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Evaluation board: drv8301-hc-evm revd
Lab 10a Overmodulation
When the motor is 300 rpm, the output of the torque is weak: I can test our product with a torsometer at 300 rpm to make the motor output 50N.cm. Germany has a product like ours. I use a torsometer to test at 300 rpm to make the motor output 50N.cm, but in the process of actual use, the user finds the torque of our product is about 10N.cm small. (Load mutation in user's actual use is larger than that measured by torsometer)
I confirm that PI parameters and motor parameters are adjusted to a reasonable value.TI engineers are invited to give solutions to the weak and soft output of the torque when the motor is 300 rpm. Thank you very much. The German product gives me the feeling that the torque output is very stable and sufficient.
The motor parameters are as follows
Nominal voltage V 24No load speed rpm 60800No load current mA 282 Nominal speed rpm 57500Nominal torque (max. continuous torque) mNm 23.6Nominal current (max. continuous current) A 6.45Stall torque mNm 561Stall current A 149Max. efciency % 91.6Terminal resistance W 0.161Terminal inductance mH 0.0171Torque constant mNm/A 3.76Speed constant rpm/V 2540Speed/torque gradient rpm/mNm 109Mechanical time constant ms 2.04Rotor inertia gcm 1.79
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