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RAJ306101 RSSK User's Manual
3.2
Sensorless Vector Control
3.2.1
Control Specifications
The sensorless vector control is a control method that estimates the motor position from the motor current in
each phase and drives the motor sinusoidally in the appropriate phase.
Table 3-1 shows the control specifications.
For details of the specifics of the program, please refer to the "RAJ306101 Application Note: Sensorless
vector control for permanent magnetic synchronous motor (Implementation) (R18AN0060EJ)".
Table 3-1 Basic Specifications of Sensorless Vector Control Software
Item
Control method
Position detection method
Motor rotation start/stop
Input voltage
Carrier frequency (PWM)
Dead time
Control period
Rotation speed control
range
Natural frequency
of each control system
Optimization setting
of compiler
ROM/RAM size
Processing stop for
protection
R12UZ0129EJ0100
Rev.1.00
Nov 1, 2023
Content
Vector control
Sensorless
Determined depending on the level of SW101
("High": rotation start, "Low": stop) or input from Analyzer
DC 24[V]
20[kHz]
2[μs]
Current control / Position and speed estimation: 100[μs]
Speed control:1[ms]
CW: 0[rpm] to 2650[rpm]
CCW: 0[rpm] to 2650[rpm]
Current control system: 300[Hz]
Speed control system: 5[Hz]
BEMF estimation system: 1000[Hz]
Position estimation system: 50[Hz]
Optimization level
Optimization method
ROM: 17.1[KB]
RAM: 4.5[KB]
- Disables the motor control signal output (six outputs), under any of the
following conditions.
1. Current of each phase exceeds 0.89[A] (monitored every 100[μs])
2. Inverter bus voltage exceeds 28[V] (monitored every 100[μs])
3. Inverter bus voltage is less than 14[V] (monitored every 100[μs])
4. Rotation speed exceeds 3000[rpm] (monitored every 100[μs])
5. Fault detection of the smart gate driver.
- When an external overcurrent signal is detected (when a falling edge of the
POE10# port is detected), the PWM output ports are set to "Low"' state.
2(-optimize=2) (default setting)
Size priority(-size) (default setting)
Chapter 3. Usage
Page 17 of 55
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