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E-Motor Dyno Drive

E-Motor Dynamometer Drives to simulate realistic load and force on the E-Motor under test. Regenerative power, ratings up to 35,000 RPM, low intertia solutions, and works with any AC motor.

Develop and test your E-Motor by simulating realistic loads using Unico’s E-Motor Dyno Drive.

This proven E-Motor dynamometer drive is based on Unico’s successful 2400 series inverter, with installs throughout the world. It’s revolutionary technology provides superior control of three-phase AC dynamometer motors. High-switching frequency IGBTs deliver up to 30kHz for testing high speed E-Motors. Torque response in 1 millisecond gives exceptional control of speed and torque to replicate a wide variety or load, stress, and resistance on the E-Motor. NVH low noise operation and acceleration rates up to 300,000 rpm/second – perfectly suited quiet motoring tests and aggressive performance programs.


Testing Applications

E-Motor Dynamometer Drives to simulate realistic load and force on the E-Motor under test. Regenerative power, ratings up to 35,000 RPM, low intertia solutions, and works with any AC motor.

Precision Control and Flexibility

Unico's E-Motor Dynamometer Drives uses a modular design inverter for full regeneration to the three-phase power grid. A proprietary digital current regulator and a state-of-the-art controller allows you to operate any AC dynamometer motor (Asynchronous Induction, Synchronous Permanent Magnet, and IPM - Internal Permanent Magnet) without the current-loop setup required by conventional drives. And IGBTs with a switching frequency up to 30kHz, gives you the performance to run high speed dynamometer motors to match high speed requirements of the E-Motor under test.

Incredible speed and torque response with acceleration rates up to 300,000 rpm per second so you can confidently test with realistic load resistance for aggressive launch control modes, motoring, hill climb, and a variety of throttle applications. Ultra-quiet operation mode using built-in dual current regulators is ideal for NVH testing in both anechoic and hemianechoic test cells.


The drive features full automatic tuning capabilities that can be operated from either a remote terminal or the drive’s built-in keypad. After entering the motor nameplate data, the auto-tuning algorithm automatically identifies the additional parameters for operating the attached motor and configures itself for operation.

Unico’s dynamometer drive provides internal inertia simulation. The inertia simulator can simulate both fixed and dynamic inertias using either internal inertia models or an external real-time command from another controller.

High Speed Link

Supports most industry standard communication protocol, making it versatile to work with any available automation system platform. A high-speed communications interface is optionally available to accept commands from existing customer controllers that are used to generate test profiles. Wired and fiber-optic options are available. Supported protocols include:

  • CANopen
  • CC-Link
  • ControlNet
  • DeviceNet
  • veniam
  • Ethernet
  • EtherCAT (async)
  • Interbus
  • LonWorks
  • Modbus Plus
  • Profibus DPV1
  • Profibus Master
  • EtherCat (sync)

Safety and Protection

Built-in safety and control interlocks are hardwired, opto-isolated, and software configurable to protect your investment and team. And with cabinet enclosure cooling options of air-cooled, water-cooled, and air-conditioned, this system will keep up with your testing and development program.


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Unico Features

General Specifications

Power 30kW to 800kW
Motor Voltage 230 VRMS, 460 VRMS, 520 VRMS
Full Four Quandrant Standard
Max Dyno Speed 30,000 RPM
Fundamental Frequency 1500Hz
Encoder Type Resolver, Quadrature, SinCos
Internal Data Logging 250kHz or higher
AC Input 480Vac, 3Ph, 60/60Hz (other voltages available on request)
Ambient Up to 40°C, max 1000m above sea level, 95% RH non-condensing
Enclosure NEMA 1 (other options available upon request)
Cooling Air cooled (water cooled or airconditioned cabinets upon request)
Cabinet Paint RAL 7035 Rough Semi-glass Poly Powder finish
Certification Compliance UL (other certifications available)
Control Local and remote
Built in remote interface Analog as well as RS-422, RS-485, two ports (other interface and protocol, see options below)
Safety and control interlocks Hardwired, opto-isolated, software configurable
Unico Features


Isolation transformer Various sizes as required
Insulation monitoring Available
Remote voltage sensing Available
Additional analog and digital input, output Technical discussion required
Cabinet paint finish Customer specific
Protection class NEMA 12
External communication interface CANopen, CC-Link, ControlNet, DeviceNet, Ethernet, EtherCAT (async), Interbus, LonWorks, Modbus Plus, Profibus DPV1, Profibus Master, EtherCat (sync)