Other Parts Discussed in Thread: DRV8301, MOTORWARE
Our company imitated drv8301 Revd to make a PCB board, using proj_lab10a.c routine for project development, currently encountered the following very serious problems, request guidance. At present, 5000 motherboards with 28062F + drv8301 have been shipped.
1. For the same set of programs, 100 motherboards are tested in the environment of 5 C. The output torque of 100 motherboards is normal, but the same motherboard and the same program are tested in the environment of 40 C. The output torque of 10 motherboards (about 10% probability of occurrence) is low. After repeated tests, the same motor parameter USER_MOTOR_Rs can't take into account the 10 motherboards. Can you solve this problem? Thanks very much!
2. For the same set of programs, Testing 10 motherboards (about 10% probability of occurrence) at 5 C can not start sometimes, but the same motherboard and the same program can start 100 motherboards in 40 C environment. After repeated testing, the same motor parameter USER_MOTOR_Rs can not take into account the 10 motherboards. Can you solve this problem? Thanks very much!
The probability of the above two problems may be deviated by 10%, but there is a motor parameter USER_MOTOR_Rs which can not take into account the performance of the motor in high and low temperature environment. Our products require normal operation at high and low temperatures. At present, we can only abandon the motherboards with problems, resulting in extremely high costs, and request TI engineers to guide us.
