TorqueSync™ is our patented signal translation technology that ensures torque output is perfectly aligned with the game’s physics engine. It synchronizes every update from the simulation with the servo drive at up and over 100,000 times per second, eliminating the “delay”. The result is immediate, lifelike torque response: when you lose traction or clip a kerb, DDX TorqueSync™ translates it to the motor instantly and with exact proportionality. It’s what makes the wheel feel alive, not mechanical.

An encoder is a sensor that measures the position, speed, and sometimes direction of a motor shaft. In Direct Drive wheelbases, the encoder allows the motor controller to know exactly where the wheel is at all times, which is essential for precise force feedback. High-resolution encoders (often optical or magnetic) ensure that micro-movements, vibrations, and road textures are accurately translated to your hands in real time.

An inner runner motor, also called an internal rotor motor, has the rotor located inside the stator. This contrasts with an outer rotor design, where the rotor spins around the outside. Inner runner motors are generally smaller, lighter, and have lower rotational inertia, allowing for faster torque response, less vibration, and smoother control: ideal for sim racing.

Holding torque is the maximum rotational force a motor can produce for a long time, usually during sudden events like hitting a kerb, oversteer, or rapid steering corrections. It gives the wheelbase the ability to feel extreme events in the simulation.

Slew rate on a direct-drive wheelbase is how fast the motor can change torque. Think of it as the “torque acceleration.” If the game asks for a sudden jump from light force to heavy force, a higher slew rate lets the base ramp to that new torque almost instantly, which makes kerbs, jolts, micro-detail and counter-steer cues feel sharp and lifelike instead of mushy. Slew rate is measured in Nm/ms (Newton meter / millisecond).

A slipring is a component that allows continuous electrical power and data to pass between stationary and rotating parts. In this case, from the wheelbase to the quick-release and wheel rim. Replaceable sliprings in DDX TorqueSync™ ensure long-term reliability, easy maintenance, and support for displays, LEDs, and telemetry modules. Slip rings are widely used in medical devices as well as a host of other critical industrial applications.

Front mount capability means the wheelbase can directly attach to the front of compatible sim racing cockpits without adapters. These adapters are widely used. This allows for maximum rigidity, correct ergonomics, and easier cable routing. It ensures that the base feels solid under high torque and fits common setups seamlessly.

The DDX TorqueSync™ uses a multi-core DSP chip which makes it possible to run multiple high-rate control tasks in parallel: a 100 kHz torque loop, advanced filtering and sensor fusion, real-time safety and thermal management, and predictive feed-forward control, all with deterministic timing and ultra-low latency. The result is cleaner detail, higher slew rate, and extra headroom for future features without compromising feel.

MOSFET stands for Metal-Oxide-Semiconductor Field-Effect Transistor. It is an electronic switch inside the motor driver that regulates current to the motor phases. High-quality MOSFETs can handle more current, switch faster, and generate less heat, which directly affects torque delivery and efficiency. It runs at a lower refresh rate as the motorcontroller DSP chip.

Newton meter (N·m) is the unit of torque, which measures rotational force. 1 N·m is the torque produced when a 1-newton force acts at a 1-meter distance from the pivot. In wheelbases, higher N·m means stronger resistance and more realistic force feedback.

Voltage defines speed capability and response, current defines torque. Our drive runs a 350 VDC internal bus and delivers up to 24 A phase current for 26 Nm at the shaft, while drawing about 14 A (peak) from US mains. At higher instantaneous speeds, the motor generates back-EMF, which rises with rpm. A controller can only push current if its bus voltage sits above that back-EMF. With a 48 V system you can achieve high torque at low speed by using a lot of current, but you run out of voltage headroom sooner as back-EMF approaches the supply, so torque falls off at speed and torque transitions slow down. With a 350 V bus there is enough headroom to overcome back-EMF, keep torque available over a wider speed range, and achieve a higher torque slew rate, which translates to sharper, more lifelike force feedback.

In sim racing you rarely spin the motor fast continuously, but you do see rapid direction changes and short velocity spikes when catching slides, hitting curbs, or recentring. Those moments are where voltage headroom matters most, because the drive must push or pull current instantly. That is why we pair the high-voltage architecture with a 1500 W PSU, not to waste power, but to ensure the energy reserve and voltage margin needed for instant torque delivery.

End of the day it is a trade-off. A 48 V approach favours high current at low speed with a smaller PSU, while our 350 V approach favours sustained torque at speed and faster transients with a larger PSU. Different design choices, different performance envelopes.

“Slew rate” is how fast the wheelbase can change torque and direction. DDX TorqueSync™ is class-leading here, so when you countersteer or hit a kerb it can apply or reverse torque almost instantly. In practice it feels like your reactions got sharper, because the wheel keeps up with every sudden input and track detail. You catch slides earlier, place the car with more confidence, and the steering feels natural rather than forced.

This speed comes from the foundation: a 350 V DC internal bus that delivers power without sag, a multi-core DSP running a 100 kHz torque loop, and a low-latency control path from game signal to motor. High voltage means lower current for the same power, which reduces losses and lets torque rise fast and clean.

Harmonic balancing reduces torque ripple at the source and in control, so torque stays consistent as the rotor turns. We use flux-shaping and pole-slot choices to lower cogging and slotting effects, then keep currents clean with field-oriented control and ample voltage headroom. With a fast torque loop and high-resolution encoder, commutation and quantization artifacts are minimized. The result is a flatter torque-versus-angle profile and cleaner transients, which translates to a smoother, more continuous on-center feel without masking useful road and tire detail.

True holding torque refers to the wheelbase’s ability to sustain its rated torque indefinitely without overheating or dropping performance. Many systems reduce torque output under thermal stress, but DDX TorqueSync™’s 26 Nm and 39 Nm models maintain full power for as long as you drive. This consistency is vital for endurance racing. Force feedback stays exactly the same from lap one to lap 300, ensuring total trust in what you feel from the tyres.

At the power levels required for our system, there are simply no suitable off-the-shelf external power bricks available. Typical consumer-grade units top out around 500-600 W, while our drive operates on a 1500 W, 350 V internal supply. The only external options that could handle this are industrial-grade units, which are bulky, noisy, and extremely costly-far from ideal for a consumer sim racing product.

By integrating the PSU, we keep the design compact, efficient, and safe. It allows for optimized thermal management, shorter power paths, and direct control over quality and protection features. The result is a cleaner setup with a single mains cable, no bulky external box on the floor, and a professional-grade power stage that matches the performance of the servo drive itself.