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Asynchronous motor closed-loop vector control
• This control mode is used where high-precision speed control or torque control is required, and high-precision
speed control is required even at zero speed.
• An encoder must be installed at the motor end, and the VFD must be equipped with a PG card of the same type as
the encoder. One VFD can only drive one motor.
Synchronous motor V/F control (PMV/F)
• When the frequency (F) is variable, the ratio of the control frequency to the voltage (V) remains constant.
• This control mode is used for all variable speed controls that do not require fast response and precise speed
control. This mode is also used when the motor parameters are not clear, or Auto-tuning cannot be performed.
Synchronous motor open-loop vector control (PMSVC)
• By combining with a PM (permanent magnet) motor that is more efficient than an induction motor, it is possible to
achieve motor control with high-speed control accuracy more efficiently. With no need for a speed detector such as
PG, the rotation speed of the motor is estimated through the output voltage and output current of the VFD. In
addition, in order to maximize the efficiency of the motor and control the PM motor, the current is minimized when
the load is applied.
• This control mode is used for applications that require precise speed control and torque limit functions.
Synchronous motor closed-loop vector control (PMFVC)
• This control mode is used where high-precision speed control or torque control is required, and high-precision
speed control is required even at zero speed.
• An encoder must be installed at the motor end, and the VFD must be equipped with a PG card of the same type as
the encoder. One VFD can only drive one motor.
Voltage frequency separation control (VF_separation)
• This control mode is used to control the output voltage and frequency separately.
• This function is valid only for T3 models with 7.5 kW and above, and T/S2 models with 5.5 kW and above.
Note:
In order to obtain the best control effect, please input the correct motor parameters and perform motorauto-tuning.
Group F02.0x is the basic parameter group of the motor.
In open-loop and closed-loop vector control, the VFD can only drive one motor; and there shall not be too large
between the level of VFD capacity and that of motor capacity. The power of VFD can be two levels higher or one level
lower than that of the motor, otherwise it may cause degraded control performance or failure of drive system.
PID function
PID control is one of the most common auto-control methods. It uses a combination of proportional, integral,
and differential (PID) controls that provide more effective control for automated systems. The functions of PID
control that can be applied to the inverter operation are as follows:
Purpose
Speed Control
Pressure Control
Flow Control
Temperature Control
PID Basic Operation:
PID operates by controlling the output frequency of the inverter, through automated
system process control to maintain the speed, pressure, flow, temperature, or tension
Installations
(1) Installation Environment
The installation environment is very important to give full play to the performance of this product and
maintain its function for a long time. Please install this product in an environment that meets the
requirements shown in the table below.
MasterVert Specifications, HAC_V00
Controls the speed by monitoring the current speed levels of the equipment or machinery
being controlled. This control maintains a consistent speed or operates at the target speed.
Controls the pressure by monitoring the current pressure levels of the equipment or
machinery being controlled. This control maintains a consistent pressure or operates at
the target pressure.
Controls the flow by monitoring the current amount of flow in the equipment or machinery
being controlled. This control maintains a consistent flow or operates at a target flow.
Controls the temperature by monitoring the current temperature levels of the equipment or
machinery being controlled. This control maintains a consistent temperature or operates
at the target temperature.
Function
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