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Brushless DC Controller HST-50
Orginal
operating
manual
Rev1.2
Here you can additionally select whether you want operation with or without Hall sensors. A hybrid
mode is also available, i.e. the controller automatically detects whether sensors are connected.
4.3.2 Field oriented operation (FOC)
In FOC mode the controller drives the motor phases sinusoidally, calculated by load and motor cha-
racteristics. Advantage of this operation mode is the low commutation noise and the high torque at
low speed. Also here you can drive sensored or sensorless.
4.3.3 4-quadrant operation
The motor can be operated both forward and backward. The user can program the acceleration
ramps, braking currents and also the recuperation current individually.
• Unidirectional (not reverse) without recuperation/freewheeling
• Unidirectional (not reverse) with recuperation/active braking
• Bidirectional (reverse mode possible) without recuperation/freewheeling
• Bidirectional (reverse mode possible) with recuperation/active braking
4.4 Power control/operating modes
Depending on the application, the HST-50 can be configured for different operating modes. The
desired mode can be set via the GUI (graphical user interface).
4.4.1 PWM Mode (Duty-cycle control)
The received setpoint is converted into a PWM signal with a variable duty cycle which is proportio-
nal to the setpoint. This changes the voltage at the motor phase and thus the speed of the motor.
The motor speed changes under load or when the input voltage changes. The external controller
must then send new signals to compensate for this behavior. This mode is standard in most control-
lers.
4.4.2 Current control (Current/Tourque control)
The setpoint signal received from the master is converted to a motor current setpoint and controlled
in a direct control loop. This mode creates a high linearity between setpoint and torque and allows
a fast and direct control over the motor power. This mode is particularly suitable for traction drives
where users want to control the torque.
4.4.3 Speed Control (RPM Mode)
The setpoint signal received from the master is converted to a target speed setpoint and controlled
by PID values. This mode controls the motor speed independently of the load. Depending on the
type of motor used and the load applied, this control may respond more sluggishly than the current
mode mentioned in 4.2. The user must also set the PID values very carefully to avoid overshoot.
Mounting and commissioning
