Datasheet

3.2. Board Configuration
The Rx62T has special peripherals built in to support various motor control algorithms and the evaluation board
hardware has to be reconfigured to match the algorithm present in the flash memory. The board hardware
supports both 180˚ sinusoidal and 120˚ trapezoidal drive topologies in sensor-less and sensor modes. However
the sample software provided with the kit supports only 180˚sinusoidal drive method in sensor-less mode by
3-shunt or single shunt current measurement and sensor mode by encoder feedback. The encoder based
algorithm is used for position control. The Rx62T has the resources and capability to support two 3-phase motor
drives simultaneously. The board has all the necessary hardware including the power stage for one 24V BLDC
motor and has a connector to interface with an external power module to drive the second motor. The sample
software provided with the kit supports only the onboard power stage to drive one motor.
3.2.1. 180˚ Sinusoidal Drive Support
The sample software package provided with the kit is comprised of five distinct codes samples to support FPU
based control algorithms. For each algorithm the hardware must be reconfigured by jumper settings shown in
Table 2. The sample code algorithms are divided in two major groups based on the current measurement method
as 3-shunt and 1-shunt.
• 3-Shunt FPU based Vector Control
1) - Sensor-less with External Op. Amp. (Default)
2) - Sensor-less Internal PGA and comparators
3) - Encoder based speed and position control
• 1-Shunt FPU based sensor-less Vector Control
4) - Sensor-less with External Op. Amp.
5) - Sensor-less Internal PGA and comparators
The jumper setting for various sensor-less algorithms are shown in Table 2 below:
Operation JP6 JP7 JP8 JP9 JP10 JP11 JP12 JP13 JP14 JP15
External
OPA
3 - Shunt 1 - 2 – – 1 - 2
1 - 2 1 - 2 1 - 2 1 - 2 1 - 2 1 - 2
1 - Shunt – 1 - 2 1 - 2 –
Internal PGA
3 - Shunt 1 - 2 – – 1 - 2
2 - 3 2 - 3 2 - 3 3 - 4 3 - 4 3 - 4
1 - Shunt – 1 - 2 1 - 2 –
Table 2 Configuration jumper setting
The only sensor based algorithm supported by the sample software package is the encoder based position
control. The hardware configuration for encoder operation is the same as for the 3-Shunt with external OPA. The
position control provides precise rotation angle movement configurable by the user from the control GUI.