VFD selection for motor test bench project
1.Power unit
To make sure the motor constant torque output, keep DC bus voltage stable, and reduce the interference in the site, select Inomax AFE (Active front End) as rectifier, Inomax AFE rectifier adopts IGBT to replace diode rectifier, comes standard with LCL filter, input THDi<5%.
When the motor test bench is working, one motor is under motoring mode, the other is regenerative mode, so can select small power rating rectifier
Converter adopts 2pcs power unit, output frequency range is 0~1000Hz, frequency resolution is 0.01Hz, open loop torque response time is less than 20ms.
2.Control unit
The rectifier control unit (RCU) and inverter control unit (ICU), through drive cable, three modules output uvw at the same time through the reactor and then concatenate the output to drive a single motor
Advantages of Inomax 4Q regenerative drive for motor test bench
1.Significant energy saving effect The mechanical energy generated by the prime mover is converted into electrical energy and fed back to the grid.
2. Good bidirectional loading characteristics Provides two-way consistent loading capacity to adapt to different steering power mechanical tests.
3. Wide range of speed adaptation Basically, the rated load torque can be provided from zero speed to 5-6 times of field weakening.
4. High torque response speed The torque response speed of the electric dynamometer can reach the ms level, and it is used in the simulated load and new energy industry.
5. Provide anti-drag capability Can be used as a power source, such as mechanical efficiency power drag, generator power drag, one machine for multiple purposes
6, a variety of protection functions Provide various protection functions such as phase loss, overvoltage, overcurrent, overspeed, etc., to protect the dynamometer and test pieces.
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