Efficient Power Delivery: How Parvalux Geared Motors Extend Battery Life

In a powered wheelchair, battery performance is one of the most critical factors influencing user experience and safety perception.  

Users expect a suitable range on a single charge, as well as reliable and consistent performance throughout the entire discharge cycle.  

Meeting these expectations are dependent on the geared motor, and how efficiently electrical energy is converted into motion.

User Expectation 

Users have certain real-world expectations from their powered wheelchair, and anything less will affect perceptions of safety and usability. These include:  

• Low-speed manoeuvring 

• Incline climbing 

• Stop-start urban use 

• Continuous operation over extended periods 

At Parvalux we take these expectations seriously and ensure our geared motors: 

• Match motor characteristics to load profiles 

• Minimise current draw during peak demand 

• Ensure smooth torque delivery to avoid energy spikes

The Importance of Efficiency 

Within a standard powered wheelchair there are numerous energy constraints that can lead to electrical, mechanical or control-related inefficiencies, reducing range significantly. Particular challenges include:  

• Limited on-board battery capacity 

• Variable terrain and load conditions 

• Frequent start-stop operation 

• Smooth, precise control 

In order to maximise efficiency, it’s essential to limit how much energy is wasted through excessive heat, noise or mechanical resistance. Reducing these features increases how much energy is converted into useful motion.  

Whilst the electric motor is vital, a poorly optimised gearbox can also cause various challenges including excessive heat and friction, reduced torque transfer and increased energy consumption resulting in a less efficient geared motor.  

Here at Parvalux, we address these challenges head on, and our precision engineered gearboxes ensure that torque is transmitted with minimal loss resulting in a more efficient powered motor.  

One Size Does Not Fit All  

Whilst all wheelchairs essentially do the same job, they do not all have the same requirements. Different wheelchair categories require different performance characteristics and at Parvalux we provide optimised solutions for both standard and heavy-duty applications. 

Standard and Children’s Wheelchairs 

Our BRx70-GB12 geared motor is specifically engineered for compact, lightweight wheelchair designs where efficiency and battery life are paramount. The key benefits include: 

• Optimised gearbox efficiency for low-to-moderate load conditions 

• Reduced power consumption during everyday use 

• Compact integration for space-constrained designs 

• Smooth, responsive control for enhanced user experience 

The BRx70-GB12 geared motor enables longer daily usage without increasing battery size or weight which is ideal for standard or children’s wheelchairs. 

Heavy-Duty Wheelchairs 

Heavy duty wheelchairs on the other hand with their higher load requirements, are more suited to the PM90-GB9 geared motor which delivers the torque needed without compromising efficiency. The key benefits include: 

• High torque output with optimised energy use 

• Robust gearbox design to minimise losses under load 

• Consistent performance across demanding duty cycles 

• Improved range even in high-load scenarios 

The end goal of both the PM90-GB9 and the BRx70-GB12 is to improve efficiency and user experience. This is done by increasing the range of the wheelchair per charge, which reduces the number of charging cycles required. This in turn will extend the battery life and means smaller batteries can be used, further reducing the size envelope. We also aim to ensure a more consistent performance throughout the life-cycle of the geared motor improving the ride for the end user. 

Partnering with Parvalux 

Our team of engineers combines decades of experience in powered wheelchair applications with a deep understanding of electric motors and gearbox efficiency. This means our solutions are not only technically robust but are also finely tuned to real-world demands for standard, children’s and heavy duty applications. 

We understand that in powered wheelchair design, efficiency is the key to unlocking better performance, longer range, and improved user experience. So, we focus on gearbox efficiency and optimised electric motor design, enabling smarter power delivery making every watt count. 

If you are in the process of designing powered wheelchairs and want an efficient, durable and reliable geared motor head to our product pages or speak with a member of the team today.