Key Points in Selecting Motors for Small EVs: Considering the Differences in Road Conditions Between China and Japan
1. Introduction: Small EVs Require Different Conditions in China and Japan
In China, electric two-wheelers and small EV mobility products are widely used in various everyday situations, such as commuting, shopping, short-distance travel, and delivery.
This widespread use has been supported by several factors, including strong demand for short-distance mobility in urban areas, a mature supply chain, affordable pricing, and rapid product development.
In addition, many electric mobility products in China are used in relatively flat urban areas and daily living zones, creating favorable conditions for their adoption.
On the other hand, when introducing small EV mobility products into the Japanese market, it is not always sufficient to simply apply the same specifications used in China.
Japan has its own road conditions, terrain, and usage environments, including roads with slopes and elevation differences, as well as narrow residential streets commonly found in regional cities and suburban areas.
For this reason, when developing small EVs for the Japanese market, it is important to select motors based not only on price and maximum speed, but also on actual usage conditions, such as strong starting performance, hill-climbing capability, and stable operation at low speeds.
2. The Often-Overlooked Challenge in the Japanese Market: Slopes
One important factor that cannot be overlooked when introducing small EV mobility products into Japan is the prevalence of slopes and elevation differences.
In central areas of major cities such as Tokyo and Osaka, there are relatively flat districts. However, when looking at Japan as a whole, the country has many mountainous and hilly areas, and slopes are commonly found in regional cities and residential neighborhoods.
For example, Japan has various road environments, such as steep slopes within residential areas, elevation differences between stations and homes, local roads in regional areas, tourist destinations, agricultural regions, and roads in mountainous areas.
When small EV mobility products are used in daily life, they do not always run only on flat roads.
They may need to start on a slope, climb uphill while carrying luggage, or maintain stable movement at low speeds on inclined roads.
In such environments, what matters most is not only maximum speed, but also the ability to deliver sufficient power in the low-speed range.
In other words, for small EV development in the Japanese market, motor selection that matches the actual road environment is essential, in addition to price and design.
3. Motors with Poor Hill-Climbing Performance Reduce Practical Usability
If the performance of the motor installed in a small EV is insufficient, various issues may occur on slopes or under high-load conditions.
For example, the vehicle may lack power when starting on a slope and fail to move smoothly.
Its speed may drop significantly when climbing uphill.
When carrying people or cargo, the load on the motor increases, which may lead to higher heat generation and increased power consumption.
If such conditions continue, the battery may drain more quickly, and the overall driving stability of the vehicle may also be affected.
From the user’s perspective, a vehicle that feels unstable or unreliable on slopes becomes difficult to use as a daily means of transportation.
For small EV mobility products, it is not enough to simply be able to “move.”
They must be safe and reliable for daily use, and they must be able to deliver sufficient power when needed.
Especially in the Japanese market, small EVs may be used in various environments, including slopes, narrow streets, residential areas, and regional cities.
Therefore, motors are required to provide low-speed torque, hill-climbing performance, and stable controllability.
4. Advantages of Geared and Reduction Motors
There are various types of motors, but for small EV mobility products, it is important to select the appropriate motor according to the intended usage environment.
General gearless motors have advantages such as a simple structure, low noise, and ease of maintenance.
On the other hand, in applications that require large torque at low speeds, they may not be able to deliver sufficient power depending on vehicle weight and slope conditions.
In contrast, geared motors and motors with reduction mechanisms can increase torque by reducing the motor’s rotational speed.
In other words, even with a similar output level, a motor with a reduction mechanism can provide stronger performance when starting and climbing slopes.
Geared and reduction motors are especially useful in applications such as:
- Small EVs used in areas with many slopes
- Cargo-carrying mobility products
- Low-speed mobility products that carry passengers
- Mobility support devices for elderly care and welfare applications
- Electric carts used in agriculture, factories, and facilities
- Robotic carts and automated transport equipment
In these applications, it is more important to move stably at low speeds, start smoothly under load, and operate safely on slopes than simply to achieve high speed.
For this reason, geared and reduction motors can be an effective option for small EV development in the Japanese market.
5. Features of Our Motors
Our company handles geared in-wheel motors for small EV mobility applications.
Our motors are designed to utilize a reduction mechanism, making it easier to generate torque in the low-speed range.
As a result, they are well suited to practical driving conditions required in Japan, such as starting on slopes, climbing hills, and operating under load.
In particular, the Japanese market includes a wide range of usage environments, not only in urban areas but also in regional cities, residential neighborhoods, tourist areas, agricultural regions, and facility-based mobility applications.
In such environments, not only flat-road driving performance but also stability on slopes and at low speeds is extremely important.
Our geared in-wheel motors can be proposed according to these applications, and we can also support specification consultations and customization.
In addition to motors themselves, our company can also propose suitable drivers and controllers for the motors.
In small EV development, not only the motor but also the combination with the driver and controller has a significant impact on driving performance.
For example, starting acceleration, control on slopes, stability at low speeds, regenerative braking, speed adjustment, and operability can vary greatly depending on the combination of the motor and control system.
For this reason, we provide total solutions that include motors, drivers, and controllers according to the customer’s application and vehicle specifications.
Our strength lies not only in supplying components, but also in supporting motor selection, specification confirmation, and development-stage consultation based on the actual usage environment.
6. Conclusion
The know-how developed through the widespread use of small EV mobility products in China can be very useful for the Japanese market.
However, when introducing small EVs into Japan, it is necessary to adapt the design to Japanese road conditions and usage environments, rather than simply applying the same specifications used in China.
In particular, because Japan has many roads with slopes and elevation differences, low-speed torque, hill-climbing performance, and stable starting performance are important.
For small EVs, the motor is a key component that directly affects the practical usability of the vehicle.
Instead of focusing only on price and maximum speed, it is necessary to select a motor by considering whether the vehicle can operate safely and reliably in the actual environment where it will be used.
Our company can propose geared in-wheel motors that are well suited for slopes and high-load conditions, as well as motors, drivers, and controllers tailored to various applications.
Please feel free to contact us when developing or introducing small EV mobility products for the Japanese market.