Exro Technology

Coil Driver™

Optimizing the intelligence, power, and efficiencies in electric motors with the world's most intelligent electric motor controller.

Equipped with advanced power electronics, the Coil Driver™ can drive any AC motor with increased performance in a wide range of applications up to your peak power.

  • Enables multiple power settings in a single motor
  • Next-generation control algorithms optimized for motor coil switching
  • Compliance with international automotive standards for functional safety and reliability

Coil Driver™ was named a Gold award winner for the 2022 Edison Best New Product Awards™ in manufacturing, logistics and transportation.

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Intelligent: Switch between Series and Parallel modes in real-time

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Powerful: Enhanced performance at high speed, better startability and gradeability at low speed

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Efficient: Improved operational efficiency, less mechanical loss, extended range

Leading the revolution to intelligent electrification

Exro has developed a new dynamic controller, the smart Coil Driver™, that replaces the standard controller of an electric motor. This controller effectively creates an intelligent electronic gearbox inside the motor. Our Coil Driver™ electronically switches the motor coil configuration in real time, seamlessly and under demand. The intelligent coil switching establishes a greater depth of control of an electric motor using the coils already installed. The ability to change configurations allows efficiency optimization for each operating mode, resulting in smarter energy consumption. The Coil Driver™ automatically selects the appropriate configuration in real time so that torque demand and efficiency are optimized.

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Results have not been independently verified. Metrics are specific to the application and may differ in other applications.
Top-down view of an electric car chassis, with the vehicle's battery and other inner parts visible.

Third Party Validation on Coil Driver Technology

Independent third-party organization AVL conducted multiple tests on Exro’s Coil Driver™, demonstrating its coil switching capabilities to optimize performance of an electric motor through the power electronics. Results also prove Exro’s Coil Driver™ has successfully combined two traditionally separate formats of power electronics for the first time, that has the potential to reduce the weight and cost of electric powertrains.

Our Products

A020 Coil Driver™:
100V Motor Controller

Exro Technologies’ A020 inverter is an advanced motor controller, created with revolutionary Coil Driver™ technology. Exro’s patented technology optimizes the powertrain, enhances torque, and improves performance in 2&3-wheelers, ATVs, light utility vehicles, and light duty applications.

Applications
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2-3 wheelers

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Light duty vehicles

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Light utility vehicles

L040 Coil Driver™:
800V Motor Controller

Exro Technologies’ L040 inverter is an advanced motor controller, created by the revolutionary Coil Driver™ Technology. Exro’s patented technology uses intelligent coil switching to optimize the powertrain, enhance torque, and improve performance in medium and heavy duty, commercial, and municipal electric vehicles.

Applications
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Heavy duty vehicles

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Commercial vehicles

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Municipal vehicles

L080 Coil Drive System™:
400V Motor & Inverter System

Exro Technologies’ Coil Drive System™ (CDS) is an advanced traction drive system, designed to integrate with standard direct drive and axle powertrains. CDS is powered by Exro’s revolutionary Coil Driver™ technology and integrated with a Permanent Magnet Synchronous Motor (PMSM). Exro’s patented technology uses intelligent coil switching to optimize the powertrain, enhance torque, improve performance, and reduce system cost in medium and heavy-duty electric vehicles.

Applications
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Heavy duty vehicles

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Commercial vehicles

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Municipal vehicles

New Application: Coil Drive™ Charger

Exro Technologies unveils a new application for its patented Coil Driver™ technology that has the potential to dramatically reduce the cost and complexity associated with deploying electric vehicle infrastructure at scale.

  • Removing the onboard charger (OBC)
  • Removing the external AC/DC charger
  • Add Vehicle to Everything (V2X) capabilities
Read more

The Exro Difference

Switching automatically and seamlessly, Coil Driver™ selects the appropriate torque profile to optimize the current torque and speed demand. Unlike standard electric motor controllers, Coil Driver™ achieves 100% utilization of DC link voltage in both its series and parallel modes. This significantly extends the capabilities of the electric motor, leading to:

  • Starting motor torque increase
  • Overall motor torque output improvement across the speed spectrum
  • Enhanced power across the speed spectrum
  • Reduced mechanical loss and total cost of ownership
Legend indicates blue line on graph represents Exro Coil Driver and grey line is Industry Standard.
Line graph shows Exro Coil Driver has 60% performance improvement compared to industry standard.Line graph shows Exro Coil Driver has 150% performance improvement compared to industry standard.
Performance curves are based on a system comprised of Exro 800 Coil Driver™ and TSA TMPW 38-26-8 motor.

Traditional Inverter

  • Controls how the motor behaves to meet load requirements
  • The motor is static with a traditional inverter

Exro Inverter

  • Controls how the motor behaves to expand load requirements
  • The motor is dynamic with an Exro inverter

Standards and Compliance

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Component Standards

  • AEC-Q100
  • AEC-Q101
  • AEC-Q200
  • ROHS
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Toxic Material and Flammability

  • UL94-V0
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Functional Safety

  • ISO26262
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Automotive Quality Management System

  • IATF16949
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Automotive Electromagnetic Compatibility

  • CISPR-25
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Shock and Vibration Standard

  • GMW3172 sprung masses

Interested?

Start a simulation of your application with our technology today.
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