TMS320F28027: motor automatically shut down

         TMS320F28027FPTT under the power supply of 3.3 v, using the hvlab05b library, without any software protection, the motor automatically shut down, and the state machine will still be in normal operation? After shutdown, found that the speed of less than 100 RPM, maintain 6 seconds, the host began to alarm, the current volume of 300, there are 5 problems