ACTIVE AC LOAD FOR INVERTER TESTING

Perfect Balance Between Performance and Price

TST800 SERIES OVERVIEW

Revolutionize your electric and hybrid vehicle development with UNICO’s Active AC Load, the ultimate solution for traction inverter testing in electric and hybrid vehicles. While a full eMotor emulator may dynamically simulate an inductance or the ripple current associated with the inverter’s PWM ripple frequency, this is often not necessary for many inverter test applications. An Active AC Load is specifically designed to allow full power testing, which is not possible with passive loads, while adding the ability to emulate an RL load or motor back emf as seen by the inverter at any power factor. This makes UNICO’s Active AC Load a more cost effective and powerful solution suitable for most inverter validation applications. The seamless integration with open communication protocols simplifies connection to your current electric vehicle testing setups. Plus, if you’re already using UNICO’s regenerative battery emulator system, our modular design ensures easy expansion.

APPLICATIONS

  • Research & Development
  • Validation
  • Durability
  • End of Line Testing
  • Test to Global Standards (LV123, ISO26262, and more)
  • Communication and integration testing
  • eMotor production tolerance checks

FEATURES

  • Software Adjustable Power Factor (Motor) removing the need for complex physical (L-R) matrix
  • Resistive & Inductive load modeling
  • Motor feedback emulation
  • V/Hz control mode
  • More complete testing than HIL or passive load emulation
  • Realistic power factor modeling
  • Back EMF modeling
  • Inertia torque modeling
  • Wide variety of communication protocols available

BENEFITS

OPTIMIZED POWER FACTOR

Maximizes testing efficiency and accuracy with an optimized power factor.

REGENERATIVE POWER
CAPABILITIES

Conserves energy and reduces operational costs with a sustainable, regenerative power model.

BALANCED PERFORMANCE
-TO-PRICE RATIO

Offers high end Active AC Load performance at an accessible price, providing value for a wide variety of inverter testing applications.

ENHANCED SYSTEM
RELIABILITY

Ensures dependable and consistent testing outcomes with a robust design tailored for rigorous, longterm use.

ACTIVE AC LOAD FOR INVERTER TESTING - TST800

The UNICO Active AC Load epitomizes the fusion of precision and innovation, essential for the development and validation of electric drivetrains. At the core of this system lies the SiC INVERTER, ensuring both performance and efficient functionality. This dedicated test system is designed to deliver reliable and reproducible results, which are crucial for advancing electric vehicle technology. Comprising both an Active AC Load and an optional battery emulator, the UNICO system eliminates the need for
actual eMotors and batteries during the initial testing phase. This not only streamlines the testing process but also reduces setup times and costs, allowing for immediate commencement of comprehensive testing procedures.

Unico’s Active AC Load allows early testing of traction/drive inverters to prevent prototype eMotor failure, offering precision and flexibility with a fundamental frequency up to 1500Hz and the ability to emulate motors from 2 to 64 poles. Fault injection verification is preprogrammed for efficient error tracking, and the system is user-programmable to match various eMotor designs closely. Additionally, it supports numerous communication protocols, ensuring compatibility with most industry-standard automation systems, and includes comprehensive safety and protection features to safeguard both the equipment and personnel.

Specifications Table
Specifications
Power 30kW to 800kW
Motor voltage Up to 750VRMS
Number of poles 2 to 64
Back EMF Standard
Full four-quadrant Standard
Inertia torque Standard
Fundamental frequency Up to 1500Hz
Encoder type SinCos, Resolver
Resolver • Poles: 2 to 64 • Offset: -2 π to 2 π radians • Excitation: 2kHz to 20kHz
Programmable parameters • Direct inductance Ld • Quadrative inductance Lq • Magnetic flux • Winding resistance
Fault simulation • 3 Phase open circuit • Phase to phase short circuit
• Motor stalling • Demagnetization • Sensor phase shift
Internal data logging Up to 32kHz
Model calculation Up to 32kHz
AC Input 400-480VAC, 3Ph, 50/60Hz (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, Open loop liquid cooled, closed loop liquid cooling
Cabinet Paint RAL 7035 Rough Semi-gloss Poly Powder finish
Certification Compliance UL (other certification 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
Battery Emulator Specification See Battery Emulator Brochure for available voltage, current and power ratings
Options
Isolation transformer Various sizes as required
Insulation monitoring Available
Additional analog and Cabinet paint finish Technical discussion required
Cabinet paint finish Customer specific
Protection class NEMA 12
External communication interface • CAN open • CC-Link • Ethernet • Profibus DPV1 • EtherCat (sync) • Ethernet IP