User manual

TMC603-EVAL MANUAL (V. 1.01 / April 14th, 2009) 21

You can also start the BLDC motor with open loop current control. Please check if the jumpers X212,

X213 and X214 are plugged. Select the operating mode “Block, HallFX, Open Loop” and enter the

parameters as shown in Figure 15 (page 20). Please keep in mind to press the “Set” buttons.

Thereafter, press the “Start” button and the motor will ramp up via open loop current control and will

run by using the sensorless BLDC back EMF commutation hallFX™. If the motor is not running, the

parameters should be calculated experimentally.

For using hall sensors, please check if the jumpers X212, X213 and X214 are not plugged. Then plug

the hall sensor connector to X112. Thereafter select the operating mode “Block, Hall Sensor” and

enter the parameters as shown in Figure 16 (page 20). Please keep in mind to press the “Set” buttons.

Then, press the “Start” button and the motor accelerate up to the defined speed reference value

(Speed Ref.).

In addition you can select the chopper mode. Three chopper modes are available: Low side chopper,

high side chopper and dual chopper (default). If you select the low side chopper mode, the low side

drivers are chopped only. In the high side chopper mode the high side drivers are chopped only. If you

select the dual chopper mode (default), the high side drivers and the low side drivers are chopped with

the same signal. The option “Invert Hall Sensors” can be selected optionally if the signals of the hall

sensors are inverted to the hallFX™ signals. If this option is unused the firmware of the TMC603

evaluation board will configured the correct setting automatically.

In order to disable the speed control, please deactivate the option “Enable speed control” and set the

PWM duty cycle reference value (Duty Cycle Ref.). Then press the “Set” button. The motor will run

without speed control. You can change the PWM duty cycle by setting a new duty cycle reference

value (Duty Cycle Ref.).