Fuji Electric FRENIC-Ace series, Руководство пользователя

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4.6 Selecting a Desired Motor Drive Control
4-10
4.6.7 Vector Control without speed sensor and magnetic pole position sensor for
PMSM
This control estimates the motor speed based on the inverter's output voltage and current to use the estimated
speed for speed control. In addition, it decomposes the motor drive current into the exciting and torque current
components, and controls each of those components in vector. No PG (pulse generator) interface card is required.
It is possible to obtain the desired response by adjusting the control constants (PI constants) using the speed
regulator (PI controller).
Since “Vector control for PMSM without speed sensor and magnetic pole position sensor” uses motor
parameters, the following conditions should be satisfied; otherwise, full control performance may not be
obtained.
• A single motor should be controlled per inverter.
• Motor parameters P02, P03, P30 and P60 to P63 should be properly configured. Or, auto-tuning (P04)
should be performed.
• In the HHD mode, the capacity of the motor to be controlled should be the same as that of the inverter;
otherwise, the inverter may not control the motor due to decrease of the current detection resolution. In
the HND,HD and ND modes, the inverter can drive the motor that is 1 or 2 ranks higher than the inverter.
• The wiring distance between the inverter and motor should be 100 m (328 ft) or less. If it is longer, the
inverter may not control the motor due to leakage current flowing through stray capacitance to the
ground or between wires. Especially, small capacity inverters whose rated current is also small may be
unable to control the motor correctly even when the wiring is less than 100 m (328 ft). In that case, make
the wiring length as short as possible or use a wire with small stray capacitance (e.g., loosely-bundled
cable) to minimize the stray capacitance.
• To use the inverter with the output frequency exceeding 500 Hz (in case of ND mode, up to120Hz), it is
recommended that the carrier frequency (F26) be set to 4 kHz or higher.
• Do not use it outside of the speed control range (1:10).