Communication Interfaces - Hacker HST-350 Betriebsanleitung

Mounting and commissioning
PWM Mode (Duty-cycle control)
The received setpoint is converted into a PWM signal with a variable duty cycle which is proportional 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
accordingly to compensate for this behavior. This mode is standard in most controllers.
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 of the motor power. This mode is particularly suitable for traction drives where users want to
control the torque.
This mode can also be combined with a recuperation function. A braking current can be entered at setpoint
zero.
Speed control (RPM mode)
The setpoint signal received from the master is converted to a target speed setpoint and controlled by PID
values (proportional, integral and differential). 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 sluggish-
ly than the current mode mentioned in 4.2. The user must also set the PID values very carefully to avoid
overshoot.
Speed control works in both directions. If the motor shaft is driven, then the controller brakes to the target
speed and recuperates the current back into the power source (CAUTION: Does not work with power sup-
plies).
Generator Mode (Gen Mode)
For this mode, parameters such as charging end voltage and target speeds must be entered in the EE-
Prom. In this mode it is possible to use the controller as a charge controller or also as a pure generator.
4.6

Communication interfaces

4.6.1 CAN input
The integrated CAN interface allows the reliable use of bidirectional communication even under complex
conditions. Besides the transmission of setpoints from the master to the controller, detailed telemetry data
can be read back from the system. All connected HST-350 controllers receive their own CAN ID and can
thus be easily configured and updated via the CAN bus. The CAN bus protocol is available on request.
4.6.2 PPM input
The controller supports the R/C standard PPM input (Pulse-Pause-Modulation) This input is optically de-
coupled to avoid interference from sheath currents. The setpoint is calculated from a pulse length between
1 and 2 milliseconds with a maximum repetition rate of 500Hz. The user can configure the bandwidth for
forward and reverse operation.
4.6.3 ADC (U ) analog input
in
Instead of a digital signal, an analog voltage between 0...5V can be applied to the respective port to control
setpoint and brake (recuperation).
Page 48 of 62
Brushless DC Controller HST-350
Orginal operating manual Rev1.3