Koenigsegg launches 250 kW “quark” electric drive system

2022-05-28 0 By

Swedish sports car maker Koenigsegg showed off its own electric motor and electric drive.The motor, called The Quark, can produce 250 kW of power and up to 600 Nm of torque — weighing just 30 kg.Koenigsegg described the layout of the electric drive system as a “Raxis Flux” technology that combines axial Flux and radial Flux motors.The axial flux method widely used in today’s electric motors, in which the stator’s magnetic field flows parallel to the axis of rotation, provides high torque.The radial flux topology (radial flow of the stator field) increases the power density.Radial flux motors are still very rare.Such motors are used in LaFerrari’s hybrid system, for example.Mercedes took over Yasa, a British electric motor specialist, last year and plans to assemble Yasa’s radial flux motors for its upcoming high-performance electric vehicles at its Marienfeld plant in Berlin.Commenting on the “Raxis Flux” approach, Koenigsegg said this topology provides “the best torque-to-weight ratio in the industry”.”Quark aims to enhance Gemera’s low speed range to achieve savage acceleration where you need it,” said Dragos-Mihai Postariu, Koenigsegg Motor Design Manager.He added that Gemera’s internal combustion engine focuses on the high-speed range.”In terms of Gemera’s performance, this means a huge power surge, followed by consecutive record speed pushes to 400km/h without any torque or power loss.”To reduce weight, the shaft is made of 300M steel, known in racing and aerospace, while the rotor is made of carbon fibre.According to Development manager Andras Szekely, direct cooling was chosen for efficiency and compact design.Even 28 kilograms is possible without Gemera’s special features, he says.The name quark implies quark elementary particles.They are the only particles that experience all four fundamental forces (electromagnetism, gravity, strong interaction and weak interaction).”Given its relationship to the mystery of magnetism, the quark name is a good fit for a novel electric motor design,” the company wrote.For motors, it says, the fundamentals of magnetism, materials, cooling and packaging are looked at in a new way, rather than following specifications.The carmaker’s CEO and founder, Christian von Koenigsegg, stressed the interplay between torque, speed, power and weight.”This means that when Quark is used in applications such as ships, aircraft or VTOL, a buck transmission is not required and direct drive can be achieved because the RPM of the motor is correct from the start,” said the CEO.”Small, high-rev motors can have a higher peak power-to-weight ratio, but in most applications they require a gearbox to achieve the desired output RPM and torque, resulting in energy loss and increased weight and complexity to do the same job.”While the company is also considering other uses, its main focus, as mentioned earlier, is high-performance sports cars.To this end, Koenigsegg integrated two electric drives with an inverter and a planetary gearbox to create an EV torque vector drive unit called Terrier.Called David, the inverter is a six-phase inverter that independently provides three-phase power to each Quark motor.The Koenigsegg Gemera is the manufacturer’s first four-seater that uses three electric drives as part of a hybrid drive system.In particular, the internal combustion engine of about 450 kW also lacks a gearbox — at lower speeds, the motor takes over.Koenigsegg launches 250 kW “quark” electric drive system first appearing on AutoNode.