Software Specifications - Renesas RA6T2 Application Note

Sensorless vector control for permanent magnetic
synchronous motor - 1shunt current detection

2.4 Software specifications

Table 2-8 shows basic software specification of this system. For details of the sensorless vector control,
refer to the application note 'Sensorless vector control for permanent magnet synchronous motor (Algorithm)'
(R01AN3786).
Table 2-8 Basic Specifications of Sensorless Vector Control Software
Item
Control method
Position detection method
Motor rotation start/stop
Input voltage
Main clock frequency
Carrier frequency (PWM)
Dead time
Current control period
Speed control period
Rotation speed control
range
Natural frequency
of each control system
Optimization setting
of compiler
Processing stop for
protection
R01AN6840EJ0100 Rev.1.00
May 23, 2023
Content
Vector control
Sensorless
SW1 input or input from 'Renesas Motor Workbench'
DC 24 [V]
RA6T2: 240 [MHz]
RA6T3: 200 [MHz]
RA4T1: 100 [MHz]
10 [kHz] (Carrier period: 100 [μs])
2 [μs]
RA6T2: 100 [μs]
RA6T3: 100 [μs]
RA4T1: 200 [μs]
RA6T2: 1000 [µs]
RA6T3: 1000 [µs]
RA4T1: 2000 [μs]
CW: 0 [rpm] to 2400 [rpm]
CCW: 0 [rpm] to 2400 [rpm]
However, 500 [rpm] or less is driven by a speed open loop.
Current control system : 300 [Hz]
Speed control system : 5 [Hz]
BEMF estimation system : 1000 [Hz]
Position estimation system : 50 [Hz]
Optimization level
Disables the motor control signal output (six outputs), under any of the following conditions.
1. Instantaneous value of current of any phase exceeds 3.54(=1.67*sqrt (2)*1.5) [A]
(monitored in current control period)
2. Inverter bus voltage exceeds 60 [V] (monitored in current control period)
3. Inverter bus voltage is less than 8 [V] (monitored in current control period)
4. Rotation speed exceeds 4500 [rpm] (monitored in current control period)
When an external over current signal is detected (when a low level is detected), the PWM output
ports are set to high impedance state.
For Renesas Flexible Motor Control Series
Optimize more(-O2) (default setting)
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