing, the motor housing and the base become a complete rotating body, effectively improving the overall rigidity of the motor.
In addition, in order to meet the customer's request to upgrade the conventional motor with a diameter of 60 mm and a power output of 30 W to a high-power motor with the same diameter and a power of 65 W, we changed the design of a high-density winding with a higher density of 14 poles and 12 slots to a higher density of 14 poles and 12 slots in addition to the previous 10-pole and 12-slot winding. In this way, the magnetic flux can be increased to increase the torque, and at the same time, the problem of periodic torque ripple decline can be reduced.
The use of highly flexible wires and the reduction of speed deviation bring users a more stable and safe sense of control
In order to prevent problems such as wiring breakage or detachment of internal magnetic blocks due to vibration during driving, we have re-improved the materials used and the production process. Finally, in terms of materials, we decided to use highly flexible wires with higher flexibility; In terms of production process, we make our own special tools and cooperate with the new production process to make the glue applied thinner and more uniform. Through the above two improvements, the durability of the hub motor is effectively improved.
The WALKCAR is a purely electric mobility tool with a very short wheelbase of less than 200 mm. Generally speaking, the longer the wheelbase of the transportation tool, the higher the stability when driving in a straight line, but for the WALKCAR, which is characterized by its lightness and compactness, the wheelbase is greatly limited. In addition, the WALKCAR is driven by two hub motors in the front wheels when driving, and if the speed of the left and right hub motors deviates, the WALKCAR will not be able to drive in a straight line. In the production process of conventional motors, there is a tolerance of 10 to 15% in the motor speed tolerance, but the motor for the WALKCAR requires that the speed deviation be controlled within 5%.
To do this, we readjusted the mounting position of the magnetic flux sensor inside the motor. Under normal circumstances, the speed deviation caused by the installation position of the sensor is completely negligible, but in order to meet the technical requirements of WALKCAR, we have successfully controlled the speed deviation within the range of ±5% by installing a special jig and an automatic detector with accurate monitoring programs.
We sincerely hope that this small, lightweight, durable, and high-power in-wheel motor developed through the above improvements will be more widely used in various transportation tools such as unmanned guided vehicles, electric mopeds, and service robots.
|
More on that
|
Nidec Co., Ltd. (Nidec) co-developed an air purifier equipped with a coaxial reversing propeller fan and won the 2021 Energy Saving Award
Japan Denco (Nidec) and Zojirushi Co., Ltd. jointly developed the PU-AA50 air purifier equipped with a coaxial reversing propeller fan, which won the "Energy Conservation Center Chairman's Award" in the "Product and Business Model Category" of the 2021 Energy Conservation Awards Japan.
|
|
Japan Dec (Nidec) has developed an ultra-thin linear vibration motor
Japan Denco (Nidec) has developed the "Slider" ultra-thin linear vibration motor.
Linear vibration motor "Slider
Currently, many smartphones and smartwatches on the market are equipped with vibration motors. Previously, it was mainly for the purpose of using an eccentric motor with a single vibration ...
|
|
Autonomous driving technology
We will further improve the level of advanced driver assistance technology and take on the challenge of realizing autonomous driving.
With the concentration of population in urban areas and the continuous aging, the reduction of traffic accidents, the reduction of traffic congestion, and the reduction of environmental load are not only aimed at by the automotive industry, but also by society as a whole.
|
|
The right-hand man of industrial automation - servo motors and reducers
Servo motors and reducers are 3C industrial robots and automation, etc
An indispensable product in the field.
When using servo motors, it is used with a reducer,
Not only can it save costs,
It can also greatly improve the productivity of enterprises.
Nidec has you covered
Servo motors and ...
|
|
Sub-micron precision machining technology
It has achieved precision machining technology that has a high global market share of hard disk drive motors
It is the backbone technology that supports the manufacturing business of the Japan Electricity Group.
The Japan Dec Group manufactures motors, sensors, fans, blowers, pumps and other products, with special requirements for high precision ...
|
|
Platformization of electric vehicles
Set out to develop a shared platform that will control the lifeblood of future electric vehicles
Today, the global automotive industry is ushering in a once-in-a-century wave of technological innovation. Among them, the most representative are the two major technical fields of automobile electrification and autonomous driving, among which the pure electric vehicle driven by the motor ...
|
|
Development of a built-in intelligent motor for a microcomputer
It is necessary to build a smart motor in accordance with the high performance, miniaturization, and low cost of the computer
In the past, there was an idea of building a computer into the motor and controlling the motor on the motor side. However, a computer that can be built into a motor must be small and low-cost, and have a real ...
|
|
How Nidec inverters realize stepless speed regulation of motors
We all know that the inverter only connects the three major wires of the motor: R, S and t, and has an in-depth understanding of the principle of frequency conversion speed regulation, so that the stepless speed regulation of the motor can be realized.
The following is an introduction to the stepless speed regulation of the motor by the inverter...
|
|
Nidec Inverter Instruction Manual Quick and Brief Reading Guide
Nidec inverter is one of the most important inverters in the inverter market. Due to the excellent performance of Nidec inverters, Nidec inverters are widely used in various industries, especially in various industrial industries. The problem that arises is that when everyone uses Emerson drives...
|
|
Electric oil pump for automobiles
Hybrid and all-electric drives play a decisive role in the energy saving and emission reduction of automobiles
As well as the idle start-stop function, the existence of electric oil pump cannot be ignored.
Taking the opportunity of the oil crisis that broke out in the Middle East in the 70s of the 20th century, since the beginning of the 21st century, the global automobile market has ...
|
|
The electric power steering motor is integrated with the power supply of the ECU
Development of the world's smallest and lightest power pack that can integrate electric power steering motors and ECUs
The widely used EPS (Electric Power Steering System), which was developed based on energy conservation and emission reduction of automobiles, has once again made a new breakthrough. With the automotive market's demand for space-saving, lightweight...
|
|
Japan Denko's own CAE technology
In order to explore the optimal structure of hydrodynamic bearings, modeling technology and analysis software were developed in-house.
Japan Electronics has created a design method that makes full use of the computing power of supercomputers to analyze the fluids of fan and blower modules. At the same time, the company has also ...
|
|
When a heat wave hits, cars can also suffer from heat stroke?
A new round of heat wave is coming, and it is running non-stop
The car motor is still working non-stop in the high temperature,
Drive the car through the scorching sun,
Poor heat dissipation will inevitably cause the car to "heat stroke".
What is the key to cooling down the heat of the car?
Come and see Nidec's
The four major heat dissipation generals ...
|
|
Nidec's Technological Strength Rapid prototyping
Contribute to shortening the R&D cycle, R&D process, and reducing costs
Rapid R&D at a speed that far exceeds customer needs.
In recent years, the Japan Electricity Group has been working on the construction of fans, gears, structural parts for automobiles, and even motors such as sensors and drives, as well as peripheral parts for motors.
|
|
Nidec – Helium-filled HDD
By reducing the resistance of the airflow, the vibration of the disk is reduced
Realize the improvement of burning/reading accuracy of disks and low power consumption.
Normally, the inside of an HDD is filled with the same air as the outside world. The memory capacity of each unit of the HDD has increased with the evolution of the head and the way of recording.
|
|
Silent technology for traction drives
In order to realize an automatic conveyance device that requires quietness.
As the declining birthrate and aging population increases, the labor force is decreasing, and automatic conveyance devices that replace human labor to carry goods at the site of the logistics system are spreading. Even without the need for a guide device such as a tape ...
|
|
It is a motor for DCT (dual-clutch transmission).
Research and development of energy-saving and powerful DCT systems,
and drive motors using DCT technology.
The trend in the automotive industry is to save energy or reduce the environmental burden. In this trend, the electrification of automobiles is developing rapidly.
|
|
Nider Scientific has issued a notice on the new electric power steering system motor power pack
Nidec Co., Ltd. (hereinafter referred to as "Nidec") has developed a new electric power steering motor power pack*1 (hereinafter referred to as "EPS-PP": Electric Power Steering Motor Power Pack).
Since the nineties of the last century, ...
|
|
E-Axle drive motor system (EV drive motor system)
Combining the technologies of the Japan Dec Group, we will commercialize the "heart of electric vehicles".
- Powerful leadership in the global automotive electrification process with its compact and lightweight products, integration of components, and rapid R&D speed
- Contribute to greater freedom of vehicle design, ...
|
|
Nidec Electric, a different air purifier for healthy breathing!
In late autumn and early winter, the air gradually dries
Add to that the sudden drop in temperature and the spread of the virus
As a result, some susceptible people are afflicted with respiratory infections
All kinds of air purifiers and humidifier products are directly hitting this kind of pain point
In the name of nourishing and enjoying life, it breaks the restrictions on the use of scenes
Medical ...
|
|
Contact
working hours
