The AC electric dynamometer utilizes an AC asynchronous four-quadrant motor as the loading/back-driving unit, enabling bidirectional operation for both load absorption and driving. It possesses high-precision closed-loop control for constant speed and constant torque. The system integrates a mechanical bench, frequency drive unit, high-precision power acquisition module, torque-speed sensor, and industrial measurement and control software to complete a full set of motor performance tests. The electrical energy generated during testing can be fed back into the grid, ensuring energy efficiency and environmental protection. The entire machine is designed and manufactured according to motor testing standards and supports non-standard customization for Permanent Magnet Synchronous Motors (PMSM), AC motors, New Energy Vehicle (NEV) drive motors, and motor controllers.
Applicable Industries: NEV motors, motorcycle motors, industrial servo motors, university research laboratories, and quality inspection for motor component manufacturers.
Core Product Features
Four-Quadrant Operation: Capable of both driving (back-driving) and load absorption in forward and reverse directions; outputs rated torque at low speeds; features a wide constant torque and constant power operating range with fast dynamic response.
High-Precision Measurement: Equipped with a shaft-type torque sensor and a power analyzer to synchronously collect torque, speed, voltage, current, and power, automatically calculating motor efficiency and generating Efficiency MAP diagrams.
Integrated Vibration-Damping Base: Overall cast or welded base, verified by simulation calculations and dynamic balancing; features excellent vibration absorption damping. Rotating parts are equipped with safety shields for stable and reliable operation.
Dual Operation Modes: Supports both manual and automatic programmed control. Manual mode allows real-time modification of operating parameters; automatic mode supports multi-step programming for endurance and cycle testing, with automatic data storage and report generation.
Comprehensive System Protection: Includes protection against over-current, over-voltage, over-speed, over-torque, leakage, and fault shutdown; features fault alarm prompts and diagnostic information display on the software interface.
Modular & Customizable: Power, torque range, maximum speed, DC power supply specifications, communication protocols, and software functions can all be customized; supports integration with customer upper computers and MCU controllers.
Grid Energy Regeneration: Energy generated during the dynamometer's braking/loading state is fed back into the grid, reducing the overall energy consumption of the system.
Main Test Items
1. Torque-Speed characteristic curve test.
2. Torque-Current linearity test.
3. Motor efficiency MAP diagram and controller efficiency test.
4. Fixed-point performance test and load performance test.
5. Endurance cycle test and fatigue life test.
6. Overload and over-speed verification tests.
7. Expandable temperature rise test and locked-rotor test (optional).
Main System Composition
1. Dynamometer Host Unit: Four-quadrant AC asynchronous motor, encoder, coupling, and safety shield.
2. Integrated Mechanical Base: High-rigidity vibration-damping bench with adjustable mounting base for the tested motor.
3. Torque-Speed Sensor: Shaft-type torque sensor with analog or bus output.
4. Frequency Drive Control Cabinet: Four-quadrant inverter and low-voltage electrical components for motor driving and energy regeneration.
5. DC Regulated Power Supply (Optional): Provides constant voltage and constant current power for the tested motor controller.
6. Power Analyzer: Synchronous acquisition of voltage, current, power, torque, and speed signals.
7. Industrial Computer & Monitor: Industrial host responsible for system control and data storage.
8. Measurement & Control Software: Developed based on LabVIEW, supporting manual, automatic, fixed-point, and endurance tests; features curve plotting, data storage, and report export.
9. Cables and Accessories: Includes all necessary cables and safety protection components.
Software Function Description
1. Manual Test: Manually set speed and torque; real-time acquisition of voltage, current, power, torque, speed, and efficiency; manual data logging and real-time curve plotting.
2. Automatic Programmed Test: Edit multi-step test flows (speed-torque-time); the system runs automatically and collects data across all operating conditions.
3. Fixed-Point Test: Set target operating conditions; the system automatically records data once the status is stabilized.
4. Endurance Test: Set cycle rounds and parameter alarm thresholds; automatically logs alarm information if limits are exceeded.
5. Data Management: History data query, curve playback, supports report export and Efficiency MAP diagram generation.
6. Alarm Monitoring: Real-time monitoring of system status with pop-up fault alarms and fault log recording.
Supply, Training, and Warranty
Scope of Supply: Complete test bench hardware, measurement and control software, electrical drawings, user manual, and factory inspection report.
Field Service: Pre-acceptance inspection at the factory; provides training for operation, maintenance, and calibration.
Warranty: 1-year warranty for the entire machine (excluding abnormal damage), with long-term technical support.
Customization Description
- Customization of dynamometer power, torque range, and maximum speed.
- Customization of DC power supply voltage and current specifications.
- Addition of high/low temperature environmental chamber integration and temperature rise acquisition modules.
- Communication protocol customization (for interfacing with customer upper computers or MCU controllers).
- Custom development of software interface, report formats, and special test procedures.
- Custom fixtures and jigs to adapt to different specifications of tested motors.
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