差值在5以内，保持torque_acc_不变

Signed-off-by: huhui <huhui@sharkgulf.com>

Applications/foc/core/thro_torque.c

@@ -96,7 +96,7 @@ static float _thro_torque_for_accelerate(float ration) {
 	   如果差值在正负5以上，需要step 补偿
 	*/
 	float torque_acc_ = thro_torque - acc_torque;
-	float step = 0.01f;
+	float step = 0.0f;
 	if (ABS(torque_acc_) < 5) {
 		torque_acc_ = 0;
 	}else {